refs.c: optimize check_refname_component()

diff --git a/t/t5511-refspec.sh b/t/t5511-refspec.sh
index c28932216b1dd0893bc3c3a0a643963663ff8e1f..de6db86ccff044b5cc97a7b9236760076a8784d8 100755 (executable)
--- a/t/t5511-refspec.sh
+++ b/t/t5511-refspec.sh
@@ -5,7 +5,6 @@ test_description='refspec parsing'
 . ./test-lib.sh
 
 test_refspec () {
-
        kind=$1 refspec=$2 expect=$3
        git config remote.frotz.url "." &&
        git config --remove-section remote.frotz &&
@@ -84,4 +83,9 @@ test_refspec push 'refs/heads/*/*/for-linus:refs/remotes/mine/*' invalid
 test_refspec fetch 'refs/heads/*/for-linus:refs/remotes/mine/*'
 test_refspec push 'refs/heads/*/for-linus:refs/remotes/mine/*'
 
+good=$(printf '\303\204')
+test_refspec fetch "refs/heads/${good}"
+bad=$(printf '\011tab')
+test_refspec fetch "refs/heads/${bad}"                         invalid
+
 test_done