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[patch] fix libstdc++/58839


This change fixes the unique_ptr<void> testcase in the PR while
preserving the extension that we allow initializing a shared_ptr from
a unique_ptr that uses a custom pointer.

I've added a test for that extension, and for assignment of
enable_shared_from this.

2013-10-29  Jonathan Wakely  <jwakely.gcc@gmail.com>

        PR libstdc++/58839
        * include/bits/shared_ptr_base.h
        (__shared_ptr<T>::__shared_ptr(unique_ptr<U,D>&&)): Only use addressof
        when unique_ptr<U,D>::pointer is not a built-in pointer type.
        * testsuite/20_util/shared_ptr/cons/58839.cc: New.
        * testsuite/20_util/enable_shared_from_this/members/assign.cc: New.
        * testsuite/20_util/enable_shared_from_this/members/unique_ptr.cc: New.

Tested x86_64-linux, committed to trunk.

Attachment: patch.txt
Description: Text document


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