Upgraded to Java 7 and Delombok now gives me a VerifyError

[Anthony Whitford]

I upgraded my laptop to Mac OS X 10.9, and so had to upgrade to Java 7 Update 45 in the process (previously running Java 6 Update 51, I think).

Now my use of delombok from Version 1.12.2 is failing with the error:

[ERROR] Failed to execute goal org.projectlombok:lombok-maven-plugin:1.12.2.1-SNAPSHOT:delombok (delombok) on project test-maven-lombok: Execution delombok of goal org.projectlombok:lombok-maven-plugin:1.12.2.1-SNAPSHOT:delombok failed: An API incompatibility was encountered while executing org.projectlombok:lombok-maven-plugin:1.12.2.1-SNAPSHOT:delombok: java.lang.VerifyError: Bad type on operand stack
[ERROR] Exception Details:
[ERROR] Location:
[ERROR] lombok/delombok/Delombok.delombok()Z @222: invokevirtual
[ERROR] Reason:
[ERROR] Type 'com/sun/tools/javac/comp/Todo' (current frame, stack[2]) is not assignable to 'com/sun/tools/javac/util/ListBuffer'
[ERROR] Current Frame:
[ERROR] bci: @222
[ERROR] flags: { }
[ERROR] locals: { 'lombok/delombok/Delombok', 'lombok/javac/LombokOptions', 'lombok/javac/CommentCatcher', 'com/sun/tools/javac/main/JavaCompiler', 'java/util/List', 'java/util/Map', 'com/sun/tools/javac/main/JavaCompiler' }
[ERROR] stack: { 'com/sun/tools/javac/main/JavaCompiler', 'com/sun/tools/javac/main/JavaCompiler', 'com/sun/tools/javac/comp/Todo' }

Is this a known issue?  Is there a workaround?  Or is this a bug?

[Reinier Zwitserloot]

Sounds like a real problem; in all sources we can find, 'Todo' extends 'ListBuffer'. Unfortunately, a casual glance at the delombok method does not find any place where a Todo is on the stack but a ListBuffer is required.

I've downloaded j7u45 for mac and tried to delombok a very simple example (with @Getter), and this does NOT reproduce the problem.

Any chance I can convince you to give me a simple singular source file that reliably triggers this bug when delomboking?

 --Reinier Zwitserloot

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[Reinier Zwitserloot]

line 394 in Delombok.java specifically does some reflection-based gymnastics to solve this very problem, but that code has been in lombok for a while so I'm very confused. are you 100% sure this is v1.12.something? It's a carbon copy of an issue we already solved.

 --Reinier Zwitserloot

[Anthony Whitford]

I stumbled across this simply building my lombok.maven plugin:  https://github.com/awhitford/lombok.maven

You can just clone it and run:  mvn install

You can also see the Travis CI build results:  https://travis-ci.org/awhitford/lombok.maven

[Reinier Zwitserloot]

I cloned your git repository and reran your build. I used the -e switch for some more details; lombok-pg 0.11.3 is on the classpath before delombok and it contains a bug we fixed a long time ago. I don't know enough about mvn to know how to get lombok-pg off the classpath (or such that lombok itself takes precedence), but that seems to be the problem.