-

lunch-box. RUST_BACKTRACE=1 rustc issue-27942.rs 
error: internal compiler error: src/librustc_typeck/collect.rs:1123: compute_type_of_item: unexpected item type: ItemTrait(Normal, Generics { lifetimes: [LifetimeDef { lifetime: lifetime(11: 'a), bounds: [], pure_wrt_drop: false }], ty_params: [TyParam { name: R(87), id: NodeId(8), bounds: [TraitTyParamBound(PolyTraitRef { bound_lifetimes: [], trait_ref: TraitRef { path: path(Resources<'a>), ref_id: NodeId(9) }, span: issue-27942.rs:13:25: 13:38 }, None)], default: None, span: issue-27942.rs:13:22: 13:23, pure_wrt_drop: false }], where_clause: WhereClause { id: NodeId(12), predicates: [] }, span: issue-27942.rs:13:17: 13:39 }, [], [TraitItemRef { id: TraitItemId { node_id: NodeId(13) }, name: select(88), kind: Method { has_self: true }, span: issue-27942.rs:17:5: 17:45, defaultness: Default { has_value: false } }])
  --> issue-27942.rs:13:1
   |
13 | / pub trait Buffer<'a, R: Resources<'a>> {
14 | |     //~^ NOTE the lifetime 'a as defined on the trait at 13:1...
15 | |     //~| NOTE ...does not necessarily outlive the lifetime 'a as defined on the trait
16 | |
...  |
25 | |     //~| NOTE the anonymous lifetime #1 defined on the method body at 17:5...
26 | | }
   | |_^

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 1.22.0-dev running on x86_64-unknown-linux-gnu

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

thread 'rustc' panicked at 'Box<Any>', src/librustc_errors/lib.rs:439:8
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.
stack backtrace:
   0: std::sys::imp::backtrace::tracing::imp::unwind_backtrace
             at src/libstd/sys/unix/backtrace/tracing/gcc_s.rs:49
   1: std::sys_common::backtrace::print
             at src/libstd/sys_common/backtrace.rs:71
             at src/libstd/sys_common/backtrace.rs:60
   2: std::panicking::default_hook::{{closure}}
             at src/libstd/panicking.rs:381
   3: std::panicking::default_hook
             at src/libstd/panicking.rs:391
   4: std::panicking::rust_panic_with_hook
             at src/libstd/panicking.rs:577
   5: std::panicking::begin_panic
             at /home/nmatsakis/versioned/rust-2/src/libstd/panicking.rs:538
   6: rustc_errors::Handler::span_bug
             at /home/nmatsakis/versioned/rust-2/<panic macros>:3
   7: rustc::session::opt_span_bug_fmt::{{closure}}
             at /home/nmatsakis/versioned/rust-2/src/librustc/session/mod.rs:883
   8: rustc::session::span_bug_fmt
             at /home/nmatsakis/versioned/rust-2/src/librustc/ty/context.rs:1334
             at /home/nmatsakis/versioned/rust-2/src/librustc/ty/context.rs:1323
             at /home/nmatsakis/versioned/rust-2/src/libstd/thread/local.rs:365
             at /home/nmatsakis/versioned/rust-2/src/libstd/thread/local.rs:279
             at /home/nmatsakis/versioned/rust-2/src/librustc/ty/context.rs:1319
             at /home/nmatsakis/versioned/rust-2/src/librustc/ty/context.rs:1334
             at /home/nmatsakis/versioned/rust-2/src/librustc/session/mod.rs:880
             at /home/nmatsakis/versioned/rust-2/src/librustc/session/mod.rs:873
   9: rustc_typeck::collect::type_of
             at src/librustc_typeck/collect.rs:1123
  10: rustc::ty::maps::<impl rustc::ty::maps::queries::type_of<'tcx>>::try_get_with::{{closure}}::{{closure}}::run_provider
             at src/librustc/ty/maps.rs:721
  11: rustc::dep_graph::graph::DepGraph::with_task
             at src/librustc/dep_graph/graph.rs:132
  12: rustc::ty::maps::<impl rustc::ty::context::TyCtxt<'a, 'gcx, 'tcx>>::cycle_check
             at src/librustc/ty/maps.rs:724
             at /home/nmatsakis/versioned/rust-2/src/librustc_errors/lib.rs:555
             at src/librustc/ty/maps.rs:710
             at src/librustc/ty/maps.rs:282
  13: rustc::ty::maps::<impl rustc::ty::maps::queries::type_of<'tcx>>::try_get
             at src/librustc/ty/maps.rs:707
             at src/librustc/ty/maps.rs:757
  14: rustc::ty::maps::TyCtxtAt::type_of
             at src/librustc/ty/maps.rs:806
  15: rustc::infer::error_reporting::different_lifetimes::<impl rustc::infer::InferCtxt<'a, 'gcx, 'tcx>>::find_anon_type
             at src/librustc/ty/maps.rs:799
             at src/librustc/infer/error_reporting/different_lifetimes.rs:142
  16: rustc::infer::error_reporting::different_lifetimes::<impl rustc::infer::InferCtxt<'a, 'gcx, 'tcx>>::try_report_anon_anon_conflict
             at src/librustc/infer/error_reporting/different_lifetimes.rs:57
  17: rustc::infer::error_reporting::<impl rustc::infer::InferCtxt<'a, 'gcx, 'tcx>>::report_region_errors
             at src/librustc/infer/error_reporting/mod.rs:273
  18: rustc::infer::InferCtxt::resolve_regions_and_report_errors
             at src/librustc/infer/mod.rs:1087
  19: rustc_typeck::check::regionck::<impl rustc_typeck::check::FnCtxt<'a, 'gcx, 'tcx>>::regionck_item
             at src/librustc_typeck/check/regionck.rs:145
  20: rustc::ty::context::tls::enter
             at src/librustc_typeck/check/wfcheck.rs:60
             at src/librustc_typeck/check/mod.rs:599
             at /home/nmatsakis/versioned/rust-2/src/librustc/infer/mod.rs:375
             at /home/nmatsakis/versioned/rust-2/src/librustc/ty/context.rs:1307
             at /home/nmatsakis/versioned/rust-2/src/libstd/thread/local.rs:365
             at /home/nmatsakis/versioned/rust-2/src/libstd/thread/local.rs:279
             at /home/nmatsakis/versioned/rust-2/src/librustc/ty/context.rs:1304
  21: rustc::ty::context::GlobalCtxt::enter_local
             at /home/nmatsakis/versioned/rust-2/src/librustc/ty/context.rs:1118
  22: rustc::infer::InferCtxtBuilder::enter
             at /home/nmatsakis/versioned/rust-2/src/librustc/infer/mod.rs:375
  23: rustc_typeck::check::InheritedBuilder::enter
             at src/librustc_typeck/check/mod.rs:599
  24: rustc_typeck::check::wfcheck::CheckTypeWellFormedVisitor::check_associated_item
             at src/librustc_typeck/check/wfcheck.rs:53
             at src/librustc_typeck/check/wfcheck.rs:163
  25: <rustc_typeck::check::wfcheck::CheckTypeWellFormedVisitor<'a, 'tcx> as rustc::hir::intravisit::Visitor<'v>>::visit_trait_item
             at src/librustc_typeck/check/wfcheck.rs:597
  26: rustc::hir::Crate::visit_all_item_likes
             at /home/nmatsakis/versioned/rust-2/src/librustc/hir/mod.rs:473
  27: rustc_typeck::check::check_wf_new
             at src/librustc_typeck/check/mod.rs:712
             at /home/nmatsakis/versioned/rust-2/src/librustc/session/mod.rs:270
             at src/librustc_typeck/check/mod.rs:710
  28: rustc::util::common::time
             at src/librustc_typeck/lib.rs:318
             at /home/nmatsakis/versioned/rust-2/src/librustc/util/common.rs:119
  29: rustc_typeck::check_crate
             at src/librustc_typeck/lib.rs:318
  30: rustc::ty::context::tls::enter_global
             at src/librustc_driver/driver.rs:1054
             at /home/nmatsakis/versioned/rust-2/src/librustc/ty/context.rs:1307
             at /home/nmatsakis/versioned/rust-2/src/libstd/thread/local.rs:365
             at /home/nmatsakis/versioned/rust-2/src/libstd/thread/local.rs:279
             at /home/nmatsakis/versioned/rust-2/src/librustc/ty/context.rs:1304
             at /home/nmatsakis/versioned/rust-2/src/librustc/ty/context.rs:1291
             at /home/nmatsakis/versioned/rust-2/src/libstd/thread/local.rs:365
             at /home/nmatsakis/versioned/rust-2/src/libstd/thread/local.rs:279
             at /home/nmatsakis/versioned/rust-2/src/librustc/ty/context.rs:1288
  31: rustc_driver::driver::compile_input
             at /home/nmatsakis/versioned/rust-2/src/librustc/ty/context.rs:1066
             at src/librustc_driver/driver.rs:1023
             at src/librustc_driver/driver.rs:202
  32: rustc_driver::run_compiler
             at src/librustc_driver/lib.rs:315