http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47376
Summary: Duplicate member through anonymous unions not reported
Product: gcc
Version: 4.5.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
AssignedTo: [email protected]
ReportedBy: [email protected]
Host: x86_64-suse-linux
Target: x86_64-suse-linux
Build: x86_64-suse-linux
Given the following example:
---
struct foo {
int a;
union {
int a;
double b;
};
};
int main(void)
{
struct foo f;
f.a = 123;
return 0;
}
---
How it came to be:
Accidental error where I had forgotten to remove foo.a after having added
foo.{anonymous}.a.
What has been observed:
It compiles fine, which caused this programming error of mine to go unnoticed
for half a day. It seems gcc gives foo.a precedence over foo.{anonymous}.a when
accessing it through f.a=....
What had been expected:
I would have liked that gcc emit at least a warning because f.a is ambiguous.
