fix

jk.c

@@ -4026,7 +4026,7 @@ value_t *verb_reshape(interpreter_t *state, verb_t *self, value_t *x,
       return state->udf;
 
     value_t *b = x->val.array->data[1];
-    if (a->tag != NUMBER)
+    if (b->tag != NUMBER)
       return state->udf;
 
     size_t k = fabs(a->val.number);