[Bug libstdc++/86597] directory_entry::exist et al forget to clear the error_code.

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86597

--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Wed Aug  8 13:09:19 2018
New Revision: 263397

URL: https://gcc.gnu.org/viewcvs?rev=263397&root=gcc&view=rev
Log:
PR libstdc++/86597 directory_entry observers should clear error_code

        PR libstdc++/86597
        * include/bits/fs_dir.h (directory_entry::_M_file_type(error_code&)):
        Clear error_code when cached type is used.
        * testsuite/27_io/filesystem/directory_entry/86597.cc: New test.

Added:
    trunk/libstdc++-v3/testsuite/27_io/filesystem/directory_entry/
    trunk/libstdc++-v3/testsuite/27_io/filesystem/directory_entry/86597.cc
Modified:
    trunk/libstdc++-v3/ChangeLog
    trunk/libstdc++-v3/include/bits/fs_dir.h