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[Bug c/82755] New: Misleading error message "incompatible type for argument"


https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82755

            Bug ID: 82755
           Summary: Misleading error message "incompatible type for
                    argument"
           Product: gcc
           Version: 7.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: Keith.S.Thompson at gmail dot com
  Target Milestone: ---

I'm using gcc 7.2.0-8ubuntu3 on Ubuntu 17.10, x86_64.

$ cat c.c
void f(double a) { }

int main(void) {
    int i;
    f(&i);
}
$ gcc -c -std=c11 -pedantic c.c
c.c: In function ‘main’:
c.c:5:7: error: incompatible type for argument 1 of ‘f’
     f(&i);
       ^
c.c:1:6: note: expected ‘double’ but argument is of type ‘int *’
 void f(double a) { }
      ^

The problem is the phrase "incompatible type" in the error message. It's true
that the types int* and double are incompatible, but that's not why the call
is invalid. Types int and double are also incompatible (as the C standard
defines the term), but the call
    f(42);
would be valid.

I suggest changing "incompatible type" to "incorrect type".

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