You are viewing a plain text version of this content. The canonical link for it is here.
Posted to notifications@groovy.apache.org by "Paul King (JIRA)" <ji...@apache.org> on 2019/07/22 04:22:02 UTC
[jira] [Closed] (GROOVY-9151) Default Arguments: reference to
another defaulted parameter causes run-time errors
[ https://issues.apache.org/jira/browse/GROOVY-9151?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Paul King closed GROOVY-9151.
-----------------------------
> Default Arguments: reference to another defaulted parameter causes run-time errors
> ----------------------------------------------------------------------------------
>
> Key: GROOVY-9151
> URL: https://issues.apache.org/jira/browse/GROOVY-9151
> Project: Groovy
> Issue Type: Bug
> Reporter: Eric Milles
> Assignee: Daniel Sun
> Priority: Major
> Fix For: 3.0.0-beta-2
>
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> Default argument values may be supplied using back references, like this:
> {code}
> void hello(String s, Object o = s) { println o }
> hello('world')
> {code}
> or this:
> {code}
> void hello(String s, Object o = new String(s)) { println o }
> hello('world')
> {code}
>
> However, if the back reference {{s}} also has a default value, Groovy produces nasty errors:
> {code}
> void hello(String s = 'world', Object o = new String(s)) { println o }
> hello() // MissingPropertyException: No such property: s for class: script
> {code}
> or worse:
> {code}
> class Thing {
> Thing(String s = 'boo', Object o = new String(s)) {
> }
> }
> new Thing()
> {code}
> {code:java}
> Exception in thread "main" java.lang.VerifyError: Bad type on operand stack
> Exception Details:
> Location:
> Thing.<init>()V @21: invokeinterface
> Reason:
> Type uninitializedThis (current frame, stack[5]) is not assignable to 'java/lang/Object'
> Current Frame:
> bci: @21
> flags: { flagThisUninit }
> locals: { uninitializedThis, '[Lorg/codehaus/groovy/runtime/callsite/CallSite;' }
> stack: { uninitializedThis, 'java/lang/String', 'org/codehaus/groovy/runtime/callsite/CallSite', 'java/lang/Class', 'org/codehaus/groovy/runtime/callsite/CallSite', uninitializedThis }
> Bytecode:
> 0x0000000: b800 154c 2a12 31c0 0027 2b12 3232 1227
> 0x0000010: 2b12 3332 2ab9 0037 0200 b900 2d03 00b7
> 0x0000020: 002f b1
> at java.lang.Class.getDeclaredConstructors0(Native Method)
> at java.lang.Class.privateGetDeclaredConstructors(Class.java:2671)
> at java.lang.Class.getDeclaredConstructors(Class.java:2020)
> at org.codehaus.groovy.reflection.CachedClass$2$1.run(CachedClass.java:84)
> at java.security.AccessController.doPrivileged(Native Method)
> at org.codehaus.groovy.reflection.CachedClass$2.initValue(CachedClass.java:82)
> at org.codehaus.groovy.reflection.CachedClass$2.initValue(CachedClass.java:79)
> at org.codehaus.groovy.util.LazyReference.getLocked(LazyReference.java:49)
> at org.codehaus.groovy.util.LazyReference.get(LazyReference.java:36)
> at org.codehaus.groovy.reflection.CachedClass.getConstructors(CachedClass.java:295)
> at groovy.lang.MetaClassImpl.<init>(MetaClassImpl.java:232)
> at groovy.lang.MetaClassImpl.<init>(MetaClassImpl.java:242)
> at groovy.lang.MetaClassRegistry$MetaClassCreationHandle.createNormalMetaClass(MetaClassRegistry.java:171)
> at groovy.lang.MetaClassRegistry$MetaClassCreationHandle.createWithCustomLookup(MetaClassRegistry.java:161)
> at groovy.lang.MetaClassRegistry$MetaClassCreationHandle.create(MetaClassRegistry.java:144)
> at org.codehaus.groovy.reflection.ClassInfo.getMetaClassUnderLock(ClassInfo.java:288)
> at org.codehaus.groovy.reflection.ClassInfo.getMetaClass(ClassInfo.java:331)
> at org.codehaus.groovy.runtime.metaclass.MetaClassRegistryImpl.getMetaClass(MetaClassRegistryImpl.java:277)
> at org.codehaus.groovy.runtime.InvokerHelper.getMetaClass(InvokerHelper.java:905)
> at org.codehaus.groovy.runtime.callsite.CallSiteArray.createCallConstructorSite(CallSiteArray.java:86)
> at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCallConstructor(CallSiteArray.java:59)
> at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callConstructor(AbstractCallSite.java:238)
> at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callConstructor(AbstractCallSite.java:242)
> at script.run(script.groovy:5)
> {code}
--
This message was sent by Atlassian JIRA
(v7.6.14#76016)