bug in __gmp_replacement_vsnprintf

[Vincent Lefevre]

On 2023-08-21 10:59:13 +0200, Paul Zimmermann wrote:
> here is a small program that exhibits the bug (for example on gcc231):
[...]

An OpenBSD 7 machine, and this is due to the fact that %n is
no longer supported by the system *printf functions, so that
GMP uses __gmp_replacement_vsnprintf.

See also in the archives:

https://gmplib.org/list-archives/gmp-bugs/2022-October/005200.html
https://gmplib.org/list-archives/gmp-bugs/2023-January/005230.html

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