rust-lang/rust#43021 backtrace

backtrace

   Compiling flossy v0.0.1 (file:///Users/eliza/Development/flossy)
error: internal compiler error: src/librustc_typeck/check/mod.rs:613: escaping regions in predicate Obligation(predicate=Binder(ProjectionPredicate(ProjectionTy { trait_ref: <_ as futures::Future>, item_def_id: DefId { krate: CrateNum(11), node: DefIndex(318) => futures/620ce4c::future[0]::Future[0]::Item[0] } }, upstream::Status<'_>)),depth=0)
  --> src/upstream/mod.rs:29:13
   |
29 |          -> impl Future<Item=Status, Error=Error>
   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

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 1.19.0-nightly (78d8416ca 2017-06-17) running on x86_64-apple-darwin

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

thread 'rustc' panicked at 'Box<Any>', src/librustc_errors/lib.rs:428
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
   1: std::panicking::default_hook::{{closure}}
   2: std::panicking::default_hook
   3: std::panicking::rust_panic_with_hook
   4: std::panicking::begin_panic
   5: rustc_errors::Handler::span_bug
   6: rustc::session::opt_span_bug_fmt::{{closure}}
   7: rustc::session::span_bug_fmt
   8: rustc_typeck::check::Inherited::register_predicate
   9: <rustc::ty::fold::BottomUpFolder<'a, 'gcx, 'tcx, F> as rustc::ty::fold::TypeFolder<'gcx, 'tcx>>::fold_ty
  10: rustc_typeck::check::check_fn
  11: rustc_typeck::check::typeck_tables_of::{{closure}}
  12: rustc_typeck::check::typeck_tables_of
  13: rustc::ty::maps::<impl rustc::ty::maps::queries::typeck_tables_of<'tcx>>::try_get
  14: rustc::ty::maps::TyCtxtAt::typeck_tables_of
  15: rustc::ty::maps::<impl rustc::ty::context::TyCtxt<'a, 'tcx, 'lcx>>::typeck_tables_of
  16: rustc_typeck::check::typeck_item_bodies
  17: rustc::ty::maps::<impl rustc::ty::maps::queries::typeck_item_bodies<'tcx>>::try_get
  18: rustc::ty::maps::TyCtxtAt::typeck_item_bodies
  19: rustc::ty::maps::<impl rustc::ty::context::TyCtxt<'a, 'tcx, 'lcx>>::typeck_item_bodies
  20: rustc_typeck::check_crate
  21: rustc_driver::driver::phase_3_run_analysis_passes::{{closure}}
  22: rustc_driver::driver::phase_3_run_analysis_passes
  23: rustc_driver::driver::compile_input
  24: rustc_driver::run_compiler

error: Could not compile `flossy`.

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