Open Radar

 
Summary:

ObjC++ code fails to catch exceptions by baseclass when run from a "Foundation" tool/app. Same code works when run from a pure "C++" tool/app.

Steps to Reproduce:

1. Embed this code snippet into a "Foundation" command-line tool project:

	#include <iostream>
	#include <stdexcept>
	
	//. . .
	
	try {
		throw std::invalid_argument("Ecky ecky ecky ecky pakang zoom boing!");
	}
	catch(const std::exception &e) {
		std::cout << "Exception raised: " << e.what() << std::endl;
	}
	catch( ... ){
	    std::cout << "Unknown exception raised!" << std::endl;
	}
	
	try {
		throw std::invalid_argument("Ecky ecky ecky ecky pakang zoom boing!");
	}
	catch(const std::invalid_argument &e) {
		std::cout << "Exception raised: " << e.what() << std::endl;
	}
	catch( ... ){
	    std::cout << "Unknown exception raised!" << std::endl;
	}
	
2. Run it.

Expected Results:

	// Correct output:
	// Exception raised: Ecky ecky ecky ecky pakang zoom boing!
	// Exception raised: Ecky ecky ecky ecky pakang zoom boing!

Actual Results:

	// Wrong output:
	// Unknown exception raised!
	// Exception raised: Ecky ecky ecky ecky pakang zoom boing!

Doing the same within a "C++"  command-line tool project results in correct output. Same code. No changes.

Notes:
Found this stack overflow question dealing with the same issue:
http://stackoverflow.com/questions/10602726/xcode-llvm-catch-clause-not-matching-derived-types