lptr / intellij-groovyc-bug

IntelliJ Groovy compiler bug with Groovy 2.5

IntelliJ Groovy 2.5 compilation issue

There seems to be a bug in IntelliJ's Groovy compiler that fails when using Groovy 2.5, but succeeds when using Groovy 2.4. Here's how to reproduce it:

1. Import the project in IntelliJ 2018.2.3 by selecting build.gradle and choosing Open as Project....

2. The Groovy version in build.gradle should be set to 2.4.15.

3. Disable Delegate build/run actions to Gradle in Build, Execution, Deployment > Build Tools > Gradle > Runner (running via Gradle works fine, this is a problem with IntelliJ's build)

4. Choose a JDK 9 or 10. OpenJDK works just as well as Oracle. I tested this with OpenJDK 9.0.4, 10.0.2 and Oracle JDK 9.0.1 and 9.0.4 with similar results.

5. Running App in the src/main/groovy source folder, it should print this:

   WARNING: An illegal reflective access operation has occurred
   WARNING: Illegal reflective access by org.codehaus.groovy.reflection.CachedClass (file:/Users/lptr/.gradle/caches/modules-2/files-2.1/org.codehaus.groovy/groovy/2.4.15/74b7e0b99526c569e3a59cb84dbcc6204d601ee6/groovy-2.4.15.jar) to method java.lang.Object.finalize()
   WARNING: Please consider reporting this to the maintainers of org.codehaus.groovy.reflection.CachedClass
   WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
   WARNING: All illegal access operations will be denied in a future release
   Hello from Groovy 2.4.15, I can see com.sun.jdi.VMDisconnectedException!
   

6. Running it from the command-line has the same effect:

   $ ./gradlew -q run
   WARNING: An illegal reflective access operation has occurred
   WARNING: Illegal reflective access by org.codehaus.groovy.reflection.CachedClass (file:/Users/lptr/.gradle/caches/modules-2/files-2.1/org.codehaus.groovy/groovy/2.4.15/74b7e0b99526c569e3a59cb84dbcc6204d601ee6/groovy-2.4.15.jar) to method java.lang.Object.finalize()
   WARNING: Please consider reporting this to the maintainers of org.codehaus.groovy.reflection.CachedClass
   WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
   WARNING: All illegal access operations will be denied in a future release
   Hello from Groovy 2.4.15, I can see com.sun.jdi.VMDisconnectedException!

7. Now change the Groovy version in build.gradle from 2.4.15 to 2.5.2. (The bug can be reproduced with Groovy 2.5.1 and 2.5.0 as well.)

8. Make sure the changes are imported and the import is finished.

9. Try running App again, or rebuild the project from Build > Reuild Project.

10. You'll see a failure like this in the Messages > Build view:

    Information:Builder "Groovy compiler" requested rebuild of module chunk "intellij-groovyc-bug_main"
    Information:Module "intellij-groovyc-bug_main" was fully rebuilt due to project configuration/dependencies changes
    Information:2018. 09. 11. 10:48 - Compilation completed with 1 error and 0 warnings in 3 s 85 ms
    /Users/lptr/Workspace/gradle/bugs/intellij-groovyc-bug/src/main/groovy/org/example/jdi/App.groovy
    Error:(3, 1) Groovyc: unable to resolve class com.sun.jdi.VMDisconnectedException
    

11. Try running it via the command line and it works fine with Groovy 2.5.2:

    $ ./gradlew -q run
    WARNING: An illegal reflective access operation has occurred
    WARNING: Illegal reflective access by org.codehaus.groovy.vmplugin.v7.Java7$1 (file:/Users/lptr/.gradle/caches/modules-2/files-2.1/org.codehaus.groovy/groovy/2.5.2/ff667436cfd98cc2c7e58631883c75d23d52261b/groovy-2.5.2.jar) to constructor java.lang.invoke.MethodHandles$Lookup(java.lang.Class,int)
    WARNING: Please consider reporting this to the maintainers of org.codehaus.groovy.vmplugin.v7.Java7$1
    WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
    WARNING: All illegal access operations will be denied in a future release
    Hello from Groovy 2.5.2, I can see com.sun.jdi.VMDisconnectedException!