DisplayClass not removed

[greenozon]

ILSpy version 6.0.0.5450-preview1

goto method DirectoryCopy()
you'll see something like

<>c__DisplayClass2_2 CS$<>8__locals0 = default(<>c__DisplayClass2_2);
....

https://www.sendspace.com/file/ol1dwq

[greenozon]

also method
private async void Check()

[dgrunwald]

Method DirectoryCopy is broken; there are code paths (e.g. sourceDirName.Length > 260) where the compiler-generated display class variable is accessed without ever being initialized --> compiler-generated code throws NullReferenceException.
That should never happen for compiler-generated display class variables. ILSpy needs to emit code that preserves the potential NullReferenceException, which means it needs to keep the display class around.
Possible a bug in whichever compiler was used to build this assembly?

Check() looks like something that we could fix in our transform. (it already decompiles cleanly if "Always inline local variables" is enabled)