[GROOVY-10464] Wrong cast for type parameter in generated stubs

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.0.9, 4.0.0
• Fix Version/s: 3.0.10, 4.0.1, 2.5.21
• Component/s: Stub generator / Joint compiler
• Assignee: Eric Milles
• Reporter: Eric Milles
• Created: 26/Jan/22 16:47
• Updated: 18/Jan/23 00:03
• Resolved: 27/Jan/22 17:16

Description

Consider the following:

abstract class A<T> {
  A(Class<T> t) {
  }
}

class C extends A<E> {
  C() {
    super(E) // stubgen: "super((Class<T>)null);"
  }
}

enum E {
}

When class C is used by java sources, the joint compiler / stub generator creates an error for the java source. I was only able to work around this by changing "Class<T>" to "Class" which is no longer type-safe. In the case of the example given in the comments of GROOVY-10122 where the type parameter T is the type of the constructor parameter, it would need to be changed to Object.

Issue Links

• is a clone of: GROOVY-10122 Wrong cast in stubs generated