[GROOVY-9565] StackoverflowError when using an abstract class with generic parameters as the return value of a closure

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.5.11, 2.5.12, 2.5.13
• Fix Version/s: 2.5.14
• Component/s: Static Type Checker
• Labels: StackOverflowError
• Assignee: Eric Milles
• Reporter: Daniel Demus
• Created: 21/May/20 16:06
• Updated: 11/Jul/23 14:07
• Resolved: 11/Jul/23 14:07

Description

If you try to compile the project at https://github.com/demus-nine/groovy-class-generic-stackoverflowerror groovyc crashes with a StackoverflowError. This happens in org.codehaus.groovy.transform.stc.StaticTypeCheckingSupport#applyGenericsContext(java.util.Map<org.codehaus.groovy.ast.GenericsType.GenericsTypeName,org.codehaus.groovy.ast.GenericsType>, org.codehaus.groovy.ast.ClassNode) in this bit of recursive code:

if (bound.isArray()) {
    return applyGenericsContext(spec, bound.getComponentType()).makeArray();
}

although I have seen it throw in other methods in the StaticTypeCheckingSupport class.

 

The class that is being handled is an abstract class with a generic parameter, but in the code using the type there aren't enough hints to the compiler to resolve the generic constraint, possibly because it is self-referential.