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drop(self); in fn ... (self) causes a compiler crash (nightly) #95022

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@griffi-gh

Description

@griffi-gh

Code

    ...
    pub fn build(self) -> Result<Gameboy, Box<dyn std::error::Error + 'static>> {
        let gb = self.gb;
        let err = self.err;
        drop(self); // <- This line causes the compiler to crash
        match err {
            Some(err) => Err(err),
            None => Ok(gb)
        }
    }
    ...

Meta

rustc --version --verbose:

rustc 1.61.0-nightly (9fcbc3205 2022-03-04)
binary: rustc
commit-hash: 9fcbc32053d5084d1de79bd484de82474cdae427
commit-date: 2022-03-04
host: x86_64-unknown-linux-gnu
release: 1.61.0-nightly
LLVM version: 14.0.0

Error output

user@pop-os:~/Projects/rustish$ cargo build
Compiling rustish-gb v0.1.0 (/home/user/Projects/rustish)
thread 'rustc' panicked at 'index out of bounds: the len is 0 but the index is 3', compiler/rustc_infer/src/infer/region_constraints/mod.rs:446:9
stack backtrace:
0:     0x7f196dee8c8c - std::backtrace_rs::backtrace::libunwind::trace::h85a99825553c3ef4
at /rustc/9fcbc32053d5084d1de79bd484de82474cdae427/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
1:     0x7f196dee8c8c - std::backtrace_rs::backtrace::trace_unsynchronized::h2fe1724be12667bf
at /rustc/9fcbc32053d5084d1de79bd484de82474cdae427/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
2:     0x7f196dee8c8c - std::sys_common::backtrace::_print_fmt::h85a73c46be7af254
at /rustc/9fcbc32053d5084d1de79bd484de82474cdae427/library/std/src/sys_common/backtrace.rs:66:5
3:     0x7f196dee8c8c - <std::sys_common::backtrace::_print::DisplayBacktraceas core::fmt::Display>::fmt::h30c32953deafcc5b
at /rustc/9fcbc32053d5084d1de79bd484de82474cdae427/library/std/src/sys_common/backtrace.rs:45:22
4:     0x7f196df42b6c - core::fmt::write::h3b71aa0cf071dab4
at /rustc/9fcbc32053d5084d1de79bd484de82474cdae427/library/core/src/fmt/mod.rs:1190:17
5:     0x7f196ded96c1 - std::io::Write::write_fmt::h98b6680dca3ce26b
at /rustc/9fcbc32053d5084d1de79bd484de82474cdae427/library/std/src/io/mod.rs:1655:15
6:     0x7f196deebbb5 - std::sys_common::backtrace::_print::h37d2ec65c4aca279
at /rustc/9fcbc32053d5084d1de79bd484de82474cdae427/library/std/src/sys_common/backtrace.rs:48:5
7:     0x7f196deebbb5 - std::sys_common::backtrace::print::h5e60ceeb42a6eb64
at /rustc/9fcbc32053d5084d1de79bd484de82474cdae427/library/std/src/sys_common/backtrace.rs:35:9
8:     0x7f196deebbb5 - std::panicking::default_hook::{{closure}}::h8fc16f5ef2371077
at /rustc/9fcbc32053d5084d1de79bd484de82474cdae427/library/std/src/panicking.rs:295:22
9:     0x7f196deeb864 - std::panicking::default_hook::h9bdf436c14e69687
at /rustc/9fcbc32053d5084d1de79bd484de82474cdae427/library/std/src/panicking.rs:314:9
10:     0x7f196e680601 - rustc_driver[253633c1b73202d4]::DEFAULT_HOOK::{closure#0}::{closure#0}
11:     0x7f195f5e7763 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hce7a094751399747
at /rustc/9fcbc32053d5084d1de79bd484de82474cdae427/library/alloc/src/boxed.rs:1868:9
12:     0x7f195f5dfa1c - proc_macro::bridge::client::<impl proc_macro::bridge::Bridge>::enter::{{closure}}::{{closure}}::hc935da45780f8b59
at /rustc/9fcbc32053d5084d1de79bd484de82474cdae427/library/proc_macro/src/bridge/client.rs:319:21
13:     0x7f195f5f4230 - std::panicking::update_hook::{{closure}}::h72d2c509781ff4cf
at /rustc/9fcbc32053d5084d1de79bd484de82474cdae427/library/std/src/panicking.rs:258:41
14:     0x7f196deec43f - std::panicking::rust_panic_with_hook::ha3982850844dea9d
at /rustc/9fcbc32053d5084d1de79bd484de82474cdae427/library/std/src/panicking.rs:702:17
15:     0x7f196deec127 - std::panicking::begin_panic_handler::{{closure}}::hc30769891553329e
at /rustc/9fcbc32053d5084d1de79bd484de82474cdae427/library/std/src/panicking.rs:588:13
16:     0x7f196dee9144 - std::sys_common::backtrace::__rust_end_short_backtrace::hc45a6a8e93dc3d76
at /rustc/9fcbc32053d5084d1de79bd484de82474cdae427/library/std/src/sys_common/backtrace.rs:138:18
17:     0x7f196deebe59 - rust_begin_unwind
at /rustc/9fcbc32053d5084d1de79bd484de82474cdae427/library/std/src/panicking.rs:584:5
18:     0x7f196deafa13 - core::panicking::panic_fmt::h091108b0e7b1d766
at /rustc/9fcbc32053d5084d1de79bd484de82474cdae427/library/core/src/panicking.rs:143:14
19:     0x7f196deaf952 - core::panicking::panic_bounds_check::h9d998c19ad28f413
at /rustc/9fcbc32053d5084d1de79bd484de82474cdae427/library/core/src/panicking.rs:84:5
20:     0x7f197033e2d0 - <rustc_middle[b5c8afc8c545842e]::ty::sty::Region as rustc_middle[b5c8afc8c545842e]::ty::relate::Relate>::relate::<rustc_infer[ed5ed88bea1f1a11]::infer::combine::Generalizer>
21:     0x7f19702ede04 - rustc_middle[b5c8afc8c545842e]::ty::relate::super_relate_tys::<rustc_infer[ed5ed88bea1f1a11]::infer::combine::Generalizer>
22:     0x7f19702e752b - <rustc_infer[ed5ed88bea1f1a11]::infer::combine::Generalizer as rustc_middle[b5c8afc8c545842e]::ty::relate::TypeRelation>::tys
23:     0x7f19702ec4dd - rustc_middle[b5c8afc8c545842e]::ty::relate::super_relate_tys::<rustc_infer[ed5ed88bea1f1a11]::infer::combine::Generalizer>
24:     0x7f19702e752b - <rustc_infer[ed5ed88bea1f1a11]::infer::combine::Generalizer as rustc_middle[b5c8afc8c545842e]::ty::relate::TypeRelation>::tys
25:     0x7f19702e01b4 - <rustc_infer[ed5ed88bea1f1a11]::infer::combine::CombineFields>::instantiate
26:     0x7f196f5681ea - <rustc_infer[ed5ed88bea1f1a11]::infer::equate::Equateas rustc_middle[b5c8afc8c545842e]::ty::relate::TypeRelation>::relate_with_variance::<rustc_middle[b5c8afc8c545842e]::ty::subst::GenericArg>
27:     0x7f196f528f3a - <&mut rustc_middle[b5c8afc8c545842e]::ty::relate::relate_substs<rustc_infer[ed5ed88bea1f1a11]::infer::equate::Equate>::{closure#0} ascore[b57089ad9157542c]::ops::function::FnOnce<((usize, (rustc_middle[b5c8afc8c545842e]::ty::subst::GenericArg, rustc_middle[b5c8afc8c545842e]::ty::subst::GenericArg)),)>>::call_once
28:     0x7f197032ff21 - <rustc_infer[ed5ed88bea1f1a11]::infer::equate::Equateas rustc_middle[b5c8afc8c545842e]::ty::relate::TypeRelation>::relate_item_substs
29:     0x7f196f52411e - rustc_middle[b5c8afc8c545842e]::ty::relate::super_relate_tys::<rustc_infer[ed5ed88bea1f1a11]::infer::equate::Equate>
30:     0x7f1970331239 - <rustc_infer[ed5ed88bea1f1a11]::infer::equate::Equateas rustc_middle[b5c8afc8c545842e]::ty::relate::TypeRelation>::tys
31:     0x7f1970233193 - <rustc_trait_selection[8f5b3efcfe8fa220]::traits::select::SelectionContext>::rematch_impl
32:     0x7f197023a04d - <rustc_trait_selection[8f5b3efcfe8fa220]::traits::select::SelectionContext>::confirm_candidate
33:     0x7f19702429d6 - <rustc_trait_selection[8f5b3efcfe8fa220]::traits::select::SelectionContext>::select
34:     0x7f1970280fcf - <rustc_trait_selection[8f5b3efcfe8fa220]::traits::fulfill::FulfillProcessor>::process_changed_obligations
35:     0x7f197029181e - <rustc_data_structures[987fc78f4ea6f575]::obligation_forest::ObligationForest<rustc_trait_selection[8f5b3efcfe8fa220]::traits::fulfill::PendingPredicateObligation>>::process_obligations::<rustc_trait_selection[8f5b3efcfe8fa220]::traits::fulfill::FulfillProcessor, rustc_data_structures[987fc78f4ea6f575]::obligation_forest::Outcome<rustc_trait_selection[8f5b3efcfe8fa220]::traits::fulfill::PendingPredicateObligation, rustc_infer[ed5ed88bea1f1a11]::traits::FulfillmentErrorCode>>
36:     0x7f19702808bf - <rustc_trait_selection[8f5b3efcfe8fa220]::traits::fulfill::FulfillmentContext as rustc_infer[ed5ed88bea1f1a11]::traits::engine::TraitEngine>::select_where_possible
37:     0x7f196ec3643e - <rustc_infer[ed5ed88bea1f1a11]::infer::InferCtxtBuilder>::enter::<core[b57089ad9157542c]::result::Result<alloc[16c9bdc92ac74255]::vec::Vec<(&rustc_middle[b5c8afc8c545842e]::ty::generics::GenericParamDef, alloc[16c9bdc92ac74255]::string::String)>, ()>, <rustc_borrowck[89cfb880cbe825ee]::MirBorrowckCtxt>::report_use_of_moved_or_uninitialized::{closure#10}>
38:     0x7f196ec6d830 - <rustc_borrowck[89cfb880cbe825ee]::MirBorrowckCtxt>::report_use_of_moved_or_uninitialized
39:     0x7f196ec8530d - <rustc_borrowck[89cfb880cbe825ee]::MirBorrowckCtxt asrustc_mir_dataflow[1118a44e2e3e2a6c]::framework::visitor::ResultsVisitor>::visit_statement_before_primary_effect
40:     0x7f196fd0ab23 - rustc_mir_dataflow[1118a44e2e3e2a6c]::framework::visitor::visit_results::<rustc_borrowck[89cfb880cbe825ee]::dataflow::BorrowckAnalyses<rustc_index[883f35d451eaea8e]::bit_set::BitSet<rustc_borrowck[89cfb880cbe825ee]::dataflow::BorrowIndex>, rustc_index[883f35d451eaea8e]::bit_set::ChunkedBitSet<rustc_mir_dataflow[1118a44e2e3e2a6c]::move_paths::MovePathIndex>, rustc_index[883f35d451eaea8e]::bit_set::ChunkedBitSet<rustc_mir_dataflow[1118a44e2e3e2a6c]::move_paths::InitIndex>>, rustc_borrowck[89cfb880cbe825ee]::dataflow::BorrowckAnalyses<rustc_mir_dataflow[1118a44e2e3e2a6c]::framework::engine::Results<rustc_borrowck[89cfb880cbe825ee]::dataflow::Borrows>, rustc_mir_dataflow[1118a44e2e3e2a6c]::framework::engine::Results<rustc_mir_dataflow[1118a44e2e3e2a6c]::impls::MaybeUninitializedPlaces>, rustc_mir_dataflow[1118a44e2e3e2a6c]::framework::engine::Results<rustc_mir_dataflow[1118a44e2e3e2a6c]::impls::EverInitializedPlaces>>, core[b57089ad9157542c]::iter::adapters::map::Map<rustc_middle[b5c8afc8c545842e]::mir::traversal::ReversePostorder, rustc_borrowck[89cfb880cbe825ee]::do_mir_borrowck::{closure#2}>, rustc_borrowck[89cfb880cbe825ee]::MirBorrowckCtxt>
41:     0x7f196fda2ac7 - rustc_borrowck[89cfb880cbe825ee]::do_mir_borrowck
42:     0x7f196fd96b2e - rustc_borrowck[89cfb880cbe825ee]::mir_borrowck
43:     0x7f196fd936d0 - <rustc_borrowck[89cfb880cbe825ee]::provide::{closure#0} as core[b57089ad9157542c]::ops::function::FnOnce<(rustc_middle[b5c8afc8c545842e]::ty::context::TyCtxt, rustc_span[27f869f84b8424c3]::def_id::LocalDefId)>>::call_once
44:     0x7f1970a48372 - <rustc_query_system[f1c75ba6d27283a1]::dep_graph::graph::DepGraph<rustc_middle[b5c8afc8c545842e]::dep_graph::dep_node::DepKind>>::with_task::<rustc_middle[b5c8afc8c545842e]::ty::context::TyCtxt, rustc_span[27f869f84b8424c3]::def_id::LocalDefId, &rustc_middle[b5c8afc8c545842e]::mir::query::BorrowCheckResult>
45:     0x7f196ff394f1 - rustc_query_system[f1c75ba6d27283a1]::query::plumbing::try_execute_query::<rustc_query_impl[545fe5bd5d961cd1]::plumbing::QueryCtxt, rustc_query_system[f1c75ba6d27283a1]::query::caches::DefaultCache<rustc_span[27f869f84b8424c3]::def_id::LocalDefId, &rustc_middle[b5c8afc8c545842e]::mir::query::BorrowCheckResult>>
46:     0x7f197001b35a - <rustc_query_impl[545fe5bd5d961cd1]::Queries as rustc_middle[b5c8afc8c545842e]::ty::query::QueryEngine>::mir_borrowck
47:     0x7f196f88cb88 - <rustc_middle[b5c8afc8c545842e]::hir::map::Map>::par_body_owners::<rustc_interface[8e34a951fb175e92]::passes::analysis::{closure#2}::{closure#0}>
48:     0x7f1970514098 - <rustc_session[9898eee89ca36b86]::session::Session>::time::<(), rustc_interface[8e34a951fb175e92]::passes::analysis::{closure#2}>
49:     0x7f19704ffbf5 - rustc_interface[8e34a951fb175e92]::passes::analysis
50:     0x7f1970a61ec4 - <rustc_query_system[f1c75ba6d27283a1]::dep_graph::graph::DepGraph<rustc_middle[b5c8afc8c545842e]::dep_graph::dep_node::DepKind>>::with_task::<rustc_middle[b5c8afc8c545842e]::ty::context::TyCtxt, (), core[b57089ad9157542c]::result::Result<(), rustc_errors[8f52deac729bd09c]::ErrorGuaranteed>>
51:     0x7f19709abacf - rustc_query_system[f1c75ba6d27283a1]::query::plumbing::try_execute_query::<rustc_query_impl[545fe5bd5d961cd1]::plumbing::QueryCtxt, rustc_query_system[f1c75ba6d27283a1]::query::caches::DefaultCache<(), core[b57089ad9157542c]::result::Result<(), rustc_errors[8f52deac729bd09c]::ErrorGuaranteed>>>
52:     0x7f19709eadae - rustc_query_system[f1c75ba6d27283a1]::query::plumbing::get_query::<rustc_query_impl[545fe5bd5d961cd1]::queries::analysis, rustc_query_impl[545fe5bd5d961cd1]::plumbing::QueryCtxt>
53:     0x7f19704ddaa4 - <rustc_interface[8e34a951fb175e92]::passes::QueryContext>::enter::<rustc_driver[253633c1b73202d4]::run_compiler::{closure#1}::{closure#2}::{closure#3}, core[b57089ad9157542c]::result::Result<(), rustc_errors[8f52deac729bd09c]::ErrorGuaranteed>>
54:     0x7f19704bb40a - <rustc_interface[8e34a951fb175e92]::interface::Compiler>::enter::<rustc_driver[253633c1b73202d4]::run_compiler::{closure#1}::{closure#2}, core[b57089ad9157542c]::result::Result<core[b57089ad9157542c]::option::Option<rustc_interface[8e34a951fb175e92]::queries::Linker>, rustc_errors[8f52deac729bd09c]::ErrorGuaranteed>>
55:     0x7f19704ce27d - rustc_span[27f869f84b8424c3]::with_source_map::<core[b57089ad9157542c]::result::Result<(), rustc_errors[8f52deac729bd09c]::ErrorGuaranteed>, rustc_interface[8e34a951fb175e92]::interface::create_compiler_and_run<core[b57089ad9157542c]::result::Result<(), rustc_errors[8f52deac729bd09c]::ErrorGuaranteed>, rustc_driver[253633c1b73202d4]::run_compiler::{closure#1}>::{closure#1}>
56:     0x7f19704bc3b0 - rustc_interface[8e34a951fb175e92]::interface::create_compiler_and_run::<core[b57089ad9157542c]::result::Result<(), rustc_errors[8f52deac729bd09c]::ErrorGuaranteed>, rustc_driver[253633c1b73202d4]::run_compiler::{closure#1}>
57:     0x7f19704ba322 - <scoped_tls[c69d22638ea3d4d4]::ScopedKey<rustc_span[27f869f84b8424c3]::SessionGlobals>>::set::<rustc_interface[8e34a951fb175e92]::interface::run_compiler<core[b57089ad9157542c]::result::Result<(), rustc_errors[8f52deac729bd09c]::ErrorGuaranteed>, rustc_driver[253633c1b73202d4]::run_compiler::{closure#1}>::{closure#0}, core[b57089ad9157542c]::result::Result<(), rustc_errors[8f52deac729bd09c]::ErrorGuaranteed>>
58:     0x7f19704b85fd - std[7f7de7bb0dc2c2d9]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[8e34a951fb175e92]::util::run_in_thread_pool_with_globals<rustc_interface[8e34a951fb175e92]::interface::run_compiler<core[b57089ad9157542c]::result::Result<(), rustc_errors[8f52deac729bd09c]::ErrorGuaranteed>, rustc_driver[253633c1b73202d4]::run_compiler::{closure#1}>::{closure#0}, core[b57089ad9157542c]::result::Result<(), rustc_errors[8f52deac729bd09c]::ErrorGuaranteed>>::{closure#0}, core[b57089ad9157542c]::result::Result<(), rustc_errors[8f52deac729bd09c]::ErrorGuaranteed>>
59:     0x7f19704b88f9 - <<std[7f7de7bb0dc2c2d9]::thread::Builder>::spawn_unchecked_<rustc_interface[8e34a951fb175e92]::util::run_in_thread_pool_with_globals<rustc_interface[8e34a951fb175e92]::interface::run_compiler<core[b57089ad9157542c]::result::Result<(), rustc_errors[8f52deac729bd09c]::ErrorGuaranteed>, rustc_driver[253633c1b73202d4]::run_compiler::{closure#1}>::{closure#0}, core[b57089ad9157542c]::result::Result<(), rustc_errors[8f52deac729bd09c]::ErrorGuaranteed>>::{closure#0}, core[b57089ad9157542c]::result::Result<(), rustc_errors[8f52deac729bd09c]::ErrorGuaranteed>>::{closure#1} as core[b57089ad9157542c]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
60:     0x7f196def6843 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h87c94dc77f5f15da
at /rustc/9fcbc32053d5084d1de79bd484de82474cdae427/library/alloc/src/boxed.rs:1854:9
61:     0x7f196def6843 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h08d1e7d9bef4fe96
at /rustc/9fcbc32053d5084d1de79bd484de82474cdae427/library/alloc/src/boxed.rs:1854:9
62:     0x7f196def6843 - std::sys::unix::thread::Thread::new::thread_start::heb982bb63b328588
at /rustc/9fcbc32053d5084d1de79bd484de82474cdae427/library/std/src/sys/unix/thread.rs:108:17
63:     0x7f196dc88927 - start_thread
at ./nptl/./nptl/pthread_create.c:435:8
64:     0x7f196dd189e4 - __clone
at ./misc/../sysdeps/unix/sysv/linux/x86_64/clone.S:100
65:                0x0 - <unknown>

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/issues/new?labels=C-bug%2C+I-ICE%2C+T-compiler&template=ice.md

note: rustc 1.61.0-nightly (9fcbc3205 2022-03-04) running on x86_64-unknown-linux-gnu

note: compiler flags: --crate-type bin -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 [mir_borrowck] borrow-checking `gb::<impl at src/gb/mod.rs:19:1: 53:2>::build`
#1 [analysis] running analysis passes on this crate
end of query stack
error: could not compile `rustish-gb`
user@pop-os:~/Projects/rustish$
Backtrace

user@pop-os:~/Projects/rustish$ RUST_BACKTRACE=1 cargo build
Compiling rustish-gb v0.1.0 (/home/user/Projects/rustish)
thread 'rustc' panicked at 'index out of bounds: the len is 0 but the index is 3', compiler/rustc_infer/src/infer/region_constraints/mod.rs:446:9
stack backtrace:
0: rust_begin_unwind
at /rustc/9fcbc32053d5084d1de79bd484de82474cdae427/library/std/src/panicking.rs:584:5
1: core::panicking::panic_fmt
at /rustc/9fcbc32053d5084d1de79bd484de82474cdae427/library/core/src/panicking.rs:143:14
2: core::panicking::panic_bounds_check
at /rustc/9fcbc32053d5084d1de79bd484de82474cdae427/library/core/src/panicking.rs:84:5
3: <rustc_middle::ty::sty::Region as rustc_middle::ty::relate::Relate>::relate::<rustc_infer::infer::combine::Generalizer>
4: rustc_middle::ty::relate::super_relate_tys::<rustc_infer::infer::combine::Generalizer>
5: <rustc_infer::infer::combine::Generalizer as rustc_middle::ty::relate::TypeRelation>::tys
6: rustc_middle::ty::relate::super_relate_tys::<rustc_infer::infer::combine::Generalizer>
7: <rustc_infer::infer::combine::Generalizer as rustc_middle::ty::relate::TypeRelation>::tys
8: <rustc_infer::infer::combine::CombineFields>::instantiate
9: <rustc_infer::infer::equate::Equate as rustc_middle::ty::relate::TypeRelation>::relate_with_variance::<rustc_middle::ty::subst::GenericArg>
10: <&mut rustc_middle::ty::relate::relate_substs<rustc_infer::infer::equate::Equate>::{closure#0} as core::ops::function::FnOnce<((usize, (rustc_middle::ty::subst::GenericArg, rustc_middle::ty::subst::GenericArg)),)>>::call_once
11: <rustc_infer::infer::equate::Equate as rustc_middle::ty::relate::TypeRelation>::relate_item_substs
12: rustc_middle::ty::relate::super_relate_tys::<rustc_infer::infer::equate::Equate>
13: <rustc_infer::infer::equate::Equate as rustc_middle::ty::relate::TypeRelation>::tys
14: <rustc_trait_selection::traits::select::SelectionContext>::rematch_impl
15: <rustc_trait_selection::traits::select::SelectionContext>::confirm_candidate
16: <rustc_trait_selection::traits::select::SelectionContext>::select
17: <rustc_trait_selection::traits::fulfill::FulfillProcessor>::process_changed_obligations
18: <rustc_data_structures::obligation_forest::ObligationForest<rustc_trait_selection::traits::fulfill::PendingPredicateObligation>>::process_obligations::<rustc_trait_selection::traits::fulfill::FulfillProcessor, rustc_data_structures::obligation_forest::Outcome<rustc_trait_selection::traits::fulfill::PendingPredicateObligation, rustc_infer::traits::FulfillmentErrorCode>>
19: <rustc_trait_selection::traits::fulfill::FulfillmentContext as rustc_infer::traits::engine::TraitEngine>::select_where_possible
20: <rustc_infer::infer::InferCtxtBuilder>::enter::<core::result::Result<alloc::vec::Vec<(&rustc_middle::ty::generics::GenericParamDef, alloc::string::String)>, ()>, <rustc_borrowck::MirBorrowckCtxt>::report_use_of_moved_or_uninitialized::{closure#10}>
21: <rustc_borrowck::MirBorrowckCtxt>::report_use_of_moved_or_uninitialized
22: <rustc_borrowck::MirBorrowckCtxt as rustc_mir_dataflow::framework::visitor::ResultsVisitor>::visit_statement_before_primary_effect
23: rustc_mir_dataflow::framework::visitor::visit_results::<rustc_borrowck::dataflow::BorrowckAnalyses<rustc_index::bit_set::BitSet<rustc_borrowck::dataflow::BorrowIndex>, rustc_index::bit_set::ChunkedBitSet<rustc_mir_dataflow::move_paths::MovePathIndex>, rustc_index::bit_set::ChunkedBitSet<rustc_mir_dataflow::move_paths::InitIndex>>, rustc_borrowck::dataflow::BorrowckAnalyses<rustc_mir_dataflow::framework::engine::Results<rustc_borrowck::dataflow::Borrows>, rustc_mir_dataflow::framework::engine::Results<rustc_mir_dataflow::impls::MaybeUninitializedPlaces>, rustc_mir_dataflow::framework::engine::Results<rustc_mir_dataflow::impls::EverInitializedPlaces>>, core::iter::adapters::map::Map<rustc_middle::mir::traversal::ReversePostorder, rustc_borrowck::do_mir_borrowck::{closure#2}>, rustc_borrowck::MirBorrowckCtxt>
24: rustc_borrowck::do_mir_borrowck
25: rustc_borrowck::mir_borrowck
26: <rustc_borrowck::provide::{closure#0} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::LocalDefId)>>::call_once
27: <rustc_query_system::dep_graph::graph::DepGraph<rustc_middle::dep_graph::dep_node::DepKind>>::with_task::<rustc_middle::ty::context::TyCtxt, rustc_span::def_id::LocalDefId, &rustc_middle::mir::query::BorrowCheckResult>
28: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::plumbing::QueryCtxt, rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::LocalDefId, &rustc_middle::mir::query::BorrowCheckResult>>
29: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::mir_borrowck
30: <rustc_middle::hir::map::Map>::par_body_owners::<rustc_interface::passes::analysis::{closure#2}::{closure#0}>
31: <rustc_session::session::Session>::time::<(), rustc_interface::passes::analysis::{closure#2}>
32: rustc_interface::passes::analysis
33: <rustc_query_system::dep_graph::graph::DepGraph<rustc_middle::dep_graph::dep_node::DepKind>>::with_task::<rustc_middle::ty::context::TyCtxt, (), core::result::Result<(), rustc_errors::ErrorGuaranteed>>
34: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::plumbing::QueryCtxt, rustc_query_system::query::caches::DefaultCache<(), core::result::Result<(), rustc_errors::ErrorGuaranteed>>>
35: rustc_query_system::query::plumbing::get_query::<rustc_query_impl::queries::analysis, rustc_query_impl::plumbing::QueryCtxt>
36: <rustc_interface::passes::QueryContext>::enter::<rustc_driver::run_compiler::{closure#1}::{closure#2}::{closure#3}, core::result::Result<(), rustc_errors::ErrorGuaranteed>>
37: <rustc_interface::interface::Compiler>::enter::<rustc_driver::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_errors::ErrorGuaranteed>>
38: rustc_span::with_source_map::<core::result::Result<(), rustc_errors::ErrorGuaranteed>, rustc_interface::interface::create_compiler_and_run<core::result::Result<(), rustc_errors::ErrorGuaranteed>, rustc_driver::run_compiler::{closure#1}>::{closure#1}>
39: rustc_interface::interface::create_compiler_and_run::<core::result::Result<(), rustc_errors::ErrorGuaranteed>, rustc_driver::run_compiler::{closure#1}>
40: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_errors::ErrorGuaranteed>, rustc_driver::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_errors::ErrorGuaranteed>>
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.

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/issues/new?labels=C-bug%2C+I-ICE%2C+T-compiler&template=ice.md

note: rustc 1.61.0-nightly (9fcbc3205 2022-03-04) running on x86_64-unknown-linux-gnu

note: compiler flags: --crate-type bin -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 [mir_borrowck] borrow-checking `gb::<impl at src/gb/mod.rs:19:1: 53:2>::build`
#1 [analysis] running analysis passes on this crate
end of query stack
error: could not compile `rustish-gb`
user@pop-os:~/Projects/rustish$

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    C-bugCategory: This is a bug.I-ICEIssue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.

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