[Lldb-commits] [lldb] [LLDB]Fix logic in matches method for thread comparison (PR #179873)

[Priyanshu Kumar via lldb-commits]

https://github.com/Priyanshu3820 created https://github.com/llvm/llvm-project/pull/179873

The method claims to check if a is a subset of b, but the implementation `a | b ==a` actually checks if b is a subset of a. This patch fixes that.

>From 2ed013156a86dc735e13fe72ba55eaa105a698ae Mon Sep 17 00:00:00 2001
From: Priyanshu Kumar <10b.priyanshu at gmail.com>
Date: Thu, 5 Feb 2026 12:28:46 +0530
Subject: [PATCH] Update TestDAP_stopped_events.py

---
 .../API/tools/lldb-dap/stopped-events/TestDAP_stopped_events.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lldb/test/API/tools/lldb-dap/stopped-events/TestDAP_stopped_events.py b/lldb/test/API/tools/lldb-dap/stopped-events/TestDAP_stopped_events.py
index 03dff39c82ed9..06d58fc6ff97d 100644
--- a/lldb/test/API/tools/lldb-dap/stopped-events/TestDAP_stopped_events.py
+++ b/lldb/test/API/tools/lldb-dap/stopped-events/TestDAP_stopped_events.py
@@ -16,7 +16,7 @@ class TestDAP_stopped_events(lldbdap_testcase.DAPTestCaseBase):
 
     def matches(self, a: dict, b: dict) -> bool:
         """Returns true if 'a' is a subset of 'b', otherwise false."""
-        return a | b == a
+        return b | a == b
 
     def verify_threads(self, expected_threads):
         threads_resp = self.dap_server.request_threads()