From 3f9ad7cefc652c7c01a22891250e81194c63064f Mon Sep 17 00:00:00 2001
From: Jarred Sumner <jarred@jarredsumner.com>
Date: Fri, 6 Sep 2024 16:58:08 -0700
Subject: [PATCH] Add a debug assertion

---
 src/string_mutable.zig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/string_mutable.zig b/src/string_mutable.zig
index 02ac07cbb3..c894eaf2e9 100644
--- a/src/string_mutable.zig
+++ b/src/string_mutable.zig
@@ -45,6 +45,7 @@ pub const MutableString = struct {
     }
 
     pub fn write(self: *MutableString, bytes: anytype) !usize {
+        bun.debugAssert(bytes.len == 0 or !bun.isSliceInBuffer(bytes, self.list.allocatedSlice()));
         try self.list.appendSlice(self.allocator, bytes);
         return bytes.len;
     }