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[PATCH] PR libstdc++/86658 fix __niter_wrap to not copy invalid iterators

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: Tue, 24 Jul 2018 21:49:13 +0100
Subject: [PATCH] PR libstdc++/86658 fix __niter_wrap to not copy invalid iterators

An output iterator passed as the unused first argument to __niter_wrap
might have already been invalidated, so don't copy it.

	PR libstdc++/86658
	* include/bits/stl_algobase.h (__niter_wrap<_Iterator>): Pass unused
	parameter by reference, to avoid copying invalid iterators.
	* testsuite/25_algorithms/copy/86658.cc: New test.

Tested powerpc64le-linux, committed to trunk.

Attachment: patch.txt
Description: Text document

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