| Issue |
137518
|
| Summary |
[clang] Regression: crash compiling dynamic_cast with final class and optimisation level higher than 0
|
| Labels |
clang
|
| Assignees |
|
| Reporter |
andyg1001
|
Since clang 19, the following minimal code will crash the compiler when compiled with an optimisation level -O1 or higher:
```
class base { virtual void fn() = 0; };
class test final : base { virtual void fn() { } };
test* new_test() { return new test(); }
test* cast(base* b) {
return dynamic_cast<test*>(b); // crash here!
}
```
On my PC, I get the error "fatal error: error in backend: Broken module found, compilation aborted!"
See demo here: https://godbolt.org/z/75odnc3Wo
Remove the 'final' on class test and the code will compile again.
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