Merge branch 'nd/unpack-trees-with-cache-tree'

Trivial bugfix.

* nd/unpack-trees-with-cache-tree:
  read-cache: use of memory after it is freed

read-cache.c

@@ -2297,8 +2297,8 @@ int read_index_from(struct index_state *istate, const char *path,
 	freshen_shared_index(base_path, 0);
 	merge_base_index(istate);
 	post_read_index_from(istate);
-	free(base_path);
 	trace_performance_leave("read cache %s", base_path);
+	free(base_path);
 	return ret;
 }