[jira] [Created] (GROOVY-9852) Result is already complete

["André Filipe Aloise (Jira)" <ji...@apache.org>]

André Filipe Aloise created GROOVY-9852:
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             Summary: Result is already complete
                 Key: GROOVY-9852
                 URL: https://issues.apache.org/jira/browse/GROOVY-9852
             Project: Groovy
          Issue Type: Bug
    Affects Versions: 3.0.5
         Environment: Windows 10
OpenJDK Runtime Environment (AdoptOpenJDK)(build 1.8.0_272-b10)
            Reporter: André Filipe Aloise


Steps:

1 - Consider this reproducer [https://github.com/ptomaszek/vertx-groovy]

2 - Edit build.gradle and change vertxVersion to '4.0.0.Beta1' (uses Groovy 3.0.3)

3 - Edit org.example.MainGroovy and replace the code of main method with the following:
{code:java}
Promise p = Promise.promise()
p.future().onSuccess { println it }
p.complete("Done with Groovy!!!"){code}
The code runs fine.

But, if in Step 2 the vertxVersion in build.gradle is changed to '4.0.0.Beta2' (uses Groovy 3.0.5), the code from Step 3 will fail with an IllegalStateException. 
{code:java}
Exception in thread "main" java.lang.IllegalStateException: Result is already complete
 at io.vertx.core.Promise.complete(Promise.java:67)
 at io.vertx.core.Promise$complete$1.call(Unknown Source)
 at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:47)
 at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:125)
 at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:139)
 at org.example.MainGroovy.main(MainGroovy.groovy:17)
{code}
If you use @CompileStatic on main method with Step 3, it works fine. The @CompileStatic is not necessary to run well with Vert.x '4.0.0.Beta1'. A Java class with similar code will work using any version of Vert.x (Beta1, Beta2, Beta3, CR1....), so doesn't looks like a Java or Vertx issue.



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