chore: roll nightly to 2022-10-07

[hawkw]

This commit updates Mycelium's pinned nightly version to Rust nightly-2022-10-09. Unfortunately, this currently doesn't work, due to linker errors when linking with the bootloader (see rust-osdev/bootloader#271).

[hawkw]

Looks like the linker error is due to a rustc regression introduced in nightly-2022-10-08 where the compiler started eating pre-link-args in target files: rust-lang/rust#101988 (comment). PR rust-lang/rust#102836 should fix this.

For now, I'll try pinning our nightly to 2022-10-07.

[hawkw]

The only thing that's breaking here is RustDoc, which is weird because it works for me locally...

[hawkw]

Ah, looks like the RustDoc panic is rust-lang/rust#103463

[hawkw]

Hmm, the fix for the RustDoc issue seems to have merged 3 days ago (rust-lang/rust#103649), so I'm surprised it's not in yesterday's nightly?

[hawkw]

Issue appears to be related to building the docs for the acpi crate:

DEBUG rustdoc::passes::collect_intra_doc_links combined_docs=Unmap the given physical mapping. This is called when a `PhysicalMapping` is dropped, you should **not** manually call this.

Note: A reference to the handler used to construct `region` can be acquired by calling [`PhysicalMapping::handler`].

DEBUG rustdoc::passes::collect_intra_doc_links PhysicalMapping::handler resolved to None in namespace MacroNS
DEBUG rustdoc::passes::collect_intra_doc_links PhysicalMapping::handler resolved to None in namespace TypeNS
DEBUG rustdoc::passes::collect_intra_doc_links PhysicalMapping resolved to Some(Def(Struct, DefId(45:12 ~ rsdp[ef1a]::handler::PhysicalMapping))) in namespace TypeNS
DEBUG rustdoc::passes::collect_intra_doc_links looking for associated item named handler for item DefId(45:12 ~ rsdp[ef1a]::handler::PhysicalMapping)
┐rustdoc::passes::collect_intra_doc_links::trait_impls_for ty=acpi::PhysicalMapping<H, T>, module=DefId(45:4 ~ rsdp[ef1a]::handler)
thread 'rustc' panicked at 'no entry found for key', src/librustdoc/passes/collect_intra_doc_links.rs:781:16
stack backtrace:
   0: rust_begin_unwind
             at /rustc/215e3cd218b83b8a3152d84d92f17109253c25e1/library/std/src/panicking.rs:575:5
   1: core::panicking::panic_fmt
             at /rustc/215e3cd218b83b8a3152d84d92f17109253c25e1/library/core/src/panicking.rs:65:14
   2: core::panicking::panic_display
             at /rustc/215e3cd218b83b8a3152d84d92f17109253c25e1/library/core/src/panicking.rs:139:5
   3: core::panicking::panic_str
             at /rustc/215e3cd218b83b8a3152d84d92f17109253c25e1/library/core/src/panicking.rs:123:5
   4: core::option::expect_failed
             at /rustc/215e3cd218b83b8a3152d84d92f17109253c25e1/library/core/src/option.rs:1879:5
   5: rustdoc::passes::collect_intra_doc_links::resolve_associated_trait_item
   6: <rustdoc::passes::collect_intra_doc_links::LinkCollector>::resolve_associated_item
   7: <rustdoc::passes::collect_intra_doc_links::LinkCollector>::resolve
   8: <rustdoc::passes::collect_intra_doc_links::LinkCollector as rustdoc::visit::DocVisitor>::visit_item
   9: rustdoc::passes::collect_intra_doc_links::collect_intra_doc_links
  10: <rustc_session::session::Session>::time::<rustdoc::clean::types::Crate, rustdoc::core::run_global_ctxt::{closure#7}>
  11: rustdoc::core::run_global_ctxt
  12: <rustc_interface::passes::QueryContext>::enter::<rustdoc::main_args::{closure#1}::{closure#0}::{closure#1}, core::result::Result<(), rustc_errors::ErrorGuaranteed>>
  13: <rustc_interface::interface::Compiler>::enter::<rustdoc::main_args::{closure#1}::{closure#0}, core::result::Result<(), rustc_errors::ErrorGuaranteed>>
  14: rustc_span::with_source_map::<core::result::Result<(), rustc_errors::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_errors::ErrorGuaranteed>, rustdoc::main_args::{closure#1}>::{closure#0}::{closure#1}>
  15: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_errors::ErrorGuaranteed>, rustdoc::main_args::{closure#1}>::{closure#0}, core::result::Result<(), rustc_errors::ErrorGuaranteed>>
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.
┘rustdoc::passes::collect_intra_doc_links::trait_impls_for ty=acpi::PhysicalMapping<H, T>, module=DefId(45:4 ~ rsdp[ef1a]::handler)
error: could not document `mycelium-kernel`

[hawkw]

Opened rust-lang/rust#104421, since this appears to be a different panic from the one that was fixed.

Update: looks like that's probably a duplicate of rust-lang/rust#104145, which appears to have a PR open to fix it...hopefully that'll be in the next nightly and we can see if it fixes our issue as well.