[Bug libstdc++/105580] [13/14/15/16 Regression] warning "potential null pointer dereference" raised when using istreambuf_iterator and any "-O" flag

Fri, 27 Feb 2026 23:48:19 -0800 

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105580

--- Comment #13 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Tomasz Kaminski <[email protected]>:

https://gcc.gnu.org/g:8758503918a91dacff4dbc7126eced21787fbfc9

commit r16-7824-g8758503918a91dacff4dbc7126eced21787fbfc9
Author: Tomasz KamiÅski <[email protected]>
Date:   Fri Feb 27 19:55:19 2026 +0100

    libstdc++: Add test for -Wnull-deference in istream_iterator [PR105580]

            PR libstdc++/105580

    libstdc++-v3/ChangeLog:

            * testsuite/24_iterators/istreambuf_iterator/105580.cc: New test.

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