From 1decc763840d47632e41bed7a628e5de7fcaef4d Mon Sep 17 00:00:00 2001
From: Zefir Kirilov <contact@zefir.pro>
Date: Tue, 23 Sep 2025 15:56:06 +0300
Subject: [PATCH] Check that flag match query is not null

---
 src/cmd/flag.d | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/cmd/flag.d b/src/cmd/flag.d
index a5d277d..52c8de8 100644
--- a/src/cmd/flag.d
+++ b/src/cmd/flag.d
@@ -100,6 +100,8 @@ public class Flag {
      *   query = String to check.
      */
     public bool matches(string query) const nothrow @safe {
+        if (query == null)
+            return false;
         return
             (query.startsWith("--") && longName == query[2..$])
             || (query.startsWith("-") && shortName == query[1..2])