Merge branch 'tg/stash-refresh-index'

Recent update to "git stash pop" made the command empty the index
when run with the "--quiet" option, which has been corrected.

* tg/stash-refresh-index:
  stash: make sure we have a valid index before writing it
diff --git a/builtin/stash.c b/builtin/stash.c
index d913487..4ad3adf 100644
--- a/builtin/stash.c
+++ b/builtin/stash.c
@@ -483,13 +483,12 @@
 		if (ret)
 			return -1;
 
+		/* read back the result of update_index() back from the disk */
 		discard_cache();
+		read_cache();
 	}
 
-	if (quiet) {
-		if (refresh_and_write_cache(REFRESH_QUIET, 0, 0))
-			warning("could not refresh index");
-	} else {
+	if (!quiet) {
 		struct child_process cp = CHILD_PROCESS_INIT;
 
 		/*
diff --git a/t/t3903-stash.sh b/t/t3903-stash.sh
index a4da72f..ea56e85 100755
--- a/t/t3903-stash.sh
+++ b/t/t3903-stash.sh
@@ -244,8 +244,11 @@
 	test_must_be_empty output.out
 '
 
-test_expect_success 'pop -q is quiet' '
+test_expect_success 'pop -q works and is quiet' '
 	git stash pop -q >output.out 2>&1 &&
+	echo bar >expect &&
+	git show :file >actual &&
+	test_cmp expect actual &&
 	test_must_be_empty output.out
 '
 
@@ -254,6 +257,8 @@
 	git add file &&
 	git stash save --quiet &&
 	git stash pop -q --index >output.out 2>&1 &&
+	git diff-files file2 >file2.diff &&
+	test_must_be_empty file2.diff &&
 	test foo = "$(git show :file)" &&
 	test_must_be_empty output.out
 '