@@ -129,10 +129,13 @@
 	@try {
 		void *pool = objc_autoreleasePoolPush();
 		const char *path;
 		char **argv;
 
+		_pid = -1;
+		_readPipe[0] = _writePipe[1] = -1;
+
 		if (pipe(_readPipe) != 0 || pipe(_writePipe) != 0)
 			@throw [OFInitializationFailedException
 			    exceptionWithClass: self.class];
 
 		path = [program cStringWithEncoding: [OFLocale encoding]];