Compiler crash: Expected label id but found style

[edef1c]

rustc 0.11.0-pre (443a1cd 2014-06-08 14:56:52 -0700)
host: x86_64-unknown-linux-gnu

 ~/code/sulphur ⮀ ⭠ master± ⮀ make RUST_BACKTRACE=1
rustc -L vendor -g -O --crate-type staticlib --target x86_64-intel-linux -o kernel.a -Z lto src/kernel.rs
error: internal compiler error: unexpected failure
note: the compiler hit an unexpected failure path. this is a bug.
note: we would appreciate a bug report: http://doc.rust-lang.org/complement-bugreport.html
note: run with `RUST_BACKTRACE=1` for a backtrace
task 'rustc' failed at 'called `Result::unwrap()` on an `Err` value: Expected(Expected label id but found style)', /build/rust-git/src/rust/src/libcore/result.rs:545

stack backtrace:
   1:     0x7ff302a4d570 - rt::backtrace::imp::write::hf7f0193b62c10642jft::v0.11.0.pre
   2:     0x7ff302a54ca0 - <unknown>
   3:     0x7ff304dfef60 - unwind::begin_unwind_inner::hb191b1c2cc278613x2c::v0.11.0.pre
   4:     0x7ff304dfe9f0 - unwind::begin_unwind_fmt::hd9fbea452e71602eZZc::v0.11.0.pre
   5:     0x7ff304dfe9b0 - rust_begin_unwind
   6:     0x7ff304e46770 - failure::begin_unwind::h4ff9994309231abcSZv::v0.11.0.pre
   7:     0x7ff305732520 - middle::astencode::decode_inlined_item::h9446e2466a542596AUW::v0.11.0.pre
   8:     0x7ff305c758f0 - <unknown>
   9:     0x7ff305fbdd40 - metadata::decoder::maybe_get_item_ast::hd031e1bb33f639a1mMi::v0.11.0.pre
  10:     0x7ff305c74f40 - middle::const_eval::lookup_variant_by_id::h4bbc7dec36d34755rdW::v0.11.0.pre
  11:     0x7ff305879600 - middle::const_eval::lookup_const::h3a3853db3e30b204ycW::v0.11.0.pre
  12:     0x7ff305c77560 - <unknown>
  13:     0x7ff305c79ee0 - <unknown>
  14:     0x7ff305c79ee0 - <unknown>
  15:     0x7ff305c79ee0 - <unknown>
  16:     0x7ff305c7b360 - <unknown>
  17:     0x7ff305c7ae00 - <unknown>
  18:     0x7ff305c7ad00 - <unknown>
  19:     0x7ff305c7ac40 - <unknown>
  20:     0x7ff305c79ee0 - <unknown>
  21:     0x7ff305c79ee0 - <unknown>
  22:     0x7ff305c7ab60 - <unknown>
  23:     0x7ff305c79ee0 - <unknown>
  24:     0x7ff305c7ad00 - <unknown>
  25:     0x7ff305c7ac40 - <unknown>
  26:     0x7ff305c79ee0 - <unknown>
  27:     0x7ff305c7ad00 - <unknown>
  28:     0x7ff305c7ac40 - <unknown>
  29:     0x7ff305c7b9f0 - <unknown>
  30:     0x7ff305c7c080 - <unknown>
  31:     0x7ff305c7b360 - <unknown>
  32:     0x7ff305c7b360 - <unknown>
  33:     0x7ff305c79580 - middle::const_eval::process_crate::h72f6e727ec2afa69GnW::v0.11.0.pre
  34:     0x7ff305ffdd60 - driver::driver::phase_3_run_analysis_passes::h8c47e84f701a29a6DGn::v0.11.0.pre
  35:     0x7ff305ff7180 - driver::driver::compile_input::ha184fa62dc9d3b37dwn::v0.11.0.pre
  36:     0x7ff3060bf4a0 - <unknown>
  37:     0x7ff3060bf3c0 - <unknown>
  38:     0x7ff3060d9b80 - <unknown>
  39:     0x7ff3060d4e20 - <unknown>
  40:     0x7ff305146800 - <unknown>
  41:     0x7ff304dfc510 - <unknown>
  42:     0x7ff304e60ef0 - rust_try
  43:     0x7ff304dfe550 - unwind::try::h5e1236a7876941deTQc::v0.11.0.pre
  44:     0x7ff304dfc390 - task::Task::run::h10ae6b6004d94ab7qxc::v0.11.0.pre
  45:     0x7ff3051465a0 - <unknown>
  46:     0x7ff302a4c9c0 - <unknown>
  47:     0x7ff302783060 - start_thread
  48:     0x7ff304ad5489 - __clone
  49:                0x0 - <unknown>

Makefile:17: recipe for target 'kernel.a' failed
make: *** [kernel.a] Error 101

[alexcrichton]

Could you provide a smaller example which triggers this error? If not, we could use creduce as well to slim down this use case.

[edef1c]

It seems that recompiling the libraries I was using fixed this (I'm not sure why)

[alexcrichton]

Ok, we have a few other issues open for using a stale library, such as #14748, so I'm going to close this in favor of those.