From 76967dad2e67da07640da7f5d40da1b5d1f16248 Mon Sep 17 00:00:00 2001
From: Adnan Maolood <me@adnano.co>
Date: Fri, 19 Feb 2021 18:06:54 -0500
Subject: [PATCH] mux: Reject empty patterns

---
 mux.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/mux.go b/mux.go
index 6818fea..3eec7f5 100644
--- a/mux.go
+++ b/mux.go
@@ -219,6 +219,9 @@ func (mux *ServeMux) ServeGemini(w ResponseWriter, r *Request) {
 // Handle registers the handler for the given pattern.
 // If a handler already exists for pattern, Handle panics.
 func (mux *ServeMux) Handle(pattern string, handler Handler) {
+	if pattern == "" {
+		panic("gemini: invalid pattern")
+	}
 	if handler == nil {
 		panic("gemini: nil handler")
 	}