Closed
Description
auto-reduced (treereduce-rust):
struct Foo;
impl Drop for Foo {
thread_local!(static SPLOK: u32 = 0);
}
thread_local!(static Box: Foo = Foo);original:
//@ run-pass
//@ needs-threads
use std::thread;
struct Foo;
impl Drop for Foo {
thread_local! {
// no docs
#[allow(unused)]
static FOO: i32 = 42;
/// docs
pub static BAR: String = String::from("bar");
// look at these restrictions!!
pub(crate) static BAZ: usize = 0;
pub(in foo) static QUUX: usize = 0;
}
thread_local!(static SPLOK: u32 = 0);
}
thread_local!(static Box: Foo = Foo);
fn main() {
// Off the main thread due to #28129, be sure to initialize FOO first before
// calling `println!`
thread::spawn(|| {
FOO.with(|_| {});
println!("test1");
})
.join()
.unwrap();
}Version information
rustc 1.88.0-nightly (4f0de4c81 2025-04-02)
binary: rustc
commit-hash: 4f0de4c81d80121ac7b576bc68d8016064f4d261
commit-date: 2025-04-02
host: x86_64-unknown-linux-gnu
release: 1.88.0-nightly
LLVM version: 20.1.1
Possibly related line of code:
rust/compiler/rustc_const_eval/src/const_eval/fn_queries.rs
Lines 37 to 49 in 4f0de4c
Command:
/home/matthias/.rustup/toolchains/master/bin/rustc
Program output
error[E0438]: const `SPLOK` is not a member of trait `Drop`
--> /tmp/icemaker_global_tempdir.iMZkdTjDBtF1/rustc_testrunner_tmpdir_reporting.H4njEG4lXrr3/mvce.rs:4:5
|
4 | thread_local!(static SPLOK: u32 = 0);
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ not a member of trait `Drop`
|
= note: this error originates in the macro `$crate::thread::local_impl::thread_local_inner` which comes from the expansion of the macro `thread_local` (in Nightly builds, run with -Z macro-backtrace for more info)
error[E0601]: `main` function not found in crate `mvce`
--> /tmp/icemaker_global_tempdir.iMZkdTjDBtF1/rustc_testrunner_tmpdir_reporting.H4njEG4lXrr3/mvce.rs:7:38
|
7 | thread_local!(static Box: Foo = Foo);
| ^ consider adding a `main` function to `/tmp/icemaker_global_tempdir.iMZkdTjDBtF1/rustc_testrunner_tmpdir_reporting.H4njEG4lXrr3/mvce.rs`
error[E0046]: not all trait items implemented, missing: `drop`
--> /tmp/icemaker_global_tempdir.iMZkdTjDBtF1/rustc_testrunner_tmpdir_reporting.H4njEG4lXrr3/mvce.rs:3:1
|
3 | impl Drop for Foo {
| ^^^^^^^^^^^^^^^^^ missing `drop` in implementation
|
= help: implement the missing item: `fn drop(&mut self) { todo!() }`
error: internal compiler error: should not be requesting the constness of items that can't be const: ImplItem(
ImplItem {
ident: SPLOK#0,
owner_id: DefId(0:6 ~ mvce[fb01]::{impl#0}::SPLOK),
generics: Generics {
params: [],
predicates: [],
has_where_clause_predicates: false,
where_clause_span: /home/matthias/.rustup/toolchains/master/lib/rustlib/src/rust/library/std/src/sys/thread_local/native/mod.rs:108:68: 108:68 (#10),
span: /home/matthias/.rustup/toolchains/master/lib/rustlib/src/rust/library/std/src/sys/thread_local/native/mod.rs:108:38: 108:38 (#10),
},
kind: Const(
Ty {
hir_id: HirId(DefId(0:6 ~ mvce[fb01]::{impl#0}::SPLOK).1),
span: /home/matthias/.rustup/toolchains/master/lib/rustlib/src/rust/library/std/src/sys/thread_local/native/mod.rs:108:40: 108:68 (#10),
kind: Path(
Resolved(
None,
Path {
span: /home/matthias/.rustup/toolchains/master/lib/rustlib/src/rust/library/std/src/sys/thread_local/native/mod.rs:108:40: 108:68 (#10),
res: Def(
Struct,
DefId(1:571 ~ std[64a3]::thread::local::LocalKey),
),
segments: [
PathSegment {
ident: $crate#10,
hir_id: HirId(DefId(0:6 ~ mvce[fb01]::{impl#0}::SPLOK).2),
res: Def(
Mod,
DefId(1:0 ~ std[64a3]),
),
args: None,
infer_args: false,
},
PathSegment {
ident: thread#10,
hir_id: HirId(DefId(0:6 ~ mvce[fb01]::{impl#0}::SPLOK).3),
res: Def(
Mod,
DefId(1:406 ~ std[64a3]::thread),
),
args: None,
infer_args: false,
},
PathSegment {
ident: LocalKey#10,
hir_id: HirId(DefId(0:6 ~ mvce[fb01]::{impl#0}::SPLOK).6),
res: Def(
Struct,
DefId(1:571 ~ std[64a3]::thread::local::LocalKey),
),
args: Some(
GenericArgs {
args: [
Type(
Ty {
hir_id: HirId(DefId(0:6 ~ mvce[fb01]::{impl#0}::SPLOK).4),
span: /tmp/icemaker_global_tempdir.iMZkdTjDBtF1/rustc_testrunner_tmpdir_reporting.H4njEG4lXrr3/mvce.rs:4:33: 4:36 (#0),
kind: Path(
Resolved(
None,
Path {
span: /tmp/icemaker_global_tempdir.iMZkdTjDBtF1/rustc_testrunner_tmpdir_reporting.H4njEG4lXrr3/mvce.rs:4:33: 4:36 (#0),
res: PrimTy(
Uint(
U32,
),
),
segments: [
PathSegment {
ident: u32#0,
hir_id: HirId(DefId(0:6 ~ mvce[fb01]::{impl#0}::SPLOK).5),
res: PrimTy(
Uint(
U32,
),
),
args: None,
infer_args: false,
},
],
},
),
),
},
),
],
constraints: [],
parenthesized: No,
span_ext: /home/matthias/.rustup/toolchains/master/lib/rustlib/src/rust/library/std/src/sys/thread_local/native/mod.rs:108:64: 108:68 (#10),
},
),
infer_args: false,
},
],
},
),
),
},
BodyId {
hir_id: HirId(DefId(0:6 ~ mvce[fb01]::{impl#0}::SPLOK).7),
},
),
defaultness: Final,
span: /home/matthias/.rustup/toolchains/master/lib/rustlib/src/rust/library/std/src/sys/thread_local/native/mod.rs:108:22: 109:81 (#10),
vis_span: /home/matthias/.rustup/toolchains/master/lib/rustlib/src/rust/library/std/src/sys/thread_local/native/mod.rs:108:22: 108:22 (#10),
},
): AssocConst
--> /tmp/icemaker_global_tempdir.iMZkdTjDBtF1/rustc_testrunner_tmpdir_reporting.H4njEG4lXrr3/mvce.rs:4:5
|
4 | thread_local!(static SPLOK: u32 = 0);
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: this error: internal compiler error originates in the macro `$crate::thread::local_impl::thread_local_inner` which comes from the expansion of the macro `thread_local` (in Nightly builds, run with -Z macro-backtrace for more info)
thread 'rustc' panicked at compiler/rustc_const_eval/src/const_eval/fn_queries.rs:43:27:
Box<dyn Any>
stack backtrace:
0: 0x7310a3271b23 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::h6276d246583c5920
1: 0x7310a3a06111 - core::fmt::write::h1ce97450a6826ddd
2: 0x7310a4ea2fd1 - std::io::Write::write_fmt::h9303e97b3c369b59
3: 0x7310a3271982 - std::sys::backtrace::BacktraceLock::print::hea9f14d6ca9b0147
4: 0x7310a327546a - std::panicking::default_hook::{{closure}}::h47e4ac810bd31853
5: 0x7310a3274fef - std::panicking::default_hook::h0a321ea46395d69c
6: 0x7310a22ec910 - std[64a3ecc47e3ea7b6]::panicking::update_hook::<alloc[b66be81d450b4e53]::boxed::Box<rustc_driver_impl[364dfd96f8312c97]::install_ice_hook::{closure#1}>>::{closure#0}
7: 0x7310a3275ce3 - std::panicking::rust_panic_with_hook::hf664c17233f51fc1
8: 0x7310a232bd31 - std[64a3ecc47e3ea7b6]::panicking::begin_panic::<rustc_errors[ce2661ba159e5cd2]::ExplicitBug>::{closure#0}
9: 0x7310a231f926 - std[64a3ecc47e3ea7b6]::sys::backtrace::__rust_end_short_backtrace::<std[64a3ecc47e3ea7b6]::panicking::begin_panic<rustc_errors[ce2661ba159e5cd2]::ExplicitBug>::{closure#0}, !>
10: 0x7310a231f5a7 - std[64a3ecc47e3ea7b6]::panicking::begin_panic::<rustc_errors[ce2661ba159e5cd2]::ExplicitBug>
11: 0x7310a2335591 - <rustc_errors[ce2661ba159e5cd2]::diagnostic::BugAbort as rustc_errors[ce2661ba159e5cd2]::diagnostic::EmissionGuarantee>::emit_producing_guarantee
12: 0x7310a2222f10 - <rustc_errors[ce2661ba159e5cd2]::DiagCtxtHandle>::span_bug::<rustc_span[16c8bd6e3b329917]::span_encoding::Span, alloc[b66be81d450b4e53]::string::String>
13: 0x7310a3f4076a - rustc_const_eval[2390ba62feb5bb12]::const_eval::fn_queries::constness
14: 0x7310a3f3ffb7 - rustc_query_impl[45df45b8015af900]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[45df45b8015af900]::query_impl::constness::dynamic_query::{closure#2}::{closure#0}, rustc_middle[952277fedfa7cd0]::query::erase::Erased<[u8; 1usize]>>
15: 0x7310a3f3dd18 - rustc_query_system[70e2f348503a4b9c]::query::plumbing::try_execute_query::<rustc_query_impl[45df45b8015af900]::DynamicConfig<rustc_query_system[70e2f348503a4b9c]::query::caches::DefIdCache<rustc_middle[952277fedfa7cd0]::query::erase::Erased<[u8; 1usize]>>, false, false, false>, rustc_query_impl[45df45b8015af900]::plumbing::QueryCtxt, false>
16: 0x7310a3f3d808 - rustc_query_impl[45df45b8015af900]::query_impl::constness::get_query_non_incr::__rust_end_short_backtrace
17: 0x7310a46c54cc - rustc_trait_selection[6fb3ce8d98383ae4]::traits::effects::evaluate_host_effect_obligation
18: 0x7310a43ed9a0 - <rustc_trait_selection[6fb3ce8d98383ae4]::traits::fulfill::FulfillProcessor as rustc_data_structures[845dae019623b7f5]::obligation_forest::ObligationProcessor>::process_obligation
19: 0x7310a3a07d04 - <rustc_data_structures[845dae019623b7f5]::obligation_forest::ObligationForest<rustc_trait_selection[6fb3ce8d98383ae4]::traits::fulfill::PendingPredicateObligation>>::process_obligations::<rustc_trait_selection[6fb3ce8d98383ae4]::traits::fulfill::FulfillProcessor>
20: 0x7310a3ef1d62 - <rustc_trait_selection[6fb3ce8d98383ae4]::traits::fulfill::FulfillmentContext<rustc_infer[b309e7d4c50f26cd]::traits::engine::ScrubbedTraitError> as rustc_infer[b309e7d4c50f26cd]::traits::engine::TraitEngine<rustc_infer[b309e7d4c50f26cd]::traits::engine::ScrubbedTraitError>>::select_all_or_error
21: 0x7310a4703e32 - <rustc_const_eval[2390ba62feb5bb12]::check_consts::qualifs::NeedsNonConstDrop as rustc_const_eval[2390ba62feb5bb12]::check_consts::qualifs::Qualif>::in_any_value_of_ty
22: 0x7310a4702e20 - <rustc_const_eval[2390ba62feb5bb12]::check_consts::check::Qualifs>::needs_non_const_drop
23: 0x7310a4701953 - rustc_mir_transform[868be19dd7dc581f]::mir_const_qualif
24: 0x7310a47016a5 - rustc_query_impl[45df45b8015af900]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[45df45b8015af900]::query_impl::mir_const_qualif::dynamic_query::{closure#2}::{closure#0}, rustc_middle[952277fedfa7cd0]::query::erase::Erased<[u8; 4usize]>>
25: 0x7310a47009eb - rustc_query_system[70e2f348503a4b9c]::query::plumbing::try_execute_query::<rustc_query_impl[45df45b8015af900]::DynamicConfig<rustc_query_system[70e2f348503a4b9c]::query::caches::DefIdCache<rustc_middle[952277fedfa7cd0]::query::erase::Erased<[u8; 4usize]>>, false, false, false>, rustc_query_impl[45df45b8015af900]::plumbing::QueryCtxt, false>
26: 0x7310a470074e - rustc_query_impl[45df45b8015af900]::query_impl::mir_const_qualif::get_query_non_incr::__rust_end_short_backtrace
27: 0x7310a114452f - rustc_mir_transform[868be19dd7dc581f]::mir_promoted
28: 0x7310a439ff92 - rustc_query_impl[45df45b8015af900]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[45df45b8015af900]::query_impl::mir_promoted::dynamic_query::{closure#2}::{closure#0}, rustc_middle[952277fedfa7cd0]::query::erase::Erased<[u8; 16usize]>>
29: 0x7310a43a022a - rustc_query_system[70e2f348503a4b9c]::query::plumbing::try_execute_query::<rustc_query_impl[45df45b8015af900]::DynamicConfig<rustc_data_structures[845dae019623b7f5]::vec_cache::VecCache<rustc_span[16c8bd6e3b329917]::def_id::LocalDefId, rustc_middle[952277fedfa7cd0]::query::erase::Erased<[u8; 16usize]>, rustc_query_system[70e2f348503a4b9c]::dep_graph::graph::DepNodeIndex>, false, false, false>, rustc_query_impl[45df45b8015af900]::plumbing::QueryCtxt, false>
30: 0x7310a4bb860b - rustc_query_impl[45df45b8015af900]::query_impl::mir_promoted::get_query_non_incr::__rust_end_short_backtrace
31: 0x7310a4bb86ed - rustc_query_impl[45df45b8015af900]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[45df45b8015af900]::query_impl::mir_borrowck::dynamic_query::{closure#2}::{closure#0}, rustc_middle[952277fedfa7cd0]::query::erase::Erased<[u8; 8usize]>>
32: 0x7310a3cb1f6c - rustc_query_system[70e2f348503a4b9c]::query::plumbing::try_execute_query::<rustc_query_impl[45df45b8015af900]::DynamicConfig<rustc_data_structures[845dae019623b7f5]::vec_cache::VecCache<rustc_span[16c8bd6e3b329917]::def_id::LocalDefId, rustc_middle[952277fedfa7cd0]::query::erase::Erased<[u8; 8usize]>, rustc_query_system[70e2f348503a4b9c]::dep_graph::graph::DepNodeIndex>, false, false, false>, rustc_query_impl[45df45b8015af900]::plumbing::QueryCtxt, false>
33: 0x7310a3cb19cb - rustc_query_impl[45df45b8015af900]::query_impl::mir_borrowck::get_query_non_incr::__rust_end_short_backtrace
34: 0x7310a3ead9e3 - rustc_mir_transform[868be19dd7dc581f]::mir_drops_elaborated_and_const_checked
35: 0x7310a3ead0e5 - rustc_query_impl[45df45b8015af900]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[45df45b8015af900]::query_impl::mir_drops_elaborated_and_const_checked::dynamic_query::{closure#2}::{closure#0}, rustc_middle[952277fedfa7cd0]::query::erase::Erased<[u8; 8usize]>>
36: 0x7310a3cb1f6c - rustc_query_system[70e2f348503a4b9c]::query::plumbing::try_execute_query::<rustc_query_impl[45df45b8015af900]::DynamicConfig<rustc_data_structures[845dae019623b7f5]::vec_cache::VecCache<rustc_span[16c8bd6e3b329917]::def_id::LocalDefId, rustc_middle[952277fedfa7cd0]::query::erase::Erased<[u8; 8usize]>, rustc_query_system[70e2f348503a4b9c]::dep_graph::graph::DepNodeIndex>, false, false, false>, rustc_query_impl[45df45b8015af900]::plumbing::QueryCtxt, false>
37: 0x7310a3cb184b - rustc_query_impl[45df45b8015af900]::query_impl::mir_drops_elaborated_and_const_checked::get_query_non_incr::__rust_end_short_backtrace
38: 0x7310a3f70a06 - rustc_mir_transform[868be19dd7dc581f]::mir_for_ctfe
39: 0x7310a3f70827 - rustc_query_impl[45df45b8015af900]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[45df45b8015af900]::query_impl::mir_for_ctfe::dynamic_query::{closure#2}::{closure#0}, rustc_middle[952277fedfa7cd0]::query::erase::Erased<[u8; 8usize]>>
40: 0x7310a3d585ef - rustc_query_system[70e2f348503a4b9c]::query::plumbing::try_execute_query::<rustc_query_impl[45df45b8015af900]::DynamicConfig<rustc_query_system[70e2f348503a4b9c]::query::caches::DefIdCache<rustc_middle[952277fedfa7cd0]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[45df45b8015af900]::plumbing::QueryCtxt, false>
41: 0x7310a48a5dbb - rustc_query_impl[45df45b8015af900]::query_impl::mir_for_ctfe::get_query_non_incr::__rust_end_short_backtrace
42: 0x7310a48a5ee7 - <rustc_const_eval[2390ba62feb5bb12]::interpret::eval_context::InterpCx<rustc_const_eval[2390ba62feb5bb12]::const_eval::machine::CompileTimeMachine>>::load_mir
43: 0x7310a4b49a2a - rustc_const_eval[2390ba62feb5bb12]::const_eval::eval_queries::eval_static_initializer_provider
44: 0x7310a4b49627 - rustc_query_impl[45df45b8015af900]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[45df45b8015af900]::query_impl::eval_static_initializer::dynamic_query::{closure#2}::{closure#0}, rustc_middle[952277fedfa7cd0]::query::erase::Erased<[u8; 16usize]>>
45: 0x7310a4b49609 - <rustc_query_impl[45df45b8015af900]::query_impl::eval_static_initializer::dynamic_query::{closure#2} as core[4c10ad9516df98d8]::ops::function::FnOnce<(rustc_middle[952277fedfa7cd0]::ty::context::TyCtxt, rustc_span[16c8bd6e3b329917]::def_id::DefId)>>::call_once
46: 0x7310a3c77300 - rustc_query_system[70e2f348503a4b9c]::query::plumbing::try_execute_query::<rustc_query_impl[45df45b8015af900]::DynamicConfig<rustc_query_system[70e2f348503a4b9c]::query::caches::DefIdCache<rustc_middle[952277fedfa7cd0]::query::erase::Erased<[u8; 16usize]>>, false, false, false>, rustc_query_impl[45df45b8015af900]::plumbing::QueryCtxt, false>
47: 0x7310a4b13166 - rustc_query_impl[45df45b8015af900]::query_impl::eval_static_initializer::get_query_non_incr::__rust_end_short_backtrace
48: 0x7310a3cb02bb - rustc_hir_analysis[c0538ce4abe59eb]::check_crate
49: 0x7310a41c8fa5 - rustc_interface[809c8c781064d3fa]::passes::run_required_analyses
50: 0x7310a41b74de - rustc_interface[809c8c781064d3fa]::passes::analysis
51: 0x7310a41b74b3 - rustc_query_impl[45df45b8015af900]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[45df45b8015af900]::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle[952277fedfa7cd0]::query::erase::Erased<[u8; 0usize]>>
52: 0x7310a49b99bd - rustc_query_system[70e2f348503a4b9c]::query::plumbing::try_execute_query::<rustc_query_impl[45df45b8015af900]::DynamicConfig<rustc_query_system[70e2f348503a4b9c]::query::caches::SingleCache<rustc_middle[952277fedfa7cd0]::query::erase::Erased<[u8; 0usize]>>, false, false, false>, rustc_query_impl[45df45b8015af900]::plumbing::QueryCtxt, false>
53: 0x7310a49b96b8 - rustc_query_impl[45df45b8015af900]::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace
54: 0x7310a4b9380d - rustc_interface[809c8c781064d3fa]::passes::create_and_enter_global_ctxt::<core[4c10ad9516df98d8]::option::Option<rustc_interface[809c8c781064d3fa]::queries::Linker>, rustc_driver_impl[364dfd96f8312c97]::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}
55: 0x7310a4b5cf2a - rustc_interface[809c8c781064d3fa]::interface::run_compiler::<(), rustc_driver_impl[364dfd96f8312c97]::run_compiler::{closure#0}>::{closure#1}
56: 0x7310a499bfd2 - std[64a3ecc47e3ea7b6]::sys::backtrace::__rust_begin_short_backtrace::<rustc_interface[809c8c781064d3fa]::util::run_in_thread_with_globals<rustc_interface[809c8c781064d3fa]::util::run_in_thread_pool_with_globals<rustc_interface[809c8c781064d3fa]::interface::run_compiler<(), rustc_driver_impl[364dfd96f8312c97]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>
57: 0x7310a499c8b4 - <<std[64a3ecc47e3ea7b6]::thread::Builder>::spawn_unchecked_<rustc_interface[809c8c781064d3fa]::util::run_in_thread_with_globals<rustc_interface[809c8c781064d3fa]::util::run_in_thread_pool_with_globals<rustc_interface[809c8c781064d3fa]::interface::run_compiler<(), rustc_driver_impl[364dfd96f8312c97]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>::{closure#1} as core[4c10ad9516df98d8]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
58: 0x7310a499dcab - std::sys::pal::unix::thread::Thread::new::thread_start::hcc40a29411d3318b
59: 0x73109e8a370a - <unknown>
60: 0x73109e927aac - <unknown>
61: 0x0 - <unknown>
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: please make sure that you have updated to the latest nightly
note: rustc 1.88.0-nightly (4f0de4c81 2025-04-02) running on x86_64-unknown-linux-gnu
query stack during panic:
#0 [constness] checking if item is const: `<impl at /tmp/icemaker_global_tempdir.iMZkdTjDBtF1/rustc_testrunner_tmpdir_reporting.H4njEG4lXrr3/mvce.rs:3:1: 3:18>::SPLOK`
#1 [mir_const_qualif] const checking `Box::{constant#0}::{closure#0}::VAL`
#2 [mir_promoted] promoting constants in MIR for `Box::{constant#0}::{closure#0}::VAL`
#3 [mir_borrowck] borrow-checking `Box::{constant#0}::{closure#0}::VAL`
#4 [mir_drops_elaborated_and_const_checked] elaborating drops for `Box::{constant#0}::{closure#0}::VAL`
#5 [mir_for_ctfe] caching mir of `Box::{constant#0}::{closure#0}::VAL` for CTFE | = note: this failure-note originates in the macro `$crate::thread::local_impl::thread_local_inner` which comes from the expansion of the macro `thread_local` (in Nightly builds, run with -Z macro-backtrace for more info)
#6 [eval_static_initializer] evaluating initializer of static `Box::{constant#0}::{closure#0}::VAL`
#7 [analysis] running analysis passes on this crate
end of query stack
error: aborting due to 4 previous errors
Some errors have detailed explanations: E0046, E0438, E0601.
For more information about an error, try `rustc --explain E0046`.