Closed
Description
Pyo3 used to compile on 1.30 nightly, but is now failing with an ICE on 1.31
git clone https://github.com/pyo3/pyo3
git checkout b90d45d7e71de4fbb4d48083d64c47ba2735e5c7
cargo build
Compiling pyo3 v0.5.0-alpha.1 (/home/konsti/pyo3)
error: internal compiler error: librustc/traits/specialize/mod.rs:104: When translating substitutions for specialization, the expected specialization failed to hold
thread 'main' panicked at 'Box<Any>', librustc_errors/lib.rs:600:9
stack backtrace:
0: std::sys::unix::backtrace::tracing::imp::unwind_backtrace
at libstd/sys/unix/backtrace/tracing/gcc_s.rs:49
1: std::sys_common::backtrace::print
at libstd/sys_common/backtrace.rs:71
at libstd/sys_common/backtrace.rs:59
2: std::panicking::default_hook::{{closure}}
at libstd/panicking.rs:211
3: std::panicking::default_hook
at libstd/panicking.rs:227
4: rustc::util::common::panic_hook
5: std::panicking::rust_panic_with_hook
at libstd/panicking.rs:480
6: std::panicking::begin_panic
7: rustc_errors::Handler::bug
8: rustc::util::bug::opt_span_bug_fmt::{{closure}}
9: rustc::ty::context::tls::with_opt::{{closure}}
10: rustc::ty::context::tls::with_context_opt
11: rustc::ty::context::tls::with_opt
12: rustc::util::bug::opt_span_bug_fmt
13: rustc::util::bug::bug_fmt
14: rustc::traits::specialize::translate_substs::{{closure}}
15: rustc::traits::specialize::translate_substs
16: rustc::ty::context::tls::with_related_context
17: rustc::infer::InferCtxtBuilder::enter
18: rustc::traits::specialize::find_associated_item
19: rustc::ty::instance::Instance::resolve
20: rustc_mir::lints::check
21: rustc::ty::context::tls::with_related_context
22: rustc::infer::InferCtxtBuilder::enter
23: rustc_mir::build::mir_build
24: rustc_mir::transform::mir_built
25: rustc::ty::query::__query_compute::mir_built
26: rustc::ty::query::<impl rustc::ty::query::config::QueryAccessors<'tcx> for rustc::ty::query::queries::mir_built<'tcx>>::compute
27: rustc::ty::context::tls::with_context
28: rustc::dep_graph::graph::DepGraph::with_task_impl
29: <rustc::ty::query::plumbing::JobOwner<'a, 'tcx, Q>>::start
30: rustc::ty::query::plumbing::<impl rustc::ty::context::TyCtxt<'a, 'gcx, 'tcx>>::force_query_with_job
31: rustc::ty::query::plumbing::<impl rustc::ty::context::TyCtxt<'a, 'gcx, 'tcx>>::get_query
32: rustc::ty::query::<impl rustc::ty::context::TyCtxt<'a, 'tcx, 'lcx>>::mir_built
33: rustc_mir::transform::check_unsafety::unsafety_check_result
34: rustc::ty::query::__query_compute::unsafety_check_result
35: rustc::ty::query::<impl rustc::ty::query::config::QueryAccessors<'tcx> for rustc::ty::query::queries::unsafety_check_result<'tcx>>::compute
36: rustc::ty::context::tls::with_context
37: rustc::dep_graph::graph::DepGraph::with_task_impl
38: <rustc::ty::query::plumbing::JobOwner<'a, 'tcx, Q>>::start
39: rustc::ty::query::plumbing::<impl rustc::ty::context::TyCtxt<'a, 'gcx, 'tcx>>::force_query_with_job
40: rustc::ty::query::plumbing::<impl rustc::ty::context::TyCtxt<'a, 'gcx, 'tcx>>::get_query
41: rustc::ty::query::<impl rustc::ty::context::TyCtxt<'a, 'tcx, 'lcx>>::unsafety_check_result
42: rustc_mir::transform::mir_const
43: rustc::ty::query::__query_compute::mir_const
44: rustc::ty::query::<impl rustc::ty::query::config::QueryAccessors<'tcx> for rustc::ty::query::queries::mir_const<'tcx>>::compute
45: rustc::ty::context::tls::with_context
46: rustc::dep_graph::graph::DepGraph::with_task_impl
47: <rustc::ty::query::plumbing::JobOwner<'a, 'tcx, Q>>::start
48: rustc::ty::query::plumbing::<impl rustc::ty::context::TyCtxt<'a, 'gcx, 'tcx>>::force_query_with_job
49: rustc::ty::query::plumbing::<impl rustc::ty::context::TyCtxt<'a, 'gcx, 'tcx>>::get_query
50: rustc::ty::query::<impl rustc::ty::context::TyCtxt<'a, 'tcx, 'lcx>>::mir_const
51: rustc_mir::transform::mir_validated
52: rustc::ty::query::__query_compute::mir_validated
53: rustc::ty::query::<impl rustc::ty::query::config::QueryAccessors<'tcx> for rustc::ty::query::queries::mir_validated<'tcx>>::compute
54: rustc::ty::context::tls::with_context
55: rustc::dep_graph::graph::DepGraph::with_task_impl
56: <rustc::ty::query::plumbing::JobOwner<'a, 'tcx, Q>>::start
57: rustc::ty::query::plumbing::<impl rustc::ty::context::TyCtxt<'a, 'gcx, 'tcx>>::force_query_with_job
58: rustc::ty::query::plumbing::<impl rustc::ty::context::TyCtxt<'a, 'gcx, 'tcx>>::get_query
59: rustc::ty::query::plumbing::<impl rustc::ty::context::TyCtxt<'a, 'gcx, 'tcx>>::ensure_query
60: rustc_borrowck::borrowck::borrowck
61: rustc::ty::query::<impl rustc::ty::query::config::QueryAccessors<'tcx> for rustc::ty::query::queries::borrowck<'tcx>>::compute
62: rustc::ty::context::tls::with_context
63: rustc::dep_graph::graph::DepGraph::with_task_impl
64: <rustc::ty::query::plumbing::JobOwner<'a, 'tcx, Q>>::start
65: rustc::ty::query::plumbing::<impl rustc::ty::context::TyCtxt<'a, 'gcx, 'tcx>>::force_query_with_job
66: rustc::ty::query::plumbing::<impl rustc::ty::context::TyCtxt<'a, 'gcx, 'tcx>>::get_query
67: rustc::ty::<impl rustc::ty::context::TyCtxt<'a, 'gcx, 'tcx>>::par_body_owners
68: rustc_borrowck::borrowck::check_crate
69: rustc::util::common::time
70: rustc::ty::context::tls::enter_context
71: <std::thread::local::LocalKey<T>>::with
72: rustc::ty::context::TyCtxt::create_and_enter
73: rustc_driver::driver::compile_input
74: rustc_driver::run_compiler_with_pool
75: rustc_driver::driver::spawn_thread_pool
76: rustc_driver::run_compiler
77: <scoped_tls::ScopedKey<T>>::set
78: <std::panic::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once
79: __rust_maybe_catch_panic
at libpanic_unwind/lib.rs:102
80: rustc_driver::run
81: rustc_driver::main
82: std::rt::lang_start::{{closure}}
83: std::panicking::try::do_call
at libstd/rt.rs:59
at libstd/panicking.rs:310
84: __rust_maybe_catch_panic
at libpanic_unwind/lib.rs:102
85: std::rt::lang_start_internal
at libstd/panicking.rs:289
at libstd/panic.rs:392
at libstd/rt.rs:58
86: main
87: __libc_start_main
88: <unknown>
query stack during panic:
#0 [mir_built] processing `freelist::<impl typeob::PyObjectAlloc<T> for T>::dealloc`
#1 [unsafety_check_result] processing `freelist::<impl typeob::PyObjectAlloc<T> for T>::dealloc`
#2 [mir_const] processing `freelist::<impl typeob::PyObjectAlloc<T> for T>::dealloc`
#3 [mir_validated] processing `freelist::<impl typeob::PyObjectAlloc<T> for T>::dealloc`
#4 [borrowck] processing `freelist::<impl typeob::PyObjectAlloc<T> for T>::dealloc`
end of query stack
error: aborting due to previous 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 1.31.0-nightly (4bd4e4130 2018-10-25) running on x86_64-unknown-linux-gnu
note: compiler flags: -C debuginfo=2 -C incremental --crate-type lib
note: some of the compiler flags provided by cargo are hidden
error: Could not compile `pyo3`.
To learn more, run the command again with --verbose.