parse-options: add OPT_NONEG to the "contains" option

diff --git a/t/t3201-branch-contains.sh b/t/t3201-branch-contains.sh
index 7f3ec47241cd6af7a1c107cba114decaa87df108..daa3ae82b71228edd7c6b484cfa5599ebd4803b0 100755 (executable)
--- a/t/t3201-branch-contains.sh
+++ b/t/t3201-branch-contains.sh
@@ -130,6 +130,15 @@ test_expect_success 'implicit --list conflicts with modification options' '
 
 '
 
+test_expect_success 'Assert that --contains only works on commits, not trees & blobs' '
+       test_must_fail git branch --contains master^{tree} &&
+       blob=$(git hash-object -w --stdin <<-\EOF
+       Some blob
+       EOF
+       ) &&
+       test_must_fail git branch --contains $blob
+'
+
 # We want to set up a case where the walk for the tracking info
 # of one branch crosses the tip of another branch (and make sure
 # that the latter walk does not mess up our flag to see if it was