get_sha1_basic(): corner case ambiguity fix

diff --git a/git-merge-octopus.sh b/git-merge-octopus.sh
index bb58e22a18bdaefae3f8005e7b0a0cfaba4b4185..7adffdc7950baaf1da5b36913f78404c48c6d270 100755 (executable)
--- a/git-merge-octopus.sh
+++ b/git-merge-octopus.sh
@@ -8,6 +8,11 @@
 LF='
 '
 
+die () {
+    echo >&2 "$*"
+    exit 1
+}
+
 # The first parameters up to -- are merge bases; the rest are heads.
 bases= head= remotes= sep_seen=
 for arg