Re: Text search segmentation fault

Gregory Stark <stark@enterprisedb.com> writes:
> Maybe I'm missing something but I don't understand how this fixes the problem.
> s is a "char*" so type punning it to an unsigned char * before dereferencing
> it is really the same as casting it to unsigned char directly

No, it isn't.  If char is signed then you'll get quite different results
from a high-bit-set byte value, because sign extension will happen
before the value is reinterpreted as unsigned.

            regards, tom lane