pkg/60257: devel/py-numpy: ctype(3) abuse

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>Number:         60257
>Category:       pkg
>Synopsis:       devel/py-numpy: ctype(3) abuse
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    pkg-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed May 13 02:00:00 +0000 2026
>Originator:     Taylor R Campbell
>Release:        pkgsrc-current, math/py-numpy 2.4.4
>Organization:
The NumpyBSDumpty Array Subscription
>Environment:
>Description:
[254/461] Compiling C object numpy/_core/_rational_tests.so.p/src_umath__rational_tests.c.o
In file included from /usr/include/ctype.h:97,
                 from /home/riastradh/pkgsrc/current/work/math/py-numpy/work/.bu
ildlink/include/python3.11/unicodeobject.h:58,                                                   from /home/riastradh/pkgsrc/current/work/math/py-numpy/work/.buildlink/include/python3.11/Python.h:51,
                 from ../numpy/_core/src/umath/_rational_tests.c:3:
../numpy/_core/src/umath/_rational_tests.c: In function 'pyrational_new':
../numpy/_core/src/umath/_rational_tests.c:416:34: warning: array subscript has type 'char' [-Wchar-subscripts]
  416 |                     if (!isspace(*p)) {
      |                                  ^

>How-To-Repeat:
build math/py-numpy
>Fix:
1. convert char to unsigned char first
2. check for other abuse in the vicinity