[Bug c++/49482] New: [regression][4.6.1-RC-20110620][C++0x] unused parameter warning on lambda in function template

[gintensubaru at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49482

           Summary: [regression][4.6.1-RC-20110620][C++0x] unused
                    parameter warning on lambda in function template
           Product: gcc
           Version: 4.6.1
            Status: UNCONFIRMED
          Severity: minor
          Priority: P3
         Component: c++
        AssignedTo: unassig...@gcc.gnu.org
        ReportedBy: gintensub...@gmail.com


testsuite (bug.cc):

template<class T>
void f() {
  []( bool b ){ return b; };
}

int main()
{
  f<int>();
}


message:

bug.cc: In static member function 'static bool f() [with T =
int]::<lambda(bool)
>::_FUN(bool)':
bug.cc:3:4:   instantiated from 'f() [with T = int]::<lambda(bool)>'
bug.cc:3:3:   instantiated from 'void f() [with T = int]'
bug.cc:8:10:   instantiated from here
bug.cc:3:14: warning: parameter 'b' set but not used
[-Wunused-but-set-parameter
]


version:

gcc-4.6.1-RC-20110620


note:

gcc-4.6-20110527 doesn't raise such a warning.