error: internal compiler error

[llxxbb]

error: internal compiler error: src\librustc_middle\ich\impls_ty.rs:94: StableHasher: unexpected region '_#90r

thread 'rustc' panicked at 'Box', src\librustc_errors\lib.rs:907:9
note: run with RUST_BACKTRACE=1 environment variable to display a backtrace

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 1.45.0-nightly (4bd32c9 2020-05-29) running on x86_64-pc-windows-msvc

note: compiler flags: -C embed-bitcode=no -C debuginfo=2 -C incremental --crate-type lib

note: some of the compiler flags provided by cargo are hidden

error: aborting due to previous error

error: could not compile nature.

[csmoe]

Seems duplicate of #72766
Could you append the backtrace?

[llxxbb]

sorry, I had changed to stable and modified a lot, when change back to nightly, it has gone.

[csmoe]

Okay, thanks for your reporting.
Feel free to reopen if this ice happens again, and don't forget to report with backtrace :)

[llxxbb]

error: internal compiler error: src\librustc_middle\ich\impls_ty.rs:94: StableHasher: unexpected region '_#258r

thread 'rustc' panicked at 'Box', src\librustc_errors\lib.rs:907:9
stack backtrace:
0: <std::sys_common::backtrace::print::DisplayBacktrace as core::fmt::Display>::fmt
1: core::fmt::write
2: <std::io::IoSliceMut as core::fmt::Debug>::fmt
3: std::panicking::take_hook
4: std::panicking::take_hook
5: rustc_driver::report_ice
error: internal compiler error: src\librustc_middle\ich\impls_ty.rs:94: StableHasher: unexpected region '#258r

thread 'rustc' panicked at 'Box', src\librustc_errors\lib.rs:907:9
stack backtrace:
6: std::panicking::rust_panic_with_hook
7: <rustc_errors::json::Diagnostic::from_errors_diagnostic::BufWriter as std::io::Write>::flush
8: rustc_errors::HandlerInner::err_count
9: rustc_errors::Handler::bug
10: rustc_middle::util::bug::bug_fmt
11: rustc_middle::ty::walk::::walk_shallow
12: rustc_middle::ty::walk::::walk_shallow
13: rustc_middle::util::bug::bug_fmt
14: rustc_middle::util::bug::bug_fmt
15: rustc_middle::ich::impls_ty::<impl rustc_data_structures::stable_hasher::HashStable<rustc_middle::ich::hcx::StableHashingContext> for rustc_middle::ty::sty::RegionKind>::hash_stable
16: rustc_middle::ich::impls_syntax::<impl rustc_data_structures::stable_hasher::HashStable<rustc_middle::ich::hcx::StableHashingContext> for [rustc_ast::ast::Attribute]>::hash_stable
17: ZN12rustc_middle2ty3sty107_DERIVE_rustc_data_structures_stable_hasher_HashStable_rustc_middle_ich_StableHashingContext_ctx_FOR_TyKind160_$LT$impl$u20$rustc_data_structures..stable_hasher..HashStable$LT$rustc_middle..ich..hcx..StableHashingContext$GT$$u20$
18: rustc_middle::ich::impls_syntax::<impl rustc_data_structures::stable_hasher::HashStable<rustc_middle::ich::hcx::StableHashingContext> for [rustc_ast::ast::Attribute]>::hash_stable
19: ZN12rustc_middle2ty3sty107_DERIVE_rustc_data_structures_stable_hasher_HashStable_rustc_middle_ich_StableHashingContext_ctx_FOR_TyKind160_$LT$impl$u20$rustc_data_structures..stable_hasher..HashStable$LT$rustc_middle..ich..hcx..StableHashingContext$GT$$u20$
20: <rustc_trait_selection::traits::wf::Elaborate as core::fmt::Debug>::fmt
21: <rustc_trait_selection::traits::util::TraitAliasExpansionInfo as core::fmt::Debug>::fmt
22: <rustc_infer::infer::InferCtxt as rustc_trait_selection::traits::error_reporting::suggestions::InferCtxtExt>::suggest_await_before_try
23: <rustc_infer::infer::InferCtxt as rustc_trait_selection::traits::error_reporting::InferCtxtExt>::report_selection_error
24: <rustc_infer::infer::InferCtxt as rustc_trait_selection::traits::error_reporting::InferCtxtPrivExt>::report_fulfillment_error
25: <rustc_infer::infer::InferCtxt as rustc_trait_selection::traits::error_reporting::InferCtxtExt>::report_fulfillment_errors
26: rustc_typeck::check::FnCtxt::self_type_matches_expected_vid
27: rustc_typeck::check::callee::::check_call
28: rustc_typeck::check::callee::::check_call
29: rustc_typeck::check::expr::::check_expr_with_expectation
30: rustc_typeck::check::expr::::check_expr_with_expectation
31: rustc_typeck::check::_match::::check_match
32: rustc_typeck::check::expr::::check_expr_with_expectation
33: rustc_typeck::check::expr::::check_expr_with_expectation
34: rustc_typeck::check::demand::::check_for_cast
35: rustc_typeck::check::FnCtxt::check_decl_local
36: rustc_typeck::check::FnCtxt::check_stmt
37: rustc_typeck::check::FnCtxt::check_block_no_value
38: rustc_typeck::check::expr::::check_expr_with_expectation
39: rustc_typeck::check::expr::::check_expr_with_expectation
40: rustc_typeck::check::_match::::check_match
41: rustc_typeck::check::expr::::check_expr_with_expectation
42: rustc_typeck::check::expr::::check_expr_with_expectation
43: rustc_typeck::check::FnCtxt::check_block_no_value
44: rustc_typeck::check::expr::::check_expr_with_expectation
45: rustc_typeck::check::expr::::check_expr_with_expectation
46: rustc_typeck::check::expr::::check_expr_with_expectation
47: rustc_typeck::check::expr::::check_expr_with_expectation
48: rustc_typeck::check::FnCtxt::check_block_no_value
49: rustc_typeck::check::expr::::check_expr_with_expectation
50: rustc_typeck::check::expr::::check_expr_with_expectation
51: rustc_typeck::check::expr::::check_expr_with_expectation
52: <rustc_typeck::check::GatherLocalsVisitor as rustc_hir::intravisit::Visitor>::visit_pat
53: rustc_typeck::check::closure::::check_expr_closure
54: rustc_typeck::check::expr::::check_expr_with_expectation
55: rustc_typeck::check::expr::::check_expr_with_expectation
56: rustc_typeck::check::FnCtxt::self_type_matches_expected_vid
57: rustc_typeck::check::callee::::check_call
58: rustc_typeck::check::callee::::check_call
59: rustc_typeck::check::expr::::check_expr_with_expectation
60: rustc_typeck::check::expr::::check_expr_with_expectation
61: rustc_typeck::check::expr::::check_expr_with_expectation
62: <rustc_typeck::check::GatherLocalsVisitor as rustc_hir::intravisit::Visitor>::visit_pat
63: <rustc_typeck::check::op::Op as core::fmt::Debug>::fmt
64: <rustc_typeck::check::fixup_opaque_types::FixupFolder as rustc_middle::ty::fold::TypeFolder>::fold_ty
65: <rustc_mir_build::hair::pattern::check_match::check_legality_of_bindings_in_at_patterns::AtBindingPatternVisitor as rustc_hir::intravisit::Visitor>::visit_pat
66: <rustc_ast::ast::Mutability as rustc_mir_build::hair::cx::expr::ToBorrowKind>::to_borrow_kind
67: <rustc_passes::lib_features::LibFeatureCollector as rustc_hir::intravisit::Visitor>::visit_attribute
68: <rustc_mir_build::build::expr::as_place::PlaceBuilder as core::convert::From<rustc_middle::mir::Local>>::from
69: <rustc_mir_build::hair::pattern::check_match::check_legality_of_bindings_in_at_patterns::AtBindingPatternVisitor as rustc_hir::intravisit::Visitor>::visit_pat
70: <rustc_mir_build::build::ScopeId as core::fmt::Debug>::fmt
71: <rustc_mir_build::build::matches::ArmHasGuard as core::fmt::Debug>::fmt
72: <rustc_mir::transform::check_consts::ops::UnionAccess as core::fmt::Debug>::fmt
73: <rustc_mir::transform::MirSource as core::fmt::Debug>::fmt
74: <rustc_mir::borrow_check::type_check::ObligationAccumulator as core::fmt::Debug>::fmt
75: <rustc_mir::borrow_check::type_check::ObligationAccumulator as core::fmt::Debug>::fmt
76: <rustc_mir::transform::check_unsafety::UnusedUnsafeVisitor as rustc_hir::intravisit::Visitor>::visit_block
77: <rustc_mir::borrow_check::places_conflict::PlaceConflictBias as core::fmt::Debug>::fmt
78: <rustc_mir::transform::MirSource as core::fmt::Debug>::fmt
79: <rustc_mir::borrow_check::type_check::ObligationAccumulator as core::fmt::Debug>::fmt
80: <rustc_mir::borrow_check::type_check::ObligationAccumulator as core::fmt::Debug>::fmt
81: rustc_mir::transform::run_passes
82: <rustc_mir::borrow_check::places_conflict::PlaceConflictBias as core::fmt::Debug>::fmt
83: <rustc_mir::transform::MirSource as core::fmt::Debug>::fmt
84: <rustc_mir::borrow_check::type_check::ObligationAccumulator as core::fmt::Debug>::fmt
85: <rustc_mir::borrow_check::type_check::ObligationAccumulator as core::fmt::Debug>::fmt
86: rustc_mir::transform::run_passes
87: <rustc_mir::interpret::validity::PathElem as core::fmt::Debug>::fmt
88: <rustc_mir::transform::MirSource as core::fmt::Debug>::fmt
89: <rustc_mir::borrow_check::type_check::ObligationAccumulator as core::fmt::Debug>::fmt
90: <rustc_mir::borrow_check::type_check::ObligationAccumulator as core::fmt::Debug>::fmt
91: rustc_mir::borrow_check::provide
92: <rustc_typeck::check::check_opaque_for_inheriting_lifetimes::ProhibitOpaqueVisitor as core::fmt::Debug>::fmt
93: rustc_hir::hir::Body::id
94: <rustc_typeck::outlives::explicit::ExplicitPredicatesMap as core::fmt::Debug>::fmt
95: <rustc_typeck::outlives::explicit::ExplicitPredicatesMap as core::fmt::Debug>::fmt
96: <rustc_typeck::check::method::probe::ProbeScope as core::fmt::Debug>::fmt
97: <rustc_hir::hir_id::HirId as rustc_typeck::check::writeback::Locatable>::to_span
98: rustc_middle::dep_graph::::debug_node
99: rustc_middle::ty::structural_impls::::lift_to_tcx
100: rustc_middle::ty::structural_impls::::lift_to_tcx
note: Some details are omitted, run with RUST_BACKTRACE=full for a verbose backtrace.

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 1.45.0-nightly (4bd32c9 2020-05-29) running on x86_64-pc-windows-msvc

note: compiler flags: -C embed-bitcode=no -C debuginfo=2 -C incremental --crate-type lib

note: some of the compiler flags provided by cargo are hidden

query stack during panic:
#0 [typeck_tables_of] type-checking controller::act_store::duplicated_instance
#1 [mir_built] building MIR for
#2 [unsafety_check_result] unsafety-checking controller::act_store::duplicated_instance
#3 [mir_const] processing controller::act_store::duplicated_instance
#4 [mir_validated] processing controller::act_store::duplicated_instance
#5 [mir_borrowck] borrow-checking controller::act_store::duplicated_instance
#6 [type_of] processing controller::act_store::duplicated_instance::{{opaque}}#0
#7 [check_mod_item_types] checking item types in module rpc::actix
#8 [analysis] running analysis passes on this crate
end of query stack
0: <std::sys_common::backtrace::print::DisplayBacktrace as core::fmt::Display>::fmt
1: core::fmt::write
2: <std::io::IoSliceMut as core::fmt::Debug>::fmt
3: std::panicking::take_hook
4: std::panicking::take_hook
5: rustc_driver::report_ice
6: std::panicking::rust_panic_with_hook
7: <rustc_errors::json::Diagnostic::from_errors_diagnostic::BufWriter as std::io::Write>::flush
8: rustc_errors::HandlerInner::err_count
9: rustc_errors::Handler::bug
10: rustc_middle::util::bug::bug_fmt
11: rustc_middle::ty::walk::::walk_shallow
12: rustc_middle::ty::walk::::walk_shallow
13: rustc_middle::util::bug::bug_fmt
14: rustc_middle::util::bug::bug_fmt
15: rustc_middle::ich::impls_ty::<impl rustc_data_structures::stable_hasher::HashStable<rustc_middle::ich::hcx::StableHashingContext> for rustc_middle::ty::sty::RegionKind>::hash_stable
16: rustc_middle::ich::impls_syntax::<impl rustc_data_structures::stable_hasher::HashStable<rustc_middle::ich::hcx::StableHashingContext> for [rustc_ast::ast::Attribute]>::hash_stable
17: ZN12rustc_middle2ty3sty107_DERIVE_rustc_data_structures_stable_hasher_HashStable_rustc_middle_ich_StableHashingContext_ctx_FOR_TyKind160$LT$impl$u20$rustc_data_structures..stable_hasher..HashStable$LT$rustc_middle..ich..hcx..StableHashingContext$GT$$u20$
18: rustc_middle::ich::impls_syntax::<impl rustc_data_structures::stable_hasher::HashStable<rustc_middle::ich::hcx::StableHashingContext> for [rustc_ast::ast::Attribute]>::hash_stable
19: ZN12rustc_middle2ty3sty107_DERIVE_rustc_data_structures_stable_hasher_HashStable_rustc_middle_ich_StableHashingContext_ctx_FOR_TyKind160_$LT$impl$u20$rustc_data_structures..stable_hasher..HashStable$LT$rustc_middle..ich..hcx..StableHashingContext$GT$$u20$
20: <rustc_trait_selection::traits::wf::Elaborate as core::fmt::Debug>::fmt
21: <rustc_trait_selection::traits::util::TraitAliasExpansionInfo as core::fmt::Debug>::fmt
22: <rustc_infer::infer::InferCtxt as rustc_trait_selection::traits::error_reporting::suggestions::InferCtxtExt>::suggest_await_before_try
23: <rustc_infer::infer::InferCtxt as rustc_trait_selection::traits::error_reporting::InferCtxtExt>::report_selection_error
24: <rustc_infer::infer::InferCtxt as rustc_trait_selection::traits::error_reporting::InferCtxtPrivExt>::report_fulfillment_error
25: <rustc_infer::infer::InferCtxt as rustc_trait_selection::traits::error_reporting::InferCtxtExt>::report_fulfillment_errors
26: rustc_typeck::check::FnCtxt::self_type_matches_expected_vid
27: rustc_typeck::check::callee::::check_call
28: rustc_typeck::check::callee::::check_call
29: rustc_typeck::check::expr::::check_expr_with_expectation
30: rustc_typeck::check::expr::::check_expr_with_expectation
31: rustc_typeck::check::_match::::check_match
32: rustc_typeck::check::expr::::check_expr_with_expectation
33: rustc_typeck::check::expr::::check_expr_with_expectation
34: rustc_typeck::check::demand::::check_for_cast
35: rustc_typeck::check::FnCtxt::check_decl_local
36: rustc_typeck::check::FnCtxt::check_stmt
37: rustc_typeck::check::FnCtxt::check_block_no_value
38: rustc_typeck::check::expr::::check_expr_with_expectation
39: rustc_typeck::check::expr::::check_expr_with_expectation
40: rustc_typeck::check::_match::::check_match
41: rustc_typeck::check::expr::::check_expr_with_expectation
42: rustc_typeck::check::expr::::check_expr_with_expectation
43: rustc_typeck::check::FnCtxt::check_block_no_value
44: rustc_typeck::check::expr::::check_expr_with_expectation
45: rustc_typeck::check::expr::::check_expr_with_expectation
46: rustc_typeck::check::expr::::check_expr_with_expectation
47: rustc_typeck::check::expr::::check_expr_with_expectation
48: rustc_typeck::check::FnCtxt::check_block_no_value
49: rustc_typeck::check::expr::::check_expr_with_expectation
50: rustc_typeck::check::expr::::check_expr_with_expectation
51: rustc_typeck::check::expr::::check_expr_with_expectation
52: <rustc_typeck::check::GatherLocalsVisitor as rustc_hir::intravisit::Visitor>::visit_pat
53: rustc_typeck::check::closure::::check_expr_closure
54: rustc_typeck::check::expr::::check_expr_with_expectation
55: rustc_typeck::check::expr::::check_expr_with_expectation
56: rustc_typeck::check::FnCtxt::self_type_matches_expected_vid
57: rustc_typeck::check::callee::::check_call
58: rustc_typeck::check::callee::::check_call
59: rustc_typeck::check::expr::::check_expr_with_expectation
60: rustc_typeck::check::expr::::check_expr_with_expectation
61: rustc_typeck::check::expr::::check_expr_with_expectation
62: <rustc_typeck::check::GatherLocalsVisitor as rustc_hir::intravisit::Visitor>::visit_pat
63: <rustc_typeck::check::op::Op as core::fmt::Debug>::fmt
64: <rustc_typeck::check::fixup_opaque_types::FixupFolder as rustc_middle::ty::fold::TypeFolder>::fold_ty
65: <rustc_mir_build::hair::pattern::check_match::check_legality_of_bindings_in_at_patterns::AtBindingPatternVisitor as rustc_hir::intravisit::Visitor>::visit_pat
66: <rustc_ast::ast::Mutability as rustc_mir_build::hair::cx::expr::ToBorrowKind>::to_borrow_kind
67: <rustc_passes::lib_features::LibFeatureCollector as rustc_hir::intravisit::Visitor>::visit_attribute
68: <rustc_mir_build::build::expr::as_place::PlaceBuilder as core::convert::From<rustc_middle::mir::Local>>::from
69: <rustc_mir_build::hair::pattern::check_match::check_legality_of_bindings_in_at_patterns::AtBindingPatternVisitor as rustc_hir::intravisit::Visitor>::visit_pat
70: <rustc_mir_build::build::ScopeId as core::fmt::Debug>::fmt
71: <rustc_mir_build::build::matches::ArmHasGuard as core::fmt::Debug>::fmt
72: <rustc_mir::transform::check_consts::ops::UnionAccess as core::fmt::Debug>::fmt
73: <rustc_mir::transform::MirSource as core::fmt::Debug>::fmt
74: <rustc_mir::borrow_check::type_check::ObligationAccumulator as core::fmt::Debug>::fmt
75: <rustc_mir::borrow_check::type_check::ObligationAccumulator as core::fmt::Debug>::fmt
76: <rustc_mir::transform::check_unsafety::UnusedUnsafeVisitor as rustc_hir::intravisit::Visitor>::visit_block
77: <rustc_mir::borrow_check::places_conflict::PlaceConflictBias as core::fmt::Debug>::fmt
78: <rustc_mir::transform::MirSource as core::fmt::Debug>::fmt
79: <rustc_mir::borrow_check::type_check::ObligationAccumulator as core::fmt::Debug>::fmt
80: <rustc_mir::borrow_check::type_check::ObligationAccumulator as core::fmt::Debug>::fmt
81: rustc_mir::transform::run_passes
82: <rustc_mir::borrow_check::places_conflict::PlaceConflictBias as core::fmt::Debug>::fmt
83: <rustc_mir::transform::MirSource as core::fmt::Debug>::fmt
84: <rustc_mir::borrow_check::type_check::ObligationAccumulator as core::fmt::Debug>::fmt
85: <rustc_mir::borrow_check::type_check::ObligationAccumulator as core::fmt::Debug>::fmt
86: rustc_mir::transform::run_passes
87: <rustc_mir::interpret::validity::PathElem as core::fmt::Debug>::fmt
88: <rustc_mir::transform::MirSource as core::fmt::Debug>::fmt
89: <rustc_mir::borrow_check::type_check::ObligationAccumulator as core::fmt::Debug>::fmt
90: <rustc_mir::borrow_check::type_check::ObligationAccumulator as core::fmt::Debug>::fmt
91: rustc_mir::borrow_check::provide
92: <rustc_typeck::check::check_opaque_for_inheriting_lifetimes::ProhibitOpaqueVisitor as core::fmt::Debug>::fmt
93: rustc_hir::hir::Body::id
94: <rustc_typeck::outlives::explicit::ExplicitPredicatesMap as core::fmt::Debug>::fmt
95: <rustc_typeck::outlives::explicit::ExplicitPredicatesMap as core::fmt::Debug>::fmt
96: <rustc_typeck::check::method::probe::ProbeScope as core::fmt::Debug>::fmt
97: <rustc_hir::hir_id::HirId as rustc_typeck::check::writeback::Locatable>::to_span
98: rustc_middle::dep_graph::::debug_node
99: rustc_middle::ty::structural_impls::::lift_to_tcx
100: rustc_middle::ty::structural_impls::::lift_to_tcx
note: Some details are omitted, run with RUST_BACKTRACE=full for a verbose backtrace.

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 1.45.0-nightly (4bd32c9 2020-05-29) running on x86_64-pc-windows-msvc

note: compiler flags: -C embed-bitcode=no -C debuginfo=2 -C incremental

note: some of the compiler flags provided by cargo are hidden

query stack during panic:
#0 [typeck_tables_of] type-checking controller::act_store::duplicated_instance
#1 [mir_built] building MIR for
#2 [unsafety_check_result] unsafety-checking controller::act_store::duplicated_instance
#3 [mir_const] processing controller::act_store::duplicated_instance
#4 [mir_validated] processing controller::act_store::duplicated_instance
#5 [mir_borrowck] borrow-checking controller::act_store::duplicated_instance
#6 [type_of] processing controller::act_store::duplicated_instance::{{opaque}}#0
#7 [check_mod_item_types] checking item types in module rpc::actix
#8 [analysis] running analysis passes on this crate
end of query stack
error: aborting due to previous error; 1 warning emitted

error: could not compile nature.

To learn more, run the command again with --verbose.
warning: build failed, waiting for other jobs to finish...
error: aborting due to previous error; 1 warning emitted

error: build failed

[csmoe]

@llxxbb thanks :)
confirmed, this ice is duplicated of #72766, which has a pending fix.