[antlr-interest] ANTLRWorks - Java null pointer exception
Vincent De Groote
vdg.encelade at gmail.com
Sun Dec 12 13:48:18 PST 2010
Hello,
I downloaded today the ANTLRWORKS-1.4.1 package (antlrworks-1.4.1.jar).
I started the jar file with
java -jar ../Downloads/antlrworks-1.4.1.jar
When I use the sample expr grammar found on antlr site, the debugger
stops working a few steps after the beginning with java null pointer
exceptions on the console screen:
[---- CONSOLE OUTPUT
--------------------------------------------------------------------------]
Checking Grammar expr.g...
Note: /home/vdg/antlr-test/output/exprParser.java uses unchecked or
unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
Note: /home/vdg/antlr-test/output/exprParser.java uses unchecked or
unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
java.lang.NullPointerException
java.lang.NullPointerException
at
org.antlr.runtime.debug.RemoteDebugEventSocketListener.dispatch(RemoteDebugEventSocketListener.java:275)
at
org.antlr.runtime.debug.RemoteDebugEventSocketListener.eventHandler(RemoteDebugEventSocketListener.java:176)
at
org.antlr.runtime.debug.RemoteDebugEventSocketListener.run(RemoteDebugEventSocketListener.java:472)
at java.lang.Thread.run(Thread.java:636)
[---- CONSOLE OUTPUT: end
--------------------------------------------------------------------------]
I have the same result with another grammar I downloaded from the site.
Any idea ?
Thanks for your help
Vincent De Groote
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