[Bug libstdc++/86130] Expect SIGSEGV but program just silently exits

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86130

--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
And they don't test for iostream operations failing?

The program has undefined behaviour, i.e. a bug. Whether it's better to
identify that and treat it as a corrupt stream state (setting badbit, and
optionally throwing an exception) or crash the program depends on the program.
There's no single choice that's correct for all programs.