Merge branch 'maint'

* maint:
  fast-import: close pack before unlinking it
  pager: do not dup2 stderr if it is already redirected
  git-show: do not segfault when showing a bad tag

builtin-log.c

@@ -340,7 +340,13 @@ int cmd_show(int argc, const char **argv, const char *prefix)
 					t->tag,
 					diff_get_color_opt(&rev.diffopt, DIFF_RESET));
 			ret = show_object(o->sha1, 1, &rev);
-			objects[i].item = parse_object(t->tagged->sha1);
+			if (ret)
+				break;
+			o = parse_object(t->tagged->sha1);
+			if (!o)
+				ret = error("Could not read object %s",
+					    sha1_to_hex(t->tagged->sha1));
+			objects[i].item = o;
 			i--;
 			break;
 		}