Comptime falsy accepted

[DutchGhost]

The following code compiles, but shouldn't:

const std = @import("std");

fn foo() type {
    return struct {
        var N: usize = 0;

        fn init() @This() {
            comptime {
                N += 1;
            }
            return .{};
        }

        fn num(this: *const @This()) usize {
            comptime {
                N += 1;
            }

            return N;
        }
    };
}

pub fn main() anyerror!void {
    var one = foo().init();
    var two = foo().init();
    std.debug.print("{}  {}  {}  {}\n", .{ one.num(), two.num(), one.num(), two.num() });
}

Notice how it has two comptime { N += 1; } blocks, while in reality it's a runtime add I believe, https://godbolt.org/z/JKrscX