Why Can't I stackalloc delegates?

[Xyncgas]

            Span< λ > k = new λ[5]; //works
            Span< λ > k = stackalloc λ[5]; //doesn't compile

[heathbm]

The error message my IDE provides is: "Cannot declare a pointer to a managed type 'Delegate'"

[huoyaoyuan]

You can't stackalloc for any reference type either.
The direct reason is that the result of stackalloc IL instruction is a pointer. The span is synthesized by C# compiler.
There is already a proposal to enable stackalloc for reference type: #11192

[BreyerW]

Also you can get function pointer directly from static method if you care about perf. Not array of func pointers tho afaik