src/error.c now scores 81.4%: 245 of 301 mutants killed, 211 by a
failing test, 24 by failing to compile, and 10 by hanging the suite.
The population grew by 8 with akerr_exit(), and all 8 die, as do the 4
in akerr_default_handler_unhandled_error() -- no survivor anywhere in
either function.
Two of those are worth naming. Mutating the guard to status < 1 (the
sentinel-for-zero behaviour this library deliberately does not have) and
mutating the NULL-context exit(1) to exit(0) both die, so the tests pin
the two ways an exit could start claiming success rather than just the
one that was broken.
That moves the default handler out of the "needs a subprocess test"
survivor category noted here: it has one now. The default *logger* is
still in it -- every other test swaps in the capturing logger, so
nothing watches what the real one writes to stderr.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Andrew Kesterson
076b80c846
