From 852e93aa74e153ee516819a9fa226d28f6ab7fca Mon Sep 17 00:00:00 2001
From: Tony Wasserka <neobrain@users.noreply.github.com>
Date: Mon, 1 Jun 2026 16:23:40 +0200
Subject: [PATCH] Core: Fix dereference of invalid iterator

---
 FEXCore/Source/Interface/Core/Core.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/FEXCore/Source/Interface/Core/Core.cpp b/FEXCore/Source/Interface/Core/Core.cpp
index 1833efe95..b9aa7407f 100644
--- a/FEXCore/Source/Interface/Core/Core.cpp
+++ b/FEXCore/Source/Interface/Core/Core.cpp
@@ -575,7 +575,7 @@ ContextImpl::GenerateIR(FEXCore::Core::InternalThreadState* Thread, uint64_t Gue
       bool BlockInForceTSOValidRange = false;
       auto InstForceTSOIt = ForceTSOInstructions.end();
       if (ForceTSOValidRanges.Contains({Block.Entry, Block.Entry + Block.Size})) {
-        if (auto It = ForceTSOInstructions.lower_bound(Block.Entry); *It < Block.Entry + Block.Size) {
+        if (auto It = ForceTSOInstructions.lower_bound(Block.Entry); It != ForceTSOInstructions.end() && *It < Block.Entry + Block.Size) {
           InstForceTSOIt = It;
           BlockInForceTSOValidRange = true;
         }