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When a literal string is used to define two different tokens,

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`bison -v' segfaults.
Reported by Piotr Gackiewicz, and fixed by Neil Booth.
* tests/regression.m4: New file.
Include the core of the sample provided by Piotr Gackiewicz.
* src/reader.c (parse_token_decl): Diagnose bad cases, and proceed
properly.
This commit is contained in:
Akim Demaille
2000-10-04 11:52:53 +00:00
parent a9e64249c8
commit 8e03724b11
6 changed files with 58 additions and 11 deletions
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28
src/reader.c
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@@ -372,17 +372,25 @@ parse_token_decl (symbol_class what_is, symbol_class what_is_not)
}
else if (token == IDENTIFIER && *symval->tag == '\"' && symbol)
{
if (symval->alias)
warn (_("symbol `%s' used more than once as a literal string"),
symval->tag);
else if (symbol->alias)
warn (_("symbol `%s' given more than one literal string"),
symbol->tag);
else
{
symval->class = token_sym;
symval->type_name = typename;
symval->user_token_number = symbol->user_token_number;
symbol->user_token_number = SALIAS;
symval->alias = symbol;
symbol->alias = symval;
/* symbol and symval combined are only one symbol */
nsyms--;
}
translations = 1;
symval->class = token_sym;
symval->type_name = typename;
symval->user_token_number = symbol->user_token_number;
symbol->user_token_number = SALIAS;
symval->alias = symbol;
symbol->alias = symval;
symbol = NULL;
nsyms--; /* symbol and symval combined are only one symbol */
symbol = NULL;
}
else if (token == IDENTIFIER)
{