Internal compiler error: no errors encountered even though delay_span_bug issued

[dignifiedquire]

Ran into this while writing some code using rkyv. Below is the smallest version I could come up with

Code

use std::borrow::Cow;

use bytecheck::CheckBytes;
use rkyv::{with, AlignedVec, Archive, Deserialize, Infallible, Serialize};

#[derive(Archive, Deserialize, Serialize, Debug, PartialEq, Clone)]
#[archive_attr(derive(CheckBytes))]
struct Response<'a> {
    id: u64,
    data: Res<'a>,
}

#[derive(Archive, Deserialize, Serialize, Debug, PartialEq, Clone)]
#[archive_attr(derive(CheckBytes))]
enum Res<'a> {
    NotFound,
    Found {
        #[with(with::AsOwned)]
        data: Cow<'a, [u8]>,
    },
}

fn main() {
    use rkyv::ser::{serializers::AllocSerializer, Serializer};

    let data = vec![0u8; 10];
    let value = Response {
        id: 1,
        data: Res::Found {
            data: Cow::Borrowed(&data[..]),
        },
    };

    let mut serializer = AllocSerializer::<0>::default();
    serializer.serialize_value(&value).unwrap();
    let bytes = serializer.into_serializer().into_inner();
    let archived = rkyv::check_archived_root::<Response>(&bytes[..]).unwrap();
}

Meta

rustc --version --verbose:

rustc --version --verbose
rustc 1.68.0-nightly (cc47b0699 2023-01-08)
binary: rustc
commit-hash: cc47b069983292e4ee8982d5dabe6301452c5f25
commit-date: 2023-01-08
host: x86_64-unknown-linux-gnu
release: 1.68.0-nightly
LLVM version: 15.0.6

Error output

warning: Error finalizing incremental compilation session directory `/home/dig/opensource/sendme/target/debug/incremental/bug-33mav586xwwvk/s-gh4q7w4i
ib-6vgmy4-working`: No such file or directory (os error 2)

error: internal compiler error: no errors encountered even though `delay_span_bug` issued

error: internal compiler error: failed to normalize <<With<Cow<'_, [u8]>, AsOwned> as Archive>::Archived as bytecheck::CheckBytes<__C>>::Error
  --> src/bug.rs:14:23

Backtrace

warning: unused imports: `AlignedVec`, `Infallible`
 --> src/bug.rs:4:12
  |
4 | use rkyv::{Infallible, AlignedVec, Deserialize, Archive, Serializ...
  |            ^^^^^^^^^^  ^^^^^^^^^^
  |
  = note: `#[warn(unused_imports)]` on by default

warning: unused variable: `archived`
  --> src/bug.rs:35:9
   |
35 |     let archived = rkyv::check_archived_root::<Response>(&bytes[...
   |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_archived`
   |
   = note: `#[warn(unused_variables)]` on by default

warning: Error finalizing incremental compilation session directory `/home/dig/opensource/sendme/target/debug/incremental/bug-33mav586xwwvk/s-gh4q7w4i
ib-6vgmy4-working`: No such file or directory (os error 2)

error: internal compiler error: no errors encountered even though `delay_span_bug` issued

error: internal compiler error: failed to normalize <<With<Cow<'_, [u8]>, AsOwned> as Archive>::Archived as bytecheck::CheckBytes<__C>>::Error
  --> src/bug.rs:14:23
   |
14 | #[archive_attr(derive(CheckBytes))]
   |                       ^^^^^^^^^^
   |
   = note: delayed at /rustc/cc47b069983292e4ee8982d5dabe6301452c5f25/compiler/rustc_const_eval/src/interpret/eval_context.rs:510:31
   = note: this error: internal compiler error originates in the derive macro `CheckBytes` (in Nightly builds, run with -Z macro-backtrace for more in
fo)

error: internal compiler error: failed to normalize Box<<<With<Cow<'_, [u8]>, AsOwned> as Archive>::Archived as bytecheck::CheckBytes<__C>>::Error>
  --> src/bug.rs:14:23
   |
14 | #[archive_attr(derive(CheckBytes))]
   |                       ^^^^^^^^^^
   |
   = note: delayed at /rustc/cc47b069983292e4ee8982d5dabe6301452c5f25/compiler/rustc_const_eval/src/interpret/eval_context.rs:510:31
   = note: this error: internal compiler error originates in the derive macro `CheckBytes` (in Nightly builds, run with -Z macro-backtrace for more in
fo)

error: internal compiler error: failed to normalize <<Res<'_> as Archive>::Archived as bytecheck::CheckBytes<__C>>::Error
 --> src/bug.rs:6:10
  |
6 | #[derive(Archive, Deserialize, Serialize, Debug, PartialEq, Clone)]
  |          ^^^^^^^
  |
  = note: delayed at /rustc/cc47b069983292e4ee8982d5dabe6301452c5f25/compiler/rustc_const_eval/src/interpret/eval_context.rs:510:31
  = note: this error: internal compiler error originates in the derive macro `Archive` (in Nightly builds, run with -Z macro-backtrace for more info)

error: internal compiler error: failed to normalize Box<<<Res<'_> as Archive>::Archived as bytecheck::CheckBytes<__C>>::Error>
 --> src/bug.rs:6:10
  |
6 | #[derive(Archive, Deserialize, Serialize, Debug, PartialEq, Clone)]
  |          ^^^^^^^
  |
  |
  = note: delayed at /rustc/cc47b069983292e4ee8982d5dabe6301452c5f25/compiler/rustc_const_eval/src/interpret/eval_context.rs:510:31
  = note: this error: internal compiler error originates in the derive macro `Archive` (in Nightly builds, run with -Z macro-backtrace for more info)

thread 'rustc' panicked at 'Box<dyn Any>', compiler/rustc_errors/src/lib.rs:1638:13
stack backtrace:
   0:     0x7f0acf7eb31a - std::backtrace_rs::backtrace::libunwind::trace::h226871b03ab0ff9d
                               at /rustc/cc47b069983292e4ee8982d5dabe6301452c5f25/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
   1:     0x7f0acf7eb31a - std::backtrace_rs::backtrace::trace_unsynchronized::hfec460a379dfa930
                               at /rustc/cc47b069983292e4ee8982d5dabe6301452c5f25/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x7f0acf7eb31a - std::sys_common::backtrace::_print_fmt::h47e3347a7a00a0b8
                               at /rustc/cc47b069983292e4ee8982d5dabe6301452c5f25/library/std/src/sys_common/backtrace.rs:65:5
   3:     0x7f0acf7eb31a - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h29295205afe55042
                               at /rustc/cc47b069983292e4ee8982d5dabe6301452c5f25/library/std/src/sys_common/backtrace.rs:44:22
   4:     0x7f0acf84e55e - core::fmt::write::hff0191b598fb3b0b
                               at /rustc/cc47b069983292e4ee8982d5dabe6301452c5f25/library/core/src/fmt/mod.rs:1208:17
   5:     0x7f0acf7db8f5 - std::io::Write::write_fmt::hbb504f8b613362a3
                               at /rustc/cc47b069983292e4ee8982d5dabe6301452c5f25/library/std/src/io/mod.rs:1682:15
   6:     0x7f0acf7eb0e5 - std::sys_common::backtrace::_print::h4823cbf15bd070e6
                               at /rustc/cc47b069983292e4ee8982d5dabe6301452c5f25/library/std/src/sys_common/backtrace.rs:47:5
   7:     0x7f0acf7eb0e5 - std::sys_common::backtrace::print::hf66f5a9cb072cea8
                               at /rustc/cc47b069983292e4ee8982d5dabe6301452c5f25/library/std/src/sys_common/backtrace.rs:34:9
   8:     0x7f0acf7edeaf - std::panicking::default_hook::{{closure}}::h7bc0efdcc3bf56a7
                               at /rustc/cc47b069983292e4ee8982d5dabe6301452c5f25/library/std/src/panicking.rs:267:22
   9:     0x7f0acf7edbeb - std::panicking::default_hook::h3f54f5b4fb31e406
                               at /rustc/cc47b069983292e4ee8982d5dabe6301452c5f25/library/std/src/panicking.rs:286:9
  10:     0x7f0ad2b2a604 - <rustc_driver[18602304c3814321]::DEFAULT_HOOK::{closure#0}::{closure#0} as core[86ba13369de38d4f]::ops::function::FnOnce<(&
core[86ba13369de38d4f]::panic::panic_info::PanicInfo,)>>::call_once::{shim:vtable#0}
  11:     0x7f0acf7ee6ed - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h110d68855a8f4925
  12:     0x7f0acf7ee6ed - std::panicking::rust_panic_with_hook::haada24ea54b92d70                                                           [15/7527]
                               at /rustc/cc47b069983292e4ee8982d5dabe6301452c5f25/library/std/src/panicking.rs:692:13                                   13:     0x7f0ad2b4abd1 - std[b80f5c9d0036a11a]::panicking::begin_panic::<rustc_errors[109729f310d9e279]::ExplicitBug>::{closure#0}                    14:     0x7f0ad2b48446 - std[b80f5c9d0036a11a]::sys_common::backtrace::__rust_end_short_backtrace::<std[b80f5c9d0036a11a]::panicking::begin_panic<ru
stc_errors[109729f310d9e279]::ExplicitBug>::{closure#0}, !>                                                                                             15:     0x7f0ad2b40c06 - std[b80f5c9d0036a11a]::panicking::begin_panic::<rustc_errors[109729f310d9e279]::ExplicitBug>                                 16:     0x7f0ad2b41e06 - std[b80f5c9d0036a11a]::panic::panic_any::<rustc_errors[109729f310d9e279]::ExplicitBug>                                       17:     0x7f0ad2068cc6 - <rustc_errors[109729f310d9e279]::HandlerInner>::flush_delayed::<alloc[593078ccfaa74f72]::vec::Vec<rustc_errors[109729f310d9e279]::diagnostic::Diagnostic>, &str, rustc_errors[109729f310d9e279]::ExplicitBug>
  18:     0x7f0ad2067fcb - <rustc_errors[109729f310d9e279]::HandlerInner as core[86ba13369de38d4f]::ops::drop::Drop>::drop                              19:     0x7f0ad1d5b31e - core[86ba13369de38d4f]::ptr::drop_in_place::<rustc_session[428dcc9dad4836a4]::parse::ParseSess>                              20:     0x7f0ad1d4a24f - core[86ba13369de38d4f]::ptr::drop_in_place::<rustc_session[428dcc9dad4836a4]::session::Session>                              21:     0x7f0ad1d49f80 - core[86ba13369de38d4f]::ptr::drop_in_place::<rustc_interface[50bdaa1023eb7121]::interface::Compiler>                         22:     0x7f0ad1d49051 - rustc_span[4276d354efecb51]::with_source_map::<core[86ba13369de38d4f]::result::Result<(), rustc_errors[109729f310d9e279]::E
rrorGuaranteed>, rustc_interface[50bdaa1023eb7121]::interface::run_compiler<core[86ba13369de38d4f]::result::Result<(), rustc_errors[109729f310d9e279]:
:ErrorGuaranteed>, rustc_driver[18602304c3814321]::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
  23:     0x7f0ad1d48965 - <scoped_tls[d847452d4e157dba]::ScopedKey<rustc_span[4276d354efecb51]::SessionGlobals>>::set::<rustc_interface[50bdaa1023eb7
121]::interface::run_compiler<core[86ba13369de38d4f]::result::Result<(), rustc_errors[109729f310d9e279]::ErrorGuaranteed>, rustc_driver[18602304c38143
21]::run_compiler::{closure#1}>::{closure#0}, core[86ba13369de38d4f]::result::Result<(), rustc_errors[109729f310d9e279]::ErrorGuaranteed>>
  24:     0x7f0ad1d47f52 - std[b80f5c9d0036a11a]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[50bdaa1023eb7121]::util::run_i
n_thread_pool_with_globals<rustc_interface[50bdaa1023eb7121]::interface::run_compiler<core[86ba13369de38d4f]::result::Result<(), rustc_errors[109729f3
10d9e279]::ErrorGuaranteed>, rustc_driver[18602304c3814321]::run_compiler::{closure#1}>::{closure#0}, core[86ba13369de38d4f]::result::Result<(), rustc
_errors[109729f310d9e279]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[86ba13369de38d4f]::result::Result<(), rustc_errors[109729f310d9e279]::Err
orGuaranteed>>
  25:     0x7f0ad23f09aa - <<std[b80f5c9d0036a11a]::thread::Builder>::spawn_unchecked_<rustc_interface[50bdaa1023eb7121]::util::run_in_thread_pool_wit
h_globals<rustc_interface[50bdaa1023eb7121]::interface::run_compiler<core[86ba13369de38d4f]::result::Result<(), rustc_errors[109729f310d9e279]::ErrorG
uaranteed>, rustc_driver[18602304c3814321]::run_compiler::{closure#1}>::{closure#0}, core[86ba13369de38d4f]::result::Result<(), rustc_errors[109729f31
0d9e279]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[86ba13369de38d4f]::result::Result<(), rustc_errors[109729f310d9e279]::ErrorGuaranteed>>::{
closure#1} as core[86ba13369de38d4f]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  26:     0x7f0acf7f8b23 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h379e1b9bda46509f
                               at /rustc/cc47b069983292e4ee8982d5dabe6301452c5f25/library/alloc/src/boxed.rs:1988:9
  27:     0x7f0acf7f8b23 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hf86d10042d2e6078
                               at /rustc/cc47b069983292e4ee8982d5dabe6301452c5f25/library/alloc/src/boxed.rs:1988:9
  28:     0x7f0acf7f8b23 - std::sys::unix::thread::Thread::new::thread_start::h3f27ea3a68953b7e
                               at /rustc/cc47b069983292e4ee8982d5dabe6301452c5f25/library/std/src/sys/unix/thread.rs:108:17
  29:     0x7f0acf55a78d - <unknown>
  30:     0x7f0acf5db8e4 - clone
  31:                0x0 - <unknown>
  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 1.68.0-nightly (cc47b0699 2023-01-08) running on x86_64-unknown-linux-gnu

note: compiler flags: --crate-type bin -C embed-bitcode=no -C debuginfo=2 -C incremental=[REDACTED]

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

query stack during panic:
end of query stack
warning: `sendme` (bin "bug") generated 3 warnings (run `cargo fix --bin "bug"` to apply 2 suggestions)
error: could not compile `sendme`; 3 warnings emitted```

</p>
</details>

[compiler-errors]

This is a duplicate of #94651 I think.

[compiler-errors]

This was fixed (afaict) by #107688.