search

tunnelvisionlabs / antlrworks2

Tunnel Vision Labs' ANTLRWorks 2 IDE
http://tunnelvisionlabs.com/products/antlrworks
Other
48 stars 21 forks source link

NullPointerException when trying Interpret parser... #35

Open oyse opened 10 years ago

oyse commented 10 years ago

For at least one file a NullPointerException is thrown when trying to do Interpret parser...

java.lang.NullPointerException
    at org.antlr.v4.runtime.DiagnosticErrorListener.getConflictingAlts(DiagnosticErrorListener.java:175)
    at org.antlr.works.editor.grammar.debugger.StatisticsParserErrorListener.reportAmbiguity(StatisticsParserErrorListener.java:30)
    at org.antlr.v4.runtime.ProxyParserErrorListener.reportAmbiguity(ProxyParserErrorListener.java:55)
    at org.antlr.v4.runtime.atn.ParserATNSimulator.reportAmbiguity(ParserATNSimulator.java:2365)
    at org.antlr.v4.runtime.atn.ParserATNSimulator.execATN(ParserATNSimulator.java:812)
    at org.antlr.works.editor.grammar.debugger.StatisticsParserATNSimulator.execATN(StatisticsParserATNSimulator.java:144)
    at org.antlr.v4.runtime.atn.ParserATNSimulator.execDFA(ParserATNSimulator.java:556)
    at org.antlr.works.editor.grammar.debugger.StatisticsParserATNSimulator.execDFA(StatisticsParserATNSimulator.java:107)
    at org.antlr.v4.runtime.atn.ParserATNSimulator.adaptivePredict(ParserATNSimulator.java:423)
    at org.antlr.v4.runtime.atn.ParserATNSimulator.adaptivePredict(ParserATNSimulator.java:373)
    at org.antlr.works.editor.grammar.debugger.StatisticsParserATNSimulator.adaptivePredict(StatisticsParserATNSimulator.java:99)
    at org.antlr.v4.runtime.ParserInterpreter.visitState(ParserInterpreter.java:185)
    at org.antlr.works.editor.grammar.debugger.ParserDebuggerReferenceAnchorsParserTask$TracingParserInterpreter.visitState(ParserDebuggerReferenceAnchorsParserTask.java:137)
    at org.antlr.v4.runtime.ParserInterpreter.parse(ParserInterpreter.java:157)
    at org.antlr.works.editor.grammar.debugger.ParserDebuggerReferenceAnchorsParserTask.parse(ParserDebuggerReferenceAnchorsParserTask.java:115)
    at org.antlr.netbeans.parsing.spi.impl.ParserTaskManagerImpl$UpdateDataCallable.callImpl(ParserTaskManagerImpl.java:662)
    at org.antlr.netbeans.parsing.spi.impl.ParserTaskManagerImpl$UpdateDataCallable.callImpl(ParserTaskManagerImpl.java:618)
[catch] at org.antlr.netbeans.parsing.spi.impl.ParserTaskManagerImpl$UpdateCallable.call(ParserTaskManagerImpl.java:607)
    at java.util.concurrent.FutureTask.run(FutureTask.java:262)
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:178)
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:292)
    at org.antlr.netbeans.parsing.spi.impl.ParserTaskManagerImpl$PriorityInsertionRunnableScheduledFuture.run(ParserTaskManagerImpl.java:821)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at java.lang.Thread.run(Thread.java:744)
sharwell commented 10 years ago

Can you include a sample grammar and input file which demonstrates this problem?

amirico commented 10 years ago

It happens to me as well now. Even with the basic grammar provided in the very first example on "The definitive ANTLR 4 reference. (I am working on a HP COMPAQ Evo N619c. Before I moved to this laptop it never happened.)

This is the exception -

Exception in thread "main" java.lang.NullPointerException at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301) at java.lang.ClassLoader.loadClass(ClassLoader.java:358) at org.antlr.v4.runtime.misc.TestRig.process(TestRig.java:157) at org.antlr.v4.runtime.misc.TestRig.main(TestRig.java:142)