Merge branch 'ps/rebase-i-auto-unstash-upon-abort'

"git rebase -i --autostash" did not restore the auto-stashed change
when the operation was aborted.

* ps/rebase-i-auto-unstash-upon-abort:
  rebase -i: restore autostash on abort

git-rebase--interactive.sh

@@ -212,6 +212,7 @@ Once you are satisfied with your changes, run
 }
 
 die_abort () {
+	apply_autostash
 	rm -rf "$state_dir"
 	die "$1"
 }

t/t3420-rebase-autostash.sh

@@ -192,4 +192,35 @@ test_expect_success 'abort rebase -i with --autostash' '
 	test_cmp expected file0
 '
 
+test_expect_success 'restore autostash on editor failure' '
+	test_when_finished "git reset --hard" &&
+	echo uncommitted-content >file0 &&
+	(
+		test_set_editor "false" &&
+		test_must_fail git rebase -i --autostash HEAD^
+	) &&
+	echo uncommitted-content >expected &&
+	test_cmp expected file0
+'
+
+test_expect_success 'autostash is saved on editor failure with conflict' '
+	test_when_finished "git reset --hard" &&
+	echo uncommitted-content >file0 &&
+	(
+		write_script abort-editor.sh <<-\EOF &&
+			echo conflicting-content >file0
+			exit 1
+		EOF
+		test_set_editor "$(pwd)/abort-editor.sh" &&
+		test_must_fail git rebase -i --autostash HEAD^ &&
+		rm -f abort-editor.sh
+	) &&
+	echo conflicting-content >expected &&
+	test_cmp expected file0 &&
+	git checkout file0 &&
+	git stash pop &&
+	echo uncommitted-content >expected &&
+	test_cmp expected file0
+'
+
 test_done