From 257d9f6d02b5855354a2d81b7b6e65515d4f93a5 Mon Sep 17 00:00:00 2001
From: Red <red@relb.org>
Date: Fri, 22 Aug 2025 00:32:05 +0200
Subject: [PATCH] Fix exception when NtTerminateThread is called on the active
 thread.

---
 src/windows-emulator/windows_emulator.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/windows-emulator/windows_emulator.cpp b/src/windows-emulator/windows_emulator.cpp
index 091e7ddd..7352e915 100644
--- a/src/windows-emulator/windows_emulator.cpp
+++ b/src/windows-emulator/windows_emulator.cpp
@@ -52,6 +52,7 @@ namespace
     void perform_context_switch_work(windows_emulator& win_emu)
     {
         auto& threads = win_emu.process.threads;
+        auto*& active = win_emu.process.active_thread;
 
         for (auto it = threads.begin(); it != threads.end();)
         {
@@ -61,6 +62,11 @@ namespace
                 continue;
             }
 
+            if (active == &it->second)
+            {
+                active = nullptr;
+            }
+
             const auto [new_it, deleted] = threads.erase(it);
             if (!deleted)
             {