Switch with fall through throws "System.InvalidProgramException: 'Common Language Runtime detected an invalid program.'"

[JMPSequeira]

Using .NET 5 with the following code:

var param = Expression.Parameter(typeof(int), "p");
var label = Expression.Label(typeof(string));
var switchStatement = Expression.Switch(
	typeof(void),
	param,
	Expression.Return(label, Expression.Constant("bar")),
	null,
	Expression.SwitchCase(Expression.Return(label, Expression.Constant("foo")),
			  Expression.Constant(1),
			  Expression.Constant(2)));

var lambda = Expression.Lambda<Func<int, string>>(
	Expression.Block(
		switchStatement,
		Expression.Label(label, Expression.Constant(string.Empty)))
	, param);

var compiled = lambda.Compile();

var res = compiled(1); // "foo"

var compiledFast = lambda.CompileFast();

var resFast = compiledFast(1);

[dadhi]

Thanks for the compact reproduction code. Will check.

[dadhi]

@JMPSequeira The FEC v3.2.1 with the fix is released on NuGet