[bmacho]

> Although it doesn't have the same level of compile-time guarantees, there are runtime checks to ensure memory safety if you use Debug or ReleaseSafe.

it is not very good, as

    const std = @import("std");
    const print = std.debug.print;

    fn foo() fn() *u32 {
        
        const T = struct {

            fn bar() *u32 {
                var x: u32 = 123;
                return &x;
            }

        };
        
        return T.bar;
    }

    pub fn main() void {

        print("Resultt: {}", .{foo()().*});

    }

outputs 123 in debug[0] and 0 in ReleaseSafe[1] instead of giving a Runtime Error.

[0] https://zig.godbolt.org/z/ezTr3zP6a

[1] https://zig.godbolt.org/z/3ExeveT69