A Parser/scanner bug has been introduced in lastest revision.
We used to be able to successfully parse rubygems-1.0.1\setup.rb but it now raises an assertion error in SourceSpan::ValidateLocations. The problem lies in the Parser::MergeLocations method which I believe needs to be able to deal with the case where the end span lies before the start span. This occurs when there is a production with an empty RHS. Such a scenario should produce a span of width 0. I also note that the arguments to MergeLocation on line 350 of GPPG.cs have been reversed - I'm not sure that is correct. Cheers, Wayne.
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