https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87038

Jonathan Wakely <redi at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |diagnostic
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2018-08-21
     Ever confirmed|0                           |1
           Severity|normal                      |enhancement

--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Confirmed. Clang warns consistently, even at -O0:

87038.c:5:30: warning: variable 'foo' is used uninitialized whenever switch
case is taken [-Wsometimes-uninitialized]
                        case 0:
                             ^
87038.c:6:55: note: uninitialized use occurs here
                                printf("foo is %d\n", foo);
                                                      ^~~
87038.c:4:25: note: variable 'foo' is declared here
                        int foo = 3;
                        ^
1 warning generated.

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