Closed
Description
rustc 1.15.0-nightly (1c44857 2016-11-28)
#![feature(specialization)]
trait Iterate<'a> {
type Ty: Valid;
fn iterate(self);
}
impl<'a, T> Iterate<'a> for T where T: Check {
default type Ty = ();
default fn iterate(self) {}
}
trait Check {}
impl<'a, T> Check for T where <T as Iterate<'a>>::Ty: Valid {}
trait Valid {}
fn main() {
Iterate::iterate(0);
}stack backtrace:
1: 0x7f3f3de302ea - std::sys::imp::backtrace::tracing::imp::write::h944c02ac40aee2d7
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/libstd/sys/unix/backtrace/tracing/gcc_s.rs:42
2: 0x7f3f3de3f1cf - std::panicking::default_hook::{{closure}}::h6875a2976258b020
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/libstd/panicking.rs:247
3: 0x7f3f3de3ed6d - std::panicking::default_hook::h88ffbc5922643264
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/libstd/panicking.rs:257
4: 0x7f3f3de3f677 - std::panicking::rust_panic_with_hook::ha5aed1dfc0e220e3
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/libstd/panicking.rs:451
5: 0x7f3f3b029124 - std::panicking::begin_panic::h5f0a1fd8f4de57ec
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/libstd/panicking.rs:413
6: 0x7f3f3b1ead24 - rustc::traits::project::assemble_candidates_from_impls::{{closure}}::h3d5d2c32c864b919
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc/traits/project.rs:955
7: 0x7f3f3b1e90bc - rustc::traits::project::opt_normalize_projection_type::h914b8e22fe9c1ebf
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc/infer/mod.rs:912
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc/traits/project.rs:879
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc/traits/project.rs:681
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc/traits/project.rs:494
8: 0x7f3f3b1e6eaf - rustc::traits::project::normalize_projection_type::h0e16ed99e5b11d2f
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc/traits/project.rs:379
9: 0x7f3f3b1e68bf - <rustc::traits::project::AssociatedTypeNormalizer<'a, 'b, 'gcx, 'tcx> as rustc::ty::fold::TypeFolder<'gcx, 'tcx>>::fold_ty::h454c95e1a87bd622
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc/traits/project.rs:334
10: 0x7f3f3b21054f - rustc::ty::fold::TypeFolder::fold_substs::h5dcb4dbd1ba6b021
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc/ty/structural_impls.rs:493
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc/ty/subst.rs:113
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc/ty/fold.rs:55
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc/ty/subst.rs:310
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/libcore/ops.rs:2645
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/libcore/option.rs:383
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/libcore/iter/mod.rs:999
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc_data_structures/array_vec.rs:150
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc_data_structures/accumulate_vec.rs:100
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/libcore/iter/iterator.rs:1218
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc/ty/subst.rs:310
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc/ty/fold.rs:153
11: 0x7f3f3b248f4b - rustc::ty::structural_impls::<impl rustc::ty::fold::TypeFoldable<'tcx> for rustc::ty::Predicate<'tcx>>::super_fold_with::h26d22188ecf2d7f4
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc/ty/subst.rs:322
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc/ty/structural_impls.rs:595
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc/ty/fold.rs:55
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc/ty/structural_impls.rs:905
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc/ty/fold.rs:55
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc/ty/structural_impls.rs:414
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc/ty/fold.rs:135
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc/ty/structural_impls.rs:418
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc/ty/structural_impls.rs:807
12: 0x7f3f3b1e6556 - rustc::traits::project::AssociatedTypeNormalizer::fold::h66aa37b808264aaf
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc/ty/fold.rs:55
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc/traits/project.rs:284
13: 0x7f3f3b1fe545 - rustc::traits::select::SelectionContext::impl_or_trait_obligations::{{closure}}::h6f4fef12f6b1f40e
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc/traits/project.rs:246
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc/traits/select.rs:2880
14: 0x7f3f3b09c150 - <core::iter::FlatMap<I, U, F> as core::iter::iterator::Iterator>::next::h325f40ccf3e590d8
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/libcore/ops.rs:2645
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/libcore/option.rs:383
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/libcore/iter/mod.rs:1798
15: 0x7f3f3b025d4c - <collections::vec::Vec<T>>::extend_desugared::hfc70b1ad8e2d3a66
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/libcollections/vec.rs:1654
16: 0x7f3f3b096e23 - <collections::vec::Vec<T> as collections::vec::SpecExtend<I>>::from_iter::h778a3b3cf99a9e59
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/libcollections/vec.rs:1606
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/libcollections/vec.rs:1601
17: 0x7f3f3b1fe249 - rustc::traits::select::SelectionContext::impl_or_trait_obligations::h31bf04e57b3cdff1
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/libcollections/vec.rs:1502
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/libcore/iter/iterator.rs:1218
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc/traits/select.rs:2879
18: 0x7f3f3b1fcd40 - rustc::traits::select::SelectionContext::confirm_impl_candidate::{{closure}}::h3b8d8a8746de3e69
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc/traits/select.rs:2267
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc/traits/select.rs:2245
19: 0x7f3f3b1489c0 - rustc::infer::InferCtxt::in_snapshot::h9c0ef8321adcb209
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc/traits/select.rs:358
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc/infer/mod.rs:901
20: 0x7f3f3b1f85b8 - rustc::traits::select::SelectionContext::confirm_candidate::h49cb93fccbe0728c
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc/traits/select.rs:358
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc/traits/select.rs:2239
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc/traits/select.rs:2020
21: 0x7f3f3b1ef881 - rustc::traits::select::SelectionContext::select::h618d7315c4ae2971
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc/traits/select.rs:420
22: 0x7f3f3b1e1eb4 - <rustc::traits::fulfill::FulfillProcessor<'a, 'b, 'gcx, 'tcx> as rustc_data_structures::obligation_forest::ObligationProcessor>::process_obligation::h5141999bb5161abb
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc/traits/fulfill.rs:466
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc/traits/fulfill.rs:389
23: 0x7f3f3b0885a3 - <rustc_data_structures::obligation_forest::ObligationForest<O>>::process_obligations::h51c057ee4959a407
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc_data_structures/obligation_forest/mod.rs:305
24: 0x7f3f3b1e07d6 - rustc::traits::fulfill::FulfillmentContext::select_where_possible::hf7a547b5ef8a855a
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc/traits/fulfill.rs:340
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc/traits/fulfill.rs:317
25: 0x7f3f3b1dfc05 - rustc::traits::fulfill::FulfillmentContext::select_all_or_error::h9afe37b30124cd4c
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc/traits/fulfill.rs:292
26: 0x7f3f3d0591d0 - rustc_trans::common::fulfill_obligation::{{closure}}::{{closure}}::hf13a4d09f7cbb18e
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc/infer/mod.rs:621
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc_trans/common.rs:989
27: 0x7f3f3d0565b9 - rustc_trans::common::fulfill_obligation::h6bfd7b7f15728b60
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc/infer/mod.rs:440
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc/ty/context.rs:1026
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/libstd/thread/local.rs:245
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc/ty/context.rs:1023
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc/ty/context.rs:860
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc/infer/mod.rs:440
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc_trans/common.rs:949
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc/dep_graph/dep_tracking_map.rs:145
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc_trans/common.rs:943
28: 0x7f3f3d0517b8 - rustc_trans::collector::do_static_dispatch::h9456c98c4201c352
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc_trans/collector.rs:864
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc_trans/collector.rs:829
29: 0x7f3f3d050dea - <rustc_trans::collector::MirNeighborCollector<'a, 'tcx> as rustc::mir::visit::Visitor<'tcx>>::visit_operand::h7428e8287ff72240
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc_trans/collector.rs:575
30: 0x7f3f3d051526 - <rustc_trans::collector::MirNeighborCollector<'a, 'tcx> as rustc::mir::visit::Visitor<'tcx>>::visit_terminator_kind::h8233aed64e4688ea
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc/mir/visit.rs:424
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc_trans/collector.rs:658
31: 0x7f3f3cfdd8a7 - rustc::mir::visit::Visitor::visit_mir::hc23b408d887d8c09
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc/mir/visit.rs:354
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc/mir/visit.rs:123
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc/mir/visit.rs:290
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc/mir/visit.rs:96
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc/mir/visit.rs:256
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc/mir/visit.rs:90
32: 0x7f3f3d04f78c - rustc_trans::collector::collect_items_rec::h9535e33b3068eb29
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc_trans/collector.rs:1223
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc_trans/collector.rs:376
33: 0x7f3f3d039740 - rustc_trans::base::collect_and_partition_translation_items::{{closure}}::h9f2b052ae16b5f0b
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc_trans/collector.rs:285
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc/dep_graph/graph.rs:70
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc_trans/collector.rs:276
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc_trans/base.rs:2023
34: 0x7f3f3d035b3f - rustc_trans::base::collect_and_partition_translation_items::h6a325f48a6efa8c7
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc/util/common.rs:34
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc_trans/base.rs:2022
35: 0x7f3f3d028065 - rustc_trans::base::trans_crate::h6e0b0bf1b66798ce
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc_trans/base.rs:1572
36: 0x7f3f3e1f1fcb - rustc_driver::driver::phase_4_translate_to_llvm::h48ed91c172294403
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc_driver/driver.rs:1037
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc/util/common.rs:34
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc_driver/driver.rs:1035
37: 0x7f3f3e1bdb5f - rustc_driver::driver::compile_input::{{closure}}::hf13172fc4e5a2f4d
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc_driver/driver.rs:207
38: 0x7f3f3e1eb2b8 - rustc_driver::driver::phase_3_run_analysis_passes::{{closure}}::hd97ec26bf3a98036
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc_driver/driver.rs:991
39: 0x7f3f3e1cbc01 - rustc_driver::driver::phase_3_run_analysis_passes::h6d446abb74c09795
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc/ty/context.rs:1026
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/libstd/thread/local.rs:245
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc/ty/context.rs:1023
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc/ty/context.rs:1010
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/libstd/thread/local.rs:245
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc/ty/context.rs:1007
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc/ty/context.rs:797
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc_driver/driver.rs:869
40: 0x7f3f3e1bbad4 - rustc_driver::driver::compile_input::h8e119234b60571d5
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc_driver/driver.rs:174
41: 0x7f3f3e2041b8 - rustc_driver::run_compiler::hbdfc4f84e2e0f4b9
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc_driver/lib.rs:221
42: 0x7f3f3e11f188 - std::panicking::try::do_call::hf679f17bf3b43b0b
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc_driver/lib.rs:1116
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc_driver/lib.rs:137
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/librustc_driver/lib.rs:1050
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/libstd/panic.rs:295
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/libstd/panicking.rs:356
43: 0x7f3f3de49bba - __rust_maybe_catch_panic
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/libpanic_unwind/lib.rs:97
44: 0x7f3f3e141a38 - <F as alloc::boxed::FnBox<A>>::call_box::h506fb5d7b8891cd4
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/libstd/panicking.rs:332
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/libstd/panic.rs:351
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/libstd/thread/mod.rs:287
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/liballoc/boxed.rs:595
45: 0x7f3f3de3e034 - std::sys::imp::thread::Thread::new::thread_start::h8084b1107992ae5b
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/liballoc/boxed.rs:605
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/libstd/sys_common/thread.rs:21
at /buildslave/rust-buildbot/slave/nightly-dist-rustc-linux/build/obj/../src/libstd/sys/unix/thread.rs:84
46: 0x7f3f36051709 - start_thread
47: 0x7f3f3daf882c - clone
48: 0x0 - <unknown>