[Bug middle-end/63518] missing Wuninitialized warning independent of order of arguments

[msebor at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63518

Martin Sebor <msebor at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2019-02-03
                 CC|                            |msebor at gcc dot gnu.org
            Version|unknown                     |4.7.4
     Ever confirmed|0                           |1

--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
Confirmed.

Both Clang and with -O also GCC 4.7 and later warn on one of the two instances
of the problem.  Clang on line 15:

$ clang -S -Wall pr63518.C
pr63518.C:16:9: warning: variable 't' is uninitialized when used here
      [-Wuninitialized]
   wait(t, setTimeout(t));
        ^
pr63518.C:15:12: note: initialize the variable 't' to silence this warning
  Timeout t;
           ^
            = 0
1 warning generated.


and GCC on line 23:

$ gcc -O -S -Wall pr63518.C
pr63518.C: In function ‘void bar()’:
pr63518.C:23:9: warning: ‘t’ is used uninitialized in this function
[-Wuninitialized]
   23 |    wait2(setTimeout(t),t);
      |    ~~~~~^~~~~~~~~~~~~~~~~