[Bug libstdc++/64467] [5 Regression] 28_regex/traits/char/isctype.cc and wchar_t/isctype.cc

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64467

--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Almost certainly r217066.

Is this a newlib target? I would expect to see the same failure for all newlib
targets, as I defined std::ctype_base::blank to be equal to
std::ctype_base::space for newlib (and any libc where I couldn't determine the
right bitmask for the [:blank:] character class) and the [:space:] class
includes newline.