[Bug c++/83806] [6/7/8 Regression] Spurious -Wunused-but-set-parameter with nullptr

[paolo at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83806

--- Comment #4 from paolo at gcc dot gnu.org <paolo at gcc dot gnu.org> ---
Author: paolo
Date: Thu Feb  8 18:54:39 2018
New Revision: 257502

URL: https://gcc.gnu.org/viewcvs?rev=257502&root=gcc&view=rev
Log:
/cp
2018-02-08  Paolo Carlini  <paolo.carlini@oracle.com>

        PR c++/83806
        * typeck.c (decay_conversion): Use mark_rvalue_use for the special
        case of nullptr too.

/testsuite
2018-02-08  Paolo Carlini  <paolo.carlini@oracle.com>

        PR c++/83806
        * g++.dg/warn/Wunused-parm-11.C: New.

Added:
    trunk/gcc/testsuite/g++.dg/warn/Wunused-parm-11.C
Modified:
    trunk/gcc/cp/ChangeLog
    trunk/gcc/cp/typeck.c
    trunk/gcc/testsuite/ChangeLog