Fails to pass Constant as call parameter by-reference

[dadhi]

See #438 for the context.

When attempting to pass results as ref to a lambda, we ran into problems. We've implemented a workaround by assigning the result to a local variable first before passing it to the lambda.

// FEC throws System.InvalidProgramException: Common Language Runtime detected an invalid program.
// WORKAROUND: Assign to local variable and pass variable by ref

var callRefMethod = typeof( TestClass ).GetMethod( nameof( TestClass.MethodThatTakesARef ) );

var block = Block(
    typeof( int ),
    Call( callRefMethod!, Constant( 42 ) )
);

var lambda = Lambda<Func<int>>( block );
var compiledLambda = lambda.CompileFast();