Re: Clang & C++ exceptions in destructors
Re: Clang & C++ exceptions in destructors
- Subject: Re: Clang & C++ exceptions in destructors
- From: Jean-Daniel Dupas <email@hidden>
- Date: Tue, 08 Jan 2013 12:01:37 +0100
Le 8 janv. 2013 à 11:27, Jesper Papmehl-Dufay <email@hidden> a écrit :
> It seems clang (or the “Apple LLVM Compiler”) doesn’t like it when I throw exceptions from a C++ destructor. Is this intentional, or should I report it as a bug?
> (I aware that in general, throwing from a destructor is a very bad idea, I’m only doing it in very specific cases. For example, I know that my destructor is not called during stack unwinding due to another exception.)
>
> For example, the following program will terminate with a “terminate called without an active exception” message when the destructor throws std::exception (testing using Xcode 4.5.2 on Mac OS X 10.7.5):
>
>
> #include <stdexcept>
>
> class CThrowInDestructor {
> public: CThrowInDestructor() {}
> public: ~CThrowInDestructor() {
> throw std::exception();
> }
> };
>
> int main(int argc, const char * argv[]) {
> CThrowInDestructor* instance = new CThrowInDestructor;
> try {
> delete instance;
> instance = NULL;
> }
> catch (...) {
> }
> return 0;
> }
>
>
> If I switch compiler to LLVM GCC 4.2, the program exits normally, so it seems the problem is specific to clang.
What version of Xcode are you using ? With Xcode 4.5.2, it behaves as expected.
I added a print statement in the catch clause in your sample, and it is properly printed before the program exits normally.
-- Jean-Daniel
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