NPE from within CoverageModule.convertCoverageToRuby #5111
Description
After stopping my test Tomcat instance, SimpleCov's at_exit hook is attempting to produce a coverage report, but errors out in the process:
cat ~/opt/apache-tomcat-8.5.20/logs/localhost.2018-03-26.log:
26-Mar-2018 11:22:21.678 SEVERE [localhost-startStop-2] org.apache.catalina.core.ApplicationFilterConfig.release Failed to destroy the filter named [RackFilter] of type [org.jruby.rack.RackFilter]
java.lang.NullPointerException
at org.jruby.ext.coverage.CoverageModule.convertCoverageToRuby(CoverageModule.java:81)
at org.jruby.ext.coverage.CoverageModule.result(CoverageModule.java:61)
at org.jruby.ext.coverage.CoverageModule$INVOKER$s$0$0$result_DBG.call(CoverageModule$INVOKER$s$0$0$result_DBG.gen)
at org.jruby.runtime.callsite.CachingCallSite.cacheAndCall(CachingCallSite.java:298)
at org.jruby.runtime.callsite.CachingCallSite.call(CachingCallSite.java:127)
at org.jruby.ir.interpreter.InterpreterEngine.processCall(InterpreterEngine.java:344)
at org.jruby.ir.interpreter.StartupInterpreterEngine.interpret(StartupInterpreterEngine.java:74)
at org.jruby.ir.interpreter.InterpreterEngine.interpret(InterpreterEngine.java:78)
at org.jruby.internal.runtime.methods.MixedModeIRMethod.INTERPRET_METHOD(MixedModeIRMethod.java:144)
at org.jruby.internal.runtime.methods.MixedModeIRMethod.call(MixedModeIRMethod.java:130)
at org.jruby.internal.runtime.methods.DynamicMethod.call(DynamicMethod.java:192)
at org.jruby.runtime.callsite.CachingCallSite.cacheAndCall(CachingCallSite.java:298)
at org.jruby.runtime.callsite.CachingCallSite.call(CachingCallSite.java:127)
at org.jruby.ir.interpreter.InterpreterEngine.processCall(InterpreterEngine.java:344)
at org.jruby.ir.interpreter.StartupInterpreterEngine.interpret(StartupInterpreterEngine.java:74)
at org.jruby.ir.interpreter.Interpreter.INTERPRET_BLOCK(Interpreter.java:132)
at org.jruby.runtime.MixedModeIRBlockBody.commonYieldPath(MixedModeIRBlockBody.java:148)
at org.jruby.runtime.IRBlockBody.call(IRBlockBody.java:73)
at org.jruby.runtime.Block.call(Block.java:124)
at org.jruby.RubyProc.call(RubyProc.java:289)
at org.jruby.RubyProc.call19(RubyProc.java:273)
at org.jruby.RubyProc$INVOKER$i$0$0$call19_DBG.call(RubyProc$INVOKER$i$0$0$call19_DBG.gen)
at org.jruby.internal.runtime.methods.DynamicMethod.call(DynamicMethod.java:196)
at org.jruby.internal.runtime.methods.DynamicMethod.call(DynamicMethod.java:192)
at org.jruby.runtime.callsite.CachingCallSite.cacheAndCall(CachingCallSite.java:298)
at org.jruby.runtime.callsite.CachingCallSite.call(CachingCallSite.java:127)
at org.jruby.ir.interpreter.InterpreterEngine.processCall(InterpreterEngine.java:344)
at org.jruby.ir.interpreter.StartupInterpreterEngine.interpret(StartupInterpreterEngine.java:74)
at org.jruby.ir.interpreter.InterpreterEngine.interpret(InterpreterEngine.java:78)
at org.jruby.internal.runtime.methods.MixedModeIRMethod.INTERPRET_METHOD(MixedModeIRMethod.java:144)
at org.jruby.internal.runtime.methods.MixedModeIRMethod.call(MixedModeIRMethod.java:130)
at org.jruby.internal.runtime.methods.DynamicMethod.call(DynamicMethod.java:192)
at org.jruby.runtime.callsite.CachingCallSite.cacheAndCall(CachingCallSite.java:298)
at org.jruby.runtime.callsite.CachingCallSite.call(CachingCallSite.java:127)
at org.jruby.ir.interpreter.InterpreterEngine.processCall(InterpreterEngine.java:344)
at org.jruby.ir.interpreter.StartupInterpreterEngine.interpret(StartupInterpreterEngine.java:74)
at org.jruby.ir.interpreter.Interpreter.INTERPRET_BLOCK(Interpreter.java:132)
at org.jruby.runtime.MixedModeIRBlockBody.commonYieldPath(MixedModeIRBlockBody.java:148)
at org.jruby.runtime.IRBlockBody.call(IRBlockBody.java:73)
at org.jruby.runtime.Block.call(Block.java:124)
at org.jruby.RubyProc.call(RubyProc.java:289)
at org.jruby.RubyProc.call(RubyProc.java:246)
at org.jruby.Ruby.tearDown(Ruby.java:3229)
at org.jruby.rack.DefaultRackApplicationFactory$RackApplicationImpl.destroy(DefaultRackApplicationFactory.java:455)
at org.jruby.rack.DefaultRackApplicationFactory.finishedWithApplication(DefaultRackApplicationFactory.java:125)
at org.jruby.rack.SharedRackApplicationFactory.destroy(SharedRackApplicationFactory.java:60)
at org.jruby.rack.DefaultRackDispatcher.destroy(DefaultRackDispatcher.java:74)
at org.jruby.rack.AbstractFilter.destroy(AbstractFilter.java:77)
at org.apache.catalina.core.ApplicationFilterConfig.release(ApplicationFilterConfig.java:318)
at org.apache.catalina.core.StandardContext.filterStop(StandardContext.java:4623)
at org.apache.catalina.core.StandardContext.stopInternal(StandardContext.java:5421)
at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:226)
at org.apache.catalina.core.ContainerBase$StopChild.call(ContainerBase.java:1435)
at org.apache.catalina.core.ContainerBase$StopChild.call(ContainerBase.java:1424)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
Environment
- JRuby 9.1.15.0
- Warbler from
mastervia git - Tomcat 8.5.20
- Java 1.8.0_121-b13
- macOS High Sierra:
Darwin brakebills.home 17.4.0 Darwin Kernel Version 17.4.0: Sun Dec 17 09:19:54 PST 2017; root:xnu-4570.41.2~1/RELEASE_X86_64 x86_64
Other relevant info you may wish to add:
- SimpleCov
0.16.1 - Rails
5.0.6 RAILS_ENV=testJAVA_OPTS=-Xmx2g -Djruby.debug.fullTrace=true
Expected Behavior
- I expect SimpleCov to generate a code coverage report without causing an NPE when the JRuby interpreter is spawned by Tomcat / Warbler in a manner similar to how it is able to do so when started from the command line.