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[PATCH] Fix concatenation bug in filesystem::path


When erasing a trailing empty filename component, the output iterator
was not decremented, causing the next component to be created at the
wrong position.

	* src/filesystem/std-path.cc (path::operator+=(const path&)): Fix
	incorrect treatment of empty filename after trailing slash.
	* testsuite/27_io/filesystem/path/concat/path.cc: Test problem case.

Tested x86_64-linux, committed to trunk.


Attachment: patch.txt
Description: Text document


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