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* data/skeletons/yacc.c (yyparse): When the scanner returns YYERRCODE, go directly to error recovery (yyerrlab1). However, don't keep the error token as lookahead, that token is too special. * data/skeletons/lalr1.cc: Likewise. * examples/c/bistromathic/parse.y (yylex): Use that feature to report nicely invalid characters. * examples/c/bistromathic/bistromathic.test: Check that. * examples/test: Neutralize gratuitous differences such as rule position. * tests/calc.at: Check that case in C only. The other case seem to be working, but that's an illusion that the next commit will address (in fact, they can enter endless loops, and report the error several times anyway).