[committed] libstdc++: Fix directory_iterator exception specification

[Jonathan Wakely via Gcc-patches]

libstdc++-v3/ChangeLog:

        * src/c++17/fs_dir.cc (fs::directory_iterator::operator*):
        Add noexcept. Do not throw on precondition violation.

Tested x86_64-linux. Committed to trunk.


commit 044b04348cfdc12848f1c6d5a8f45087c3075390
Author: Jonathan Wakely <jwak...@redhat.com>
Date:   Tue Oct 27 14:49:37 2020

    libstdc++: Fix directory_iterator exception specification
    
    libstdc++-v3/ChangeLog:
    
            * src/c++17/fs_dir.cc (fs::directory_iterator::operator*):
            Add noexcept. Do not throw on precondition violation.

diff --git a/libstdc++-v3/src/c++17/fs_dir.cc b/libstdc++-v3/src/c++17/fs_dir.cc
index 784df2de53f..4932330de52 100644
--- a/libstdc++-v3/src/c++17/fs_dir.cc
+++ b/libstdc++-v3/src/c++17/fs_dir.cc
@@ -148,12 +148,8 @@ directory_iterator(const path& p, directory_options 
options, error_code* ecptr)
 }
 
 const fs::directory_entry&
-fs::directory_iterator::operator*() const
+fs::directory_iterator::operator*() const noexcept
 {
-  if (!_M_dir)
-    _GLIBCXX_THROW_OR_ABORT(filesystem_error(
-         "non-dereferenceable directory iterator",
-         std::make_error_code(errc::invalid_argument)));
   return _M_dir->entry;
 }