https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63543
Bug ID: 63543
Summary: incomplete type error should suppress duplicates
Product: gcc
Version: 4.9.2
Status: UNCONFIRMED
Severity: enhancement
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: andi-gcc at firstfloor dot org
For a test case like this
struct undefined;
int f(struct undefined *f)
{
int x = f->a;
return x + f->a + f->b;
}
tmissing-type.c: In function 'f':
tmissing-type.c:5:11: error: dereferencing pointer to incomplete type
int x = f->a;
^
tmissing-type.c:6:14: error: dereferencing pointer to incomplete type
return x + f->a + f->b;
^
tmissing-type.c:6:21: error: dereferencing pointer to incomplete type
return x + f->a + f->b;
gcc outputs three different errors for each reference of the undefined type.
It would be better if it remembered that it already gave an error for
referencing that type and suppress the later errors (similar to undefined
symbols). This would avoid cascading errors.
