C:\h\w\978B085D\w\BCF809C9\e>set COMPlus 
COMPlus_JitStress=250
COMPlus_TieredCompilation=0

C:\h\w\978B085D\w\BCF809C9\e>call RunTests.cmd --runtime-path C:\h\w\978B085D\p 
----- start Sat 09/24/2022 19:32:50.84 ===============  To repro directly: ===================================================== 
pushd C:\h\w\978B085D\w\BCF809C9\e\
"C:\h\w\978B085D\p\dotnet.exe" exec --runtimeconfig System.Threading.Tasks.Dataflow.Tests.runtimeconfig.json --depsfile System.Threading.Tasks.Dataflow.Tests.deps.json xunit.console.dll System.Threading.Tasks.Dataflow.Tests.dll -xml testResults.xml -nologo -nocolor -notrait category=IgnoreForCI -notrait category=OuterLoop -notrait category=failing 
popd
===========================================================================================================

C:\h\w\978B085D\w\BCF809C9\e>"C:\h\w\978B085D\p\dotnet.exe" exec --runtimeconfig System.Threading.Tasks.Dataflow.Tests.runtimeconfig.json --depsfile System.Threading.Tasks.Dataflow.Tests.deps.json xunit.console.dll System.Threading.Tasks.Dataflow.Tests.dll -xml testResults.xml -nologo -nocolor -notrait category=IgnoreForCI -notrait category=OuterLoop -notrait category=failing  
  Discovering: System.Threading.Tasks.Dataflow.Tests (method display = ClassAndMethod, method display options = None)
  Discovered:  System.Threading.Tasks.Dataflow.Tests (found 328 of 336 test cases)
  Starting:    System.Threading.Tasks.Dataflow.Tests (parallel test collections = on, max threads = 4)

Assert failure(PID 2968 [0x00000b98], Thread: 744 [0x02e8]): Assertion failed 'h->bbFallsThrough()' in 'System.Threading.Tasks.Dataflow.Internal.JoinBlockTarget`1[double]:ReserveOneMessage():bool:this' during 'Find loops' (IL size 159; hash 0x9e5d913f; FullOpts)

    File: D:\a\_work\1\s\src\coreclr\jit\optimizer.cpp Line: 3199
    Image: C:\h\w\978B085D\p\dotnet.exe