unpack-trees.c: look ahead in the index

diff --git a/t/t6300-for-each-ref.sh b/t/t6300-for-each-ref.sh
index daf02d5c103a55575edeefc53643a5b3794de121..8052c86ad3516505765ab214f4801940c8cc1684 100755 (executable)
--- a/t/t6300-for-each-ref.sh
+++ b/t/t6300-for-each-ref.sh
@@ -301,10 +301,11 @@ test_expect_success 'Check for invalid refname format' '
 
 cat >expected <<\EOF
 heads/master
-master
+tags/master
 EOF
 
-test_expect_success 'Check ambiguous head and tag refs' '
+test_expect_success 'Check ambiguous head and tag refs (strict)' '
+       git config --bool core.warnambiguousrefs true &&
        git checkout -b newtag &&
        echo "Using $datestamp" > one &&
        git add one &&
@@ -315,12 +316,23 @@ test_expect_success 'Check ambiguous head and tag refs' '
        test_cmp expected actual
 '
 
+cat >expected <<\EOF
+heads/master
+master
+EOF
+
+test_expect_success 'Check ambiguous head and tag refs (loose)' '
+       git config --bool core.warnambiguousrefs false &&
+       git for-each-ref --format "%(refname:short)" refs/heads/master refs/tags/master >actual &&
+       test_cmp expected actual
+'
+
 cat >expected <<\EOF
 heads/ambiguous
 ambiguous
 EOF
 
-test_expect_success 'Check ambiguous head and tag refs II' '
+test_expect_success 'Check ambiguous head and tag refs II (loose)' '
        git checkout master &&
        git tag ambiguous testtag^0 &&
        git branch ambiguous testtag^0 &&