| Issue |
132208
|
| Summary |
[Clang] Destructor definition is not compiled for local class in generic lambda initializing a variable template
|
| Labels |
clang
|
| Assignees |
|
| Reporter |
MagentaTreehouse
|
```c++
template <class>
constexpr auto f{[] (auto) {
struct OnScopeExit { ~OnScopeExit() {} }
pending;
}};
int main() {
f<int>(0);
}
```
See https://compiler-explorer.com/z/6vneqf93z.
Warning and linker error since Clang 15:
```console
<source>:3:26: warning: inline function '(anonymous class)::operator()(int)::OnScopeExit::~OnScopeExit' is not defined [-Wundefined-inline]
3 | struct OnScopeExit { ~OnScopeExit() {} }
| ^
<source>:4:5: note: used here
4 | pending;
| ^
1 warning generated.
ASM generation compiler returned: 0
<source>:3:26: warning: inline function '(anonymous class)::operator()(int)::OnScopeExit::~OnScopeExit' is not defined [-Wundefined-inline]
3 | struct OnScopeExit { ~OnScopeExit() {} }
| ^
<source>:4:5: note: used here
4 | pending;
| ^
1 warning generated.
/opt/compiler-explorer/gcc-snapshot/lib/gcc/x86_64-linux-gnu/15.0.1/../../../../x86_64-linux-gnu/bin/ld: /tmp/example-eeceaa.o: in function `auto f<int>::{lambda(auto:1)#1}::operator()<int>(int) const':
<source>:5:(.text._ZNK1fIiEMUlT_E_clIiEEDaS1_[_ZNK1fIiEMUlT_E_clIiEEDaS1_]+0x14): undefined reference to `f<int>::{lambda(auto:1)#1}::operator()<int>(int) const::OnScopeExit::~OnScopeExit()'
clang++: error: linker command failed with exit code 1 (use -v to see invocation)
```
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