http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48414
Summary: Missing "uninitialized" warning in simple switch Product: gcc Version: 4.5.2 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c AssignedTo: unassig...@gcc.gnu.org ReportedBy: sarbalap+gccbugzi...@gmail.com Compiling the following code does not produce any warning, even if the "ret" variable would be used uninitialized in most cases: #include <stdio.h> int main(void) { int ret; printf("Input something: "); fflush(stdout); int c = getchar(); switch (c) { case 'a': ret = 0; break; default: /* ret still uninitialized. */ break; } return ret; } Compiled with "gcc -Wall -o uninitialized uninitialized.c" under GCC 4.5.2.