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NullPointerException with JRuby 1.7.17 running rspec & simplecov in debug mode #2296

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phrinx opened this issue Dec 9, 2014 · 2 comments
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NullPointerException with JRuby 1.7.17 running rspec & simplecov in debug mode #2296

phrinx opened this issue Dec 9, 2014 · 2 comments
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@mkristian
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core JRuby 1.7.x
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JRuby 1.7.18

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@phrinx
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phrinx commented Dec 9, 2014

I've upgraded from jruby 1.7.16 to 1.7.17 today and ran into a NPE which seems to be regression in the latest release.

Example:

|jruby-1.7.17@debug_issue| thq-m-dkoeh01 in ~/workspace/debug_issue_with_jruby_1_7_17
 ±  |master ✓| → rspec test.rb --debug
 /Users/dkoehler/.rvm/gems/jruby-1.7.17@debug_issue/gems/simplecov-0.9.1/lib/simplecov.rb:31 warning: tracing (e.g. set_trace_func) will not capture all events without --debug flag
 /Users/dkoehler/.rvm/gems/jruby-1.7.17@debug_issue/gems/ruby-debug-base-0.10.4-java/lib/ruby-debug-base.rb:214 warning: tracing (e.g. set_trace_func) will not capture all events without --debug flag
 Ruby.java:3065:in `callEventHooks': java.lang.NullPointerException
    from ASTInterpreter.java:239:in `callTraceFunction'
    from NewlineNode.java:101:in `interpret'
    from EnsureNode.java:98:in `interpret'
    from ASTInterpreter.java:74:in `INTERPRET_METHOD'
    from InterpretedMethod.java:268:in `call'
    from DefaultMethod.java:235:in `call'
    from CachingCallSite.java:366:in `cacheAndCall'
    from CachingCallSite.java:238:in `call'
    from FCallThreeArgNode.java:40:in `interpret'
    from CallNoArgNode.java:60:in `interpret'
    from DAsgnNode.java:110:in `interpret'
    from NewlineNode.java:105:in `interpret'
    from BlockNode.java:71:in `interpret'
    from ASTInterpreter.java:112:in `INTERPRET_BLOCK'
    from Interpreted19Block.java:206:in `evalBlockBody'
    from Interpreted19Block.java:194:in `yield'
    from Interpreted19Block.java:125:in `call'
    from Block.java:101:in `call'
    from RubyProc.java:290:in `call'
    from RubyProc.java:228:in `call'
    from Ruby.java:3157:in `tearDown'
    from Ruby.java:3141:in `tearDown'
    from Main.java:294:in `internalRun'
    from Main.java:217:in `run'
    from Main.java:197:in `main'

To reproduce this error, I've create a minimal project:https://github.com/phrinx/debug_issue_jruby_1_7_17.

It seems the culprit here is 'simplecov' commenting out the block at https://github.com/phrinx/debug_issue_jruby_1_7_17/blob/master/spec/spec_helper.rb#L3 does not reproduce the error.
@enebo enebo added this to the JRuby 1.7.18 milestone Dec 9, 2014
@headius
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headius commented Dec 10, 2014

We would like to release 1.7.18 very soon, so let us know if @mkristian can't get to it.

mkristian added a commit that referenced this issue Dec 11, 2014
@mkristian
copy the old eventHooks list when adding a new eventHook
2746b56 
fixes #2296

Sponsored by Lookout Inc.
@mkristian
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@headius will add a small test case somewhere

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