markdownToHtml throws exception when switching spotbugs plugin from 1.6.1 to 1.6.2

[floscher]

Something pretty strange just happened: I wanted to update some version numbers for one of my projects. Then my CI complained that the markdownToHtml task failed. But I didn't change anything related to the markdown plugin. I'm using version 1.1.0, without any problem so far.

I was able to narrow it down, that when I build my project with the com.github.spotbugs plugin in version 1.6.1 everything is fine. As soon as I switch to version 1.6.2 the markdownToHtml task breaks.

The error message sounds similar to #14.

Click below to expand the full stacktrace:

``` > Task :markdownToHtml FAILED FAILURE: Build failed with an exception. * What went wrong: Execution failed for task ':markdownToHtml'. > Error creating extended parser class: null * Try: Run with --info or --debug option to get more log output. Run with --scan to get full insights. * Exception is: org.gradle.api.tasks.TaskExecutionException: Execution failed for task ':markdownToHtml'. at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions(ExecuteActionsTaskExecuter.java:103) at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.execute(ExecuteActionsTaskExecuter.java:73) at org.gradle.api.internal.tasks.execution.OutputDirectoryCreatingTaskExecuter.execute(OutputDirectoryCreatingTaskExecuter.java:51) at org.gradle.api.internal.tasks.execution.SkipUpToDateTaskExecuter.execute(SkipUpToDateTaskExecuter.java:59) at org.gradle.api.internal.tasks.execution.ResolveTaskOutputCachingStateExecuter.execute(ResolveTaskOutputCachingStateExecuter.java:54) at org.gradle.api.internal.tasks.execution.ValidatingTaskExecuter.execute(ValidatingTaskExecuter.java:59) at org.gradle.api.internal.tasks.execution.SkipEmptySourceFilesTaskExecuter.execute(SkipEmptySourceFilesTaskExecuter.java:101) at org.gradle.api.internal.tasks.execution.FinalizeInputFilePropertiesTaskExecuter.execute(FinalizeInputFilePropertiesTaskExecuter.java:44) at org.gradle.api.internal.tasks.execution.CleanupStaleOutputsExecuter.execute(CleanupStaleOutputsExecuter.java:91) at org.gradle.api.internal.tasks.execution.ResolveTaskArtifactStateTaskExecuter.execute(ResolveTaskArtifactStateTaskExecuter.java:62) at org.gradle.api.internal.tasks.execution.SkipTaskWithNoActionsExecuter.execute(SkipTaskWithNoActionsExecuter.java:59) at org.gradle.api.internal.tasks.execution.SkipOnlyIfTaskExecuter.execute(SkipOnlyIfTaskExecuter.java:54) at org.gradle.api.internal.tasks.execution.ExecuteAtMostOnceTaskExecuter.execute(ExecuteAtMostOnceTaskExecuter.java:43) at org.gradle.api.internal.tasks.execution.CatchExceptionTaskExecuter.execute(CatchExceptionTaskExecuter.java:34) at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter$EventFiringTaskWorker$1.run(DefaultTaskGraphExecuter.java:256) at org.gradle.internal.operations.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:317) at org.gradle.internal.operations.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:309) at org.gradle.internal.operations.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:185) at org.gradle.internal.operations.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:97) at org.gradle.internal.operations.DelegatingBuildOperationExecutor.run(DelegatingBuildOperationExecutor.java:31) at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter$EventFiringTaskWorker.execute(DefaultTaskGraphExecuter.java:249) at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter$EventFiringTaskWorker.execute(DefaultTaskGraphExecuter.java:238) at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$TaskExecutorWorker$1.execute(DefaultTaskPlanExecutor.java:104) at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$TaskExecutorWorker$1.execute(DefaultTaskPlanExecutor.java:98) at org.gradle.execution.taskgraph.DefaultTaskExecutionPlan.execute(DefaultTaskExecutionPlan.java:663) at org.gradle.execution.taskgraph.DefaultTaskExecutionPlan.executeWithTask(DefaultTaskExecutionPlan.java:596) at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$TaskExecutorWorker.run(DefaultTaskPlanExecutor.java:98) at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:63) at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:46) at org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:55) Caused by: java.lang.RuntimeException: Error creating extended parser class: null at org.parboiled.Parboiled.createParser(Parboiled.java:58) at org.pegdown.PegDownProcessor.(PegDownProcessor.java:94) at org.pegdown.PegDownProcessor.(PegDownProcessor.java:63) at org.kordamp.gradle.markdown.MarkdownProcessor.getProcessor(MarkdownProcessor.groovy:122) at org.kordamp.gradle.markdown.MarkdownProcessor$getProcessor.callCurrent(Unknown Source) at org.kordamp.gradle.markdown.MarkdownProcessor.markdownToHtml(MarkdownProcessor.groovy:62) at org.kordamp.gradle.markdown.Conversion.convert(Conversion.groovy:58) at org.kordamp.gradle.markdown.Conversion$convert$0.call(Unknown Source) at org.kordamp.gradle.markdown.MarkdownWorkerImpl$_process_closure1.doCall(MarkdownWorkerImpl.groovy:40) at org.kordamp.gradle.markdown.MarkdownWorkerImpl.process(MarkdownWorkerImpl.groovy:33) at org.kordamp.gradle.markdown.MarkdownWorker$process.call(Unknown Source) at org.kordamp.gradle.markdown.MarkdownToHtmlTask.runTask(MarkdownToHtmlTask.groovy:70) at org.gradle.internal.reflect.JavaMethod.invoke(JavaMethod.java:73) at org.gradle.api.internal.project.taskfactory.StandardTaskAction.doExecute(StandardTaskAction.java:46) at org.gradle.api.internal.project.taskfactory.StandardTaskAction.execute(StandardTaskAction.java:39) at org.gradle.api.internal.project.taskfactory.StandardTaskAction.execute(StandardTaskAction.java:26) at org.gradle.api.internal.AbstractTask$TaskActionWrapper.execute(AbstractTask.java:794) at org.gradle.api.internal.AbstractTask$TaskActionWrapper.execute(AbstractTask.java:761) at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter$1.run(ExecuteActionsTaskExecuter.java:124) at org.gradle.internal.operations.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:317) at org.gradle.internal.operations.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:309) at org.gradle.internal.operations.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:185) at org.gradle.internal.operations.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:97) at org.gradle.internal.operations.DelegatingBuildOperationExecutor.run(DelegatingBuildOperationExecutor.java:31) at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeAction(ExecuteActionsTaskExecuter.java:113) at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions(ExecuteActionsTaskExecuter.java:95) ... 29 more Caused by: java.lang.IllegalStateException at org.objectweb.asm.tree.analysis.BasicInterpreter.(BasicInterpreter.java:65) at org.parboiled.transform.RuleMethodInterpreter.(RuleMethodInterpreter.java:42) at org.parboiled.transform.InstructionGraphCreator.process(InstructionGraphCreator.java:41) at org.parboiled.transform.ParserTransformer.runMethodTransformers(ParserTransformer.java:62) at org.parboiled.transform.ParserTransformer.extendParserClass(ParserTransformer.java:45) at org.parboiled.transform.ParserTransformer.transformParser(ParserTransformer.java:38) at org.parboiled.Parboiled.createParser(Parboiled.java:54) ... 54 more ```

[floscher]

I now replaced this plugin with a custom task for conversion from .md to .html (based on flexmark).

[aalmiray]

Fixed with https://github.com/kordamp/markdown-gradle-plugin/commit/9c221add76c790206b4a529e1872bbf641e881e6