[GROOVY-9987] MissingMethodException when a base class calls a private static method inside a closure

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 5.0.0-alpha-1

Language

groovy

• Assignee: Eric Milles
• Reporter: Benedikt Ritter
• Created: 17/Mar/21 10:39
• Updated: 23/Aug/23 09:11
• Resolved: 17/Jul/23 13:25

Description

A method call inside a closure that targets a base class private method results in a MissingMethodException.

class Base {
    def baseRun() {
        [1].each {
            baseRunStatic()
        }
    }
    private static void baseRunStatic() {
        println "baseRunStatic()"
    }
}
class StaticTest extends Base {
    def run() {
        baseRun()
    }
}
new StaticTest().run()

Try executing the attached script with Groovy 3.0.7. It will yield:

❯ groovy test.groovy
Caught: groovy.lang.MissingMethodException: No signature of method: StaticTest.baseRunStatic() is applicable for argument types: () values: []
groovy.lang.MissingMethodException: No signature of method: StaticTest.baseRunStatic() is applicable for argument types: () values: []
	at Base$_baseRun_closure1.doCall(test.groovy:5)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at Base.baseRun(test.groovy:4)
	at Base$baseRun.callCurrent(Unknown Source)
	at StaticTest.run(test.groovy:17)
	at StaticTest$run.call(Unknown Source)
	at test.run(test.groovy:21)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

As a work around the method call to baseRunStatic() can be prefixed with the class name.

Issue Links

• is related to: GROOVY-2433 Closure in base class unable to call private methods when invoked from derived class