ICE from inside libserialize (index out of bounds)

[sdleffler]

Dealing with the (now current) issues with nightly cargo, I decided to run cargo update, rustup default stable and then cargo build. The result was this:

sean@sean-Samus:~/Projects/tll-array$ RUST_BACKTRACE=1 cargo build --verbose
       Fresh type-operators v0.3.4
       Fresh void v1.0.2
       Fresh type-level-logic v0.1.0
       Fresh unreachable v0.1.1
       Fresh tll-iterator v0.1.0 (https://github.com/sdleffler/tll-iterator-rs.git#95b65ff1)
   Compiling tll-array v0.1.0 (file:///home/sean/Projects/tll-array)
     Running `rustc src/lib.rs --crate-name tll_array --crate-type lib -g -C metadata=60569300049d440b --out-dir /home/sean/Projects/tll-array/target/debug/deps --emit=dep-info,link -L dependency=/home/sean/Projects/tll-array/target/debug/deps --extern type_operators=/home/sean/Projects/tll-array/target/debug/deps/libtype_operators-d56a22000476e4e5.rlib --extern unreachable=/home/sean/Projects/tll-array/target/debug/deps/libunreachable-cf0b03299c3c2c2d.rlib --extern tll_iterator=/home/sean/Projects/tll-array/target/debug/deps/libtll_iterator-0e29413326ade8e9.rlib --extern type_level_logic=/home/sean/Projects/tll-array/target/debug/deps/libtype_level_logic-8b7ddf90d709f195.rlib`
error: internal compiler error: unexpected panic

note: the compiler unexpectedly panicked. this is a bug.

note: we would appreciate a bug report: https://github.com/rust-lang/rust/blob/master/CONTRIBUTING.md#bug-reports

note: run with `RUST_BACKTRACE=1` for a backtrace

thread 'rustc' panicked at 'index out of bounds: the len is 109251 but the index is 109251', ../src/libserialize/leb128.rs:46
stack backtrace:
   1:     0x7fe4a217885f - std::sys::backtrace::tracing::imp::write::h6f1d53a70916b90d
   2:     0x7fe4a2187dbd - std::panicking::default_hook::{{closure}}::h137e876f7d3b5850
   3:     0x7fe4a218522e - std::panicking::default_hook::h0ac3811ec7cee78c
   4:     0x7fe4a2185918 - std::panicking::rust_panic_with_hook::hc303199e04562edf
   5:     0x7fe4a21857b2 - std::panicking::begin_panic::h6ed03353807cf54d
   6:     0x7fe4a21856f0 - std::panicking::begin_panic_fmt::hc321cece241bb2f5
   7:     0x7fe4a2185671 - rust_begin_unwind
   8:     0x7fe4a21d2fff - core::panicking::panic_fmt::h27224b181f9f037f
   9:     0x7fe4a21d2fa3 - core::panicking::panic_bounds_check::h19e9bbc59320a57e
  10:     0x7fe49b5082ef - <serialize::opaque::Decoder<'a> as serialize::serialize::Decoder>::read_usize::hdb6b9929c2878103
  11:     0x7fe49fde1798 - rustc_metadata::decoder::<impl rustc_metadata::cstore::MetadataBlob>::get_root::ha0bece0640a71bb4
  12:     0x7fe49fe0a3bf - rustc_metadata::loader::Context::extract_one::h893f537a80fcaa7b
  13:     0x7fe49fe07729 - rustc_metadata::loader::Context::find_library_crate::h0ae9ebab39601e07
  14:     0x7fe49fdf60b9 - rustc_metadata::creader::CrateReader::load::hbbb9048f37b5929d
  15:     0x7fe49fdf54d8 - rustc_metadata::creader::CrateReader::resolve_crate::h0ea8ce3f005d5018
  16:     0x7fe49fe1359a - rustc_metadata::creader::CrateReader::resolve_crate_deps::{{closure}}::hba6352ef73c55dfc
  17:     0x7fe49fd87c16 - <std::collections::hash::map::HashMap<K, V, S> as core::iter::traits::FromIterator<(K, V)>>::from_iter::hfdd794029d934f9e
  18:     0x7fe49fdf384f - rustc_metadata::creader::CrateReader::register_crate::h5c79c40329468538
  19:     0x7fe49fdf5853 - rustc_metadata::creader::CrateReader::resolve_crate::h0ea8ce3f005d5018
  20:     0x7fe49fdfdf86 - <rustc_metadata::creader::CrateLoader<'a> as rustc::middle::cstore::CrateLoader>::process_item::h2c1f1f8ea009fc17
  21:     0x7fe4a1756cfa - <rustc_resolve::build_reduced_graph::BuildReducedGraphVisitor<'a, 'b> as syntax::visit::Visitor>::visit_item::hca6f65f5d1f072d8
  22:     0x7fe4a1755fbe - rustc_resolve::build_reduced_graph::<impl rustc_resolve::Resolver<'b>>::build_reduced_graph::h394847c4f1568da6
  23:     0x7fe4a254417b - rustc_driver::driver::phase_2_configure_and_expand::{{closure}}::hdfad824fa7e49709
  24:     0x7fe4a24faa58 - rustc_driver::driver::phase_2_configure_and_expand::h2f62e5b496da5c2b
  25:     0x7fe4a24f1efb - rustc_driver::driver::compile_input::hef221f9f618e92f5
  26:     0x7fe4a251e206 - rustc_driver::run_compiler::h7dddd4089f8330b4
  27:     0x7fe4a245a2c3 - std::panicking::try::do_call::h1e3ece12e3f812df
  28:     0x7fe4a218fcb6 - __rust_maybe_catch_panic
  29:     0x7fe4a24784f9 - <F as alloc::boxed::FnBox<A>>::call_box::h05b222e46803eb30
  30:     0x7fe4a2183c80 - std::sys::thread::Thread::new::thread_start::h759e10bc4abc7e72
  31:     0x7fe49b0cd6f9 - start_thread
  32:     0x7fe4a1e47b5c - clone
  33:                0x0 - <unknown>

error: Could not compile `tll-array`.

Caused by:
  process didn't exit successfully: `rustc src/lib.rs --crate-name tll_array --crate-type lib -g -C metadata=60569300049d440b --out-dir /home/sean/Projects/tll-array/target/debug/deps --emit=dep-info,link -L dependency=/home/sean/Projects/tll-array/target/debug/deps --extern type_operators=/home/sean/Projects/tll-array/target/debug/deps/libtype_operators-d56a22000476e4e5.rlib --extern unreachable=/home/sean/Projects/tll-array/target/debug/deps/libunreachable-cf0b03299c3c2c2d.rlib --extern tll_iterator=/home/sean/Projects/tll-array/target/debug/deps/libtll_iterator-0e29413326ade8e9.rlib --extern type_level_logic=/home/sean/Projects/tll-array/target/debug/deps/libtype_level_logic-8b7ddf90d709f195.rlib` (exit code: 101)

sean@sean-Samus:~/Projects/tll-array$ cargo --version --verbose
cargo 0.13.0-nightly (eca9e15 2016-11-01)

sean@sean-Samus:~/Projects/tll-array$ rustc --version --verbose
rustc 1.13.0 (2c6933acc 2016-11-07)
binary: rustc
commit-hash: 2c6933acc05c61e041be764cb1331f6281993f3f
commit-date: 2016-11-07
host: x86_64-unknown-linux-gnu
release: 1.13.0

I'm not sure that any of my code itself was responsible for this ICE, so I haven't pasted/linked any of it here. If that is not the case, please let me know.

Tesing a little further, this also occurs with beta rustc:

sean@sean-Samus:~/Projects/tll-array$ rustc --version --verbose
rustc 1.14.0-beta.2 (e627a2e6e 2016-11-16)
binary: rustc
commit-hash: e627a2e6edbc7b7fd205de8ca7c86cff76655f4d
commit-date: 2016-11-16
host: x86_64-unknown-linux-gnu
release: 1.14.0-beta.2
LLVM version: 3.9

[est31]

This looks like its a dupe of #37803 ...

[sdleffler]

@est31 seems likely enough. I got it to work again after switching back to nightly, anyways.