Nightly ICE during build of `rkyv`

[fu5ha]

Code

Unfortunately I don't have a minimal repro. See the changes listed in this commit: rkyv/rkyv@8e558b3

Not caused by the above changes, it seems just compiling rkyv with latest nightly ICEs identically. I'll try to bisect which nightly it first fails on...

Full failing job output here https://github.com/rkyv/rkyv/actions/runs/3235626058/jobs/5300317316

Meta

rustc --version --verbose:

rustc 1.66.0-nightly (db0597f56 2022-10-11)
binary: rustc
commit-hash: db0597f5619d5ed93feca28e61226d3581cc7867
commit-date: 2022-10-11
host: x86_64-unknown-linux-gnu
release: 1.66.0-nightly
LLVM version: 15.0.2

It compiles fine on my computer which is not on nightly:

➜  rkyv git:(relptr-from-raw-parts) rustc --version --verbose
rustc 1.63.0 (4b91a6ea7 2022-08-08)
binary: rustc
commit-hash: 4b91a6ea7258a947e59c6522cd5898e7c0a6a88f
commit-date: 2022-08-08
host: aarch64-apple-darwin
release: 1.63.0
LLVM version: 14.0.5

Error output

thread 'rustc' panicked at 'unexpected unresolved segments', /rustc/db0597f5619d5ed93feca28e61226d3581cc7867/compiler/rustc_hir/src/def.rs:475:9
...
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 1.66.0-nightly (db0597f56 2022-10-11) running on x86_64-unknown-linux-gnu

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

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

query stack during panic:
end of query stack
error: could not compile `rkyv`

Caused by:
  process didn't exit successfully: `rustc --crate-name rkyv --edition=2018 rkyv/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 --cfg 'feature="alloc"' --cfg 'feature="bytecheck"' --cfg 'feature="default"' --cfg 'feature="hashbrown"' --cfg 'feature="rend"' --cfg 'feature="size_32"' --cfg 'feature="std"' --cfg 'feature="validation"' -C metadata=6083e43e48ddcc38 -C extra-filename=-6083e43e48ddcc38 --out-dir /home/runner/work/rkyv/rkyv/target/debug/deps -L dependency=/home/runner/work/rkyv/rkyv/target/debug/deps --extern bytecheck=/home/runner/work/rkyv/rkyv/target/debug/deps/libbytecheck-d7c830c75cd9ce4e.rmeta --extern hashbrown=/home/runner/work/rkyv/rkyv/target/debug/deps/libhashbrown-ba069aef4711cd2b.rmeta --extern ptr_meta=/home/runner/work/rkyv/rkyv/target/debug/deps/libptr_meta-035d3af8c9bd90ec.rmeta --extern rend=/home/runner/work/rkyv/rkyv/target/debug/deps/librend-81254a0eac94b69a.rmeta --extern rkyv_derive=/home/runner/work/rkyv/rkyv/target/debug/deps/librkyv_derive-abdc556d2c2df1e9.so --extern seahash=/home/runner/work/rkyv/rkyv/target/debug/deps/libseahash-c28b18ad[170](https://github.com/rkyv/rkyv/actions/runs/3235626058/jobs/5300317316#step:4:171)5ad1d.rmeta --cfg has_atomics_64 --cfg has_atomics` (exit status: 101)

Backtrace

stack backtrace:
   0:     0x7f51b52f35b0 - std::backtrace_rs::backtrace::libunwind::trace::h0bf6f02637fe6971
                               at /rustc/db0597f5619d5ed93feca28e61226d3581cc7867/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   1:     0x7f51b52f35b0 - std::backtrace_rs::backtrace::trace_unsynchronized::hca573de4ebdee142
                               at /rustc/db0597f5619d5ed93feca28e61226d3581cc7867/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x7f51b52f35b0 - std::sys_common::backtrace::_print_fmt::h78a3b0f3fa5431ce
                               at /rustc/db0597f5619d5ed93feca28e61226d3581cc7867/library/std/src/sys_common/backtrace.rs:66:5
   3:     0x7f51b52f35b0 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h388012888db78658
                               at /rustc/db0597f5619d5ed93feca28e61226d3581cc7867/library/std/src/sys_common/backtrace.rs:45:22
   4:     0x7f51b534f59e - core::fmt::write::h8541eee12bfb22e1
                               at /rustc/db0597f5619d5ed93feca28e61226d3581cc7867/library/core/src/fmt/mod.rs:1209:17
   5:     0x7f51b52e3835 - std::io::Write::write_fmt::haf5892ef07750179
                               at /rustc/db0597f5619d5ed93feca28e61226d3581cc7867/library/std/src/io/mod.rs:1680:15
   6:     0x7f51b52f6353 - std::sys_common::backtrace::_print::hd2a58ab324867b58
                               at /rustc/db0597f5619d5ed93feca28e61226d3581cc7867/library/std/src/sys_common/backtrace.rs:48:5
   7:     0x7f51b52f6353 - std::sys_common::backtrace::print::h62650e0a0854a421
                               at /rustc/db0597f5619d5ed93feca28e61226d3581cc7867/library/std/src/sys_common/backtrace.rs:35:9
   8:     0x7f51b52f6353 - std::panicking::default_hook::{{closure}}::h0c0249b3670af819
                               at /rustc/db0597f5619d5ed93feca28e61226d3581cc7867/library/std/src/panicking.rs:267:22
   9:     0x7f51b52f602a - std::panicking::default_hook::hdd3bdd204a1e5f34
                               at /rustc/db0597f5619d5ed93feca28e61226d3581cc7867/library/std/src/panicking.rs:286:9
  10:     0x7f51b7c32641 - rustc_driver[1f63e0707e3aafaf]::DEFAULT_HOOK::{closure#0}::{closure#0}
  11:     0x7f51b52f6b8b - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h6f493fd9c4eb244a
                               at /rustc/db0597f5619d5ed93feca28e61226d3581cc7867/library/alloc/src/boxed.rs:1952:9
  12:     0x7f51b52f6b8b - std::panicking::rust_panic_with_hook::hcdeb5a66936a633b
                               at /rustc/db0597f5619d5ed93feca28e61226d3581cc7867/library/std/src/panicking.rs:673:13
  13:     0x7f51b52f69e7 - std::panicking::begin_panic_handler::{{closure}}::h76d64f438650eafd
                               at /rustc/db0597f5619d5ed93feca28e61226d3581cc7867/library/std/src/panicking.rs:560:13
  14:     0x7f51b52f3a5c - std::sys_common::backtrace::__rust_end_short_backtrace::h6159ba2d4e07f4de
                               at /rustc/db0597f5619d5ed93feca28e61226d3581cc7867/library/std/src/sys_common/backtrace.rs:138:18
  15:     0x7f51b52f6702 - rust_begin_unwind
                               at /rustc/db0597f5619d5ed93feca28e61226d3581cc7867/library/std/src/panicking.rs:556:5
  16:     0x7f51b534c173 - core::panicking::panic_fmt::h811742b56cf0125a
                               at /rustc/db0597f5619d5ed93feca28e61226d3581cc7867/library/core/src/panicking.rs:142:14
  17:     0x7f51b534c031 - core::panicking::panic_display::h6303aa0d1e0b1fa9
                               at /rustc/db0597f5619d5ed93feca28e61226d3581cc7867/library/core/src/panicking.rs:72:5
  18:     0x7f51b534bfdb - core::panicking::panic_str::hbb50b0306ce7b150
                               at /rustc/db0597f5619d5ed93feca28e61226d3581cc7867/library/core/src/panicking.rs:56:5
  19:     0x7f51b534bd16 - core::option::expect_failed::h4c43dc39e1c41a00
                               at /rustc/db0597f5619d5ed93feca28e61226d3581cc7867/library/core/src/option.rs:1876:5
  20:     0x7f51b6919199 - <rustc_resolve[290e47d8627a4365]::late::LateResolutionVisitor as rustc_ast[10d65a8be6722286]::visit::Visitor>::visit_fn
  21:     0x7f51b6909736 - <rustc_resolve[290e47d8627a4365]::late::LateResolutionVisitor>::resolve_item
  22:     0x7f51b69150a6 - rustc_ast[10d65a8be6722286]::visit::walk_item::<rustc_resolve[290e47d8627a4365]::late::LateResolutionVisitor>
  23:     0x7f51b69046a1 - <rustc_resolve[290e47d8627a4365]::late::LateResolutionVisitor>::resolve_item
  24:     0x7f51b69150a6 - rustc_ast[10d65a8be6722286]::visit::walk_item::<rustc_resolve[290e47d8627a4365]::late::LateResolutionVisitor>
  25:     0x7f51b69046a1 - <rustc_resolve[290e47d8627a4365]::late::LateResolutionVisitor>::resolve_item
  26:     0x7f51b69011ea - <rustc_resolve[290e47d8627a4365]::late::LateResolutionVisitor as rustc_ast[10d65a8be6722286]::visit::Visitor>::visit_item
  27:     0x7f51b6901016 - <rustc_resolve[290e47d8627a4365]::Resolver>::late_resolve_crate
  28:     0x7f51b690092a - <rustc_session[8b98ba4aacc9d309]::session::Session>::time::<(), <rustc_resolve[290e47d8627a4365]::Resolver>::resolve_crate::{closure#0}>
  29:     0x7f51b68fe8c3 - <rustc_interface[cf2fa28a67e8bef]::passes::boxed_resolver::BoxedResolver>::access::<<rustc_interface[cf2fa28a67e8bef]::queries::Queries>::expansion::{closure#0}::{closure#0}, core[fae631be8e3c81b5]::result::Result<rustc_ast[10d65a8be6722286]::ast::Crate, rustc_errors[d5334a4a25fbb3[94](https://github.com/rkyv/rkyv/actions/runs/3235626058/jobs/5300317316#step:4:95)]::ErrorGuaranteed>>
  30:     0x7f51b68e[96](https://github.com/rkyv/rkyv/actions/runs/3235626058/jobs/5300317316#step:4:97)88 - <rustc_interface[cf2fa28a67e8bef]::queries::Queries>::expansion
  31:     0x7f51b68e739c - <rustc_interface[cf2fa28a67e8bef]::interface::Compiler>::enter::<rustc_driver[1f63e0707e3aafaf]::run_compiler::{closure#1}::{closure#2}, core[fae631be8e3c81b5]::result::Result<core[fae631be8e3c81b5]::option::Option<rustc_interface[cf2fa28a67e8bef]::queries::Linker>, rustc_errors[d5334a4a25fbb394]::ErrorGuaranteed>>
  32:     0x7f51b68e243c - rustc_span[ddec628aeed15f05]::with_source_map::<core[fae631be8e3c81b5]::result::Result<(), rustc_errors[d5334a4a25fbb394]::ErrorGuaranteed>, rustc_interface[cf2fa28a67e8bef]::interface::create_compiler_and_run<core[fae631be8e3c81b5]::result::Result<(), rustc_errors[d5334a4a25fbb394]::ErrorGuaranteed>, rustc_driver[1f63e0707e3aafaf]::run_compiler::{closure#1}>::{closure#1}>
  33:     0x7f51b68e1e3f - rustc_interface[cf2fa28a67e8bef]::interface::create_compiler_and_run::<core[fae631be8e3c81b5]::result::Result<(), rustc_errors[d5334a4a25fbb394]::ErrorGuaranteed>, rustc_driver[1f63e0707e3aafaf]::run_compiler::{closure#1}>
  34:     0x7f51b68e1032 - <scoped_tls[4da31d6f3f5146b7]::ScopedKey<rustc_span[ddec628aeed15f05]::SessionGlobals>>::set::<rustc_interface[cf2fa28a67e8bef]::interface::run_compiler<core[fae631be8e3c81b5]::result::Result<(), rustc_errors[d5334a4a25fbb394]::ErrorGuaranteed>, rustc_driver[1f63e0707e3aafaf]::run_compiler::{closure#1}>::{closure#0}, core[fae631be8e3c81b5]::result::Result<(), rustc_errors[d5334a4a25fbb394]::ErrorGuaranteed>>
  35:     0x7f51b68e050f - std[7bd0f41fe60b70b6]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[cf2fa28a67e8bef]::util::run_in_thread_pool_with_globals<rustc_interface[cf2fa28a67e8bef]::interface::run_compiler<core[fae631be8e3c81b5]::result::Result<(), rustc_errors[d5334a4a25fbb394]::ErrorGuaranteed>, rustc_driver[1f63e0707e3aafaf]::run_compiler::{closure#1}>::{closure#0}, core[fae631be8e3c81b5]::result::Result<(), rustc_errors[d5334a4a25fbb394]::ErrorGuaranteed>>::{closure#0}, core[fae631be8e3c81b5]::result::Result<(), rustc_errors[d5334a4a25fbb394]::ErrorGuaranteed>>
  36:     0x7f51b68e037f - <<std[7bd0f41fe60b70b6]::thread::Builder>::spawn_unchecked_<rustc_interface[cf2fa28a67e8bef]::util::run_in_thread_pool_with_globals<rustc_interface[cf2fa28a67e8bef]::interface::run_compiler<core[fae631be8e3c81b5]::result::Result<(), rustc_errors[d5334a4a25fbb394]::ErrorGuaranteed>, rustc_driver[1f63e0707e3aafaf]::run_compiler::{closure#1}>::{closure#0}, core[fae631be8e3c81b5]::result::Result<(), rustc_errors[d5334a4a25fbb394]::ErrorGuaranteed>>::{closure#0}, core[fae631be8e3c81b5]::result::Result<(), rustc_errors[d5334a4a25fbb394]::ErrorGuaranteed>>::{closure#1} as core[fae631be8e3c81b5]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  37:     0x7f51b5300793 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hc67cb2c032770d7f
                               at /rustc/db05[97](https://github.com/rkyv/rkyv/actions/runs/3235626058/jobs/5300317316#step:4:98)f5619d5ed93feca28e61226d3581cc7867/library/alloc/src/boxed.rs:1938:9
  38:     0x7f51b5300793 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::he79e59a805a8533c
                               at /rustc/db0597f5619d5ed93feca28e61226d3581cc7867/library/alloc/src/boxed.rs:1938:9
  39:     0x7f51b5300793 - std::sys::unix::thread::Thread::new::thread_start::hae509166483801f9
                               at /rustc/db0597f5619d5ed93feca28e61226d3581cc7867/library/std/src/sys/unix/thread.rs:[108](https://github.com/rkyv/rkyv/actions/runs/3235626058/jobs/5300317316#step:4:109):17
  40:     0x7f51b51c7609 - start_thread
  41:     0x7f51b50ea[133](https://github.com/rkyv/rkyv/actions/runs/3235626058/jobs/5300317316#step:4:134) - clone
  42:                0x0 - <unknown>

[fu5ha]

Okay I'm failing at bisecting which nightly it fails on, but it's at least known good on nightly-2022-10-05 since that was the last time rkyv had a CI build on nightly, which succeeded.

[matthiaskrgr]

Probably another duplicate of #102946

[fu5ha]

Yep, looks like it!