ICE: reference to enum with unsized variant

[hroi]

Compiling this program results in an internal compiler error:

pub enum X {
    A([u8]),
}

pub fn crash(_: &X) {
}

fn main () {
}

Error:

error: internal compiler error: ../src/librustc_trans/type_of.rs:168: Unexpected tail in unsized_info_ty: X for ty=X

Meta

rustc --version --verbose:

rustc 1.13.0-nightly (32571c05c 2016-09-17)
binary: rustc
commit-hash: 32571c05c82c3b0fcb5d38afe03542226ca25d2d
commit-date: 2016-09-17
host: x86_64-apple-darwin
release: 1.13.0-nightly

Backtrace:

thread 'rustc' panicked at 'Box<Any>', ../src/librustc_errors/lib.rs:655
stack backtrace:
   1:        0x110d835ca - std::sys::backtrace::tracing::imp::write::h4b09e6e8c01db097
   2:        0x110d9a8df - std::panicking::default_hook::{{closure}}::h1d3243f546573ff4
   3:        0x110d8fb9d - std::panicking::default_hook::h96c288d728df3ebf
   4:        0x110d90236 - std::panicking::rust_panic_with_hook::hb1322e5f2588b4db
   5:        0x110c4cc9a - std::panicking::begin_panic::hb7c71bbc491f561c
   6:        0x110c5d53a - rustc_errors::Handler::bug::h6a6af37ebad32a7a
   7:        0x10da01e3c - rustc::session::opt_span_bug_fmt::{{closure}}::h6ad7caa20ac20c4b
   8:        0x10d90ede9 - rustc::session::opt_span_bug_fmt::h38eb39636c07401c
   9:        0x10d90eb9a - rustc::session::bug_fmt::hd87c9038863af104
  10:        0x10cd09f8e - rustc_trans::type_of::unsized_info_ty::h132bf430b36779eb
  11:        0x10cd0a7d9 - rustc_trans::type_of::in_memory_type_of::hf0cd4d9282527edd
  12:        0x10cd19862 - rustc_trans::abi::FnType::unadjusted::{{closure}}::h5537ccf1f99ab669
  13:        0x10cc6e21f - rustc_trans::abi::FnType::unadjusted::h8793d87ae977adf3
  14:        0x10ccc57bb - rustc_trans::declare::declare_fn::hce6425d700e974bd
  15:        0x10cd0236b - rustc_trans::trans_item::TransItem::predefine::had5467b037998671
  16:        0x10cc824f5 - rustc_trans::base::trans_crate::h45437752c34c2c6e
  17:        0x10c955e31 - rustc_driver::driver::phase_4_translate_to_llvm::h1b8076dc9a7a3e1b
  18:        0x10c98f91f - rustc_driver::driver::compile_input::{{closure}}::hdf708031c67974d4
  19:        0x10c9819a2 - rustc_driver::driver::phase_3_run_analysis_passes::{{closure}}::hcac3a2328cd9259a
  20:        0x10c94e8b7 - rustc_driver::driver::phase_3_run_analysis_passes::h9865057b323cad0e
  21:        0x10c94143c - rustc_driver::driver::compile_input::hc0edbed7edb3eb18
  22:        0x10c96a348 - rustc_driver::run_compiler::h22d678d32fb7c300
  23:        0x10c8aa540 - std::panicking::try::do_call::h4d040997e2efdaf3
  24:        0x110d9ae9a - __rust_maybe_catch_panic
  25:        0x10c8c9e34 - <F as alloc::boxed::FnBox<A>>::call_box::hba0b436c79e56b23
  26:        0x110d8ee34 - std::sys::thread::Thread::new::thread_start::h022e3887023c6290
  27:     0x7fff8aecd99c - _pthread_body
  28:     0x7fff8aecd919 - _pthread_start

[apasel422]

Duplicate of #16812.