[Octave-bug-tracker] [bug #55547] libstdc++ assertion failure when built with -D_GLIBCXX_ASSERTIONS=1

[Mike Miller]

Follow-up Comment #5, bug #55547 (project octave):

I agree we can take our time doing this correctly and thoroughly on the
default branch.

I will make another build with this and do some tests. I believe I had
examples that worked with a complex NaN in either the base or exponent, but
maybe it was exponent only.

The relevant C++ functions are the 'std::pow' overrides that take mixed
complex/non-complex arguments, both 'std::pow(const T&, const
std::complex<T>&)' and 'std::pow(const std::complex<T>&, const T&)' call
'std::polar', which may trigger this assertion. Octave does not call
'std::polar' directly anywhere.

There _are_ other calls to 'std::pow' sprinkled throughout Octave's code base,
especially in some of the audio and graphics functions, but they are probably
much less likely to be passing a complex NaN argument.

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