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[PATCH] PR libstdc++/82777 fix path normalization for dot-dot

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: Wed, 1 Nov 2017 17:13:23 +0000
Subject: [PATCH] PR libstdc++/82777 fix path normalization for dot-dot
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This fixes a bug in the implementation of the normalization algo. I
messed up a case with adjacent ../.. elements, because it's written to
work in a single pass, rather than applying each of the rules in turn,
creating loads of temporaries and reallocations.

	PR libstdc++/82777
	* src/filesystem/std-path.cc (path::lexically_normal): Remove dot-dot
	elements correctly.
	* testsuite/27_io/filesystem/path/generation/normal.cc: Add testcase.
	* testsuite/util/testsuite_fs.h (compare_paths): Improve exception
	text.

Tested powerpc64le-linux, committed to trunk.

Attachment: patch.txt
Description: Text document

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