ICE with 1.40

[agbaroni]

Hello,

this simple code returns an ICE with cargo run:

enum TokenType {
}

#[derive(Clone, Copy)]
struct Position {
    column: u64,
    line: u64
}

struct Token {
    position: Position,
    type_: TokenType,
    value: String
}

fn main() {
}

This is the backtrace:

error: internal compiler error: src/librustc/dep_graph/graph.rs:680: DepNode Hir(nitor_scheme[e747]::Token[0]::value[0]) should have been pre-allocated but wasn't.

thread 'rustc' panicked at 'Box<Any>', src/librustc_errors/lib.rs:931:9
stack backtrace:
   0:     0x7f0695515b24 - backtrace::backtrace::libunwind::trace::h65597d255cb1398b
                               at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.40/src/backtrace/libunwind.rs:88
   1:     0x7f0695515b24 - backtrace::backtrace::trace_unsynchronized::hd4f479d7150ec4a0
                               at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.40/src/backtrace/mod.rs:66
   2:     0x7f0695515b24 - std::sys_common::backtrace::_print_fmt::h015072984a2b172c
                               at src/libstd/sys_common/backtrace.rs:77
   3:     0x7f0695515b24 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h6df05d3335f32194
                               at src/libstd/sys_common/backtrace.rs:61
   4:     0x7f069554e45c - core::fmt::write::h1f444f4312eb6c27
                               at src/libcore/fmt/mod.rs:1028
   5:     0x7f0695509f07 - std::io::Write::write_fmt::h8d147888220078ef
                               at src/libstd/io/mod.rs:1412
   6:     0x7f069551a38e - std::sys_common::backtrace::_print::h8a6df0fa81d6af62
                               at src/libstd/sys_common/backtrace.rs:65
   7:     0x7f069551a38e - std::sys_common::backtrace::print::h6f05b4733407e509
                               at src/libstd/sys_common/backtrace.rs:50
   8:     0x7f069551a38e - std::panicking::default_hook::{{closure}}::h0d0a23bd02315dd8
                               at src/libstd/panicking.rs:188
   9:     0x7f069551a081 - std::panicking::default_hook::h8d15a9aecb4efac6
                               at src/libstd/panicking.rs:205
  10:     0x7f06959fb853 - rustc_driver::report_ice::h604244c68c1c9a3a
  11:     0x7f069551ab60 - std::panicking::rust_panic_with_hook::hbe174577402a475d
                               at src/libstd/panicking.rs:468
  12:     0x7f069788411d - std::panicking::begin_panic::h58bba5e152fa0bee
  13:     0x7f06978b8473 - rustc_errors::HandlerInner::bug::h7438b1481ec83686
  14:     0x7f06978b733a - rustc_errors::Handler::bug::h4011e86e57f14226
  15:     0x7f06971000d3 - rustc::util::bug::opt_span_bug_fmt::{{closure}}::hb274b8a1780df2dc
  16:     0x7f06970fd793 - rustc::ty::context::tls::with_opt::{{closure}}::h7a7e5562232b0149
  17:     0x7f06970fd703 - rustc::ty::context::tls::with_context_opt::h525375971cd1d6ed
  18:     0x7f06970fd747 - rustc::ty::context::tls::with_opt::h3f94bd5c689d4af2
  19:     0x7f06970fffe8 - rustc::util::bug::opt_span_bug_fmt::h5637bf03a92b95d0
  20:     0x7f06970fff52 - rustc::util::bug::bug_fmt::hfb79a0bf2b371fa1
  21:     0x7f06970aa62e - rustc::dep_graph::graph::DepGraph::try_mark_previous_green::h74a25b2962b19d8f
  22:     0x7f06970a9ee1 - rustc::dep_graph::graph::DepGraph::try_mark_green::h783cf10326639eb8
  23:     0x7f06970a9d5d - rustc::dep_graph::graph::DepGraph::try_mark_green_and_read::h088e27bf030f5a81
  24:     0x7f0696102fbd - rustc::ty::query::plumbing::<impl rustc::ty::context::TyCtxt>::get_query::haa291ed7fecfadf5
  25:     0x7f06961b244c - <rustc_typeck::outlives::implicit_infer::InferVisitor as rustc::hir::itemlikevisit::ItemLikeVisitor>::visit_item::h46947760d3b16f49
  26:     0x7f06961cdf09 - rustc::hir::Crate::visit_all_item_likes::hee5ce7b527af9397
  27:     0x7f06961da92f - rustc_typeck::outlives::inferred_outlives_crate::h84380a3c7dac5826
  28:     0x7f0695fe91e5 - rustc::ty::query::__query_compute::inferred_outlives_crate::h32257f22e659aa48
  29:     0x7f06960378ec - rustc::dep_graph::graph::DepGraph::with_task_impl::h57be74ef47de7e30
  30:     0x7f06960c4b0b - rustc::ty::query::plumbing::<impl rustc::ty::context::TyCtxt>::get_query::h0ad054575a564b37
  31:     0x7f06961da4e4 - rustc_typeck::outlives::inferred_outlives_of::h4ecb649ed041f96b
  32:     0x7f0695fe8a5a - rustc::ty::query::__query_compute::inferred_outlives_of::h26400f5a0cd8a817
  33:     0x7f06960b340b - rustc::ty::query::<impl rustc::ty::query::config::QueryAccessors for rustc::ty::query::queries::inferred_outlives_of>::compute::h12dab411960a0d54
  34:     0x7f0696035324 - rustc::dep_graph::graph::DepGraph::with_task_impl::h3eb481da3650be8d
  35:     0x7f06960dc184 - rustc::ty::query::plumbing::<impl rustc::ty::context::TyCtxt>::get_query::h4db42ec3df58ac35
  36:     0x7f06960a4897 - rustc_typeck::collect::predicates_defined_on::h590325cb0b3d7229
  37:     0x7f0695fe8c12 - rustc::ty::query::__query_compute::predicates_defined_on::h67ad5fec3c426f82
  38:     0x7f06960b343c - rustc::ty::query::<impl rustc::ty::query::config::QueryAccessors for rustc::ty::query::queries::predicates_defined_on>::compute::heec42bde4eece152
  39:     0x7f069603a591 - rustc::dep_graph::graph::DepGraph::with_task_impl::h85e1073e233e91a4
  40:     0x7f0696106eff - rustc::ty::query::plumbing::<impl rustc::ty::context::TyCtxt>::get_query::hafc10a5a79999f86
  41:     0x7f06960a4b29 - rustc_typeck::collect::predicates_of::h42293ade3b8b48d1
  42:     0x7f0695fe754f - rustc::ty::query::__query_compute::predicates_of::h2471f2a7bf3fae84
  43:     0x7f06960b310c - rustc::ty::query::<impl rustc::ty::query::config::QueryAccessors for rustc::ty::query::queries::predicates_of>::compute::hfe607691855e423c
  44:     0x7f069603d5a1 - rustc::dep_graph::graph::DepGraph::with_task_impl::hb30b8b10acd5c5ac
  45:     0x7f06960d302d - rustc::ty::query::plumbing::<impl rustc::ty::context::TyCtxt>::get_query::h3e57daecd1133c5f
  46:     0x7f069609bfc0 - <rustc_typeck::collect::CollectItemTypesVisitor as rustc::hir::intravisit::Visitor>::visit_item::h6b6ec407b14bfe3f
  47:     0x7f0696013213 - rustc::hir::map::Map::visit_item_likes_in_module::h4c4aa1fa526963f4
  48:     0x7f069609bc14 - rustc_typeck::collect::collect_mod_item_types::h34811f2e4b252d4a
  49:     0x7f0695fe8eda - rustc::ty::query::__query_compute::collect_mod_item_types::heac1873a1e411c55
  50:     0x7f06960b34bb - rustc::ty::query::<impl rustc::ty::query::config::QueryAccessors for rustc::ty::query::queries::collect_mod_item_types>::compute::h6ca5ef9ca4bcc3cd
  51:     0x7f0696040257 - rustc::dep_graph::graph::DepGraph::with_task_impl::hc5b3fca2a6918254
  52:     0x7f0696111ec0 - rustc::ty::query::plumbing::<impl rustc::ty::context::TyCtxt>::get_query::hd4708da89736dc71
  53:     0x7f06960b3c95 - rustc::ty::query::plumbing::<impl rustc::ty::context::TyCtxt>::ensure_query::hf66c67084d9786e3
  54:     0x7f06961b3059 - rustc_typeck::check_crate::{{closure}}::{{closure}}::ha0485b0a17522e83
  55:     0x7f069619cc86 - rustc::util::common::time::hf116161cfd242531
  56:     0x7f06961dc19d - rustc_typeck::check_crate::hcef2c601ae2b67e5
  57:     0x7f0695adeb04 - rustc_interface::passes::analysis::h77fd894da5badde0
  58:     0x7f0695a69481 - rustc::ty::query::__query_compute::analysis::h39e6fd766157b8c8
  59:     0x7f0695a6bd39 - rustc::dep_graph::graph::DepGraph::with_task_impl::h7d50a3684e7e1a75
  60:     0x7f06959e3f56 - rustc::ty::query::plumbing::<impl rustc::ty::context::TyCtxt>::get_query::h8792deed72f3c814
  61:     0x7f0695a6ea3a - rustc_interface::passes::BoxedGlobalCtxt::access::{{closure}}::h13f9e1b0bf2386ce
  62:     0x7f0695b3092a - rustc_interface::passes::create_global_ctxt::{{closure}}::h3f8b716b6851e054
  63:     0x7f0695a6e78e - rustc_interface::passes::BoxedGlobalCtxt::enter::h710e6729620e7fd4
  64:     0x7f0695a3e7c7 - rustc_interface::interface::run_compiler_in_existing_thread_pool::h0a60318490fa2acb
  65:     0x7f0695a1f112 - std::thread::local::LocalKey<T>::with::h6fe64a0878c37a25
  66:     0x7f0695a1cbce - scoped_tls::ScopedKey<T>::set::h7c068b51568535e7
  67:     0x7f0695a4b264 - syntax::with_globals::heb0c291b2ded5098
  68:     0x7f0695a638d0 - std::sys_common::backtrace::__rust_begin_short_backtrace::h0dd3117452872c48
  69:     0x7f069552b44a - __rust_maybe_catch_panic
                               at src/libpanic_unwind/lib.rs:78
  70:     0x7f0695a64809 - core::ops::function::FnOnce::call_once{{vtable.shim}}::hb67c6244c5ee6f29
  71:     0x7f06954fbe2f - <alloc::boxed::Box<F> as core::ops::function::FnOnce<A>>::call_once::h3534c64212330b0c
                               at /rustc/73528e339aae0f17a15ffa49a8ac608f50c6cf14/src/liballoc/boxed.rs:942
  72:     0x7f0695529e70 - <alloc::boxed::Box<F> as core::ops::function::FnOnce<A>>::call_once::h338c10574a337ece
                               at /rustc/73528e339aae0f17a15ffa49a8ac608f50c6cf14/src/liballoc/boxed.rs:942
  73:     0x7f0695529e70 - std::sys_common::thread::start_thread::h761ac6d57710d65d
                               at src/libstd/sys_common/thread.rs:13
  74:     0x7f0695529e70 - std::sys::unix::thread::Thread::new::thread_start::h61c012ef60f933c0
                               at src/libstd/sys/unix/thread.rs:79
  75:     0x7f06952962de - start_thread
  76:     0x7f0694bba133 - __GI___clone
  77:                0x0 - <unknown>

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 1.40.0 (73528e339 2019-12-16) 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

query stack during panic:
#0 [type_of] processing `Token::value`
#1 [inferred_outlives_crate] computing the inferred outlives predicates for items in this crate
#2 [inferred_outlives_of] processing `TokenType`
#3 [predicates_defined_on] processing `TokenType`
#4 [predicates_of] processing `TokenType`
#5 [collect_mod_item_types] collecting item types in top-level module
#6 [analysis] running analysis passes on this crate
end of query stack
error: aborting due to previous error

[agbaroni]

The ICE is shown only if I add to Cargo.toml the dependency nom = "^5"

[jumbatm]

I'm unable to reproduce this ICE in a new cargo project with `nom = "^5", with the code you specified pasted into main.rs.

Does your project have any other dependencies? Better yet - are you able to push the project up which is causing this ICE?

[jonas-schievink]

This is an incremental compilation bug. There's a reproduction in #69596, so closing in favor of that.