[GROOVY-2706] Unable to use increment operator on static variables prefixed by class name

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.5.4
• Fix Version/s: 1.5.6, 1.6-beta-1

Environment

Groovy Version:
1.5.4 JVM: 10.0-b19

Replicated in other environments, but this is my environment.
Java version:
java version "1.6.0_05"
Java(TM) SE Runtime Environment (build 1.6.0_05-b13)
Java HotSpot(TM) Client VM (build 10.0-b19, mixed mode, sharing)

OS:
Gentoo Linux

• Assignee: Paul King
• Reporter: David Clark
• Created: 25/Mar/08 10:21
• Updated: 27/Apr/08 04:51
• Resolved: 24/Apr/08 09:46

Description

Cannot use increment operator on static variables when prefixed by class name. For instance (++counter) works fine but (++ClassName.counter) does not. This is a runtime, not compile time issue.

The exception that is reported is:

java.lang.VerifyError: (class: StaticIncrementBug, method: main signature: 
([Ljava/lang/String;)V) Unable to pop operand off an empty stack.

It looks like incorrect byte code which is corrupting the stack. That's just a guess, I don't know enough about groovy internals to fix it.