StartInfo_NotepadWithContent* tests are failing in CI

[wfurt]

We have 348 failures in last 30 days. This is predominately on server20h1 queue:

Assert.StartsWith() Failure:\r\nExpected: StartInfo_NotepadWithContent_withArgumentList_1156_a34ea3f3\r\nActual:   
   at System.Diagnostics.Tests.ProcessStartInfoTests.StartInfo_NotepadWithContent_withArgumentList(Boolean useShellExecute) in /_/src/libraries/System.Diagnostics.Process/tests/ProcessStartInfoTests.cs:line 1179

there are few other failures where this fails on various Windows 8-10 with

System.InvalidOperationException : Failed to set the specified COM apartment state.
   at System.Threading.Thread.SetApartmentState(ApartmentState state) in /_/src/libraries/System.Private.CoreLib/src/System/Threading/Thread.cs:line 238
   at System.Diagnostics.Process.ShellExecuteHelper.ShellExecuteOnSTAThread() in /_/src/libraries/System.Diagnostics.Process/src/System/Diagnostics/Process.Win32.cs:line 169
   at System.Diagnostics.Process.StartWithShellExecuteEx(ProcessStartInfo startInfo) in /_/src/libraries/System.Diagnostics.Process/src/System/Diagnostics/Process.Win32.cs:line 79
   at System.Diagnostics.Process.StartCore(ProcessStartInfo startInfo) in /_/src/libraries/System.Diagnostics.Process/src/System/Diagnostics/Process.Win32.cs:line 24
   at System.Diagnostics.Process.Start() in /_/src/libraries/System.Diagnostics.Process/src/System/Diagnostics/Process.cs:line 1234
   at System.Diagnostics.Process.Start(ProcessStartInfo startInfo) in /_/src/libraries/System.Diagnostics.Process/src/System/Diagnostics/Process.cs:line 1302
   at System.Diagnostics.Tests.ProcessStartInfoTests.StartInfo_NotepadWithContent_withArgumentList(Boolean useShellExecute) in /_/src/libraries/System.Diagnostics.Process/tests/ProcessStartInfoTests.cs:line 1169
   at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture) in /_/src/mono/netcore/System.Private.CoreLib/src/System/Reflection/RuntimeMethodInfo.cs:line 385

[ghost]

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[danmoseley]

Those are different problems. In the first one, it's somehow not getting the window title (race?)

[danmoseley]

@wfurt any sign of this diagnostic in the output (assuming there are failures on debug bits)

runtime/src/libraries/System.Diagnostics.Process/src/System/Diagnostics/Process.Win32.cs

Line 200 in c87e75e

Debug.Assert(error == 0, $"Failed GetWindowTextLengthW(): { new Win32Exception(error).Message }");

runtime/src/libraries/System.Diagnostics.Process/src/System/Diagnostics/Process.Win32.cs

Line 219 in c87e75e

Debug.Assert(error == 0, $"Failed GetWindowTextW(): { new Win32Exception(error).Message }");

[wfurt]

not really, but I can look at more failures. I was wondering if the new queue even have Notepad :)

[danmoseley]

Apparently it does as they got a Process object.

[danmoseley]

The apartment state issue on non-Server Core occurred 10 times in 10/3-10/8 and not once previously or subsequently looking back 6 months. So I believe it was something elsewhere that is now fixed.

#44972 will fix both for Server Core.

[danmoseley]

Closing as I don't think we will take more action here.