GCC 4.7 libobjc2 bug

gcc-4.7-gnustep-libobjc2-bug.m

/* compile with
 * gcc -std=gnu99 -pthread -fobjc-exceptions -O0 bug.m -o bug \
 * ../third_party/libobjc/libobjc.a
 * Target: x86_64-linux-gnu
 * gcc version 4.7.2 (Debian 4.7.2-5)
 */

#include <stdlib.h>
#include <stdio.h>

#include <objc/runtime.h>

@interface tnt_Object {
	Class isa;
}
+ (id) alloc;
- (id) init;
- (void) free;
@end

@implementation tnt_Object
+ (id) alloc
{
	return class_createInstance(self, 0);
}
- (id) init
{
	return self;
}
- (void) free
{
	object_dispose(self);
}
@end

static int
dothrow(void)
{
	@try {
		/* the next line is important for the test */
		char buf[] = { 0x0, 0x0, 0x0, 0x0, 0x0};
		(void) buf;
		@throw [[tnt_Object alloc] init];
	} @catch (tnt_Object *e) {
		fprintf(stderr, "catch 1\n");
		return -1;
	} @catch (id e) {
		return -1;
	}

	return 0;
}

int
main(void)
{
	@try {
		dothrow();
	} @catch (tnt_Object *e) {
		fprintf(stderr, "catch 2\n");
	}

	fprintf(stderr, "exit\n");

	return 0;
}