Closed
Description
When using the nightly with the bugfix for the problems with typenum, this error happens when trying to document the nalgebra crate:
note: rustc 1.31.0-nightly (de3d640 2018-10-01) running on x86_64-apple-darwin
Documenting nalgebra v0.16.4 (/Users/bruce/Development/custodian/nalgebra)
error: internal compiler error: librustc/traits/select.rs:2531: Where clause `Binder(<base::default_allocator::DefaultAllocator as base::allocator::Allocator<_, _>>)` was applicable to `Obligation(predicate=Binder(TraitPredicate(<base::default_allocator::DefaultAllocator as base::allocator::Allocator<_, _, _>>)),depth=3)` but now is not
thread '<unnamed>' panicked at 'Box<Any>', librustc_errors/lib.rs:599:9
stack backtrace:
0: std::sys::unix::backtrace::tracing::imp::unwind_backtrace
1: std::sys_common::backtrace::print
2: std::panicking::default_hook::{{closure}}
3: std::panicking::default_hook
4: std::panicking::rust_panic_with_hook
5: std::panicking::begin_panic
6: rustc_errors::Handler::bug
7: rustc::util::bug::opt_span_bug_fmt::{{closure}}
8: rustc::ty::context::tls::with_opt::{{closure}}
9: rustc::ty::context::tls::with_context_opt
10: rustc::ty::context::tls::with_opt
11: rustc::util::bug::opt_span_bug_fmt
12: rustc::util::bug::bug_fmt
13: rustc::traits::select::SelectionContext::confirm_candidate
14: rustc::infer::InferCtxt::probe
15: rustc::traits::select::SelectionContext::evaluate_stack
16: rustc::dep_graph::graph::DepGraph::with_anon_task
17: rustc::traits::select::SelectionContext::evaluate_predicate_recursively
18: rustc::infer::InferCtxt::probe
19: <&'a mut I as core::iter::iterator::Iterator>::next
20: <alloc::vec::Vec<T> as alloc::vec::SpecExtend<T, I>>::from_iter
21: rustc::traits::select::SelectionContext::candidate_from_obligation_no_cache
22: rustc::dep_graph::graph::DepGraph::with_anon_task
23: rustc::traits::select::SelectionContext::candidate_from_obligation
24: rustc::traits::select::SelectionContext::evaluate_stack
25: rustc::dep_graph::graph::DepGraph::with_anon_task
26: rustc::traits::select::SelectionContext::evaluate_predicate_recursively
27: rustc::infer::InferCtxt::probe
28: rustc::traits::select::SelectionContext::evaluate_stack
29: rustc::dep_graph::graph::DepGraph::with_anon_task
30: rustc::traits::select::SelectionContext::evaluate_predicate_recursively
31: rustc::infer::InferCtxt::probe
32: rustc::traits::select::SelectionContext::evaluate_stack
33: rustc::dep_graph::graph::DepGraph::with_anon_task
34: rustc::traits::select::SelectionContext::evaluate_predicate_recursively
35: rustc::traits::select::SelectionContext::evaluate_obligation_recursively
36: rustc::ty::context::tls::with_related_context
37: rustc::infer::InferCtxtBuilder::enter
38: rustc_traits::evaluate_obligation::evaluate_obligation
39: rustc::ty::query::__query_compute::evaluate_obligation
40: rustc::ty::query::<impl rustc::ty::query::config::QueryAccessors<'tcx> for rustc::ty::query::queries::evaluate_obligation<'tcx>>::compute
41: rustc::dep_graph::graph::DepGraph::with_task_impl
42: rustc::ty::context::tls::with_related_context
43: rustc::ty::query::plumbing::<impl rustc::ty::context::TyCtxt<'a, 'gcx, 'tcx>>::force_query_with_job
44: rustc::ty::query::plumbing::<impl rustc::ty::context::TyCtxt<'a, 'gcx, 'tcx>>::get_query
45: rustc::traits::query::evaluate_obligation::<impl rustc::infer::InferCtxt<'cx, 'gcx, 'tcx>>::evaluate_obligation
46: rustc::ty::context::tls::with_context::{{closure}}
47: rustdoc::clean::blanket_impl::BlanketImplFinder::get_blanket_impls::{{closure}}
48: rustc::ty::trait_def::<impl rustc::ty::context::TyCtxt<'a, 'gcx, 'tcx>>::for_each_relevant_impl
49: rustdoc::clean::blanket_impl::BlanketImplFinder::get_blanket_impls
50: rustdoc::clean::def_ctor::get_def_from_node_id
51: <rustdoc::passes::collect_trait_impls::SyntheticImplCollector<'a, 'tcx, 'rcx, 'cstore> as rustdoc::fold::DocFolder>::fold_item
52: <alloc::vec::Vec<T> as alloc::vec::SpecExtend<T, I>>::from_iter
53: <alloc::vec::Vec<T> as alloc::vec::SpecExtend<T, I>>::from_iter
54: rustdoc::fold::DocFolder::fold_inner_recur
55: <rustdoc::passes::collect_trait_impls::SyntheticImplCollector<'a, 'tcx, 'rcx, 'cstore> as rustdoc::fold::DocFolder>::fold_item
56: <alloc::vec::Vec<T> as alloc::vec::SpecExtend<T, I>>::from_iter
57: <alloc::vec::Vec<T> as alloc::vec::SpecExtend<T, I>>::from_iter
58: rustdoc::fold::DocFolder::fold_inner_recur
59: <rustdoc::passes::collect_trait_impls::SyntheticImplCollector<'a, 'tcx, 'rcx, 'cstore> as rustdoc::fold::DocFolder>::fold_item
60: rustdoc::passes::collect_trait_impls::collect_trait_impls
61: rustdoc::core::run_core::{{closure}}::{{closure}}
62: rustc::ty::context::tls::enter_context
63: <std::thread::local::LocalKey<T>>::with
64: rustc::ty::context::TyCtxt::create_and_enter
65: rustc_driver::driver::phase_3_run_analysis_passes
66: <scoped_tls::ScopedKey<T>>::set
67: rustdoc::core::run_core
68: <scoped_tls::ScopedKey<T>>::set
69: syntax::with_globals
70: <std::panic::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once
71: std::panicking::try::do_call
72: __rust_maybe_catch_panic
73: rustc_driver::monitor
74: rustdoc::rust_input
75: rustdoc::main_args
76: <scoped_tls::ScopedKey<T>>::set
77: syntax::with_globals
78: std::panicking::try::do_call
79: __rust_maybe_catch_panic
80: <F as alloc::boxed::FnBox<A>>::call_box
81: std::sys_common::thread::start_thread
82: std::sys::unix::thread::Thread::new::thread_start
83: _pthread_body
84: _pthread_start