Yukihiro "Matz" Matsumoto 27c9037d48 bigint.c: fix FPE caused by inconsistent zero sign state ...

Fix two functions that could create bigints with sn != 0 but value of 0:

- mpz_mod_limb: single-limb case set r->sn = x->sn even when result was 0
- mpz_mul_2exp: set z->sn = sn unconditionally after zero-producing ops

This inconsistent state caused GCD loop (!zero_p(&b)) to continue with
a zero divisor, eventually causing FPE in mpz_mod_limb with m = 0.

Co-authored-by: Claude <noreply@anthropic.com>

2025-12-29 23:39:30 +09:00

..

bigint.c

bigint.c: fix FPE caused by inconsistent zero sign state

2025-12-29 23:39:30 +09:00

bigint.h

misc: fix spelling

2025-05-14 02:01:02 +10:00