[GROOVY-8507] groovyc hangs when compiling nested enum

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.4.5
• Fix Version/s: 3.0.0-beta-3
• Component/s: Compiler
• Environment: Linux ubuntu-xenial 4.4.0-116-generic #140-Ubuntu SMP Mon Feb 12 21:23:04 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
• Assignee: Eric Milles
• Reporter: Álvaro Iradier
• Created: 13/Mar/18 09:04
• Updated: 11/Nov/20 02:01
• Resolved: 29/Oct/19 23:43

Description

This problem was discovered in a Jenkins pipeline, but then nailed down and found it failed with groovyc compiler too.

Creating a script with two nested enums, like:

class TestClass {
    enum OuterEnum {
        VALUE,
        enum InnerEnum {
            A
        }
    }
}

And compiling with groovyc script.groovy makes the compiler freeze with 100% CPU usage.

In Jenkins, this results in the Job and executor being freezed and zombie (need to kill the job and executor thread), but I am reporting this to Jenkins as an independent issue.

As the problem seems to happen in a stripped down groovy script, I am reporting it here too.

Issue Links

• links to: GitHub Pull Request #1063