[Webkit-unassigned] [Bug 258440] [Win] ASSERTION FAILED: ::DuplicateHandle failed with error 5

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=258440

--- Comment #6 from Fujii Hironori <Hironori.Fujii at sony.com> ---
Adding Sleep after OpenProcess in ArgumentCoder<Win32Handle>::decode makes this crash highly reproducible.
The web process is exiting after OpenProcess in another process.

diff --git a/Source/WebKit/Platform/IPC/win/ArgumentCodersWin.cpp b/Source/WebKit/Platform/IPC/win/ArgumentCodersWin.cpp
index 680fc1b577ac..2dff96d6ba12 100644
--- a/Source/WebKit/Platform/IPC/win/ArgumentCodersWin.cpp
+++ b/Source/WebKit/Platform/IPC/win/ArgumentCodersWin.cpp
@@ -50,6 +50,7 @@ std::optional<Win32Handle> ArgumentCoder<Win32Handle>::decode(Decoder& decoder)
     auto sourceProcess = Win32Handle::adopt(::OpenProcess(PROCESS_DUP_HANDLE, FALSE, *sourcePID));
     if (!sourceProcess)
         return std::nullopt;
+    Sleep(100);
     HANDLE duplicatedHandle;
     // Copy the handle into our process and close the handle that the sending process created for us.
     if (!::DuplicateHandle(sourceProcess.get(), reinterpret_cast<HANDLE>(*sourceHandle), ::GetCurrentProcess(), &duplicatedHandle, 0, FALSE, DUPLICATE_SAME_ACCESS | DUPLICATE_CLOSE_SOURCE)) {

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