From 01b48e938198a206b95ed06f3a7e530e859c1cbc Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Carl=20=C3=85stholm?= <carl@astholm.se>
Date: Sun, 7 Jan 2024 21:39:22 +0100
Subject: [PATCH] InternPool: Fix rare buffer overflow when initializing
 aggregate with sentinel

---
 src/InternPool.zig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/InternPool.zig b/src/InternPool.zig
index 2e690652a3..0844e0f7a5 100644
--- a/src/InternPool.zig
+++ b/src/InternPool.zig
@@ -5315,7 +5315,7 @@ pub fn get(ip: *InternPool, gpa: Allocator, key: Key) Allocator.Error!Index {
 
             try ip.extra.ensureUnusedCapacity(
                 gpa,
-                @typeInfo(Tag.Aggregate).Struct.fields.len + @as(usize, @intCast(len_including_sentinel)),
+                @typeInfo(Tag.Aggregate).Struct.fields.len + @as(usize, @intCast(len_including_sentinel + 1)),
             );
             ip.items.appendAssumeCapacity(.{
                 .tag = .aggregate,