[Bug c++/12697] Redundant duplicate error message

["bangerth at dealii dot org" <gcc-bugzilla at gcc dot gnu dot org>]

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=12697


bangerth at dealii dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |gdr at gcc dot gnu dot org
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|                            |1
           Keywords|                            |diagnostic
   Last reconfirmed|0000-00-00 00:00:00         |2003-10-21 00:19:36
               date|                            |


------- Additional Comments From bangerth at dealii dot org  2003-10-21 00:19 -------
Confirmed. Here's something shorter:
-------------------------------
void Foo(signed char, signed char);
void Foo(unsigned char, unsigned char);

void Foo(int, int);
void Foo(unsigned int, unsigned int);

int main() {
  unsigned char u;
  signed char i;
  Foo(u, i);
}
--------------------------------------

>From 3.3.2 and present mainline we get

g/x> /home/bangerth/bin/gcc-3.3.2/bin/c++ -c x.cc
x.cc: In function `int main()':
x.cc:10: error: ISO C++ says that `void Foo(int, int)' and `void Foo(unsigned
   char, unsigned char)' are ambiguous even though the worst conversion for the
   former is better than the worst conversion for the latter
x.cc:10: error: ISO C++ says that `void Foo(int, int)' and `void Foo(signed
   char, signed char)' are ambiguous even though the worst conversion for the
   former is better than the worst conversion for the latter
g/x>
g/x>
g/x> /home/bangerth/bin/gcc-3.4-pre/bin/c++ -c x.cc
x.cc: In function `int main()':
x.cc:10: error: ISO C++ says that these are ambiguous, even though the worst
conversion for the first is better than the worst conversion for the second:
x.cc:4: note: candidate 1: void Foo(int, int)
x.cc:2: note: candidate 2: void Foo(unsigned char, unsigned char)
x.cc:10: error: ISO C++ says that these are ambiguous, even though the worst
conversion for the first is better than the worst conversion for the second:
x.cc:4: note: candidate 1: void Foo(int, int)
x.cc:1: note: candidate 2: void Foo(signed char, signed char)

Note the message duplication. This seems to be the case ever since the
message first appears with gcc3.0, 2.95 accepted the code silently.

W.