1 files changed, 5 insertions, 0 deletions
diff --git a/src/revparse.c b/src/revparse.c
index 62c193bf2..dd8476e35 100644
--- a/src/revparse.c
+++ b/src/revparse.c
@@ -582,6 +582,11 @@ static int revparse_global_grep(git_object **out, git_repository *repo, const ch
    git_revwalk *walk;
    int retcode = GIT_ERROR;
 
+   if (!pattern[0]) {
+      giterr_set(GITERR_REGEX, "Empty pattern");
+      return GIT_ERROR;
+   }
+
    if (!git_revwalk_new(&walk, repo)) {
       regex_t preg;
       int reg_error;