[antlr-interest] ANTLR 3 diagnostics

[Terence Parr]

Hi Chap, i'm neck deep in some bugs at moment...but, please grab  
latest build

http://www.antlr.org/download/build/antlr-2007-12-27.12.tar.gz

and run org.antlr.Tool from command line.  Might give you better  
joy...if not, lemme know...
Ter
On Dec 27, 2007, at 2:51 PM, J Chapman Flack wrote:

>
> I have an ANTLR 2 combined grammar (that wasn't finished, but
> did compile without warnings under ANTLR 2), converted
> to an ANTLR 3 combined grammar using v2v3.
>
> Now the v3 org.antlr.Tool gives the following stack
> overflow, and I am seeking suggestions for any reasonably
> effective way to diagnose what rule(s) in the grammar may
> be implicated:
>
> Exception in thread "main" java.lang.StackOverflowError
>        at  
> org.antlr.analysis.NFAConfiguration.equals(NFAConfiguration.java:108)
>        at java.util.HashMap.getEntry(HashMap.java:349)
>        at java.util.HashMap.containsKey(HashMap.java:335)
>        at java.util.HashSet.contains(HashSet.java:184)
>        at  
> org.antlr.analysis.NFAToDFAConverter.closureIsBusy(NFAToDFAConverter.
> java:817)
>        at  
> org.antlr.analysis.NFAToDFAConverter.closure(NFAToDFAConverter.java: 
> 632)
>        at  
> org.antlr.analysis.NFAToDFAConverter.closure(NFAToDFAConverter.java: 
> 762)
>        at  
> org.antlr.analysis.NFAToDFAConverter.closure(NFAToDFAConverter.java: 
> 727)
>        at  
> org.antlr.analysis.NFAToDFAConverter.closure(NFAToDFAConverter.java: 
> 727)
>        at  
> org.antlr.analysis.NFAToDFAConverter.closure(NFAToDFAConverter.java: 
> 727)
>        at  
> org.antlr.analysis.NFAToDFAConverter.closure(NFAToDFAConverter.java: 
> 762)
>        at  
> org.antlr.analysis.NFAToDFAConverter.closure(NFAToDFAConverter.java: 
> 727)
>        at  
> org.antlr.analysis.NFAToDFAConverter.closure(NFAToDFAConverter.java: 
> 727)
>        at  
> org.antlr.analysis.NFAToDFAConverter.closure(NFAToDFAConverter.java: 
> 727)
>        at  
> org.antlr.analysis.NFAToDFAConverter.closure(NFAToDFAConverter.java: 
> 762)
>
>
> antlrWorks does not display any red for this grammar, though it does
> pop up a dialog box saying it thinks the grammar isn't v3, for reasons
> undisclosed. However, all the Generate and View Code options in
> antlrWorks do send the same stack dump to stderr, and fail to generate
> anything. Is there any feature in antlrWorks that can be used to  
> narrow
> the search for the problem?
>
> Thanks,
> -Chap