Errors in lex and yacc

Does anyone have little (i.e. minimal) examples for lex and yacc input
that expose errors in lex or yacc? That is, are there nice little examples
of input that cause lex or yacc to produce a wrong scanner or parser, or
cause them to terminate with an error?


You can mail to me, I will summarize anything interesting to the net.


Thanks!
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Debora Weber-Wulff dww@inf.fu-berlin.de
ZI Fachdidaktiken, Did. der Informatik +49 30 838 6334
Habelschwerdter Allee 45
D-W-1000 Berlin 33
[A bug in some versions of yacc is referred to in messages 88-10-004 and
88-10-005. -John]
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