[Bug c++/47783] [4.6 Regression] Warning 'set but not used' [-Wunused-but-set-parameter] incorrectly issued for update through reference wrapper

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47783

--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-02-17 20:44:16 UTC ---
Author: jakub
Date: Thu Feb 17 20:44:14 2011
New Revision: 170255

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=170255
Log:
    PR c++/47783
    * cvt.c (convert_from_reference): Call mark_exp_read.

    * g++.dg/warn/Wunused-parm-4.C: New test.

Added:
    trunk/gcc/testsuite/g++.dg/warn/Wunused-parm-4.C
Modified:
    trunk/gcc/cp/ChangeLog
    trunk/gcc/cp/cvt.c
    trunk/gcc/testsuite/ChangeLog