[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  ---
Author: paolo
Date: Thu Feb  8 18:54:39 2018
New Revision: 257502

URL: https://gcc.gnu.org/viewcvs?rev=257502=gcc=rev
Log:
/cp
2018-02-08  Paolo Carlini  

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

/testsuite
2018-02-08  Paolo Carlini  

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

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

[paolo.carlini at oracle dot com]

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

Paolo Carlini  changed:

   What|Removed |Added

 Status|NEW |ASSIGNED
 CC|paolo.carlini at oracle dot com|
   Assignee|unassigned at gcc dot gnu.org  |paolo.carlini at oracle 
dot com

--- Comment #3 from Paolo Carlini  ---
Seems doable.

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

[jakub at gcc dot gnu.org]

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

Jakub Jelinek  changed:

   What|Removed |Added

   Priority|P3  |P2

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

[paolo.carlini at oracle dot com]

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

Paolo Carlini  changed:

   What|Removed |Added

 CC||jakub at gcc dot gnu.org,
   ||paolo.carlini at oracle dot com

--- Comment #2 from Paolo Carlini  ---
I'm adding in CC Jakub too.

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

[rguenth at gcc dot gnu.org]

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

Richard Biener  changed:

   What|Removed |Added

   Target Milestone|--- |6.5

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

[msebor at gcc dot gnu.org]

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

Martin Sebor  changed:

   What|Removed |Added

 Status|UNCONFIRMED |NEW
   Last reconfirmed||2018-01-13
 CC||jason at gcc dot gnu.org,
   ||msebor at gcc dot gnu.org
  Known to work||5.4.0
Summary|Spurious|[6/7/8 Regression] Spurious
   |unused-but-set-parameter|-Wunused-but-set-parameter
   |with nullptr|with nullptr
 Ever confirmed|0   |1
  Known to fail||6.4.0, 7.2.0, 8.0

--- Comment #1 from Martin Sebor  ---
Confirmed.  Introduced by r232436 (gcc 6.0.0):

r232436 | jason | 2016-01-15 10:57:07 -0500 (Fri, 15 Jan 2016) | 6 lines

PR c++/69257
* typeck.c (decay_conversion): Don't call mark_rvalue_use for
array/function-to-pointer conversion.  Call
complete_type_or_maybe_complain for lvalue-to-rvalue conversion.
* call.c (convert_like_real): Print call context if
decay_conversion errors.