[GROOVY-7322] Problem With Static Trait Methods

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.4.1
• Fix Version/s: 2.4.2
• Assignee: Cédric Champeau
• Reporter: Jeff Brown
• Created: 25/Feb/15 20:55
• Updated: 10/Sep/23 22:14
• Resolved: 06/Mar/15 07:45

Description

The attached statictraitmethods.zip contains the following:

src/main/groovy/demo/SomeTrait.groovy

package demo

import groovy.transform.CompileStatic

@CompileStatic
trait SomeTrait {

    static someMethod() {
        List theNames = getNames()
        theNames
    }

    static List getNames() {
        ['Jeff', 'Betsy', 'Jake', 'Zack']
    }
}

The code will not compile:

$ ./gradlew clean test
:clean UP-TO-DATE
:compileJava UP-TO-DATE
:compileGroovy
startup failed:
/Users/jeff/statictraitmethods/src/main/groovy/demo/SomeTrait.groovy: 9: [Static type checking] - Cannot find matching method demo.SomeTrait#getNames(). Please check if the declared type is right and if the method exists.
 @ line 9, column 25.
           List theNames = getNames()
                           ^

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: 5.148 secs

This may be the same problem as that described in GROOVY-7191. That issue describes the problem as relating to calling static methods from an instance method. The example above suggests that the problem is more general than that.

Issue Links

• is related to: GROOVY-7191 CompileStatic Will Not Allow Instance Method In Trait To Call Static Method
• relates to: GROOVY-8854 MissingMethodException when a public method on a trait calls a static private one in a class hierarchy