https://llvm.org/bugs/show_bug.cgi?id=25997
David Majnemer <david.majne...@gmail.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
CC| |david.majne...@gmail.com,
| |r...@google.com
Resolution|--- |WONTFIX
--- Comment #1 from David Majnemer <david.majne...@gmail.com> ---
Thanks for the excellent bug report!
This seems to be a quirk in the behavior of MSVC's personality routine.
C++17 [except.handle]p9 says:
If no matching handler is found, the function std::terminate() is called;
whether or not the stack is unwound before this call to std::terminate() is
implementation-defined.
Clang has decided that your catch handler is not a matching handler because it
is dynamically unreachable.
Here is an example which doesn't rely on clang-cl. clang, gcc and icc give the
following code different behavior depending on the optimization level:
extern "C" void __attribute__((nothrow, noreturn)) exit(int);
struct S {
~S() { exit(1); }
};
void f() {
S s;
throw 0;
}
void g() {
try {
f();
} catch (...) {
}
}
int main() { g(); }
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