Processing unhandled exception by exiting engine with ERR_UNHANDLED_EXCEPTION; determining if function's code is strict by checking for appearance of 'meta' opcode of OPCODE_META_TYPE_STRICT_CODE type at the beginning of the function's code.

src/globals.h

@@ -56,6 +56,7 @@ typedef enum
   ERR_PARSER = -9,
   ERR_MEMORY = -10,
   ERR_SYSCALL = -11,
+  ERR_UNHANDLED_EXCEPTION = -12,
   ERR_GENERAL = -255
 } jerry_status_t;