[Bug c/55096] New: Wconversion-nul does not work in C

[manu at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55096

             Bug #: 55096
           Summary: Wconversion-nul does not work in C
    Classification: Unclassified
           Product: gcc
           Version: 4.8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: manu@gcc.gnu.org


From: http://blog.llvm.org/2011/05/c-at-google-here-be-dragons.html

#include <stdbool.h>
bool foo(void);
bool * ProcessRequest(bool *charge_acct) {
  if (foo()) {
    charge_acct = false;
  }
  return charge_acct;
}

gcc -Wall -Wconversion -Wextra: silence :-(

g++
test2.cc:5:17: warning: converting ‘false’ to pointer type ‘bool*’
[-Wconversion-null]
     charge_acct = false;
                 ^

clang/clang++

test2.cc:5:19: warning: initialization of pointer of type 'bool *' to null from
a constant boolean expression [-Wbool-conversion]
    charge_acct = false;
                  ^~~~~