cmath.acosh(complex('±0+nanj')) should return complex('nan±pi/2j') (imaginary part sign is unspecified) #121889
Description
Bug report
Bug description:
As per C11 DR#471 (adjusted resolution accepted for C17). See glibc patch: https://sourceware.org/git/?p=glibc.git;a=commitdiff;h=5244527da1bfa751492e146d3e6ae128c59bfcc4
Currently, imaginary part is nan.
CPython versions tested on:
CPython main branch
Operating systems tested on:
No response