[Bug c++/39803] New: Bogus 'unused value' warning on declarations of non-POD arrays

[lcwu at gcc dot gnu dot org]

When compiling the following program using the mainline GCC (4.5) with -Wunused
flag, we get a bogus "unused value" warning on the array declaration:

$ cat Wunused-14.C
#include <utility>

using std::pair;

int foo() {
  pair<int, const char*> components[3];
  components[0].first = 0;
  return 0;
}

$ g++ -Wunused -c Wunused-14.C 
Wunused-14.C: In function 'int foo()':
Wunused-14.C:6: warning: value computed is not used

Here is the version string of the compiler used:
Target: x86_64-unknown-linux-gnu
gcc version 4.5.0 20090414 (experimental) (GCC)


-- 
           Summary: Bogus 'unused value' warning on declarations of non-POD
                    arrays
           Product: gcc
           Version: 4.5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: lcwu at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39803