No nullability warning for type inference with lambda argument #30480
Description
Method type inference should report a warning that nullability could not be inferred:
using System;
using System.Runtime.CompilerServices;
[module: NonNullTypes]
interface I<T> { }
class C
{
static void F<T>(Func<bool, T> f)
{
}
static void G(I<object> x, I<object?> y)
{
F(b => { if (b) return x; else return y; }); // warning: cannot infer nullability
}
}