[Bug libstdc++/112314] Missing index assertions in basic_string_view

[redi at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112314

--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Created attachment 56494
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=56494&action=edit
Check [ptr,end) and [ptr,ptr+n) ranges with _GLIBCXX_ASSERTIONS

With this change we could add:

__glibcxx_requires_string_len(__str, __len);

to the string_view constructor.

We could include checks for __len == 0 || __str != nullptr and PTRDIFF_MAX too.