Fix a race condition around Open/CloseClipboard#19297
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carlos-zamora
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Aug 29, 2025
DHowett
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tl;dr: Open/CloseClipboard are surprisingly not thread-safe. ## Validation Steps Performed * Copy a large amount of text (>1MB) * Run `edit.exe` * Press and hold Ctrl+Shift+V * Doesn't crash ✅ (cherry picked from commit 5899343) Service-Card-Id: PVTI_lADOAF3p4s4BBcTlzgeLIjw Service-Version: 1.24
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tl;dr: Open/CloseClipboard are surprisingly not thread-safe.
Validation Steps Performed
edit.exe