[arunc]

How/where do you do that?

[johannes1234321]

See https://isocpp.org/std/submit-issue

[tialaramex]

Of course, just because a defect is reported doesn't mean it'll get fixed, or that the fix will be of any use.

The most famous (technically a C defect) is probably DR#260: https://www.open-std.org/jtc1/sc22/wg14/www/docs/dr_260.htm

[vitaut]

You send an email to the Library Working Group chair.