From 9c30fe62031cb8e2fcb814a23e47894d8d1bd7d1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Felix=20B=C3=B6hm?= <188768+fb55@users.noreply.github.com>
Date: Fri, 27 Aug 2021 13:34:35 +0100
Subject: [PATCH] refactor(tokenizer): Use explicit empty buffer if we have
 reached the end

Ensures we don't keep any slices in memory (independent of the JS engine)
---
 src/Tokenizer.ts | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/Tokenizer.ts b/src/Tokenizer.ts
index b88278b64..0ed920767 100644
--- a/src/Tokenizer.ts
+++ b/src/Tokenizer.ts
@@ -833,7 +833,8 @@ export default class Tokenizer {
         }
 
         const start = this.sectionStart < 0 ? this._index : this.sectionStart;
-        this.buffer = this.buffer.substr(start);
+        this.buffer =
+            start === this.buffer.length ? "" : this.buffer.substr(start);
         this._index -= start;
         this.bufferOffset += start;