Clang 7 documentation has a section on MSVC compatibility, https://clang.llvm.org/docs/MSVCCompatibility.html https://clang.llvm.org/docs/MSVCCompatibility.html

Clang 7 documentation has a section on MSVC compatibility, https://clang.llvm.org/docs/MSVCCompatibility.html https://clang.llvm.org/docs/MSVCCompatibility.html From that document: Asynchronous Exceptions (SEH): Partial. Structured exceptions (__try / __except / __finally) mostly work on x86 and x64. LLVM does not model asynchronous exceptions, so it is currently impossible to catch an asynchronous exception generated in the same frame as the catching __try.