defined YYERROR_VERBOSE, but still got only "parse error"

Hi,
This is my first time using Bison and I run into the following
problem: I defined YYERROR_VERBOSE (and confirmed it is defined into
the generated .c file by inserting a printf there) but I still got
only the usual "parse error" message when an error occurs.


I've looked into the code that actully generates the error message:
if (count < 5)
{
count = 0;
for (x = (yyn < 0 ? -yyn : 0);
x < (sizeof(yytname) / sizeof(char *)); x++)
if (yycheck[x + yyn] == x)
{
strcat(msg, count == 0 ? ", expecting `" : " or `");
strcat(msg, yytname[x]);
strcat(msg, "'");
count++;
}
}




and found out that count == 5 from the beginning; replacing
if (count < 5)
with
if (1)
resulted in an informative error message ("expected" ... "or" ...).


What's the problem? Do I need to set up other variables as well, or
what?


Thanks in advance,
Sorin Gherman

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