A bit more flexibility in fast path test case code preprocessing Added failing fast path hotload test for changing method signatures ILHotload: changes must be specifically within a BlockSyntax of a method Added Compiler.UpdateParseOptions() for tests to use Don't use ILHotload if a preprocessor define changed Incremental syntax tree parsing Throw when trying to debug an ILHotload swap during a test Basic incremental compilation Make generated code more deterministic, nicer for incremental compile Keep track of which assembly types are actually loaded from