On Wed, 31 Mar 2010, tys lefering wrote:
> Using bison with wrapped malloc/free and testing
> it doing intentionally unusual things with the
> possible settings in bison generated yacc parser
> did not found a segfault situation but came across:
>
> /* set initial size of parser stack */
> #define YYINITDEPTH 0
The manual says YYINITDEPTH must be a positive integer.
> it is easy to fix in yyparse():
>
> yystacksize = YYINITDEPTH;
> if (!yystacksize) { yystacksize = 1; }
> YYDPRINTF ((stderr, "Starting parse\n"));
This change is not sufficient to handle YYINITDEPTH=0 because YYINITDEPTH
is used as the size of several arrays. At most, I could see throwing a
#error if YYINITDEPTH=0, but not in 2.4.3, where we're still supposedly
supporting K&R.
