ICE: 'index out of bounds: the len is 0 but the index is 1', /cargo/registry/src/github.com-1ecc6299db9ec823/ena-0.14.0/src/snapshot_vec.rs

[chengniansun]

Code

trait ConstChunksExactTrait<T> {
    fn const_chunks_exact<const N: usize>(&self) -> ConstChunksExact<T, N>;
}
impl<T> ConstChunksExactTrait<T> for [T] {
    fn const_chunks_exact<const N: usize>(&self) -> ConstChunksExact<T, N> {
        let len;
        let (fst, _) = self.split_at(len);
        ConstChunksExact { v: fst }
    }
}
struct ConstChunksExact<'a, T, const N: usize> {
    v: &'a [T],
}
impl<'a, T, const N: usize> Iterator for ConstChunksExact<'a, T, N> {
    type Item = T;
    fn next(&mut self) -> Option<Self::Item> {
        let (fst, snd) = self.v.split_at(N);
        let ptr = fst.const_chunks_exact() as *const _;
        unsafe { *ptr }
    }
}

Meta

rustc --version --verbose:

rustc 1.52.0-nightly (acca81892 2021-03-13)
binary: rustc
commit-hash: acca818928654807ed3bc1ce0e97df118f8716c8
commit-date: 2021-03-13
host: x86_64-unknown-linux-gnu
release: 1.52.0-nightly
LLVM version: 12.0.0

Error output

thread 'rustc' panicked at 'index out of bounds: the len is 0 but the index is 1', /cargo/registry/src/github.com-1ecc6299db9ec823/ena-0.14.0/src/snapshot_vec.rs:199:10
note: run with `RUST_BACKTRACE=1` environment variable to display a 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 1.52.0-nightly (acca81892 2021-03-13) running on x86_64-unknown-linux-gnu

note: compiler flags: --crate-type staticlib

query stack during panic:
#0 [type_implements_trait] evaluating `type_implements_trait` `(DefId(2:2727 ~ core[3998]::convert::From), *const std::option::Option<T>, [ConstChunksExact<T, {_: usize}>], ParamEnv { caller_bounds: [Binder(TraitPredicate(<T as std::marker::Sized>))], reveal: UserFacing })`
#1 [typeck] type-checking `<impl at perses_node_priority_with_dfs_delta_reduced_mutant.rs:14:1: 21:2>::next`
end of query stack
error: internal compiler error: trimmed_def_paths constructed
  |
  = note: delayed at    0: rustc_errors::Handler::delay_good_path_bug
             1: rustc_middle::ty::print::pretty::trimmed_def_paths
             2: rustc_query_impl::<impl rustc_query_system::query::config::QueryAccessors<rustc_query_impl::plumbing::QueryCtxt> for rustc_query_impl::queries::trimmed_def_paths>::compute
             3: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
             4: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task
             5: rustc_data_structures::stack::ensure_sufficient_stack
             6: rustc_query_system::query::plumbing::force_query_with_job
             7: rustc_query_system::query::plumbing::get_query_impl
             8: rustc_query_system::query::plumbing::get_query
             9: <rustc_middle::ty::print::pretty::FmtPrinter<F> as rustc_middle::ty::print::Printer>::print_def_path
            10: rustc_middle::ty::print::Printer::default_print_def_path
            11: <rustc_middle::ty::print::pretty::FmtPrinter<F> as rustc_middle::ty::print::Printer>::print_def_path
            12: rustc_middle::ty::print::pretty::PrettyPrinter::pretty_print_type
            13: rustc_middle::ty::print::pretty::PrettyPrinter::pretty_print_type
            14: rustc_middle::ty::print::pretty::<impl core::fmt::Display for &rustc_middle::ty::TyS>::fmt
            15: core::fmt::write
                       at /rustc/acca818928654807ed3bc1ce0e97df118f8716c8/library/core/src/fmt/mod.rs:1092:17
            16: core::fmt::Write::write_fmt
            17: rustc_infer::infer::InferCtxt::ty_to_string
            18: rustc_typeck::check::cast::CastCheck::check
            19: rustc_typeck::check::fn_ctxt::checks::<impl rustc_typeck::check::fn_ctxt::FnCtxt>::check_casts
            20: rustc_infer::infer::InferCtxtBuilder::enter
            21: rustc_typeck::check::typeck
            22: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
            23: rustc_query_system::query::plumbing::force_query_with_job
            24: rustc_query_system::query::plumbing::get_query_impl
            25: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::typeck
            26: rustc_middle::ty::<impl rustc_middle::ty::context::TyCtxt>::par_body_owners
            27: rustc_typeck::check::typeck_item_bodies
            28: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
            29: rustc_data_structures::stack::ensure_sufficient_stack
            30: rustc_query_system::query::plumbing::force_query_with_job
            31: rustc_query_system::query::plumbing::get_query_impl
            32: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::typeck_item_bodies
            33: rustc_session::utils::<impl rustc_session::session::Session>::time
            34: rustc_typeck::check_crate
            35: rustc_interface::passes::analysis
            36: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
            37: rustc_data_structures::stack::ensure_sufficient_stack
            38: rustc_query_system::query::plumbing::force_query_with_job
            39: rustc_query_system::query::plumbing::get_query_impl
            40: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::analysis
            41: rustc_interface::passes::QueryContext::enter
            42: rustc_interface::queries::<impl rustc_interface::interface::Compiler>::enter
            43: rustc_span::with_source_map
            44: scoped_tls::ScopedKey<T>::set
            45: std::sys_common::backtrace::__rust_begin_short_backtrace
            46: core::ops::function::FnOnce::call_once{{vtable.shim}}
            47: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
                       at /rustc/acca818928654807ed3bc1ce0e97df118f8716c8/library/alloc/src/boxed.rs:1546:9
                <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
                       at /rustc/acca818928654807ed3bc1ce0e97df118f8716c8/library/alloc/src/boxed.rs:1546:9
                std::sys::unix::thread::Thread::new::thread_start
                       at /rustc/acca818928654807ed3bc1ce0e97df118f8716c8/library/std/src/sys/unix/thread.rs:71:17
            48: start_thread
            49: clone


thread 'rustc' panicked at 'no warnings or errors encountered even though `delayed_good_path_bugs` issued', compiler/rustc_errors/src/lib.rs:1012:13
stack backtrace:
   0:     0x7f2b727bb930 - std::backtrace_rs::backtrace::libunwind::trace::hfe3b1cace85e87d8
                               at /rustc/acca818928654807ed3bc1ce0e97df118f8716c8/library/std/src/../../backtrace/src/backtrace/libunwind.rs:90:5
   1:     0x7f2b727bb930 - std::backtrace_rs::backtrace::trace_unsynchronized::h542330af06479043
                               at /rustc/acca818928654807ed3bc1ce0e97df118f8716c8/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x7f2b727bb930 - std::sys_common::backtrace::_print_fmt::h6b88726367858985
                               at /rustc/acca818928654807ed3bc1ce0e97df118f8716c8/library/std/src/sys_common/backtrace.rs:67:5
   3:     0x7f2b727bb930 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hcd76ce6b485adbea
                               at /rustc/acca818928654807ed3bc1ce0e97df118f8716c8/library/std/src/sys_common/backtrace.rs:46:22
   4:     0x7f2b72829abf - core::fmt::write::h127419eb46f2ecc9
                               at /rustc/acca818928654807ed3bc1ce0e97df118f8716c8/library/core/src/fmt/mod.rs:1092:17
   5:     0x7f2b727afa42 - std::io::Write::write_fmt::h0facb64ef2e7f5d8
                               at /rustc/acca818928654807ed3bc1ce0e97df118f8716c8/library/std/src/io/mod.rs:1567:15
   6:     0x7f2b727bf675 - std::sys_common::backtrace::_print::h7bf1633ea5421f7b
                               at /rustc/acca818928654807ed3bc1ce0e97df118f8716c8/library/std/src/sys_common/backtrace.rs:49:5
   7:     0x7f2b727bf675 - std::sys_common::backtrace::print::h5cc4d09049928ba5
                               at /rustc/acca818928654807ed3bc1ce0e97df118f8716c8/library/std/src/sys_common/backtrace.rs:36:9
   8:     0x7f2b727bf675 - std::panicking::default_hook::{{closure}}::h9e84dc005bfc9fc7
                               at /rustc/acca818928654807ed3bc1ce0e97df118f8716c8/library/std/src/panicking.rs:208:50
   9:     0x7f2b727bf1d3 - std::panicking::default_hook::h123278a03b1f796b
                               at /rustc/acca818928654807ed3bc1ce0e97df118f8716c8/library/std/src/panicking.rs:225:9
  10:     0x7f2b72f913fb - rustc_driver::report_ice::h036d06dbb7c2c24c
  11:     0x7f2b727bfde0 - std::panicking::rust_panic_with_hook::h4040631aa6c7bc27
                               at /rustc/acca818928654807ed3bc1ce0e97df118f8716c8/library/std/src/panicking.rs:595:17
  12:     0x7f2b727bf957 - std::panicking::begin_panic_handler::{{closure}}::h02a17b22ac092d08
                               at /rustc/acca818928654807ed3bc1ce0e97df118f8716c8/library/std/src/panicking.rs:497:13
  13:     0x7f2b727bbdec - std::sys_common::backtrace::__rust_end_short_backtrace::h6063b024443b5852
                               at /rustc/acca818928654807ed3bc1ce0e97df118f8716c8/library/std/src/sys_common/backtrace.rs:141:18
  14:     0x7f2b727bf8b9 - rust_begin_unwind
                               at /rustc/acca818928654807ed3bc1ce0e97df118f8716c8/library/std/src/panicking.rs:493:5
  15:     0x7f2b7278403b - std::panicking::begin_panic_fmt::h10b51f96d6207ff1
                               at /rustc/acca818928654807ed3bc1ce0e97df118f8716c8/library/std/src/panicking.rs:435:5
  16:     0x7f2b756a086e - rustc_errors::HandlerInner::flush_delayed::hfd981d840ce2a87f
  17:     0x7f2b7569f1e0 - <rustc_errors::HandlerInner as core::ops::drop::Drop>::drop::hcc27ba916259eda8
  18:     0x7f2b74cca396 - core::ptr::drop_in_place<rustc_session::parse::ParseSess>::hfd8ad55a7830aec9
  19:     0x7f2b74ccca10 - <alloc::rc::Rc<T> as core::ops::drop::Drop>::drop::h60fefb93b4088059
  20:     0x7f2b74cc956d - core::ptr::drop_in_place<rustc_interface::interface::Compiler>::h18cfca8587e69926
  21:     0x7f2b74cc90e8 - rustc_span::with_source_map::h512fd197bcd2b7c3
  22:     0x7f2b74ccdee3 - scoped_tls::ScopedKey<T>::set::hd407f010a973eb63
  23:     0x7f2b74ccf3a4 - std::sys_common::backtrace::__rust_begin_short_backtrace::h3c42279179caa5db
  24:     0x7f2b74cea765 - core::ops::function::FnOnce::call_once{{vtable.shim}}::hd56f564efc764ea1
  25:     0x7f2b727cf258 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hd8ea7ada17dfa868
                               at /rustc/acca818928654807ed3bc1ce0e97df118f8716c8/library/alloc/src/boxed.rs:1546:9
  26:     0x7f2b727cf258 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h91ce3a636c58b978
                               at /rustc/acca818928654807ed3bc1ce0e97df118f8716c8/library/alloc/src/boxed.rs:1546:9
  27:     0x7f2b727cf258 - std::sys::unix::thread::Thread::new::thread_start::h2e193c2e23720fdf
                               at /rustc/acca818928654807ed3bc1ce0e97df118f8716c8/library/std/src/sys/unix/thread.rs:71:17
  28:     0x7f2b726fa609 - start_thread
  29:     0x7f2b7260e293 - clone
  30:                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 1.52.0-nightly (acca81892 2021-03-13) running on x86_64-unknown-linux-gnu

note: compiler flags: --crate-type staticlib

query stack during panic:
end of query stack
thread panicked while panicking. aborting.
Illegal instruction (core dumped)

Backtrace

thread 'rustc' panicked at 'index out of bounds: the len is 0 but the index is 1', /cargo/registry/src/github.com-1ecc6299db9ec823/ena-0.14.0/src/snapshot_vec.rs:199:10
stack backtrace:
   0: rust_begin_unwind
             at /rustc/acca818928654807ed3bc1ce0e97df118f8716c8/library/std/src/panicking.rs:493:5
   1: core::panicking::panic_fmt
             at /rustc/acca818928654807ed3bc1ce0e97df118f8716c8/library/core/src/panicking.rs:92:14
   2: core::panicking::panic_bounds_check
             at /rustc/acca818928654807ed3bc1ce0e97df118f8716c8/library/core/src/panicking.rs:69:5
   3: ena::unify::UnificationTable<S>::probe_value
   4: <rustc_infer::infer::canonical::canonicalizer::Canonicalizer as rustc_middle::ty::fold::TypeFolder>::fold_const
   5: <smallvec::SmallVec<A> as core::iter::traits::collect::Extend<<A as smallvec::Array>::Item>>::extend
   6: rustc_middle::ty::fold::TypeFoldable::fold_with
   7: rustc_middle::ty::structural_impls::<impl rustc_middle::ty::fold::TypeFoldable for &rustc_middle::ty::TyS>::super_fold_with
   8: rustc_middle::ty::fold::TypeFoldable::fold_with
   9: rustc_middle::ty::fold::TypeFoldable::fold_with
  10: rustc_infer::infer::canonical::canonicalizer::Canonicalizer::canonicalize
  11: <rustc_infer::infer::InferCtxt as rustc_trait_selection::traits::query::evaluate_obligation::InferCtxtExt>::evaluate_obligation
  12: <rustc_infer::infer::InferCtxt as rustc_trait_selection::traits::query::evaluate_obligation::InferCtxtExt>::evaluate_obligation_no_overflow
  13: rustc_infer::infer::InferCtxtBuilder::enter
  14: rustc_trait_selection::traits::type_implements_trait
  15: rustc_query_impl::<impl rustc_query_system::query::config::QueryAccessors<rustc_query_impl::plumbing::QueryCtxt> for rustc_query_impl::queries::type_implements_trait>::compute
  16: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
  17: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task
  18: rustc_data_structures::stack::ensure_sufficient_stack
  19: rustc_query_system::query::plumbing::force_query_with_job
  20: rustc_query_system::query::plumbing::get_query_impl
  21: rustc_query_system::query::plumbing::get_query
  22: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::type_implements_trait
  23: rustc_typeck::check::cast::CastCheck::check
  24: rustc_typeck::check::fn_ctxt::checks::<impl rustc_typeck::check::fn_ctxt::FnCtxt>::check_casts
  25: rustc_infer::infer::InferCtxtBuilder::enter
  26: rustc_typeck::check::typeck
  27: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
  28: rustc_query_system::query::plumbing::force_query_with_job
  29: rustc_query_system::query::plumbing::get_query_impl
  30: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::typeck
  31: rustc_middle::ty::<impl rustc_middle::ty::context::TyCtxt>::par_body_owners
  32: rustc_typeck::check::typeck_item_bodies
  33: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
  34: rustc_data_structures::stack::ensure_sufficient_stack
  35: rustc_query_system::query::plumbing::force_query_with_job
  36: rustc_query_system::query::plumbing::get_query_impl
  37: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::typeck_item_bodies
  38: rustc_session::utils::<impl rustc_session::session::Session>::time
  39: rustc_typeck::check_crate
  40: rustc_interface::passes::analysis
  41: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
  42: rustc_data_structures::stack::ensure_sufficient_stack
  43: rustc_query_system::query::plumbing::force_query_with_job
  44: rustc_query_system::query::plumbing::get_query_impl
  45: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::analysis
  46: rustc_interface::passes::QueryContext::enter
  47: rustc_interface::queries::<impl rustc_interface::interface::Compiler>::enter
  48: rustc_span::with_source_map
  49: scoped_tls::ScopedKey<T>::set
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 1.52.0-nightly (acca81892 2021-03-13) running on x86_64-unknown-linux-gnu

note: compiler flags: --crate-type staticlib

query stack during panic:
#0 [type_implements_trait] evaluating `type_implements_trait` `(DefId(2:2727 ~ core[3998]::convert::From), *const std::option::Option<T>, [ConstChunksExact<T, {_: usize}>], ParamEnv { caller_bounds: [Binder(TraitPredicate(<T as std::marker::Sized>))], reveal: UserFacing })`
#1 [typeck] type-checking `<impl at perses_node_priority_with_dfs_delta_reduced_mutant.rs:14:1: 21:2>::next`
#2 [typeck_item_bodies] type-checking all item bodies
#3 [analysis] running analysis passes on this crate
end of query stack
error: internal compiler error: trimmed_def_paths constructed
  |
  = note: delayed at    0: rustc_errors::Handler::delay_good_path_bug
             1: rustc_middle::ty::print::pretty::trimmed_def_paths
             2: rustc_query_impl::<impl rustc_query_system::query::config::QueryAccessors<rustc_query_impl::plumbing::QueryCtxt> for rustc_query_impl::queries::trimmed_def_paths>::compute
             3: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
             4: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task
             5: rustc_data_structures::stack::ensure_sufficient_stack
             6: rustc_query_system::query::plumbing::force_query_with_job
             7: rustc_query_system::query::plumbing::get_query_impl
             8: rustc_query_system::query::plumbing::get_query
             9: <rustc_middle::ty::print::pretty::FmtPrinter<F> as rustc_middle::ty::print::Printer>::print_def_path
            10: rustc_middle::ty::print::Printer::default_print_def_path
            11: <rustc_middle::ty::print::pretty::FmtPrinter<F> as rustc_middle::ty::print::Printer>::print_def_path
            12: rustc_middle::ty::print::pretty::PrettyPrinter::pretty_print_type
            13: rustc_middle::ty::print::pretty::PrettyPrinter::pretty_print_type
            14: rustc_middle::ty::print::pretty::<impl core::fmt::Display for &rustc_middle::ty::TyS>::fmt
            15: core::fmt::write
                       at /rustc/acca818928654807ed3bc1ce0e97df118f8716c8/library/core/src/fmt/mod.rs:1092:17
            16: core::fmt::Write::write_fmt
            17: rustc_infer::infer::InferCtxt::ty_to_string
            18: rustc_typeck::check::cast::CastCheck::check
            19: rustc_typeck::check::fn_ctxt::checks::<impl rustc_typeck::check::fn_ctxt::FnCtxt>::check_casts
            20: rustc_infer::infer::InferCtxtBuilder::enter
            21: rustc_typeck::check::typeck
            22: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
            23: rustc_query_system::query::plumbing::force_query_with_job
            24: rustc_query_system::query::plumbing::get_query_impl
            25: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::typeck
            26: rustc_middle::ty::<impl rustc_middle::ty::context::TyCtxt>::par_body_owners
            27: rustc_typeck::check::typeck_item_bodies
            28: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
            29: rustc_data_structures::stack::ensure_sufficient_stack
            30: rustc_query_system::query::plumbing::force_query_with_job
            31: rustc_query_system::query::plumbing::get_query_impl
            32: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::typeck_item_bodies
            33: rustc_session::utils::<impl rustc_session::session::Session>::time
            34: rustc_typeck::check_crate
            35: rustc_interface::passes::analysis
            36: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
            37: rustc_data_structures::stack::ensure_sufficient_stack
            38: rustc_query_system::query::plumbing::force_query_with_job
            39: rustc_query_system::query::plumbing::get_query_impl
            40: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::analysis
            41: rustc_interface::passes::QueryContext::enter
            42: rustc_interface::queries::<impl rustc_interface::interface::Compiler>::enter
            43: rustc_span::with_source_map
            44: scoped_tls::ScopedKey<T>::set
            45: std::sys_common::backtrace::__rust_begin_short_backtrace
            46: core::ops::function::FnOnce::call_once{{vtable.shim}}
            47: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
                       at /rustc/acca818928654807ed3bc1ce0e97df118f8716c8/library/alloc/src/boxed.rs:1546:9
                <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
                       at /rustc/acca818928654807ed3bc1ce0e97df118f8716c8/library/alloc/src/boxed.rs:1546:9
                std::sys::unix::thread::Thread::new::thread_start
                       at /rustc/acca818928654807ed3bc1ce0e97df118f8716c8/library/std/src/sys/unix/thread.rs:71:17
            48: start_thread
            49: clone


thread 'rustc' panicked at 'no warnings or errors encountered even though `delayed_good_path_bugs` issued', compiler/rustc_errors/src/lib.rs:1012:13
stack backtrace:
   0:     0x7f055cafe930 - std::backtrace_rs::backtrace::libunwind::trace::hfe3b1cace85e87d8
                               at /rustc/acca818928654807ed3bc1ce0e97df118f8716c8/library/std/src/../../backtrace/src/backtrace/libunwind.rs:90:5
   1:     0x7f055cafe930 - std::backtrace_rs::backtrace::trace_unsynchronized::h542330af06479043
                               at /rustc/acca818928654807ed3bc1ce0e97df118f8716c8/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x7f055cafe930 - std::sys_common::backtrace::_print_fmt::h6b88726367858985
                               at /rustc/acca818928654807ed3bc1ce0e97df118f8716c8/library/std/src/sys_common/backtrace.rs:67:5
   3:     0x7f055cafe930 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hcd76ce6b485adbea
                               at /rustc/acca818928654807ed3bc1ce0e97df118f8716c8/library/std/src/sys_common/backtrace.rs:46:22
   4:     0x7f055cb6cabf - core::fmt::write::h127419eb46f2ecc9
                               at /rustc/acca818928654807ed3bc1ce0e97df118f8716c8/library/core/src/fmt/mod.rs:1092:17
   5:     0x7f055caf2a42 - std::io::Write::write_fmt::h0facb64ef2e7f5d8
                               at /rustc/acca818928654807ed3bc1ce0e97df118f8716c8/library/std/src/io/mod.rs:1567:15
   6:     0x7f055cb02675 - std::sys_common::backtrace::_print::h7bf1633ea5421f7b
                               at /rustc/acca818928654807ed3bc1ce0e97df118f8716c8/library/std/src/sys_common/backtrace.rs:49:5
   7:     0x7f055cb02675 - std::sys_common::backtrace::print::h5cc4d09049928ba5
                               at /rustc/acca818928654807ed3bc1ce0e97df118f8716c8/library/std/src/sys_common/backtrace.rs:36:9
   8:     0x7f055cb02675 - std::panicking::default_hook::{{closure}}::h9e84dc005bfc9fc7
                               at /rustc/acca818928654807ed3bc1ce0e97df118f8716c8/library/std/src/panicking.rs:208:50
   9:     0x7f055cb021d3 - std::panicking::default_hook::h123278a03b1f796b
                               at /rustc/acca818928654807ed3bc1ce0e97df118f8716c8/library/std/src/panicking.rs:225:9
  10:     0x7f055d2d43fb - rustc_driver::report_ice::h036d06dbb7c2c24c
  11:     0x7f055cb02de0 - std::panicking::rust_panic_with_hook::h4040631aa6c7bc27
                               at /rustc/acca818928654807ed3bc1ce0e97df118f8716c8/library/std/src/panicking.rs:595:17
  12:     0x7f055cb02957 - std::panicking::begin_panic_handler::{{closure}}::h02a17b22ac092d08
                               at /rustc/acca818928654807ed3bc1ce0e97df118f8716c8/library/std/src/panicking.rs:497:13
  13:     0x7f055cafedec - std::sys_common::backtrace::__rust_end_short_backtrace::h6063b024443b5852
                               at /rustc/acca818928654807ed3bc1ce0e97df118f8716c8/library/std/src/sys_common/backtrace.rs:141:18
  14:     0x7f055cb028b9 - rust_begin_unwind
                               at /rustc/acca818928654807ed3bc1ce0e97df118f8716c8/library/std/src/panicking.rs:493:5
  15:     0x7f055cac703b - std::panicking::begin_panic_fmt::h10b51f96d6207ff1
                               at /rustc/acca818928654807ed3bc1ce0e97df118f8716c8/library/std/src/panicking.rs:435:5
  16:     0x7f055f9e386e - rustc_errors::HandlerInner::flush_delayed::hfd981d840ce2a87f
  17:     0x7f055f9e21e0 - <rustc_errors::HandlerInner as core::ops::drop::Drop>::drop::hcc27ba916259eda8
  18:     0x7f055f00d396 - core::ptr::drop_in_place<rustc_session::parse::ParseSess>::hfd8ad55a7830aec9
  19:     0x7f055f00fa10 - <alloc::rc::Rc<T> as core::ops::drop::Drop>::drop::h60fefb93b4088059
  20:     0x7f055f00c56d - core::ptr::drop_in_place<rustc_interface::interface::Compiler>::h18cfca8587e69926
  21:     0x7f055f00c0e8 - rustc_span::with_source_map::h512fd197bcd2b7c3
  22:     0x7f055f010ee3 - scoped_tls::ScopedKey<T>::set::hd407f010a973eb63
  23:     0x7f055f0123a4 - std::sys_common::backtrace::__rust_begin_short_backtrace::h3c42279179caa5db
  24:     0x7f055f02d765 - core::ops::function::FnOnce::call_once{{vtable.shim}}::hd56f564efc764ea1
  25:     0x7f055cb12258 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hd8ea7ada17dfa868
                               at /rustc/acca818928654807ed3bc1ce0e97df118f8716c8/library/alloc/src/boxed.rs:1546:9
  26:     0x7f055cb12258 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h91ce3a636c58b978
                               at /rustc/acca818928654807ed3bc1ce0e97df118f8716c8/library/alloc/src/boxed.rs:1546:9
  27:     0x7f055cb12258 - std::sys::unix::thread::Thread::new::thread_start::h2e193c2e23720fdf
                               at /rustc/acca818928654807ed3bc1ce0e97df118f8716c8/library/std/src/sys/unix/thread.rs:71:17
  28:     0x7f055ca3d609 - start_thread
  29:     0x7f055c951293 - clone
  30:                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 1.52.0-nightly (acca81892 2021-03-13) running on x86_64-unknown-linux-gnu

note: compiler flags: --crate-type staticlib

query stack during panic:
end of query stack
thread panicked while panicking. aborting.
Illegal instruction (core dumped)

[memoryruins]

Minimized further:

fn main() {
    struct S<const N: usize>;
    S as *const ();
}

https://play.rust-lang.org/?version=nightly&mode=debug&edition=2018&gist=eae3ad910d562ea495153b2d90b5abb2

S::<0> as *const () correctly errors:

error[E0605]: non-primitive cast: `S<0_usize>` as `*const ()`
 --> src/main.rs:3:5
  |
3 |     S::<0> as *const ();
  |     ^^^^^^^^^^^^^^^^^^^ an `as` expression can only be used to convert between primitive types or to coerce to a specific trait object

[memoryruins]

@rustbot label A-const-generics

[JohnTitor]

Triage: Turned out this was a duplicate of #84841 and the issue has been fixed by #86866. Just closing as that PR has a regression test for this case.