[antlr-interest] ANTLR3 vcab import exception

[Oliver Zeigermann]

2005/10/18, Terence Parr <parrt at cs.usfca.edu>:
>
> On Oct 18, 2005, at 12:50 PM, Jim Idle wrote:
>
> > Anyone got any thoughts on this (ANTLR 3 built from source code as
> > of Sunday evening, JDK 1.5 Update 5)
> >
> > problem reading token vocabulary file cmql.tokens:
> > java.lang.NullPointerException
> > org.antlr.tool.AssignTokenTypesWalker.importTokenVocab(Unknown Source)
> > org.antlr.tool.AssignTokenTypesWalker.option(Unknown Source)
> > org.antlr.tool.AssignTokenTypesWalker.optionsSpec(Unknown Source)
> > org.antlr.tool.AssignTokenTypesWalker.grammarSpec(Unknown Source)
> > org.antlr.tool.AssignTokenTypesWalker.grammar(Unknown Source)
> > org.antlr.tool.Grammar.setGrammarContent(Unknown Source)
> > org.antlr.Tool.process(Unknown Source)
> > org.antlr.Tool.main(Unknown Source)
>
> I wonder why it says "unknown source"?  Perhaps 1.5 can't read
> old .class files completely?  That would be odd...if you can get me a
> line number i'll look it up ;)

This is most likely because the sources have been compiled without
debug and/or line number options.

Oliver