X-Git-Url: https://git.octo.it/?a=blobdiff_plain;f=git-checkout.sh;h=2c053a33c3c78f27150cdd397ad28641787abb3a;hb=750a09a7de63c92868cff41a3151eac320c77fa0;hp=c3825904b60d36edca96506d7f451cf0349b262d;hpb=8098a178b26dc7a158d129a092a5b78da6d12b72;p=git.git

diff --git a/git-checkout.sh b/git-checkout.sh
index c3825904..2c053a33 100755
--- a/git-checkout.sh
+++ b/git-checkout.sh
@@ -17,6 +17,8 @@ while [ "$#" != "0" ]; do
 			die "git checkout: -b needs a branch name"
 		[ -e "$GIT_DIR/refs/heads/$newbranch" ] &&
 			die "git checkout: branch $newbranch already exists"
+		git-check-ref-format "heads/$newbranch" ||
+			die "we do not like '$newbranch' as a branch name."
 		;;
 	"-f")
 		force=1