[Bug libstdc++/86967] New: time_get fails to parse abbreviated weekday with %A format string

[mark.melton at notlem dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86967

            Bug ID: 86967
           Summary: time_get fails to parse abbreviated weekday with %A
                    format string
           Product: gcc
           Version: 8.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libstdc++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: mark.melton at notlem dot com
  Target Milestone: ---

Created attachment 44546
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44546&action=edit
Small test case showing the bug.

The std::time_get::get(...) function fails to parse an abbreviated weekday name
when using the "%A" format specifier. It works corrected for the "%a" format
specifier where the two specifiers are simply synonyms of one another.

Using both "%A" and "%a", the function successfully parses the unabbreviated
weekday name.

See the attached short test case.

I have tested under both 8.2.0 and 7.3.0.

cheers,
mark