update-cache.c:  22f3ccd47db4f0888901109a8cbf883d272d1cba
--- 22f3ccd47db4f0888901109a8cbf883d272d1cba/update-cache.c
+++ uncommitted/update-cache.c
@@ -202,6 +202,7 @@
 			printf("%s: needs update\n", ce->name);
 			continue;
 		}
+		free(active_cache[i]);
 		active_cache[i] = new;
 	}
 }