commit d3f84d51c4443f621486b49558aa86b4e5c45a04
from: Stefan Sperling <stsp@stsp.name>
date: Thu Jul 11 19:12:49 2019 UTC

catch and prevent 'got branch -'; I've done this often enough now...

commit - ba882ee388d95f88eb3e54d3ccd2b07e736e5190
commit + d3f84d51c4443f621486b49558aa86b4e5c45a04
blob - 60dad83c94dc3446dd85735658c86d79a896a26c
blob + b141b0331a9ba966ddf63bb4ed602a7e9504f412
--- got/got.c
+++ got/got.c
@@ -2284,6 +2284,14 @@ add_branch(struct got_repository *repo, const char *br
 	struct got_reference *ref = NULL;
 	char *base_refname = NULL, *refname = NULL;
 	struct got_reference *base_ref;
+
+	/*
+	 * Don't let the user create a branch named '-'.
+	 * While technically a valid reference name, this case is usually
+	 * an unintended typo.
+	 */
+	if (branch_name[0] == '-' && branch_name[1] == '\0')
+		return got_error(GOT_ERR_BAD_REF_NAME);
 
 	if (strcmp(GOT_REF_HEAD, base_branch) == 0) {
 		base_refname = strdup(GOT_REF_HEAD);