[Bug c++/71528] [5 Regression] multiple extern reference declarations produce uninitialized access

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71528

--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Thu Jul  7 12:45:44 2016
New Revision: 238098

URL: https://gcc.gnu.org/viewcvs?rev=238098&root=gcc&view=rev
Log:
        Backported from mainline
        2016-06-14  Jakub Jelinek  <jakub@redhat.com>

        PR c++/71528
        * decl.c (duplicate_decls): For DECL_INITIALIZED_P non-external
        olddecl vars, preserve their TREE_READONLY bit.

        * g++.dg/opt/pr71528.C: New test.

Added:
    branches/gcc-5-branch/gcc/testsuite/g++.dg/opt/pr71528.C
Modified:
    branches/gcc-5-branch/gcc/cp/ChangeLog
    branches/gcc-5-branch/gcc/cp/decl.c
    branches/gcc-5-branch/gcc/testsuite/ChangeLog