[GROOVY-4922] StackOverflowError when calling super and overriding a package protected java method

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.8.0
• Fix Version/s: 2.0-beta-3, 1.7.11, 1.8.7
• Assignee: Cédric Champeau
• Reporter: Cédric Champeau
• Created: 13/Jul/11 14:55
• Updated: 13/May/12 03:30
• Resolved: 14/Feb/12 12:28

Description

For reference : http://groovy.329449.n5.nabble.com/StackOverflowError-when-dispatching-to-super-td4572268.html

If a package protected method written in a Java class is overriden in a Groovy class and that method calls super.method(), Groovy throws a stack overflow :

Parent.java

class Parent {
   void someMethod(String param) { ... }
}

Child.groovy

class Child {
   void someMethod(String param) { super.someMethod(param) }
}

java.lang.StackOverflowError
	at java.lang.Exception.<init>(Exception.java:77)
	at java.lang.reflect.InvocationTargetException.<init>(InvocationTargetException.java:54)
	at sun.reflect.GeneratedMethodAccessor1.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:90)
	at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:233)
	at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1054)
	at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodOnSuperN(ScriptBytecodeAdapter.java:128)
	at groovy.bugs.GroovyStackOverflowBug$Child.someMethod(GroovyStackOverflowBug.groovy:39)
	at sun.reflect.GeneratedMethodAccessor1.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:90)
	at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:233)
	at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1054)
	at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodOnSuperN(ScriptBytecodeAdapter.java:128)
	at groovy.bugs.GroovyStackOverflowBug$Child.someMethod(GroovyStackOverflowBug.groovy:39)
	at sun.reflect.GeneratedMethodAccessor1.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:90)
	at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:233)
	at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1054)
	at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodOnSuperN(ScriptBytecodeAdapter.java:128)
	at groovy.bugs.GroovyStackOverflowBug$Child.someMethod(GroovyStackOverflowBug.groovy:39)
	at sun.reflect.GeneratedMethodAccessor1.invoke(Unknown Source)
...

Adding a public or protected modifier to the super class solves the problem.