To detect string to integer conversion overflow, PCRE2 SVN 463 adds a
few lines to pcre2test.c which test if return values from strtoul() are
*greater* than UINT32_MAX or ULONG_MAX.
At least on some systems, however, these comparisons can never be true.
According to the documentation, overflow causes strtoul() to return
*exactly* these values, but not greater:
http://man7.org/linux/man-pages/man3/strtoul.3.html
As the documentation suggests, the testing should be for *equality* to
these constants. Instead, or in addition, errno may be checked against
ERANGE.
Likewise for strtol():
http://man7.org/linux/man-pages/man3/strtol.3.html
Ralf
