Mono compilation fails

[ghost]

Using current master, trying to compile any mono project fails with the error ObjectType/TextEdit.cs(349,77): Unexpected symbol '='. I tried removing the .local/share/godot/mono directory entirely but I'm getting the same error.
Line 349 is

public void CursorSetLine(int line, bool adjustViewport, canBeHidden = true, bool arg2 = true)

so canBeHidden doesn't have type

[neikeq]

It's because the second and third parameter are registered as a single one: "adjust_viewport, can_be_hidden".