[issue31285] a SystemError and an assertion failure in warnings.warn_explicit()

[Serhiy Storchaka]

Serhiy Storchaka <storchaka+cpython at gmail.com> added the comment:

I didn't check. I supposed that the other code can support unicode by 
implicitly converting it to str. But now I see that show_warning() uses 
PyString_AS_STRING() and therefore supports only str. I agree, using 
str.splitlines() would be correct solution.

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue31285>
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