ICE because uninhabited types and drop flags don't mix

[ben0x539]

enum Foo {}
impl Drop for Foo {
    fn drop(&mut self) {}
}

fn main() {
    unsafe { std::ptr::read(&1u8 as *const u8 as *const Foo) };
}

=> task 'rustc' failed at 'assertion failed: type_is_zero_size(bcx.ccx(), block_ty)'

Producing the value of the uninhabited type with transmute instead of ptr::read works "as expected". Another workaround is, of course, #![unsafe_no_drop_flag]. ;)

[steveklabnik]

This still ICEs for me today.

[tamird]

Still ICEs.

[steveklabnik]

This no longer ICEs as of today's nightly.