Merge branch 'jk/format-patch-leakfix' into next

A memory leak in the '--base' handling of 'git format-patch' has been
plugged, and the leak-reporting of the test suite when running under a
TAP harness has been improved.

* jk/format-patch-leakfix:
  format-patch: fix leak of rev_info in prepare_bases()
  t: move LSan errors from stdout to stderr

builtin/log.c

@@ -1888,6 +1888,7 @@ static void prepare_bases(struct base_tree_info *bases,
 		bases->nr_patch_id++;
 	}
 	clear_commit_base(&commit_base);
+	release_revisions(&revs);
 }
 
 static void print_bases(struct base_tree_info *bases, FILE *file)

t/test-lib.sh

@@ -1217,14 +1217,14 @@ check_test_results_san_file_ () {
 	then
 		return
 	fi &&
-	say_color error "$(cat "$TEST_RESULTS_SAN_FILE".*)" &&
+	say_color >&4 error "$(cat "$TEST_RESULTS_SAN_FILE".*)" &&
 
 	if test "$test_failure" = 0
 	then
-		say "Our logs revealed a memory leak, exit non-zero!" &&
+		say >&4 "Our logs revealed a memory leak, exit non-zero!" &&
 		invert_exit_code=t
 	else
-		say "Our logs revealed a memory leak..."
+		say >&4 "Our logs revealed a memory leak..."
 	fi
 }