https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92309
Bug ID: 92309
Summary: Assignment to anonymous union member corrupts sibling
members in struct
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: d
Assignee: ibuclaw at gdcproject dot org
Reporter: sahmi.soulaimane at gmail dot com
Target Milestone: ---
Test case
```
union U
{
struct
{
size_t a;
size_t b;
union
{
size_t c;
size_t d;
}
}
}
void main()
{
U u;
assert(u.a == 0); // ok
u.d = 1;
assert(u.a == 0); // error
}
```
