http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51531
Bug #: 51531 Summary: bool conversion to pointer should warn Classification: Unclassified Product: gcc Version: 4.6.2 Status: UNCONFIRMED Severity: minor Priority: P3 Component: c++ AssignedTo: unassig...@gcc.gnu.org ReportedBy: tutu...@gmail.com /* clang 3.1 (trunk 145840) warns bool-convert.cpp:12:14: warning: initialization of pointer of type 'int *' to null from a constant boolean expression [-Wbool-conversions] int *p = false; ^~~~~ */ int main() { int *p = false; return !!p; }