[GROOVY-7113] Problem With Stubs Related To Class Which Implements A Trait

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.3.7
• Fix Version/s: 2.3.8, 2.4.0-beta-4
• Component/s: Stub generator / Joint compiler
• Assignee: Cédric Champeau
• Reporter: Jeff Brown
• Created: 10/Oct/14 15:06
• Updated: 17/Dec/14 13:25
• Resolved: 04/Nov/14 09:25

Description

The attached traitinheritance.zip file contains the following code:

src/main/groovy/demo/DemoTrait.groovy

package demo

trait DemoTrait {

    int getMagicNumber() {
        42
    }
}

src/main/groovy/demo/DemoClass.groovy

package demo

class DemoClass implements DemoTrait {}

All of that compiles as expected. If I add this class compilation fails:

src/main/groovy/demo/DemoSubClass.java

package demo;

public class DemoSubClass extends DemoClass {}

Note that the compilation error message doesn't mention the newly created subclass. It mentions the class that previously compiled without error.

$ ./gradlew clean cG
:clean
:compileJava UP-TO-DATE
:compileGroovy
/Users/jeff/traitinheritance/build/tmp/groovy-java-stubs/demo/DemoClass.java:10: error: DemoClass is not abstract and does not override abstract method getMagicNumber() in DemoTrait
public class DemoClass
       ^
1 error
startup failed:
Compilation failed; see the compiler error output for details.

1 error

:compileGroovy FAILED

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':compileGroovy'.
> Compilation failed; see the compiler error output for details.

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.

BUILD FAILED

Total time: 4.378 secs