Closed
Description
$ RUST_BACKTRACE=full rustc +stage1 src/test/run-pass/associated-const-use-default.rs -Znll -Zborrowck=mir -Ztwo-phase-borrows
error: internal compiler error: unexpected panic
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 1.25.0-dev running on x86_64-unknown-linux-gnu
note: run with `RUST_BACKTRACE=1` for a backtrace
thread 'rustc' panicked at 'assertion failed: identity_substs.is_empty()', librustc_mir/borrow_check/nll/universal_regions.rs:593:17
stack backtrace:
0: 0x7f7de5eb00fb - std::sys::unix::backtrace::tracing::imp::unwind_backtrace::h89e4e024185eb251
at libstd/sys/unix/backtrace/tracing/gcc_s.rs:49
1: 0x7f7de5ec4861 - std::sys_common::backtrace::print::h2c98df9d22a6e204
at libstd/sys_common/backtrace.rs:68
at libstd/sys_common/backtrace.rs:57
2: 0x7f7de5ea5651 - std::panicking::default_hook::{{closure}}::hc4353cdd7897b77b
at libstd/panicking.rs:380
3: 0x7f7de5ea5271 - std::panicking::default_hook::h9bbd1477c233f26c
at libstd/panicking.rs:390
4: 0x7f7de5ea5946 - std::panicking::rust_panic_with_hook::hdfded1d66d2e81cf
at libstd/panicking.rs:576
5: 0x7f7de3b95381 - std::panicking::begin_panic::hd19c2591672191ce
at /home/santiago/src/oss/rust1/src/libstd/panicking.rs:537
6: 0x7f7de39e816e - rustc_mir::borrow_check::nll::universal_regions::UniversalRegions::new::hf70879742af60a25
at librustc_mir/borrow_check/nll/universal_regions.rs:593
at librustc_mir/borrow_check/nll/universal_regions.rs:448
at librustc_mir/borrow_check/nll/universal_regions.rs:215
7: 0x7f7de39c0b1b - rustc_mir::borrow_check::nll::replace_regions_in_mir::haf8b054c38d5b9c9
at librustc_mir/borrow_check/nll/mod.rs:54
8: 0x7f7de39b873e - rustc_mir::borrow_check::do_mir_borrowck::h5527e035bdb6f90b
at librustc_mir/borrow_check/mod.rs:110
9: 0x7f7de3b95bcc - <std::thread::local::LocalKey<T>>::with::h09e3d281217138a6
at librustc_mir/borrow_check/mod.rs:81
at /home/santiago/src/oss/rust1/src/librustc/infer/mod.rs:439
at /home/santiago/src/oss/rust1/src/librustc/ty/context.rs:1573
at /home/santiago/src/oss/rust1/src/libstd/thread/local.rs:377
at /home/santiago/src/oss/rust1/src/libstd/thread/local.rs:288
10: 0x7f7de3989f0a - rustc::ty::context::tls::enter::hf92705338ff04233
at /home/santiago/src/oss/rust1/src/librustc/ty/context.rs:1570
11: 0x7f7de398c66c - rustc::ty::context::GlobalCtxt::enter_local::h834852a1d0d3a09a
at /home/santiago/src/oss/rust1/src/librustc/ty/context.rs:1381
12: 0x7f7de39753f2 - rustc::infer::InferCtxtBuilder::enter::h876297f802958ad2
at /home/santiago/src/oss/rust1/src/librustc/infer/mod.rs:439
13: 0x7f7de39b84ad - rustc_mir::borrow_check::mir_borrowck::ha3ddcadee42ed870
at librustc_mir/borrow_check/mod.rs:79
14: 0x7f7de1918b90 - rustc::ty::maps::<impl rustc::ty::maps::queries::mir_borrowck<'tcx>>::compute_result::hf45a226b5c044941
at librustc/ty/maps/plumbing.rs:383
15: 0x7f7de1563108 - rustc::dep_graph::graph::DepGraph::with_task_impl::h977b285d649164fa
at librustc/dep_graph/graph.rs:289
16: 0x7f7de1535a0f - rustc::dep_graph::graph::DepGraph::with_task::h606c300c86adccb4
at librustc/dep_graph/graph.rs:199
17: 0x7f7de1a62057 - rustc_errors::Handler::track_diagnostics::h5c4733a59e59914c
at librustc/ty/maps/plumbing.rs:492
at /home/santiago/src/oss/rust1/src/librustc_errors/lib.rs:572
18: 0x7f7de17e5ace - rustc::ty::maps::plumbing::<impl rustc::ty::context::TyCtxt<'a, 'gcx, 'tcx>>::cycle_check::h510dda0193aa77a2
at librustc/ty/maps/plumbing.rs:485
at librustc/ty/maps/plumbing.rs:121
19: 0x7f7de1918c92 - rustc::ty::maps::<impl rustc::ty::maps::queries::mir_borrowck<'tcx>>::force::h5b5a43ddd69d4127
at librustc/ty/maps/plumbing.rs:484
20: 0x7f7de1919921 - rustc::ty::maps::<impl rustc::ty::maps::queries::mir_borrowck<'tcx>>::try_get::hb7409412e9075295
at librustc/ty/maps/plumbing.rs:301
at librustc/ty/maps/plumbing.rs:526
21: 0x7f7de186d015 - rustc::ty::maps::TyCtxtAt::mir_borrowck::hb6ba692bbeabd5e9
at librustc/ty/maps/plumbing.rs:565
22: 0x7f7de17b0718 - rustc::ty::maps::<impl rustc::ty::context::TyCtxt<'a, 'tcx, 'lcx>>::mir_borrowck::h44d6f533e09947b5
at librustc/ty/maps/plumbing.rs:558
23: 0x7f7de6238155 - rustc_driver::driver::phase_3_run_analysis_passes::{{closure}}::{{closure}}::h5b4653d0f1e2de53
at librustc_driver/driver.rs:1073
24: 0x7f7de62ff226 - <std::thread::local::LocalKey<T>>::with::h5c65293ff59250fe
at librustc_driver/driver.rs:1071
at /home/santiago/src/oss/rust1/src/librustc/ty/context.rs:1573
at /home/santiago/src/oss/rust1/src/libstd/thread/local.rs:377
at /home/santiago/src/oss/rust1/src/libstd/thread/local.rs:288
25: 0x7f7de621c71e - rustc::ty::context::tls::enter::h88b739b20317ffe4
at /home/santiago/src/oss/rust1/src/librustc/ty/context.rs:1570
26: 0x7f7de62fdcec - <std::thread::local::LocalKey<T>>::with::h43c40e0d4e18765b
at /home/santiago/src/oss/rust1/src/librustc/ty/context.rs:1557
at /home/santiago/src/oss/rust1/src/libstd/thread/local.rs:377
at /home/santiago/src/oss/rust1/src/libstd/thread/local.rs:288
27: 0x7f7de621c1d7 - rustc::ty::context::tls::enter_global::h0e8e2e22f658e325
at /home/santiago/src/oss/rust1/src/librustc/ty/context.rs:1554
28: 0x7f7de6220bf5 - rustc::ty::context::TyCtxt::create_and_enter::h1843d08844146f02
at /home/santiago/src/oss/rust1/src/librustc/ty/context.rs:1197
29: 0x7f7de6265e27 - rustc_driver::driver::phase_3_run_analysis_passes::hdca06791b92b8d71
at librustc_driver/driver.rs:1017
30: 0x7f7de6257c57 - rustc_driver::driver::compile_input::h80b1c15489d523ea
at librustc_driver/driver.rs:220
31: 0x7f7de6249646 - rustc_driver::run_compiler::h6941f27d9cf14ec2
at librustc_driver/lib.rs:248
32: 0x7f7de62f697a - std::sys_common::backtrace::__rust_begin_short_backtrace::h2f40e38beb20488f
at librustc_driver/lib.rs:1305
at librustc_driver/lib.rs:132
at librustc_driver/lib.rs:1212
at /home/santiago/src/oss/rust1/src/libstd/sys_common/backtrace.rs:133
33: 0x7f7de5ed9e76 - __rust_maybe_catch_panic
at libpanic_unwind/lib.rs:102
34: 0x7f7de62d9437 - std::panicking::try::hf10cda8586478214
at /home/santiago/src/oss/rust1/src/libstd/panicking.rs:458
35: 0x7f7de62d927d - std::panic::catch_unwind::h95b8c396b2db40d5
at /home/santiago/src/oss/rust1/src/libstd/panic.rs:358
36: 0x7f7de630b9f3 - <F as alloc::boxed::FnBox<A>>::call_box::h6aa43ee35a088e4c
at /home/santiago/src/oss/rust1/src/libstd/thread/mod.rs:405
at /home/santiago/src/oss/rust1/src/liballoc/boxed.rs:817
37: 0x7f7de5ecc792 - std::sys_common::thread::start_thread::he35a8e58b745ed7d
at libstd/sys_common/thread.rs:24
38: 0x7f7de5ec1408 - std::sys::unix::thread::Thread::new::thread_start::h669389680624d627
at libstd/sys/unix/thread.rs:90
39: 0x7f7ddf71c08b - start_thread
40: 0x7f7de5b6fe1e - __GI___clone
41: 0x0 - <unknown>