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Posted to commits@tinkerpop.apache.org by sp...@apache.org on 2024/03/22 14:05:25 UTC

(tinkerpop) 01/03: TINKERPOP-3056 Follow-on fix for mid-traversal mergeE/V

This is an automated email from the ASF dual-hosted git repository.

spmallette pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/tinkerpop.git

commit f7c64dabf07f6d5008bf457690b85b6a86d2c924
Author: Stephen Mallette <st...@amazon.com>
AuthorDate: Fri Mar 22 09:03:26 2024 -0400

    TINKERPOP-3056 Follow-on fix for mid-traversal mergeE/V
    
    Prevents child traversals to option() from having an Element in it so that you can't mistakenly update the wrong thing CTR
---
 CHANGELOG.asciidoc                                 |  6 +-
 docs/src/reference/the-traversal.asciidoc          | 14 ++++
 .../process/traversal/step/map/MergeEdgeStep.java  |  8 ++-
 .../process/traversal/step/map/MergeStep.java      | 35 ++++++++++
 .../traversal/step/map/MergeVertexStep.java        |  7 +-
 .../Gremlin.Net.IntegrationTest/Gherkin/Gremlin.cs |  8 ++-
 gremlin-go/driver/cucumber/gremlin.go              |  8 ++-
 .../gremlin-javascript/test/cucumber/gremlin.js    |  8 ++-
 gremlin-python/src/main/python/radish/gremlin.py   |  8 ++-
 .../gremlin/test/features/map/MergeEdge.feature    | 77 ++++++++++++++++++++--
 .../gremlin/test/features/map/MergeVertex.feature  | 46 ++++++++++++-
 11 files changed, 201 insertions(+), 24 deletions(-)

diff --git a/CHANGELOG.asciidoc b/CHANGELOG.asciidoc
index 27fde68afd..b813d15ae7 100644
--- a/CHANGELOG.asciidoc
+++ b/CHANGELOG.asciidoc
@@ -29,13 +29,13 @@ image::https://raw.githubusercontent.com/apache/tinkerpop/master/docs/static/ima
 * Fixed bug in bytecode translation of `g.tx().commit()` and `g.tx().rollback()` in all languages.
 * Improved error message from `JavaTranslator` by including exception source.
 * Added missing `short` serialization (`gx:Int16`) to GraphSONV2 and GraphSONV3 in `gremlin-python`.
-* Added tests for error handling for GLV's if tx.commit() is called remotely for graphs without transactions support.
+* Added tests for error handling for GLV's if `tx.commit()`` is called remotely for graphs without transactions support.
 * Introduced multi-architecture AMD64/ARM64 docker images for gremlin-console.
 * Fixed bug in `JavaTranslator` where `has(String, null)` could call `has(String, Traversal)` to generate an error.
 * Fixed issue where server errors weren't being properly parsed when sending bytecode over HTTP.
-* Improved bulkset contains check for elements if all elements in bulkset are of the same type.
+* Improved `Bulkset` contains check for elements if all elements in `Bulkset` are of the same type.
 * Fixed bug in `EarlyLimitStrategy` which was too aggressive when promoting `limit()` before `map()`.
-* Fixed bug in mid-traversal `mergeE()` where mutations in `sideEffect()` were being applied to the current traverser rather than a `onMatch` edge.
+* Prevented mid-traversal `mergeE()` and `mergeV()` from operating on an incoming `Traverser` that contains an `Element`.
 * Improved performance of the application of `FilterRankingStrategy` for large traversals with deeply nested traversals by improving the cache operation.
 
 [[release-3-6-6]]
diff --git a/docs/src/reference/the-traversal.asciidoc b/docs/src/reference/the-traversal.asciidoc
index ef1192d0ad..ca89014eef 100644
--- a/docs/src/reference/the-traversal.asciidoc
+++ b/docs/src/reference/the-traversal.asciidoc
@@ -2515,6 +2515,13 @@ g.E().elementMap()
 <1> Create three dogs.
 <2> Stream the edge maps into `mergeE()` steps.
 
+WARNING: There is a bit of an inconsistency present when `mergeE()` is used as a start step versus when it is used
+mid-traversal. As a start step, `mergeE()` will promote the currently created or matched `Edge` to the child traversal,
+allowing you to directly update it like `option(onMatch, property('k', 'v').constant([:]))`. However, when `mergeE()` is
+used mid-traversal, the `Edge` is not promoted to the child traversal and the incoming traverser is used instead. Such
+behavior is essentially blocked to prevent accidental misuse and will result in an exception at execution time that will
+have a message like, "The incoming traverser for MergeEdgeStep cannot be an Element".
+
 The `mergeE` step can be combined with the `mergeV` step (or any other step producing a `Vertex`) using the
 `Merge.outV` and `Merge.inV` option modulators. These options can be used to "late-bind" the `OUT` and `IN`
 vertices in the main merge argument and in the `onCreate` argument:
@@ -2732,6 +2739,13 @@ g.V(400).valueMap().with(WithOptions.tokens)  <5>
 <4> Pixel exists now, so we will take this option.
 <5> The `updated` property has now been added.
 
+WARNING: There is a bit of an inconsistency present when `mergeV()` is used as a start step versus when it is used
+mid-traversal. As a start step, `mergeV()` will promote the currently created or matched `Vertex` to the child
+traversal, allowing you to directly update it like `option(onMatch, property('k', 'v').constant([:]))`. However, when
+`mergeV()` is used mid-traversal, the `Vertex` is not promoted to the child traversal and the incoming traverser is used
+instead. Such behavior is essentially blocked to prevent accidental misuse and will result in an exception at execution
+time that will have a message like, "The incoming traverser for MergeVertexStep cannot be an Element".
+
 *Additional References*
 
 link:++https://tinkerpop.apache.org/javadocs/x.y.z/core/org/apache/tinkerpop/gremlin/process/traversal/dsl/graph/GraphTraversal.html#mergeV()++[`mergeV()`],
diff --git a/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/map/MergeEdgeStep.java b/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/map/MergeEdgeStep.java
index 761426efe3..1010ca5fba 100644
--- a/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/map/MergeEdgeStep.java
+++ b/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/map/MergeEdgeStep.java
@@ -34,6 +34,7 @@ import org.apache.tinkerpop.gremlin.process.traversal.Traversal;
 import org.apache.tinkerpop.gremlin.process.traversal.Traverser;
 import org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.GraphTraversal;
 import org.apache.tinkerpop.gremlin.process.traversal.lambda.ConstantTraversal;
+import org.apache.tinkerpop.gremlin.process.traversal.step.filter.LambdaFilterStep;
 import org.apache.tinkerpop.gremlin.process.traversal.step.util.event.Event;
 import org.apache.tinkerpop.gremlin.process.traversal.strategy.decoration.EventStrategy;
 import org.apache.tinkerpop.gremlin.process.traversal.util.TraversalUtil;
@@ -274,8 +275,11 @@ public class MergeEdgeStep<S> extends MergeStep<S, Edge, Object> {
             edges = IteratorUtils.peek(edges, e -> {
 
                 // override current traverser with the matched Edge so that the option() traversal can operate
-                // on it properly
-                traverser.set((S) e);
+                // on it properly. this should only work this way for the start step form to retain the original
+                // behavior for 3.6.0 where you might do g.inject(Map).mergeE() and want that Map to pass through.
+                // in 4.x this will be rectified such that the edge will always be promoted and you will be forced
+                // to select() the map if you did want the behavior.
+                if (isStart) traverser.set((S) e);
 
                 // assume good input from GraphTraversal - folks might drop in a T here even though it is immutable
                 final Map<String, ?> onMatchMap = materializeMap(traverser, onMatchTraversal);
diff --git a/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/map/MergeStep.java b/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/map/MergeStep.java
index c9a1cf1b0d..d1166c98ce 100644
--- a/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/map/MergeStep.java
+++ b/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/map/MergeStep.java
@@ -46,6 +46,7 @@ import org.apache.tinkerpop.gremlin.process.traversal.traverser.TraverserRequire
 import org.apache.tinkerpop.gremlin.process.traversal.util.TraversalHelper;
 import org.apache.tinkerpop.gremlin.process.traversal.util.TraversalUtil;
 import org.apache.tinkerpop.gremlin.structure.Direction;
+import org.apache.tinkerpop.gremlin.structure.Element;
 import org.apache.tinkerpop.gremlin.structure.Graph;
 import org.apache.tinkerpop.gremlin.structure.T;
 import org.apache.tinkerpop.gremlin.structure.Vertex;
@@ -142,6 +143,14 @@ public abstract class MergeStep<S, E, C> extends FlatMapStep<S, E>
         if (token == Merge.onCreate) {
             this.onCreateTraversal = this.integrateChild(traversalOption);
         } else if (token == Merge.onMatch) {
+            // add a guard rail to ensure that the incoming object is not an Element. this will prevent
+            // a possibly inadvertent mutation of the graph if you did something like g.V().mergeE(). for
+            // 3.x we won't allow this behavior at all but in 4.x we will make it consistent like it will
+            // be in 4.x
+            if (!isStart && traversalOption != null && !(traversalOption instanceof ConstantTraversal)) {
+                traversalOption.addStep(0, new GuardRailStep<>(traversalOption, getClass().getSimpleName()));
+            }
+
             this.onMatchTraversal = this.integrateChild(traversalOption);
         } else {
             throw new UnsupportedOperationException(String.format("Option %s for Merge is not supported", token.name()));
@@ -374,4 +383,30 @@ public abstract class MergeStep<S, E, C> extends FlatMapStep<S, E>
 
     protected abstract Set getAllowedTokens();
 
+    /**
+     * Guard rail to ensure that the incoming object is not an {@link Element}.
+     */
+    public static class GuardRailStep<S, E> extends ScalarMapStep<S, E> {
+        private final String stepType;
+
+        public GuardRailStep(final Traversal.Admin traversal, final String stepType) {
+            super(traversal);
+            this.stepType = stepType;
+        }
+
+        @Override
+        protected E map(final Traverser.Admin<S> t) {
+            if (t.get() instanceof Element) {
+                throw new IllegalArgumentException(
+                        String.format("The incoming traverser for %s cannot be an Element", stepType));
+            }
+            return (E) t.get();
+        }
+
+        @Override
+        public String toString() {
+            return StringFactory.stepString(this);
+        }
+    }
+
 }
diff --git a/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/map/MergeVertexStep.java b/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/map/MergeVertexStep.java
index a976775a99..132adf3e7c 100644
--- a/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/map/MergeVertexStep.java
+++ b/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/map/MergeVertexStep.java
@@ -93,8 +93,11 @@ public class MergeVertexStep<S> extends MergeStep<S, Vertex, Map> {
             // attach the onMatch properties
             vertices = IteratorUtils.peek(vertices, v -> {
 
-                // if this was a start step the traverser is initialized with Boolean/false, so override that with
-                // the matched Vertex so that the option() traversal can operate on it properly
+                // override current traverser with the matched Edge so that the option() traversal can operate
+                // on it properly. this should only work this way for the start step form to retain the original
+                // behavior for 3.6.0 where you might do g.inject(Map).mergeV() and want that Map to pass through.
+                // in 4.x this will be rectified such that the edge will always be promoted and you will be forced
+                // to select() the map if you did want the behavior.
                 if (isStart) traverser.set((S) v);
 
                 // assume good input from GraphTraversal - folks might drop in a T here even though it is immutable
diff --git a/gremlin-dotnet/test/Gremlin.Net.IntegrationTest/Gherkin/Gremlin.cs b/gremlin-dotnet/test/Gremlin.Net.IntegrationTest/Gherkin/Gremlin.cs
index 9fc7e76b51..bf7e01c810 100644
--- a/gremlin-dotnet/test/Gremlin.Net.IntegrationTest/Gherkin/Gremlin.cs
+++ b/gremlin-dotnet/test/Gremlin.Net.IntegrationTest/Gherkin/Gremlin.cs
@@ -689,8 +689,10 @@ namespace Gremlin.Net.IntegrationTest.Gherkin
                {"g_mergeV_mergeE_combination_new_vertices", new List<Func<GraphTraversalSource, IDictionary<string, object>, ITraversal>> {(g,p) =>g.MergeV((IDictionary<object,object>) p["xx1"]).As("outV").MergeV((IDictionary<object,object>) p["xx2"]).As("inV").MergeE((IDictionary<object,object>) p["xx3"]).Option(Merge.OutV, (ITraversal) __.Select<object>("outV")).Option(Merge.InV, (ITraversal) __.Select<object>("inV")), (g,p) =>g.V(), (g,p) =>g.E(), (g,p) =>g.V().Has("name","marko").Out [...]
                {"g_mergeV_mergeE_combination_existing_vertices", new List<Func<GraphTraversalSource, IDictionary<string, object>, ITraversal>> {(g,p) =>g.AddV("person").Property("name","marko").AddV("person").Property("name","vadas"), (g,p) =>g.MergeV((IDictionary<object,object>) p["xx1"]).As("outV").MergeV((IDictionary<object,object>) p["xx2"]).As("inV").MergeE((IDictionary<object,object>) p["xx3"]).Option(Merge.OutV, (ITraversal) __.Select<object>("outV")).Option(Merge.InV, (ITraversal [...]
                {"g_V_asXvX_mergeEXxx1X_optionXMerge_onMatch_xx2X_optionXMerge_outV_selectXvXX_optionXMerge_inV_selectXvXX", new List<Func<GraphTraversalSource, IDictionary<string, object>, ITraversal>> {(g,p) =>g.AddV("person").Property("name","marko").Property("age",29), (g,p) =>g.V().As("v").MergeE((IDictionary<object,object>) p["xx1"]).Option(Merge.OnMatch, (IDictionary<object,object>) p["xx2"]).Option(Merge.OutV, (ITraversal) __.Select<object>("v")).Option(Merge.InV, (ITraversal) __. [...]
-               {"g_V_mergeEXlabel_knows_out_marko_in_vadasX_optionXonMatch_sideEffectXpropertyXweight_0XX_constantXemptyXX", new List<Func<GraphTraversalSource, IDictionary<string, object>, ITraversal>> {(g,p) =>g.AddV("person").Property("name","marko").As("a").AddV("person").Property("name","vadas").As("b").AddE("knows").Property("weight",1).From("a").To("b"), (g,p) =>g.V().MergeE((IDictionary<object,object>) p["xx1"]).Option(Merge.OnMatch, (ITraversal) __.SideEffect(__.Property("weight [...]
+               {"g_V_mergeEXlabel_knows_out_marko_in_vadasX_optionXonMatch_sideEffectXpropertyXweight_0XX_constantXemptyXX", new List<Func<GraphTraversalSource, IDictionary<string, object>, ITraversal>> {(g,p) =>g.AddV("person").Property("name","marko").As("a").AddV("person").Property("name","vadas").As("b").AddE("knows").Property("weight",1).From("a").To("b"), (g,p) =>g.V().MergeE((IDictionary<object,object>) p["xx1"]).Option(Merge.OnMatch, (ITraversal) __.SideEffect(__.Property("weight [...]
                {"g_mergeEXlabel_knows_out_marko_in_vadasX_optionXonMatch_sideEffectXpropertyXweight_0XX_constantXemptyXX", new List<Func<GraphTraversalSource, IDictionary<string, object>, ITraversal>> {(g,p) =>g.AddV("person").Property("name","marko").As("a").AddV("person").Property("name","vadas").As("b").AddE("knows").Property("weight",1).From("a").To("b"), (g,p) =>g.MergeE((IDictionary<object,object>) p["xx1"]).Option(Merge.OnMatch, (ITraversal) __.SideEffect(__.Property("weight",0)). [...]
+               {"g_injectXlist1_list2X_mergeEXlimitXlocal_1XX_optionXonCreate_rangeXlocal_1_2XX_optionXonMatch_tailXlocalXX_to_match", new List<Func<GraphTraversalSource, IDictionary<string, object>, ITraversal>> {(g,p) =>g.AddV("person").Property("name","marko").Property("age",29).As("marko").AddV("person").Property("name","vadas").Property("age",27).As("vadas").AddV("software").Property("name","lop").Property("lang","java").As("lop").AddV("person").Property("name","josh").Property("age [...]
+               {"g_injectXlist1_list2X_mergeEXlimitXlocal_1XX_optionXonCreate_rangeXlocal_1_2XX_optionXonMatch_tailXlocalXX_to_create", new List<Func<GraphTraversalSource, IDictionary<string, object>, ITraversal>> {(g,p) =>g.AddV("person").Property("name","marko").Property("age",29).As("marko").AddV("person").Property("name","vadas").Property("age",27).As("vadas").AddV("software").Property("name","lop").Property("lang","java").As("lop").AddV("person").Property("name","josh").Property("ag [...]
                {"g_mergeVXemptyX_optionXonMatch_nullX", new List<Func<GraphTraversalSource, IDictionary<string, object>, ITraversal>> {(g,p) =>g.AddV("person").Property("name","marko").Property("age",29), (g,p) =>g.MergeV((IDictionary<object,object>) new Dictionary<object,object> {}).Option(Merge.OnMatch, (IDictionary<object,object>) null), (g,p) =>g.V().Has("person","name","marko").Has("age",29)}}, 
                {"g_V_mergeVXemptyX_optionXonMatch_nullX", new List<Func<GraphTraversalSource, IDictionary<string, object>, ITraversal>> {(g,p) =>g.AddV("person").Property("name","marko").Property("age",29), (g,p) =>g.V().MergeV((IDictionary<object,object>) new Dictionary<object,object> {}).Option(Merge.OnMatch, (IDictionary<object,object>) null), (g,p) =>g.V().Has("person","name","marko").Has("age",29)}}, 
                {"g_mergeVXnullX_optionXonCreate_label_null_name_markoX", new List<Func<GraphTraversalSource, IDictionary<string, object>, ITraversal>> {(g,p) =>g.AddV("person").Property("name","marko").Property("age",29), (g,p) =>g.MergeV((IDictionary<object,object>) p["xx1"])}}, 
@@ -725,7 +727,7 @@ namespace Gremlin.Net.IntegrationTest.Gherkin
                {"g_mergeXlabel_person_name_vadasX_optionXonMatch_age_35X", new List<Func<GraphTraversalSource, IDictionary<string, object>, ITraversal>> {(g,p) =>g.AddV("person").Property("name","vadas").Property("age",29).AddV("person").Property("name","vadas").Property("age",27), (g,p) =>g.MergeV((IDictionary<object,object>) p["xx1"]).Option(Merge.OnMatch, (IDictionary<object,object>) p["xx2"]), (g,p) =>g.V().Has("age",35), (g,p) =>g.V()}}, 
                {"g_V_mapXmergeXlabel_person_name_joshXX", new List<Func<GraphTraversalSource, IDictionary<string, object>, ITraversal>> {(g,p) =>g.AddV("person").Property("name","vadas").Property("age",29).AddV("person").Property("name","stephen").Property("age",27), (g,p) =>g.V().Map<object>(__.MergeV((IDictionary<object,object>) p["xx1"])), (g,p) =>g.V().Has("person","name","josh"), (g,p) =>g.V()}}, 
                {"g_withSideEffectXc_label_person_name_markoX_withSideEffectXm_age_19X_mergeVXselectXcXX_optionXonMatch_sideEffectXpropertiesXageX_dropX_selectXmXX_option", new List<Func<GraphTraversalSource, IDictionary<string, object>, ITraversal>> {(g,p) =>g.AddV("person").Property("name","marko").Property(Cardinality.List,"age",29).Property(Cardinality.List,"age",31).Property(Cardinality.List,"age",32), (g,p) =>g.WithSideEffect("c",p["xx1"]).WithSideEffect("m",p["xx2"]).MergeV((ITrave [...]
-               {"g_withSideEffectXm_age_19X_V_hasXperson_name_markoX_mergeVXselectXcXX_optionXonMatch_sideEffectXpropertiesXageX_dropX_selectXmXX_option", new List<Func<GraphTraversalSource, IDictionary<string, object>, ITraversal>> {(g,p) =>g.AddV("person").Property("name","marko").Property(Cardinality.List,"age",29).Property(Cardinality.List,"age",31).Property(Cardinality.List,"age",32), (g,p) =>g.WithSideEffect("m",p["xx1"]).V().Has("person","name","marko").MergeV((IDictionary<object, [...]
+               {"g_withSideEffectXm_age_19X_V_hasXperson_name_markoX_mergeVXselectXcXX_optionXonMatch_sideEffectXpropertiesXageX_dropX_selectXmXX_option", new List<Func<GraphTraversalSource, IDictionary<string, object>, ITraversal>> {(g,p) =>g.AddV("person").Property("name","marko").Property(Cardinality.List,"age",29).Property(Cardinality.List,"age",31).Property(Cardinality.List,"age",32), (g,p) =>g.WithSideEffect("m",p["xx1"]).V().Has("person","name","marko").MergeV((IDictionary<object, [...]
                {"g_mergeV_onCreate_inheritance_existing", new List<Func<GraphTraversalSource, IDictionary<string, object>, ITraversal>> {(g,p) =>g.AddV("person").Property("name","mike").Property(T.Id,"1"), (g,p) =>g.MergeV((IDictionary<object,object>) p["xx1"]).Option(Merge.OnCreate, (IDictionary<object,object>) p["xx2"]), (g,p) =>g.V(), (g,p) =>g.V("1").Has("person","name","mike")}}, 
                {"g_mergeV_onCreate_inheritance_new_1", new List<Func<GraphTraversalSource, IDictionary<string, object>, ITraversal>> {(g,p) =>g.MergeV((IDictionary<object,object>) p["xx1"]).Option(Merge.OnCreate, (IDictionary<object,object>) p["xx2"]), (g,p) =>g.V(), (g,p) =>g.V("1").Has("person","name","mike")}}, 
                {"g_mergeV_onCreate_inheritance_new_2", new List<Func<GraphTraversalSource, IDictionary<string, object>, ITraversal>> {(g,p) =>g.MergeV((IDictionary<object,object>) p["xx1"]).Option(Merge.OnCreate, (IDictionary<object,object>) p["xx2"]), (g,p) =>g.V(), (g,p) =>g.V("1").Has("person","name","mike")}}, 
@@ -740,6 +742,8 @@ namespace Gremlin.Net.IntegrationTest.Gherkin
                {"g_mergeV_hidden_id_key_onMatch_matched_prohibited", new List<Func<GraphTraversalSource, IDictionary<string, object>, ITraversal>> {(g,p) =>g.AddV("vertex"), (g,p) =>g.MergeV((IDictionary<object,object>) new Dictionary<object,object> {}).Option(Merge.OnMatch, (IDictionary<object,object>) p["xx1"])}}, 
                {"g_mergeV_hidden_label_key_matched_onMatch_matched_prohibited", new List<Func<GraphTraversalSource, IDictionary<string, object>, ITraversal>> {(g,p) =>g.AddV("vertex"), (g,p) =>g.MergeV((IDictionary<object,object>) new Dictionary<object,object> {}).Option(Merge.OnMatch, (IDictionary<object,object>) p["xx1"])}}, 
                {"g_mergeV_hidden_label_key_onMatch_matched_prohibited", new List<Func<GraphTraversalSource, IDictionary<string, object>, ITraversal>> {(g,p) =>g.MergeV((IDictionary<object,object>) new Dictionary<object,object> {}).Option(Merge.OnMatch, (IDictionary<object,object>) p["xx1"])}}, 
+               {"g_injectXlist1_list2X_mergeVXlimitXlocal_1XX_optionXonCreate_rangeXlocal_1_2X_optionXonMatch_tailXlocalXX_to_match", new List<Func<GraphTraversalSource, IDictionary<string, object>, ITraversal>> {(g,p) =>g.AddV("person").Property("name","marko").Property("age",29), (g,p) =>g.Inject(p["xx1"],p["xx1"],p["xx2"]).Fold().MergeV((ITraversal) __.Limit<object>(Scope.Local,1)).Option(Merge.OnCreate, (ITraversal) __.Range<object>(Scope.Local,1,2)).Option(Merge.OnMatch, (ITraversal [...]
+               {"g_injectXlist1_list2X_mergeVXlimitXlocal_1XX_optionXonCreate_rangeXlocal_1_2X_optionXonMatch_tailXlocalXX_to_create", new List<Func<GraphTraversalSource, IDictionary<string, object>, ITraversal>> {(g,p) =>g.AddV("person").Property("name","marko").Property("age",29), (g,p) =>g.Inject(p["xx1"],p["xx1"],p["xx2"]).Fold().MergeV((ITraversal) __.Limit<object>(Scope.Local,1)).Option(Merge.OnCreate, (ITraversal) __.Range<object>(Scope.Local,1,2)).Option(Merge.OnMatch, (ITraversa [...]
                {"g_V_age_min", new List<Func<GraphTraversalSource, IDictionary<string, object>, ITraversal>> {(g,p) =>g.V().Values<object>("age").Min<object>()}}, 
                {"g_V_foo_min", new List<Func<GraphTraversalSource, IDictionary<string, object>, ITraversal>> {(g,p) =>g.V().Values<object>("foo").Min<object>()}}, 
                {"g_V_name_min", new List<Func<GraphTraversalSource, IDictionary<string, object>, ITraversal>> {(g,p) =>g.V().Values<object>("name").Min<object>()}}, 
diff --git a/gremlin-go/driver/cucumber/gremlin.go b/gremlin-go/driver/cucumber/gremlin.go
index d1f6fc1493..f67e22056d 100644
--- a/gremlin-go/driver/cucumber/gremlin.go
+++ b/gremlin-go/driver/cucumber/gremlin.go
@@ -660,8 +660,10 @@ var translationMap = map[string][]func(g *gremlingo.GraphTraversalSource, p map[
     "g_mergeV_mergeE_combination_new_vertices": {func(g *gremlingo.GraphTraversalSource, p map[string]interface{}) *gremlingo.GraphTraversal {return g.MergeV(p["xx1"]).As("outV").MergeV(p["xx2"]).As("inV").MergeE(p["xx3"]).Option(gremlingo.Merge.OutV, gremlingo.T__.Select("outV")).Option(gremlingo.Merge.InV, gremlingo.T__.Select("inV"))}, func(g *gremlingo.GraphTraversalSource, p map[string]interface{}) *gremlingo.GraphTraversal {return g.V()}, func(g *gremlingo.GraphTraversalSource, p m [...]
     "g_mergeV_mergeE_combination_existing_vertices": {func(g *gremlingo.GraphTraversalSource, p map[string]interface{}) *gremlingo.GraphTraversal {return g.AddV("person").Property("name", "marko").AddV("person").Property("name", "vadas")}, func(g *gremlingo.GraphTraversalSource, p map[string]interface{}) *gremlingo.GraphTraversal {return g.MergeV(p["xx1"]).As("outV").MergeV(p["xx2"]).As("inV").MergeE(p["xx3"]).Option(gremlingo.Merge.OutV, gremlingo.T__.Select("outV")).Option(gremlingo.Me [...]
     "g_V_asXvX_mergeEXxx1X_optionXMerge_onMatch_xx2X_optionXMerge_outV_selectXvXX_optionXMerge_inV_selectXvXX": {func(g *gremlingo.GraphTraversalSource, p map[string]interface{}) *gremlingo.GraphTraversal {return g.AddV("person").Property("name", "marko").Property("age", 29)}, func(g *gremlingo.GraphTraversalSource, p map[string]interface{}) *gremlingo.GraphTraversal {return g.V().As("v").MergeE(p["xx1"]).Option(gremlingo.Merge.OnMatch, p["xx2"]).Option(gremlingo.Merge.OutV, gremlingo.T_ [...]
-    "g_V_mergeEXlabel_knows_out_marko_in_vadasX_optionXonMatch_sideEffectXpropertyXweight_0XX_constantXemptyXX": {func(g *gremlingo.GraphTraversalSource, p map[string]interface{}) *gremlingo.GraphTraversal {return g.AddV("person").Property("name", "marko").As("a").AddV("person").Property("name", "vadas").As("b").AddE("knows").Property("weight", 1).From("a").To("b")}, func(g *gremlingo.GraphTraversalSource, p map[string]interface{}) *gremlingo.GraphTraversal {return g.V().MergeE(p["xx1"]) [...]
+    "g_V_mergeEXlabel_knows_out_marko_in_vadasX_optionXonMatch_sideEffectXpropertyXweight_0XX_constantXemptyXX": {func(g *gremlingo.GraphTraversalSource, p map[string]interface{}) *gremlingo.GraphTraversal {return g.AddV("person").Property("name", "marko").As("a").AddV("person").Property("name", "vadas").As("b").AddE("knows").Property("weight", 1).From("a").To("b")}, func(g *gremlingo.GraphTraversalSource, p map[string]interface{}) *gremlingo.GraphTraversal {return g.V().MergeE(p["xx1"]) [...]
     "g_mergeEXlabel_knows_out_marko_in_vadasX_optionXonMatch_sideEffectXpropertyXweight_0XX_constantXemptyXX": {func(g *gremlingo.GraphTraversalSource, p map[string]interface{}) *gremlingo.GraphTraversal {return g.AddV("person").Property("name", "marko").As("a").AddV("person").Property("name", "vadas").As("b").AddE("knows").Property("weight", 1).From("a").To("b")}, func(g *gremlingo.GraphTraversalSource, p map[string]interface{}) *gremlingo.GraphTraversal {return g.MergeE(p["xx1"]).Optio [...]
+    "g_injectXlist1_list2X_mergeEXlimitXlocal_1XX_optionXonCreate_rangeXlocal_1_2XX_optionXonMatch_tailXlocalXX_to_match": {func(g *gremlingo.GraphTraversalSource, p map[string]interface{}) *gremlingo.GraphTraversal {return g.AddV("person").Property("name", "marko").Property("age", 29).As("marko").AddV("person").Property("name", "vadas").Property("age", 27).As("vadas").AddV("software").Property("name", "lop").Property("lang", "java").As("lop").AddV("person").Property("name", "josh").Prop [...]
+    "g_injectXlist1_list2X_mergeEXlimitXlocal_1XX_optionXonCreate_rangeXlocal_1_2XX_optionXonMatch_tailXlocalXX_to_create": {func(g *gremlingo.GraphTraversalSource, p map[string]interface{}) *gremlingo.GraphTraversal {return g.AddV("person").Property("name", "marko").Property("age", 29).As("marko").AddV("person").Property("name", "vadas").Property("age", 27).As("vadas").AddV("software").Property("name", "lop").Property("lang", "java").As("lop").AddV("person").Property("name", "josh").Pro [...]
     "g_mergeVXemptyX_optionXonMatch_nullX": {func(g *gremlingo.GraphTraversalSource, p map[string]interface{}) *gremlingo.GraphTraversal {return g.AddV("person").Property("name", "marko").Property("age", 29)}, func(g *gremlingo.GraphTraversalSource, p map[string]interface{}) *gremlingo.GraphTraversal {return g.MergeV(map[interface{}]interface{}{}).Option(gremlingo.Merge.OnMatch, nil)}, func(g *gremlingo.GraphTraversalSource, p map[string]interface{}) *gremlingo.GraphTraversal {return g.V [...]
     "g_V_mergeVXemptyX_optionXonMatch_nullX": {func(g *gremlingo.GraphTraversalSource, p map[string]interface{}) *gremlingo.GraphTraversal {return g.AddV("person").Property("name", "marko").Property("age", 29)}, func(g *gremlingo.GraphTraversalSource, p map[string]interface{}) *gremlingo.GraphTraversal {return g.V().MergeV(map[interface{}]interface{}{}).Option(gremlingo.Merge.OnMatch, nil)}, func(g *gremlingo.GraphTraversalSource, p map[string]interface{}) *gremlingo.GraphTraversal {retu [...]
     "g_mergeVXnullX_optionXonCreate_label_null_name_markoX": {func(g *gremlingo.GraphTraversalSource, p map[string]interface{}) *gremlingo.GraphTraversal {return g.AddV("person").Property("name", "marko").Property("age", 29)}, func(g *gremlingo.GraphTraversalSource, p map[string]interface{}) *gremlingo.GraphTraversal {return g.MergeV(p["xx1"])}}, 
@@ -696,7 +698,7 @@ var translationMap = map[string][]func(g *gremlingo.GraphTraversalSource, p map[
     "g_mergeXlabel_person_name_vadasX_optionXonMatch_age_35X": {func(g *gremlingo.GraphTraversalSource, p map[string]interface{}) *gremlingo.GraphTraversal {return g.AddV("person").Property("name", "vadas").Property("age", 29).AddV("person").Property("name", "vadas").Property("age", 27)}, func(g *gremlingo.GraphTraversalSource, p map[string]interface{}) *gremlingo.GraphTraversal {return g.MergeV(p["xx1"]).Option(gremlingo.Merge.OnMatch, p["xx2"])}, func(g *gremlingo.GraphTraversalSource, [...]
     "g_V_mapXmergeXlabel_person_name_joshXX": {func(g *gremlingo.GraphTraversalSource, p map[string]interface{}) *gremlingo.GraphTraversal {return g.AddV("person").Property("name", "vadas").Property("age", 29).AddV("person").Property("name", "stephen").Property("age", 27)}, func(g *gremlingo.GraphTraversalSource, p map[string]interface{}) *gremlingo.GraphTraversal {return g.V().Map(gremlingo.T__.MergeV(p["xx1"]))}, func(g *gremlingo.GraphTraversalSource, p map[string]interface{}) *gremli [...]
     "g_withSideEffectXc_label_person_name_markoX_withSideEffectXm_age_19X_mergeVXselectXcXX_optionXonMatch_sideEffectXpropertiesXageX_dropX_selectXmXX_option": {func(g *gremlingo.GraphTraversalSource, p map[string]interface{}) *gremlingo.GraphTraversal {return g.AddV("person").Property("name", "marko").Property(gremlingo.Cardinality.List, "age", 29).Property(gremlingo.Cardinality.List, "age", 31).Property(gremlingo.Cardinality.List, "age", 32)}, func(g *gremlingo.GraphTraversalSource, p  [...]
-    "g_withSideEffectXm_age_19X_V_hasXperson_name_markoX_mergeVXselectXcXX_optionXonMatch_sideEffectXpropertiesXageX_dropX_selectXmXX_option": {func(g *gremlingo.GraphTraversalSource, p map[string]interface{}) *gremlingo.GraphTraversal {return g.AddV("person").Property("name", "marko").Property(gremlingo.Cardinality.List, "age", 29).Property(gremlingo.Cardinality.List, "age", 31).Property(gremlingo.Cardinality.List, "age", 32)}, func(g *gremlingo.GraphTraversalSource, p map[string]interf [...]
+    "g_withSideEffectXm_age_19X_V_hasXperson_name_markoX_mergeVXselectXcXX_optionXonMatch_sideEffectXpropertiesXageX_dropX_selectXmXX_option": {func(g *gremlingo.GraphTraversalSource, p map[string]interface{}) *gremlingo.GraphTraversal {return g.AddV("person").Property("name", "marko").Property(gremlingo.Cardinality.List, "age", 29).Property(gremlingo.Cardinality.List, "age", 31).Property(gremlingo.Cardinality.List, "age", 32)}, func(g *gremlingo.GraphTraversalSource, p map[string]interf [...]
     "g_mergeV_onCreate_inheritance_existing": {func(g *gremlingo.GraphTraversalSource, p map[string]interface{}) *gremlingo.GraphTraversal {return g.AddV("person").Property("name", "mike").Property(gremlingo.T.Id, "1")}, func(g *gremlingo.GraphTraversalSource, p map[string]interface{}) *gremlingo.GraphTraversal {return g.MergeV(p["xx1"]).Option(gremlingo.Merge.OnCreate, p["xx2"])}, func(g *gremlingo.GraphTraversalSource, p map[string]interface{}) *gremlingo.GraphTraversal {return g.V()}, [...]
     "g_mergeV_onCreate_inheritance_new_1": {func(g *gremlingo.GraphTraversalSource, p map[string]interface{}) *gremlingo.GraphTraversal {return g.MergeV(p["xx1"]).Option(gremlingo.Merge.OnCreate, p["xx2"])}, func(g *gremlingo.GraphTraversalSource, p map[string]interface{}) *gremlingo.GraphTraversal {return g.V()}, func(g *gremlingo.GraphTraversalSource, p map[string]interface{}) *gremlingo.GraphTraversal {return g.V("1").Has("person", "name", "mike")}}, 
     "g_mergeV_onCreate_inheritance_new_2": {func(g *gremlingo.GraphTraversalSource, p map[string]interface{}) *gremlingo.GraphTraversal {return g.MergeV(p["xx1"]).Option(gremlingo.Merge.OnCreate, p["xx2"])}, func(g *gremlingo.GraphTraversalSource, p map[string]interface{}) *gremlingo.GraphTraversal {return g.V()}, func(g *gremlingo.GraphTraversalSource, p map[string]interface{}) *gremlingo.GraphTraversal {return g.V("1").Has("person", "name", "mike")}}, 
@@ -711,6 +713,8 @@ var translationMap = map[string][]func(g *gremlingo.GraphTraversalSource, p map[
     "g_mergeV_hidden_id_key_onMatch_matched_prohibited": {func(g *gremlingo.GraphTraversalSource, p map[string]interface{}) *gremlingo.GraphTraversal {return g.AddV("vertex")}, func(g *gremlingo.GraphTraversalSource, p map[string]interface{}) *gremlingo.GraphTraversal {return g.MergeV(map[interface{}]interface{}{}).Option(gremlingo.Merge.OnMatch, p["xx1"])}}, 
     "g_mergeV_hidden_label_key_matched_onMatch_matched_prohibited": {func(g *gremlingo.GraphTraversalSource, p map[string]interface{}) *gremlingo.GraphTraversal {return g.AddV("vertex")}, func(g *gremlingo.GraphTraversalSource, p map[string]interface{}) *gremlingo.GraphTraversal {return g.MergeV(map[interface{}]interface{}{}).Option(gremlingo.Merge.OnMatch, p["xx1"])}}, 
     "g_mergeV_hidden_label_key_onMatch_matched_prohibited": {func(g *gremlingo.GraphTraversalSource, p map[string]interface{}) *gremlingo.GraphTraversal {return g.MergeV(map[interface{}]interface{}{}).Option(gremlingo.Merge.OnMatch, p["xx1"])}}, 
+    "g_injectXlist1_list2X_mergeVXlimitXlocal_1XX_optionXonCreate_rangeXlocal_1_2X_optionXonMatch_tailXlocalXX_to_match": {func(g *gremlingo.GraphTraversalSource, p map[string]interface{}) *gremlingo.GraphTraversal {return g.AddV("person").Property("name", "marko").Property("age", 29)}, func(g *gremlingo.GraphTraversalSource, p map[string]interface{}) *gremlingo.GraphTraversal {return g.Inject(p["xx1"], p["xx1"], p["xx2"]).Fold().MergeV(gremlingo.T__.Limit(gremlingo.Scope.Local, 1)).Opti [...]
+    "g_injectXlist1_list2X_mergeVXlimitXlocal_1XX_optionXonCreate_rangeXlocal_1_2X_optionXonMatch_tailXlocalXX_to_create": {func(g *gremlingo.GraphTraversalSource, p map[string]interface{}) *gremlingo.GraphTraversal {return g.AddV("person").Property("name", "marko").Property("age", 29)}, func(g *gremlingo.GraphTraversalSource, p map[string]interface{}) *gremlingo.GraphTraversal {return g.Inject(p["xx1"], p["xx1"], p["xx2"]).Fold().MergeV(gremlingo.T__.Limit(gremlingo.Scope.Local, 1)).Opt [...]
     "g_V_age_min": {func(g *gremlingo.GraphTraversalSource, p map[string]interface{}) *gremlingo.GraphTraversal {return g.V().Values("age").Min()}}, 
     "g_V_foo_min": {func(g *gremlingo.GraphTraversalSource, p map[string]interface{}) *gremlingo.GraphTraversal {return g.V().Values("foo").Min()}}, 
     "g_V_name_min": {func(g *gremlingo.GraphTraversalSource, p map[string]interface{}) *gremlingo.GraphTraversal {return g.V().Values("name").Min()}}, 
diff --git a/gremlin-javascript/src/main/javascript/gremlin-javascript/test/cucumber/gremlin.js b/gremlin-javascript/src/main/javascript/gremlin-javascript/test/cucumber/gremlin.js
index 479575d5fc..b82c018dee 100644
--- a/gremlin-javascript/src/main/javascript/gremlin-javascript/test/cucumber/gremlin.js
+++ b/gremlin-javascript/src/main/javascript/gremlin-javascript/test/cucumber/gremlin.js
@@ -679,8 +679,10 @@ const gremlins = {
     g_mergeV_mergeE_combination_new_vertices: [function({g, xx1, xx3, xx2}) { return g.mergeV(xx1).as("outV").mergeV(xx2).as("inV").mergeE(xx3).option(Merge.outV,__.select("outV")).option(Merge.inV,__.select("inV")) }, function({g, xx1, xx3, xx2}) { return g.V() }, function({g, xx1, xx3, xx2}) { return g.E() }, function({g, xx1, xx3, xx2}) { return g.V().has("name","marko").out("knows").has("name","vadas") }], 
     g_mergeV_mergeE_combination_existing_vertices: [function({g, xx1, xx3, xx2}) { return g.addV("person").property("name","marko").addV("person").property("name","vadas") }, function({g, xx1, xx3, xx2}) { return g.mergeV(xx1).as("outV").mergeV(xx2).as("inV").mergeE(xx3).option(Merge.outV,__.select("outV")).option(Merge.inV,__.select("inV")) }, function({g, xx1, xx3, xx2}) { return g.V() }, function({g, xx1, xx3, xx2}) { return g.E() }, function({g, xx1, xx3, xx2}) { return g.V().has("na [...]
     g_V_asXvX_mergeEXxx1X_optionXMerge_onMatch_xx2X_optionXMerge_outV_selectXvXX_optionXMerge_inV_selectXvXX: [function({g, xx1, xx2}) { return g.addV("person").property("name","marko").property("age",29) }, function({g, xx1, xx2}) { return g.V().as("v").mergeE(xx1).option(Merge.onMatch,xx2).option(Merge.outV,__.select("v")).option(Merge.inV,__.select("v")) }], 
-    g_V_mergeEXlabel_knows_out_marko_in_vadasX_optionXonMatch_sideEffectXpropertyXweight_0XX_constantXemptyXX: [function({g, xx1}) { return g.addV("person").property("name","marko").as("a").addV("person").property("name","vadas").as("b").addE("knows").property("weight",1).from_("a").to("b") }, function({g, xx1}) { return g.V().mergeE(xx1).option(Merge.onMatch,__.sideEffect(__.property("weight",0)).constant(new Map([]))) }, function({g, xx1}) { return g.V() }, function({g, xx1}) { return  [...]
+    g_V_mergeEXlabel_knows_out_marko_in_vadasX_optionXonMatch_sideEffectXpropertyXweight_0XX_constantXemptyXX: [function({g, xx1}) { return g.addV("person").property("name","marko").as("a").addV("person").property("name","vadas").as("b").addE("knows").property("weight",1).from_("a").to("b") }, function({g, xx1}) { return g.V().mergeE(xx1).option(Merge.onMatch,__.sideEffect(__.property("weight",0)).constant(new Map([]))) }], 
     g_mergeEXlabel_knows_out_marko_in_vadasX_optionXonMatch_sideEffectXpropertyXweight_0XX_constantXemptyXX: [function({g, xx1}) { return g.addV("person").property("name","marko").as("a").addV("person").property("name","vadas").as("b").addE("knows").property("weight",1).from_("a").to("b") }, function({g, xx1}) { return g.mergeE(xx1).option(Merge.onMatch,__.sideEffect(__.property("weight",0)).constant(new Map([]))) }, function({g, xx1}) { return g.V() }, function({g, xx1}) { return g.E(). [...]
+    g_injectXlist1_list2X_mergeEXlimitXlocal_1XX_optionXonCreate_rangeXlocal_1_2XX_optionXonMatch_tailXlocalXX_to_match: [function({g, xx1, xx2}) { return g.addV("person").property("name","marko").property("age",29).as("marko").addV("person").property("name","vadas").property("age",27).as("vadas").addV("software").property("name","lop").property("lang","java").as("lop").addV("person").property("name","josh").property("age",32).as("josh").addV("software").property("name","ripple").propert [...]
+    g_injectXlist1_list2X_mergeEXlimitXlocal_1XX_optionXonCreate_rangeXlocal_1_2XX_optionXonMatch_tailXlocalXX_to_create: [function({g, xx1, xx2}) { return g.addV("person").property("name","marko").property("age",29).as("marko").addV("person").property("name","vadas").property("age",27).as("vadas").addV("software").property("name","lop").property("lang","java").as("lop").addV("person").property("name","josh").property("age",32).as("josh").addV("software").property("name","ripple").proper [...]
     g_mergeVXemptyX_optionXonMatch_nullX: [function({g}) { return g.addV("person").property("name","marko").property("age",29) }, function({g}) { return g.mergeV(new Map([])).option(Merge.onMatch,null) }, function({g}) { return g.V().has("person","name","marko").has("age",29) }], 
     g_V_mergeVXemptyX_optionXonMatch_nullX: [function({g}) { return g.addV("person").property("name","marko").property("age",29) }, function({g}) { return g.V().mergeV(new Map([])).option(Merge.onMatch,null) }, function({g}) { return g.V().has("person","name","marko").has("age",29) }], 
     g_mergeVXnullX_optionXonCreate_label_null_name_markoX: [function({g, xx1}) { return g.addV("person").property("name","marko").property("age",29) }, function({g, xx1}) { return g.mergeV(xx1) }], 
@@ -715,7 +717,7 @@ const gremlins = {
     g_mergeXlabel_person_name_vadasX_optionXonMatch_age_35X: [function({g, xx1, xx2}) { return g.addV("person").property("name","vadas").property("age",29).addV("person").property("name","vadas").property("age",27) }, function({g, xx1, xx2}) { return g.mergeV(xx1).option(Merge.onMatch,xx2) }, function({g, xx1, xx2}) { return g.V().has("age",35) }, function({g, xx1, xx2}) { return g.V() }], 
     g_V_mapXmergeXlabel_person_name_joshXX: [function({g, xx1}) { return g.addV("person").property("name","vadas").property("age",29).addV("person").property("name","stephen").property("age",27) }, function({g, xx1}) { return g.V().map(__.mergeV(xx1)) }, function({g, xx1}) { return g.V().has("person","name","josh") }, function({g, xx1}) { return g.V() }], 
     g_withSideEffectXc_label_person_name_markoX_withSideEffectXm_age_19X_mergeVXselectXcXX_optionXonMatch_sideEffectXpropertiesXageX_dropX_selectXmXX_option: [function({g, xx1, xx2}) { return g.addV("person").property("name","marko").property(Cardinality.list,"age",29).property(Cardinality.list,"age",31).property(Cardinality.list,"age",32) }, function({g, xx1, xx2}) { return g.withSideEffect("c",xx1).withSideEffect("m",xx2).mergeV(__.select("c")).option(Merge.onMatch,__.sideEffect(__.pro [...]
-    g_withSideEffectXm_age_19X_V_hasXperson_name_markoX_mergeVXselectXcXX_optionXonMatch_sideEffectXpropertiesXageX_dropX_selectXmXX_option: [function({g, xx1}) { return g.addV("person").property("name","marko").property(Cardinality.list,"age",29).property(Cardinality.list,"age",31).property(Cardinality.list,"age",32) }, function({g, xx1}) { return g.withSideEffect("m",xx1).V().has("person","name","marko").mergeV(new Map([])).option(Merge.onMatch,__.sideEffect(__.properties("age").drop() [...]
+    g_withSideEffectXm_age_19X_V_hasXperson_name_markoX_mergeVXselectXcXX_optionXonMatch_sideEffectXpropertiesXageX_dropX_selectXmXX_option: [function({g, xx1}) { return g.addV("person").property("name","marko").property(Cardinality.list,"age",29).property(Cardinality.list,"age",31).property(Cardinality.list,"age",32) }, function({g, xx1}) { return g.withSideEffect("m",xx1).V().has("person","name","marko").mergeV(new Map([])).option(Merge.onMatch,__.sideEffect(__.properties("age").drop() [...]
     g_mergeV_onCreate_inheritance_existing: [function({g, xx1, xx2}) { return g.addV("person").property("name","mike").property(T.id,"1") }, function({g, xx1, xx2}) { return g.mergeV(xx1).option(Merge.onCreate,xx2) }, function({g, xx1, xx2}) { return g.V() }, function({g, xx1, xx2}) { return g.V("1").has("person","name","mike") }], 
     g_mergeV_onCreate_inheritance_new_1: [function({g, xx1, xx2}) { return g.mergeV(xx1).option(Merge.onCreate,xx2) }, function({g, xx1, xx2}) { return g.V() }, function({g, xx1, xx2}) { return g.V("1").has("person","name","mike") }], 
     g_mergeV_onCreate_inheritance_new_2: [function({g, xx1, xx2}) { return g.mergeV(xx1).option(Merge.onCreate,xx2) }, function({g, xx1, xx2}) { return g.V() }, function({g, xx1, xx2}) { return g.V("1").has("person","name","mike") }], 
@@ -730,6 +732,8 @@ const gremlins = {
     g_mergeV_hidden_id_key_onMatch_matched_prohibited: [function({g, xx1}) { return g.addV("vertex") }, function({g, xx1}) { return g.mergeV(new Map([])).option(Merge.onMatch,xx1) }], 
     g_mergeV_hidden_label_key_matched_onMatch_matched_prohibited: [function({g, xx1}) { return g.addV("vertex") }, function({g, xx1}) { return g.mergeV(new Map([])).option(Merge.onMatch,xx1) }], 
     g_mergeV_hidden_label_key_onMatch_matched_prohibited: [function({g, xx1}) { return g.mergeV(new Map([])).option(Merge.onMatch,xx1) }], 
+    g_injectXlist1_list2X_mergeVXlimitXlocal_1XX_optionXonCreate_rangeXlocal_1_2X_optionXonMatch_tailXlocalXX_to_match: [function({g, xx1, xx2}) { return g.addV("person").property("name","marko").property("age",29) }, function({g, xx1, xx2}) { return g.inject(xx1,xx1,xx2).fold().mergeV(__.limit(Scope.local,1)).option(Merge.onCreate,__.range(Scope.local,1,2)).option(Merge.onMatch,__.tail(Scope.local)) }, function({g, xx1, xx2}) { return g.V().has("person","name","marko").has("created","N" [...]
+    g_injectXlist1_list2X_mergeVXlimitXlocal_1XX_optionXonCreate_rangeXlocal_1_2X_optionXonMatch_tailXlocalXX_to_create: [function({g, xx1, xx2}) { return g.addV("person").property("name","marko").property("age",29) }, function({g, xx1, xx2}) { return g.inject(xx1,xx1,xx2).fold().mergeV(__.limit(Scope.local,1)).option(Merge.onCreate,__.range(Scope.local,1,2)).option(Merge.onMatch,__.tail(Scope.local)) }, function({g, xx1, xx2}) { return g.V().has("person","name","stephen").hasNot("create [...]
     g_V_age_min: [function({g}) { return g.V().values("age").min() }], 
     g_V_foo_min: [function({g}) { return g.V().values("foo").min() }], 
     g_V_name_min: [function({g}) { return g.V().values("name").min() }], 
diff --git a/gremlin-python/src/main/python/radish/gremlin.py b/gremlin-python/src/main/python/radish/gremlin.py
index 448114d306..5d0e7b78bf 100644
--- a/gremlin-python/src/main/python/radish/gremlin.py
+++ b/gremlin-python/src/main/python/radish/gremlin.py
@@ -661,8 +661,10 @@ world.gremlins = {
     'g_mergeV_mergeE_combination_new_vertices': [(lambda g, xx1=None,xx3=None,xx2=None:g.merge_v(xx1).as_('outV').merge_v(xx2).as_('inV').merge_e(xx3).option(Merge.out_v,__.select('outV')).option(Merge.in_v,__.select('inV'))), (lambda g, xx1=None,xx3=None,xx2=None:g.V()), (lambda g, xx1=None,xx3=None,xx2=None:g.E()), (lambda g, xx1=None,xx3=None,xx2=None:g.V().has('name','marko').out('knows').has('name','vadas'))], 
     'g_mergeV_mergeE_combination_existing_vertices': [(lambda g, xx1=None,xx3=None,xx2=None:g.addV('person').property('name','marko').addV('person').property('name','vadas')), (lambda g, xx1=None,xx3=None,xx2=None:g.merge_v(xx1).as_('outV').merge_v(xx2).as_('inV').merge_e(xx3).option(Merge.out_v,__.select('outV')).option(Merge.in_v,__.select('inV'))), (lambda g, xx1=None,xx3=None,xx2=None:g.V()), (lambda g, xx1=None,xx3=None,xx2=None:g.E()), (lambda g, xx1=None,xx3=None,xx2=None:g.V().ha [...]
     'g_V_asXvX_mergeEXxx1X_optionXMerge_onMatch_xx2X_optionXMerge_outV_selectXvXX_optionXMerge_inV_selectXvXX': [(lambda g, xx1=None,xx2=None:g.addV('person').property('name','marko').property('age',29)), (lambda g, xx1=None,xx2=None:g.V().as_('v').merge_e(xx1).option(Merge.on_match,xx2).option(Merge.out_v,__.select('v')).option(Merge.in_v,__.select('v')))], 
-    'g_V_mergeEXlabel_knows_out_marko_in_vadasX_optionXonMatch_sideEffectXpropertyXweight_0XX_constantXemptyXX': [(lambda g, xx1=None:g.addV('person').property('name','marko').as_('a').addV('person').property('name','vadas').as_('b').addE('knows').property('weight',1).from_('a').to('b')), (lambda g, xx1=None:g.V().merge_e(xx1).option(Merge.on_match,__.sideEffect(__.property('weight',0)).constant({}))), (lambda g, xx1=None:g.V()), (lambda g, xx1=None:g.E().hasLabel('knows').has('weight',1 [...]
+    'g_V_mergeEXlabel_knows_out_marko_in_vadasX_optionXonMatch_sideEffectXpropertyXweight_0XX_constantXemptyXX': [(lambda g, xx1=None:g.addV('person').property('name','marko').as_('a').addV('person').property('name','vadas').as_('b').addE('knows').property('weight',1).from_('a').to('b')), (lambda g, xx1=None:g.V().merge_e(xx1).option(Merge.on_match,__.sideEffect(__.property('weight',0)).constant({})))], 
     'g_mergeEXlabel_knows_out_marko_in_vadasX_optionXonMatch_sideEffectXpropertyXweight_0XX_constantXemptyXX': [(lambda g, xx1=None:g.addV('person').property('name','marko').as_('a').addV('person').property('name','vadas').as_('b').addE('knows').property('weight',1).from_('a').to('b')), (lambda g, xx1=None:g.merge_e(xx1).option(Merge.on_match,__.sideEffect(__.property('weight',0)).constant({}))), (lambda g, xx1=None:g.V()), (lambda g, xx1=None:g.E().hasLabel('knows').has('weight',1)), (l [...]
+    'g_injectXlist1_list2X_mergeEXlimitXlocal_1XX_optionXonCreate_rangeXlocal_1_2XX_optionXonMatch_tailXlocalXX_to_match': [(lambda g, xx1=None,xx2=None:g.addV('person').property('name','marko').property('age',29).as_('marko').addV('person').property('name','vadas').property('age',27).as_('vadas').addV('software').property('name','lop').property('lang','java').as_('lop').addV('person').property('name','josh').property('age',32).as_('josh').addV('software').property('name','ripple').prope [...]
+    'g_injectXlist1_list2X_mergeEXlimitXlocal_1XX_optionXonCreate_rangeXlocal_1_2XX_optionXonMatch_tailXlocalXX_to_create': [(lambda g, xx1=None,xx2=None:g.addV('person').property('name','marko').property('age',29).as_('marko').addV('person').property('name','vadas').property('age',27).as_('vadas').addV('software').property('name','lop').property('lang','java').as_('lop').addV('person').property('name','josh').property('age',32).as_('josh').addV('software').property('name','ripple').prop [...]
     'g_mergeVXemptyX_optionXonMatch_nullX': [(lambda g:g.addV('person').property('name','marko').property('age',29)), (lambda g:g.merge_v({}).option(Merge.on_match,None)), (lambda g:g.V().has('person','name','marko').has('age',29))], 
     'g_V_mergeVXemptyX_optionXonMatch_nullX': [(lambda g:g.addV('person').property('name','marko').property('age',29)), (lambda g:g.V().merge_v({}).option(Merge.on_match,None)), (lambda g:g.V().has('person','name','marko').has('age',29))], 
     'g_mergeVXnullX_optionXonCreate_label_null_name_markoX': [(lambda g, xx1=None:g.addV('person').property('name','marko').property('age',29)), (lambda g, xx1=None:g.merge_v(xx1))], 
@@ -697,7 +699,7 @@ world.gremlins = {
     'g_mergeXlabel_person_name_vadasX_optionXonMatch_age_35X': [(lambda g, xx1=None,xx2=None:g.addV('person').property('name','vadas').property('age',29).addV('person').property('name','vadas').property('age',27)), (lambda g, xx1=None,xx2=None:g.merge_v(xx1).option(Merge.on_match,xx2)), (lambda g, xx1=None,xx2=None:g.V().has('age',35)), (lambda g, xx1=None,xx2=None:g.V())], 
     'g_V_mapXmergeXlabel_person_name_joshXX': [(lambda g, xx1=None:g.addV('person').property('name','vadas').property('age',29).addV('person').property('name','stephen').property('age',27)), (lambda g, xx1=None:g.V().map(__.merge_v(xx1))), (lambda g, xx1=None:g.V().has('person','name','josh')), (lambda g, xx1=None:g.V())], 
     'g_withSideEffectXc_label_person_name_markoX_withSideEffectXm_age_19X_mergeVXselectXcXX_optionXonMatch_sideEffectXpropertiesXageX_dropX_selectXmXX_option': [(lambda g, xx1=None,xx2=None:g.addV('person').property('name','marko').property(Cardinality.list_,'age',29).property(Cardinality.list_,'age',31).property(Cardinality.list_,'age',32)), (lambda g, xx1=None,xx2=None:g.withSideEffect('c',xx1).withSideEffect('m',xx2).merge_v(__.select('c')).option(Merge.on_match,__.sideEffect(__.prope [...]
-    'g_withSideEffectXm_age_19X_V_hasXperson_name_markoX_mergeVXselectXcXX_optionXonMatch_sideEffectXpropertiesXageX_dropX_selectXmXX_option': [(lambda g, xx1=None:g.addV('person').property('name','marko').property(Cardinality.list_,'age',29).property(Cardinality.list_,'age',31).property(Cardinality.list_,'age',32)), (lambda g, xx1=None:g.withSideEffect('m',xx1).V().has('person','name','marko').merge_v({}).option(Merge.on_match,__.sideEffect(__.properties('age').drop()).select('m'))), (l [...]
+    'g_withSideEffectXm_age_19X_V_hasXperson_name_markoX_mergeVXselectXcXX_optionXonMatch_sideEffectXpropertiesXageX_dropX_selectXmXX_option': [(lambda g, xx1=None:g.addV('person').property('name','marko').property(Cardinality.list_,'age',29).property(Cardinality.list_,'age',31).property(Cardinality.list_,'age',32)), (lambda g, xx1=None:g.withSideEffect('m',xx1).V().has('person','name','marko').merge_v({}).option(Merge.on_match,__.sideEffect(__.properties('age').drop()).select('m')))], 
     'g_mergeV_onCreate_inheritance_existing': [(lambda g, xx1=None,xx2=None:g.addV('person').property('name','mike').property(T.id_,'1')), (lambda g, xx1=None,xx2=None:g.merge_v(xx1).option(Merge.on_create,xx2)), (lambda g, xx1=None,xx2=None:g.V()), (lambda g, xx1=None,xx2=None:g.V('1').has('person','name','mike'))], 
     'g_mergeV_onCreate_inheritance_new_1': [(lambda g, xx1=None,xx2=None:g.merge_v(xx1).option(Merge.on_create,xx2)), (lambda g, xx1=None,xx2=None:g.V()), (lambda g, xx1=None,xx2=None:g.V('1').has('person','name','mike'))], 
     'g_mergeV_onCreate_inheritance_new_2': [(lambda g, xx1=None,xx2=None:g.merge_v(xx1).option(Merge.on_create,xx2)), (lambda g, xx1=None,xx2=None:g.V()), (lambda g, xx1=None,xx2=None:g.V('1').has('person','name','mike'))], 
@@ -712,6 +714,8 @@ world.gremlins = {
     'g_mergeV_hidden_id_key_onMatch_matched_prohibited': [(lambda g, xx1=None:g.addV('vertex')), (lambda g, xx1=None:g.merge_v({}).option(Merge.on_match,xx1))], 
     'g_mergeV_hidden_label_key_matched_onMatch_matched_prohibited': [(lambda g, xx1=None:g.addV('vertex')), (lambda g, xx1=None:g.merge_v({}).option(Merge.on_match,xx1))], 
     'g_mergeV_hidden_label_key_onMatch_matched_prohibited': [(lambda g, xx1=None:g.merge_v({}).option(Merge.on_match,xx1))], 
+    'g_injectXlist1_list2X_mergeVXlimitXlocal_1XX_optionXonCreate_rangeXlocal_1_2X_optionXonMatch_tailXlocalXX_to_match': [(lambda g, xx1=None,xx2=None:g.addV('person').property('name','marko').property('age',29)), (lambda g, xx1=None,xx2=None:g.inject(xx1,xx1,xx2).fold().merge_v(__.limit(Scope.local,1)).option(Merge.on_create,__.range_(Scope.local,1,2)).option(Merge.on_match,__.tail(Scope.local))), (lambda g, xx1=None,xx2=None:g.V().has('person','name','marko').has('created','N')), (lam [...]
+    'g_injectXlist1_list2X_mergeVXlimitXlocal_1XX_optionXonCreate_rangeXlocal_1_2X_optionXonMatch_tailXlocalXX_to_create': [(lambda g, xx1=None,xx2=None:g.addV('person').property('name','marko').property('age',29)), (lambda g, xx1=None,xx2=None:g.inject(xx1,xx1,xx2).fold().merge_v(__.limit(Scope.local,1)).option(Merge.on_create,__.range_(Scope.local,1,2)).option(Merge.on_match,__.tail(Scope.local))), (lambda g, xx1=None,xx2=None:g.V().has('person','name','stephen').hasNot('created')), (l [...]
     'g_V_age_min': [(lambda g:g.V().age.min_())], 
     'g_V_foo_min': [(lambda g:g.V().foo.min_())], 
     'g_V_name_min': [(lambda g:g.V().name.min_())], 
diff --git a/gremlin-test/src/main/resources/org/apache/tinkerpop/gremlin/test/features/map/MergeEdge.feature b/gremlin-test/src/main/resources/org/apache/tinkerpop/gremlin/test/features/map/MergeEdge.feature
index 6186d68f58..6991799668 100644
--- a/gremlin-test/src/main/resources/org/apache/tinkerpop/gremlin/test/features/map/MergeEdge.feature
+++ b/gremlin-test/src/main/resources/org/apache/tinkerpop/gremlin/test/features/map/MergeEdge.feature
@@ -857,11 +857,7 @@ Feature: Step - mergeE()
               option(Merge.onMatch, __.sideEffect(__.property("weight", 0)).constant([:]))
       """
     When iterated to list
-    Then the result should have a count of 2
-    And the graph should return 2 for count of "g.V()"
-    And the graph should return 0 for count of "g.E().hasLabel(\"knows\").has(\"weight\",1)"
-    And the graph should return 1 for count of "g.E().hasLabel(\"knows\").has(\"weight\",0)"
-    And the graph should return 0 for count of "g.V().has(\"weight\")"
+    Then the traversal will raise an error with message containing text of "The incoming traverser for MergeEdgeStep cannot be an Element"
 
   Scenario: g_mergeEXlabel_knows_out_marko_in_vadasX_optionXonMatch_sideEffectXpropertyXweight_0XX_constantXemptyXX
     Given the empty graph
@@ -882,4 +878,73 @@ Feature: Step - mergeE()
     And the graph should return 2 for count of "g.V()"
     And the graph should return 0 for count of "g.E().hasLabel(\"knows\").has(\"weight\",1)"
     And the graph should return 1 for count of "g.E().hasLabel(\"knows\").has(\"weight\",0)"
-    And the graph should return 0 for count of "g.V().has(\"weight\")"
\ No newline at end of file
+    And the graph should return 0 for count of "g.V().has(\"weight\")"
+
+  Scenario: g_injectXlist1_list2X_mergeEXlimitXlocal_1XX_optionXonCreate_rangeXlocal_1_2XX_optionXonMatch_tailXlocalXX_to_match
+    Given the empty graph
+    And the graph initializer of
+      """
+      g.addV("person").property("name", "marko").property("age", 29).as("marko").
+        addV("person").property("name", "vadas").property("age", 27).as("vadas").
+        addV("software").property("name", "lop").property("lang", "java").as("lop").
+        addV("person").property("name","josh").property("age", 32).as("josh").
+        addV("software").property("name", "ripple").property("lang", "java").as("ripple").
+        addV("person").property("name", "peter").property("age", 35).as('peter').
+        addE("knows").from("marko").to("vadas").property("weight", 0.5d).
+        addE("knows").from("marko").to("josh").property("weight", 1.0d).
+        addE("created").from("marko").to("lop").property("weight", 0.4d).
+        addE("created").from("josh").to("ripple").property("weight", 1.0d).
+        addE("created").from("josh").to("lop").property("weight", 0.4d).
+        addE("created").from("peter").to("lop").property("weight", 0.2d)
+      """
+    And using the parameter xx1 defined as "m[{\"t[label]\": \"knows\", \"D[OUT]\":\"v[marko]\", \"D[IN]\":\"v[vadas]\"}]"
+    And using the parameter xx2 defined as "m[{\"created\": \"N\"}]"
+    And the traversal of
+      """
+      g.inject(xx1, xx1, xx2).
+        fold().
+        mergeE(__.limit(Scope.local,1)).
+          option(Merge.onCreate, __.range(Scope.local, 1, 2)).
+          option(Merge.onMatch, __.tail(Scope.local))
+      """
+    When iterated to list
+    Then the result should have a count of 1
+    And the graph should return 6 for count of "g.V()"
+    And the graph should return 6 for count of "g.E()"
+    And the graph should return 1 for count of "g.E().has(\"created\",\"N\")"
+    And the graph should return 1 for count of "g.V().has(\"person\",\"name\",\"marko\").outE(\"knows\").has(\"created\",\"N\").inV().has(\"person\",\"name\",\"vadas\")"
+
+  Scenario: g_injectXlist1_list2X_mergeEXlimitXlocal_1XX_optionXonCreate_rangeXlocal_1_2XX_optionXonMatch_tailXlocalXX_to_create
+    Given the empty graph
+    And the graph initializer of
+      """
+      g.addV("person").property("name", "marko").property("age", 29).as("marko").
+        addV("person").property("name", "vadas").property("age", 27).as("vadas").
+        addV("software").property("name", "lop").property("lang", "java").as("lop").
+        addV("person").property("name","josh").property("age", 32).as("josh").
+        addV("software").property("name", "ripple").property("lang", "java").as("ripple").
+        addV("person").property("name", "peter").property("age", 35).as('peter').
+        addE("knows").from("marko").to("vadas").property("weight", 0.5d).
+        addE("knows").from("marko").to("josh").property("weight", 1.0d).
+        addE("created").from("marko").to("lop").property("weight", 0.4d).
+        addE("created").from("josh").to("ripple").property("weight", 1.0d).
+        addE("created").from("josh").to("lop").property("weight", 0.4d).
+        addE("created").from("peter").to("lop").property("weight", 0.2d)
+      """
+    And using the parameter xx1 defined as "m[{\"t[label]\": \"self\", \"D[OUT]\":\"v[vadas]\", \"D[IN]\":\"v[vadas]\"}]"
+    And using the parameter xx2 defined as "m[{\"created\": \"N\"}]"
+    And the traversal of
+      """
+      g.inject(xx1, xx1, xx2).
+        fold().
+        mergeE(__.limit(Scope.local,1)).
+          option(Merge.onCreate, __.range(Scope.local, 1, 2)).
+          option(Merge.onMatch, __.tail(Scope.local))
+      """
+    When iterated to list
+    Then the result should have a count of 1
+    And the graph should return 6 for count of "g.V()"
+    And the graph should return 7 for count of "g.E()"
+    And the graph should return 7 for count of "g.E().hasNot(\"created\")"
+    And the graph should return 1 for count of "g.V().has(\"person\",\"name\",\"marko\").outE(\"knows\").hasNot(\"created\").inV().has(\"person\",\"name\",\"vadas\")"
+    And the graph should return 1 for count of "g.V().has(\"person\",\"name\",\"vadas\").outE(\"self\").hasNot('weight').inV().has(\"person\",\"name\",\"vadas\")"
\ No newline at end of file
diff --git a/gremlin-test/src/main/resources/org/apache/tinkerpop/gremlin/test/features/map/MergeVertex.feature b/gremlin-test/src/main/resources/org/apache/tinkerpop/gremlin/test/features/map/MergeVertex.feature
index a0967bf9ef..175fc44b42 100644
--- a/gremlin-test/src/main/resources/org/apache/tinkerpop/gremlin/test/features/map/MergeVertex.feature
+++ b/gremlin-test/src/main/resources/org/apache/tinkerpop/gremlin/test/features/map/MergeVertex.feature
@@ -654,9 +654,7 @@ Feature: Step - mergeV()
           option(Merge.onMatch, __.sideEffect(__.properties("age").drop()).select("m"))
       """
     When iterated to list
-    Then the result should have a count of 1
-    And the graph should return 1 for count of "g.V().has(\"person\",\"name\",\"marko\").has(\"age\", 19)"
-    And the graph should return 1 for count of "g.V().has(\"person\",\"name\",\"marko\").has(\"age\")"
+    Then the traversal will raise an error with message containing text of "The incoming traverser for MergeVertexStep cannot be an Element"
 
   # onCreate inheritance from merge
   @UserSuppliedVertexIds
@@ -838,3 +836,45 @@ Feature: Step - mergeV()
       """
     When iterated to list
     Then the traversal will raise an error with message containing text of "Property key can not be a hidden key: ~label"
+
+  Scenario: g_injectXlist1_list2X_mergeVXlimitXlocal_1XX_optionXonCreate_rangeXlocal_1_2X_optionXonMatch_tailXlocalXX_to_match
+    Given the empty graph
+    And the graph initializer of
+      """
+      g.addV("person").property("name", "marko").property("age", 29)
+      """
+    And using the parameter xx1 defined as "m[{\"t[label]\": \"person\", \"name\":\"marko\"}]"
+    And using the parameter xx2 defined as "m[{\"created\": \"N\"}]"
+    And the traversal of
+      """
+      g.inject(xx1, xx1, xx2).
+        fold().
+        mergeV(__.limit(Scope.local,1)).
+          option(Merge.onCreate, __.range(Scope.local, 1, 2)).
+          option(Merge.onMatch, __.tail(Scope.local))
+      """
+    When iterated to list
+    Then the result should have a count of 1
+    And the graph should return 1 for count of "g.V().has(\"person\",\"name\",\"marko\").has(\"created\",\"N\")"
+    And the graph should return 1 for count of "g.V()"
+
+  Scenario: g_injectXlist1_list2X_mergeVXlimitXlocal_1XX_optionXonCreate_rangeXlocal_1_2X_optionXonMatch_tailXlocalXX_to_create
+    Given the empty graph
+    And the graph initializer of
+      """
+      g.addV("person").property("name", "marko").property("age", 29)
+      """
+    And using the parameter xx1 defined as "m[{\"t[label]\": \"person\", \"name\":\"stephen\"}]"
+    And using the parameter xx2 defined as "m[{\"created\": \"N\"}]"
+    And the traversal of
+      """
+      g.inject(xx1, xx1, xx2).
+        fold().
+        mergeV(__.limit(Scope.local,1)).
+          option(Merge.onCreate, __.range(Scope.local, 1, 2)).
+          option(Merge.onMatch, __.tail(Scope.local))
+      """
+    When iterated to list
+    Then the result should have a count of 1
+    And the graph should return 1 for count of "g.V().has(\"person\",\"name\",\"stephen\").hasNot(\"created\")"
+    And the graph should return 2 for count of "g.V()"
\ No newline at end of file