what.zig

export fn foo1() void {
    comptime {
        var buf = [_]u8{ 'a', 'b', 'c', 'd' } ++ [_]u8{undefined} ** 10;
        var target: [*]u8 = &buf; 
        const slice = target[0..3 :0];

        // above after resolving slice instruction target,
        // debugger shows `target`: (ZigValue).data.x_ptr.special == ConstPtrSpecialBaseArray
    }
}
export fn foo2() void {
    comptime {
        var buf = [_]u8{ 'a', 'b', 'c', 'd' } ++ [_]u8{undefined} ** 10;
        var target: [*]u8 = @ptrCast([*]u8, &buf); 
        const slice = target[0..3 :0];

        // above after resolving slice instruction target,
        // debugger shows `target`: (ZigValue).data.x_ptr.special == ConstPtrSpecialRef
    }
}

pub fn panic(msg: []const u8, error_return_trace: ?*@import("builtin").StackTrace) noreturn {
    while (true) {}
}