[GROOVY-10299] Groovy compiler generates invalid Java stubs

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 4.0.0-beta-1
• Fix Version/s: 2.4.22, 4.0.0-beta-2, 3.0.10
• Component/s: Stub generator / Joint compiler
• Assignee: Eric Milles
• Reporter: Lóránt Pintér
• Created: 12/Oct/21 13:58
• Updated: 13/Mar/23 17:20
• Resolved: 12/Oct/21 18:02

Description

Steps to reproduce:

• check out https://github.com/gradle/gradle/releases/tag/groovy-4-compile-problem-2
• run ./gradlew :test-kit:compileIntegTestGroovy --no-configuration-cache

> Task :test-kit:compileIntegTestGroovy FAILED
Executing Spock 2.0.0-groovy-3.0 with NOT compatible Groovy version 4.0.0-beta-1 due to set spock.iKnowWhatImDoing.disableGroovyVersionCheck system property. This is unsupported and may result in weird runtime errors!
/Users/lptr/Workspace/gradle/gradle/subprojects/test-kit/build/tmp/compileIntegTestGroovy/groovy-java-stubs/org/gradle/testkit/runner/BaseGradleRunnerIntegrationTest.java:92: error: '.class' expected
protected final boolean debug = new java.lang.Boolean((boolean -> boolean)false);
                                                               ^
/Users/lptr/Workspace/gradle/gradle/subprojects/test-kit/build/tmp/compileIntegTestGroovy/groovy-java-stubs/org/gradle/testkit/runner/BaseGradleRunnerIntegrationTest.java:92: error: <identifier> expected
protected final boolean debug = new java.lang.Boolean((boolean -> boolean)false);
                                                                         ^
/Users/lptr/Workspace/gradle/gradle/subprojects/test-kit/build/tmp/compileIntegTestGroovy/groovy-java-stubs/org/gradle/testkit/runner/BaseGradleRunnerIntegrationTest.java:92: error: unexpected type
protected final boolean debug = new java.lang.Boolean((boolean -> boolean)false);
                                                       ^
  required: value
  found:    class
3 errors
startup failed:
Compilation failed; see the compiler error output for details.

1 error

See the attached BaseGradleRunnerIntegrationTest.java for the generated stubs.