https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126656
Bug ID: 126656
Summary: False Positive -Wdangling-reference
Product: gcc
Version: 17.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: krebbel at gcc dot gnu.org
Target Milestone: ---
struct Address {
virtual ~Address() = default;
};
int pool[1];
int& Get(Address) { return pool[0]; }
void test() {
const int& ref = Get({});
}
$ g++ -Wdangling-reference minimal.cpp -c
minimal.cpp: In function ‘void test()’:
minimal.cpp:9:16: warning: possibly dangling reference to a temporary
[-Wdangling-reference]
9 | const int& ref = Get({});
| ^~~
minimal.cpp:9:25: note: ‘Address’ temporary created here
9 | const int& ref = Get({});
| ~~~^~~~
Warning disappears with:
- Removing "virtual" from the destructor
- Turning the array into a plain int
- Removing the const qualifier in test
- (Obviously) When adding [[gnu::no_dangling]] to Get or struct Address
PR109642
