rustc (nightly) unexpected panic on librustc_errors

[editicalu]

Code

use nalgebra as na;
use na::base::MatrixN;

fn main() {
    let a: MatrixN<f64, 1000> = Matrix::zero();
    let b: MatrixN<f64, 1000> = Matrix::zero();
}

Backtrace

$ RUST_BACKTRACE=1 cargo run --verbose
       Fresh autocfg v0.1.2
       Fresh rand_core v0.4.0
       Fresh rawpointer v0.1.0
       Fresh libm v0.1.2
       Fresh rand_core v0.3.1
       Fresh rand_jitter v0.1.3
       Fresh libc v0.2.50
       Fresh matrixmultiply v0.2.2
       Fresh num-traits v0.2.6
       Fresh typenum v1.10.0
       Fresh rand_hc v0.1.0
       Fresh rand_isaac v0.1.1
       Fresh rand_xorshift v0.1.1
       Fresh rand_pcg v0.1.2
       Fresh rand_os v0.1.3
       Fresh num-complex v0.2.1
       Fresh approx v0.3.1
       Fresh rand_chacha v0.1.1
       Fresh generic-array v0.12.0
       Fresh alga v0.8.2
       Fresh rand v0.6.5
       Fresh nalgebra v0.17.2
   Compiling matrixmult v0.1.0 (/home/wardsegers/matrixmult)
     Running `rustc --edition=2018 --crate-name matrixmult src/main.rs --color always --crate-type bin --emit=dep-info,link -C debuginfo=2 -C metadata=7ba3d38049e999da -C extra-filename=-7ba3d38049e999da --out-dir /home/wardsegers/matrixmult/target/debug/deps -C incremental=/home/wardsegers/matrixmult/target/debug/incremental -L dependency=/home/wardsegers/matrixmult/target/debug/deps --extern nalgebra=/home/wardsegers/matrixmult/target/debug/deps/libnalgebra-dd81d53f99533f4a.rlib`
error[E0433]: failed to resolve: use of undeclared type or module `Matrix`
 --> src/main.rs:5:33
  |
5 |     let a: MatrixN<f64, 1000> = Matrix::zero();
  |                                 ^^^^^^ use of undeclared type or module `Matrix`

error[E0433]: failed to resolve: use of undeclared type or module `Matrix`
 --> src/main.rs:6:33
  |
6 |     let b: MatrixN<f64, 1000> = Matrix::zero();
  |                                 ^^^^^^ use of undeclared type or module `Matrix`

error[E0107]: wrong number of type arguments: expected 2, found 1
 --> src/main.rs:5:12
  |
5 |     let a: MatrixN<f64, 1000> = Matrix::zero();
  |            ^^^^^^^^^^^^^^^^^^ expected 2 type arguments

error[E0107]: wrong number of type arguments: expected 2, found 1
 --> src/main.rs:6:12
  |
6 |     let b: MatrixN<f64, 1000> = Matrix::zero();
  |            ^^^^^^^^^^^^^^^^^^ expected 2 type arguments

error: internal compiler error: src/librustc_typeck/collect.rs:1322: unexpected const parent in type_of_def_id(): Ty(type(MatrixN<f64, >))

thread 'rustc' panicked at 'Box<Any>', src/librustc_errors/lib.rs:620:9
stack backtrace:
   0: std::sys::unix::backtrace::tracing::imp::unwind_backtrace
             at src/libstd/sys/unix/backtrace/tracing/gcc_s.rs:39
   1: std::sys_common::backtrace::_print
             at src/libstd/sys_common/backtrace.rs:71
   2: std::panicking::default_hook::{{closure}}
             at src/libstd/sys_common/backtrace.rs:59
             at src/libstd/panicking.rs:197
   3: std::panicking::default_hook
             at src/libstd/panicking.rs:211
   4: rustc::util::common::panic_hook
   5: std::panicking::rust_panic_with_hook
             at src/libstd/panicking.rs:478
   6: std::panicking::begin_panic
   7: rustc_errors::Handler::bug
   8: rustc::util::bug::opt_span_bug_fmt::{{closure}}
   9: rustc::ty::context::tls::with_opt::{{closure}}
  10: rustc::ty::context::tls::with_context_opt
  11: rustc::ty::context::tls::with_opt
  12: rustc::util::bug::opt_span_bug_fmt
  13: rustc::util::bug::bug_fmt
  14: rustc_typeck::collect::type_of
  15: rustc::ty::query::__query_compute::type_of
  16: rustc::ty::query::<impl rustc::ty::query::config::QueryAccessors<'tcx> for rustc::ty::query::queries::type_of<'tcx>>::compute
  17: rustc::dep_graph::graph::DepGraph::with_task_impl
  18: rustc::ty::query::plumbing::<impl rustc::ty::context::TyCtxt<'a, 'gcx, 'tcx>>::get_query
  19: rustc::ty::context::GlobalCtxt::enter_local
  20: rustc_typeck::check::typeck_tables_of
  21: rustc::ty::query::__query_compute::typeck_tables_of
  22: rustc::ty::query::<impl rustc::ty::query::config::QueryAccessors<'tcx> for rustc::ty::query::queries::typeck_tables_of<'tcx>>::compute
  23: rustc::dep_graph::graph::DepGraph::with_task_impl
  24: rustc::ty::query::plumbing::<impl rustc::ty::context::TyCtxt<'a, 'gcx, 'tcx>>::get_query
  25: rustc::ty::<impl rustc::ty::context::TyCtxt<'a, 'gcx, 'tcx>>::par_body_owners
  26: rustc_typeck::check::typeck_item_bodies
  27: rustc::ty::query::__query_compute::typeck_item_bodies
  28: rustc::ty::query::<impl rustc::ty::query::config::QueryAccessors<'tcx> for rustc::ty::query::queries::typeck_item_bodies<'tcx>>::compute
  29: rustc::dep_graph::graph::DepGraph::with_task_impl
  30: rustc::ty::query::plumbing::<impl rustc::ty::context::TyCtxt<'a, 'gcx, 'tcx>>::get_query
  31: rustc::util::common::time
  32: rustc_typeck::check_crate
  33: rustc_interface::passes::analysis
  34: rustc::ty::query::__query_compute::analysis
  35: rustc::ty::query::<impl rustc::ty::query::config::QueryAccessors<'tcx> for rustc::ty::query::queries::analysis<'tcx>>::compute
  36: rustc::dep_graph::graph::DepGraph::with_task_impl
  37: rustc::ty::query::plumbing::<impl rustc::ty::context::TyCtxt<'a, 'gcx, 'tcx>>::get_query
  38: <std::thread::local::LocalKey<T>>::with
  39: rustc::ty::context::TyCtxt::create_and_enter
  40: rustc_driver::driver::compile_input
  41: rustc_driver::run_compiler_with_pool
  42: <scoped_tls::ScopedKey<T>>::set
  43: rustc_driver::run_compiler
  44: syntax::with_globals
  45: __rust_maybe_catch_panic
             at src/libpanic_unwind/lib.rs:87
  46: <F as alloc::boxed::FnBox<A>>::call_box
  47: std::sys::unix::thread::Thread::new::thread_start
             at /rustc/87a436377a7cddd1d4426c9604c48e0aa2ec0b11/src/liballoc/boxed.rs:759
             at src/libstd/sys_common/thread.rs:14
             at src/libstd/sys/unix/thread.rs:80
  48: start_thread
  49: clone
query stack during panic:
#0 [type_of] processing `main::{{constant}}`
#1 [typeck_tables_of] processing `main::{{constant}}`
#2 [typeck_item_bodies] type-checking all item bodies
#3 [analysis] running analysis passes on this crate
end of query stack
error: aborting due to 5 previous errors

Some errors occurred: E0107, E0433.
For more information about an error, try `rustc --explain E0107`.

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: rustc 1.35.0-nightly (87a436377 2019-03-03) running on x86_64-unknown-linux-gnu

note: compiler flags: -C debuginfo=2 -C incremental --crate-type bin

note: some of the compiler flags provided by cargo are hidden

error: Could not compile `matrixmult`.

Caused by:
  process didn't exit successfully: `rustc --edition=2018 --crate-name matrixmult src/main.rs --color always --crate-type bin --emit=dep-info,link -C debuginfo=2 -C metadata=7ba3d38049e999da -C extra-filename=-7ba3d38049e999da --out-dir /home/wardsegers/matrixmult/target/debug/deps -C incremental=/home/wardsegers/matrixmult/target/debug/incremental -L dependency=/home/wardsegers/matrixmult/target/debug/deps --extern nalgebra=/home/wardsegers/matrixmult/target/debug/deps/libnalgebra-dd81d53f99533f4a.rlib` (exit code: 101)

System information

$ rustc -V
rustc 1.35.0-nightly (87a436377 2019-03-03)

$ cargo -V
cargo 1.34.0-nightly (5c6aa46e6 2019-02-22)

[jonas-schievink]

Duplicate of #58811