https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85108
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
Summary|[7/8 Regression] Incorrect |[7 Regression] Incorrect
|warning for constexpr |warning for constexpr
|lambda with |lambda with
|-Wunused-but-set-variable |-Wunused-but-set-variable
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Testcase without includes:
// PR c++/85108
// { dg-do compile { target c++17 } }
// { dg-options "-Wunused-but-set-variable" }
int
main ()
{
auto constexpr add = [] (auto a, auto b) { return a + b; }; // { dg-bogus
"set but not used" }
auto test_lambda = [&] () { return add (2, 2); };
return test_lambda () - 4;
}
With -std=c++17 -Wunused-but-set-variable we don't warn about this anymore
starting with r253266.
The testcase is rejected with -std=c++14 starting with r247814 aka PR70979 fix.
