Description Neil Gentleman 2012-11-13 18:48:24 EST

When compiling for Java 7, AspectJ can compute an invalid StackMapTable. The verifier will throw a ClassNotFoundException when the generated class is loaded.

Example:
class Parent<T> {}
class ChildA<T> extends Parent<T> {}
class ChildB<T> extends Parent<T> {}

public Object methodWithBadStackMapTable(boolean value) {
	return value ? new ChildA<String>() : new ChildB<String>();
}

javap shows the computed StackMapTable to be:
StackMapTable: number_of_entries = 2
   frame_type = 15 /* same */
   frame_type = 71 /* same_locals_1_stack_item */
  stack = [ class "Parent<T>" ]

when it should be:
StackMapTable: number_of_entries = 2
   frame_type = 15 /* same */
   frame_type = 71 /* same_locals_1_stack_item */
  stack = [ class Parent ]