From 1b24491fcbdbbd3ecb42df9c3c3dc142f0dcf739 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Tue, 29 Sep 2026 12:18:06 +0000
Subject: [PATCH 1/2] Initial plan


From 761a080931dc93bfeabe9228479e4a35eb28b283 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Tue, 29 Sep 2026 12:27:35 +0000
Subject: [PATCH 2/2] Run Windows ARM checks serially

Co-authored-by: nobu <16700+nobu@users.noreply.github.com>
---
 .github/workflows/windows.yml | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/.github/workflows/windows.yml b/.github/workflows/windows.yml
index d80a81db4bc84e..6418d0ddb8f422 100644
--- a/.github/workflows/windows.yml
+++ b/.github/workflows/windows.yml
@@ -207,7 +207,16 @@ jobs:
           reg add "HKLM\SOFTWARE\Microsoft\Windows\Windows Error Reporting\LocalDumps" /v DumpFolder /t REG_EXPAND_SZ /d "%GITHUB_WORKSPACE%\crashdumps" /f
           reg add "HKLM\SOFTWARE\Microsoft\Windows\Windows Error Reporting\LocalDumps" /v DumpType /t REG_DWORD /d 1 /f
 
+      # The Windows ARM runner intermittently crashes parallel test workers.
+      - name: Run checks (serial on Windows ARM)
+        run: nmake ${{ matrix.test_task || 'check' }}
+        if: ${{ matrix.os == '11-arm' }}
+        env:
+          RUBY_DEBUG: wer
+        timeout-minutes: 70
+
       - run: nmake ${{ matrix.test_task || 'check' }}
+        if: ${{ matrix.os != '11-arm' }}
         env:
           RUBY_TESTOPTS: -j${{ env.TEST_JOBS || 4 }}
           RUBY_DEBUG: wer