--- a/contrib/shpsort.c	2022-08-17 14:48:59.276669116 +0800
+++ b/contrib/shpsort.c	2022-08-17 14:49:22.836834517 +0800
@@ -279,7 +279,6 @@
 	free(result[--i]);
       }
       free(result);
-      free(copy);
       return NULL;
     }
     result = tmp;