read-tree A B C: do not create a bogus index and do not segfault

diff --git a/t/t6120-describe.sh b/t/t6120-describe.sh
index 56bbd8519d69a1fc31293f30eb3c8a7b20a285cc..2fb672c3b43a9efe4cb9c85465f6b33f23724e48 100755 (executable)
--- a/t/t6120-describe.sh
+++ b/t/t6120-describe.sh
@@ -108,7 +108,7 @@ warning: tag 'A' is really 'Q' here
 EOF
 check_describe A-* HEAD
 test_expect_success 'warning was displayed for Q' '
-       git diff err.expect err.actual
+       test_cmp err.expect err.actual
 '
 test_expect_success 'rename tag Q back to A' '
        mv .git/refs/tags/Q .git/refs/tags/A
@@ -117,4 +117,28 @@ test_expect_success 'rename tag Q back to A' '
 test_expect_success 'pack tag refs' 'git pack-refs'
 check_describe A-* HEAD
 
+test_expect_success 'set-up matching pattern tests' '
+       git tag -a -m test-annotated test-annotated &&
+       echo >>file &&
+       test_tick &&
+       git commit -a -m "one more" &&
+       git tag test1-lightweight &&
+       echo >>file &&
+       test_tick &&
+       git commit -a -m "yet another" &&
+       git tag test2-lightweight &&
+       echo >>file &&
+       test_tick &&
+       git commit -a -m "even more"
+
+'
+
+check_describe "test-annotated-*" --match="test-*"
+
+check_describe "test1-lightweight-*" --tags --match="test1-*"
+
+check_describe "test2-lightweight-*" --tags --match="test2-*"
+
+check_describe "test2-lightweight-*" --long --tags --match="test2-*" HEAD^
+
 test_done