https://github.com/charles-zablit created 
https://github.com/llvm/llvm-project/pull/200885

Other implementations return `false` if something went wrong. The default 
branch just logs an error and continues. This patch converts it to return 
`false` instead.

>From 38462f6a3743119699930e85d0bbdcf868116448 Mon Sep 17 00:00:00 2001
From: Charles Zablit <[email protected]>
Date: Mon, 1 Jun 2026 18:45:34 +0100
Subject: [PATCH] [lldb][windows] return false in default branch of
 RegisterContextWindows_x86::WriteRegister

---
 .../Process/Windows/Common/x86/RegisterContextWindows_x86.cpp    | 1 +
 1 file changed, 1 insertion(+)

diff --git 
a/lldb/source/Plugins/Process/Windows/Common/x86/RegisterContextWindows_x86.cpp 
b/lldb/source/Plugins/Process/Windows/Common/x86/RegisterContextWindows_x86.cpp
index 02e7e8529ca68..76da20f5a942c 100644
--- 
a/lldb/source/Plugins/Process/Windows/Common/x86/RegisterContextWindows_x86.cpp
+++ 
b/lldb/source/Plugins/Process/Windows/Common/x86/RegisterContextWindows_x86.cpp
@@ -258,6 +258,7 @@ bool RegisterContextWindows_x86::WriteRegister(const 
RegisterInfo *reg_info,
   default:
     LLDB_LOG(log, "Write value {0:x} to unknown register {1}",
              reg_value.GetAsUInt32(), reg);
+    return false;
   }
 
   // Physically update the registers in the target process.

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