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From: "dougmencken at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug objc++/61759] [ICE] [objc] reaching gcc_unreachable in objc_eh_runtime_type at objc/objc-next-runtime-abi-01.c
Date: Fri, 02 Oct 2015 01:06:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61759

--- Comment #6 from Douglas Mencken <dougmencken at gmail dot com> ---
Looks like I found the root of the issue ~
GCC ICEs when it meets C++ exception handling (try+catch)

$ cat main.mm
#include <Foundation/Foundation.h>
#include <iostream>

int main (void)
{
        try {
                throw 0;
        } catch (int & e) {
                std::cout << "caught" << std::endl;
        }

        NSString *name = @"GNUstep !";
        NSAutoreleasePool *pool;
        pool = [NSAutoreleasePool new];
        [pool drain];
}

$ g++ main.mm -o test.out -framework Foundation -lobjc
main.mm: In function 'int main()':
main.mm:4:5: internal compiler error: in objc_eh_runtime_type, at
objc/objc-next-runtime-abi-01.c:2804
 int main (void)
     ^
libbacktrace could not find executable to open
Please submit a full bug report,