From c90cf67dc6e4df584a55f51fe9fc39a41b2a6ab6 Mon Sep 17 00:00:00 2001
From: Ali Mohammad Pur <ali.mpfard@gmail.com>
Date: Wed, 10 Aug 2022 22:07:00 +0430
Subject: [PATCH] Shell: Avoid StringView OOB access in Formatter ctor

---
 Userland/Shell/Formatter.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Userland/Shell/Formatter.h b/Userland/Shell/Formatter.h
index c6c4e3fb1a..1a08790cf2 100644
--- a/Userland/Shell/Formatter.h
+++ b/Userland/Shell/Formatter.h
@@ -24,6 +24,9 @@ public:
         , m_source(source)
         , m_cursor(cursor)
     {
+        if (m_source.is_empty())
+            return;
+
         size_t offset = 0;
         for (auto ptr = m_source.end() - 1; ptr >= m_source.begin() && isspace(*ptr); --ptr)
             ++offset;