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[PATCH] Fix directory_iterator handling of DT_UNKNOWN

From: Jonathan Wakely <jwakely at redhat dot com>
To: libstdc++ at gcc dot gnu dot org, gcc-patches at gcc dot gnu dot org
Date: Fri, 5 Apr 2019 17:56:45 +0100
Subject: [PATCH] Fix directory_iterator handling of DT_UNKNOWN

We need to handle DT_UNKNOWN earlier, not only during directory
recursion, so that the cached file_type value in the directory_entry
won't be used.

	* src/c++17/fs_dir.cc (_Dir::advance(bool, error_code&)): Handle
	d_type == DT_UNKNOWN immediately.
	(_Dir::should_recurse(bool, error_code&)): Remove file_type::unknown
	handling here.
	* testsuite/27_io/filesystem/iterators/caching.cc: New test.

Tested powerpc64le-linux, committed to trunk.

Attachment: patch.txt
Description: Text document

Follow-Ups:
- Re: [PATCH] Fix directory_iterator handling of DT_UNKNOWN
  - From: Christophe Lyon

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