ICE: ERROR:rbml::reader: failed to find block with tag 7

[japaric]

Found this while refactoring my library after the Vector -> Slice rename

STR:

use std::{mem, raw};

fn main() {
    let a = &[1, 2, 3i];
    let raw::Slice { data: ptr, len: len }: raw::Slice<int> = unsafe { mem::transmute(a) };
    let b = unsafe { mem::transmute(Slice { data: ptr, len: len }) };
    // ICE                          ^~~ forgot the `raw::` qualifier
}

Backtrace:

task 'rustc' failed at 'explicit failure', /var/tmp/paludis/build/dev-lang-rust-scm/work/rust-scm/src/librbml/lib.rs:246

stack backtrace:
   1:     0x7fadbcf65980 - rt::backtrace::imp::write::h500c7cd49c94d6cbo1q
   2:     0x7fadbcf68a20 - <unknown>
   3:     0x7fadc14ddc40 - unwind::begin_unwind_inner::h78b0bc3908c6581cM8d
   4:     0x7fadc03d5310 - <unknown>
   5:     0x7fadc03d4340 - reader::get_doc::h659c9cb63ec6b27dQRa
   6:     0x7fadc23b9d40 - metadata::decoder::get_type::h8aa840f508fceb99Bis
   7:     0x7fadc1df73b0 - middle::ty::lookup_item_type::h0762f54f39bdc9b9J5G
   8:     0x7fadc2154ec0 - <unknown>
   9:     0x7fadc2152820 - <unknown>
  10:     0x7fadc2154ec0 - <unknown>
  11:     0x7fadc211dba0 - <unknown>
  12:     0x7fadc2154ec0 - <unknown>
  13:     0x7fadc21b39c0 - middle::typeck::check::check_decl_local::h2a1925bfb9a5b157XEW
  14:     0x7fadc21b3be0 - middle::typeck::check::check_stmt::he6d6f56b73c868b94GW
  15:     0x7fadc211dba0 - <unknown>
  16:     0x7fadc2119930 - <unknown>
  17:     0x7fadc2119650 - <unknown>
  18:     0x7fadc2112510 - middle::typeck::check::check_item::h9d5462bdf5870d8fxhS
  19:     0x7fadc2119450 - middle::typeck::check::check_item_types::h60cfbf824eb42ae21HR
  20:     0x7fadc1b2a150 - <unknown>
  21:     0x7fadc23275c0 - middle::typeck::check_crate::h322ddeef25afc167p2i
  22:     0x7fadc23f6af0 - driver::driver::phase_3_run_analysis_passes::h01e8a18355fa9e80Vsx
  23:     0x7fadc23f1c30 - driver::driver::compile_input::h7879a63579b438beafx
  24:     0x7fadc249d400 - <unknown>
  25:     0x7fadc249d310 - <unknown>
  26:     0x7fadc24afc60 - <unknown>
  27:     0x7fadc24afa60 - <unknown>
  28:     0x7fadc1838b30 - <unknown>
  29:     0x7fadc152d970 - <unknown>
  30:     0x7fadc152d960 - rust_try
  31:     0x7fadc14db2a0 - unwind::try::h36697dac480a0e50hXd
  32:     0x7fadc14db040 - task::Task::run::h0fb2de2c85c53b00T4c
  33:     0x7fadc18388f0 - <unknown>
  34:     0x7fadc14dce80 - <unknown>
  35:     0x7fadbc2e0000 - start_thread
  36:     0x7fadc11ac269 - clone
  37:                0x0 - <unknown>

Version:

rustc 0.12.0-pre (a8c8e3f80 2014-08-14 19:11:18 +0000)

[mrmonday]

I believe this is a duplicate of #12919.

[japaric]

I believe this is a duplicate of #12919.

Yes, it is.

However, I can't reproduce this anymore with 0.12 or with:

rustc 0.13.0-dev (7dbd4349c 2014-10-13 10:32:43 +0000)

I think it's no longer ICEing because the current Slice in the prelude is std::ops::Slice, whereas at the moment of the bug report the Slice in the prelude was core::slice::Slice. I wonder if the ICE trigger was the number of generic parameters that the trait accepts? (two for ops::Slice vs one for slice::Slice)

Anyhow, I'm closing this issue since it no longer contains a valid STR.