From 09a12170263aac916753e4d8e4e31eeddc3e35aa Mon Sep 17 00:00:00 2001
From: leileizhang <leilzh@microsoft.com>
Date: Wed, 3 Sep 2025 13:56:51 +0800
Subject: [PATCH] Fixed a memory alignment issue that caused the measure tool
 to crash on some machines. (#41556)
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<!-- Enter a brief description/summary of your PR here. What does it
fix/what does it change/how was it tested (even manually, if necessary)?
-->
## Summary of the Pull Request
The EXCEPTION_DATATYPE_MISALIGNMENT error is a classic memory alignment
issue, and add alignas(8) to Ensures cursorPosSystemSpace is aligned on
an 8-byte boundary

This happened on the pipeline’s ARM64 UI test machine.

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## PR Checklist

- [x] Closes: #41555
- [ ] **Communication:** I've discussed this with core contributors
already. If the work hasn't been agreed, this work might be rejected
- [ ] **Tests:** Added/updated and all pass
- [ ] **Localization:** All end-user-facing strings can be localized
- [ ] **Dev docs:** Added/updated
- [ ] **New binaries:** Added on the required places
- [ ] [JSON for
signing](https://github.com/microsoft/PowerToys/blob/main/.pipelines/ESRPSigning_core.json)
for new binaries
- [ ] [WXS for
installer](https://github.com/microsoft/PowerToys/blob/main/installer/PowerToysSetup/Product.wxs)
for new binaries and localization folder
- [ ] [YML for CI
pipeline](https://github.com/microsoft/PowerToys/blob/main/.pipelines/ci/templates/build-powertoys-steps.yml)
for new test projects
- [ ] [YML for signed
pipeline](https://github.com/microsoft/PowerToys/blob/main/.pipelines/release.yml)
- [ ] **Documentation updated:** If checked, please file a pull request
on [our docs
repo](https://github.com/MicrosoftDocs/windows-uwp/tree/docs/hub/powertoys)
and link it here: #xxx

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or any additional comments/features here -->
## Detailed Description of the Pull Request / Additional comments

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## Validation Steps Performed
---
 src/modules/MeasureTool/MeasureToolCore/ToolState.h | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/modules/MeasureTool/MeasureToolCore/ToolState.h b/src/modules/MeasureTool/MeasureToolCore/ToolState.h
index 57d5d04ca1..6d046a43fe 100644
--- a/src/modules/MeasureTool/MeasureToolCore/ToolState.h
+++ b/src/modules/MeasureTool/MeasureToolCore/ToolState.h
@@ -31,7 +31,11 @@ struct CommonState
 
     Measurement::Unit units = Measurement::Unit::Pixel;
 
-    POINT cursorPosSystemSpace = {}; // updated atomically
+    #pragma warning(push)
+    #pragma warning(disable : 4324)
+    alignas(8) POINT cursorPosSystemSpace = {}; // updated atomically
+    #pragma warning(pop)
+
     std::atomic_bool closeOnOtherMonitors = false;
 
     float GetPhysicalPx2MmRatio(HWND window) const