fix merge error

source/mach.c

@@ -3008,10 +3008,10 @@ static MachCode *mcode_lower_func(cJSON *fobj, const char *filename) {
   if (s.nr_slots > 255) {
     cJSON *nm_chk = cJSON_GetObjectItemCaseSensitive(fobj, "name");
     const char *fn_name = nm_chk ? cJSON_GetStringValue(nm_chk) : "<anonymous>";
-    fprintf(stderr, "ERROR: function '%s' has %d slots (max 255). "
+    fprintf(stderr, "FATAL: function '%s' has %d slots (max 255). "
             "Ensure the streamline optimizer ran before mach compilation.\n",
             fn_name, s.nr_slots);
-    return NULL;
+    abort();
   }
   int dis_raw = (int)cJSON_GetNumberValue(
       cJSON_GetObjectItemCaseSensitive(fobj, "disruption_pc"));

source/runtime.c

@@ -1370,7 +1370,7 @@ JSValue gc_copy_value (JSContext *ctx, JSValue v, uint8_t *from_base, uint8_t *f
 
     /* Frame shortening: returned frames (caller == JS_NULL) only need
        [this][args][closure_locals] — shrink during copy. */
-    if (0 && type == OBJ_FRAME) {
+    if (type == OBJ_FRAME) {
       JSFrame *f = (JSFrame *)hdr_ptr;
       if (JS_IsNull (f->caller) && JS_IsPtr (f->function)) {
         /* fn may be forwarded, but kind (offset 18) and u.cell.code (offset 24)