Running cargo doc fails to generate with thread panic

[jhodapp]

Code

The following GitHub repository contains the Rust/cargo project that fails to generate cargo docs.

https://github.com/Jim-Hodapp-Coaching/esp32-wroom-rp

Meta

rustc --version --verbose:

rustc 1.64.0 (a55dd71d5 2022-09-19)
binary: rustc
commit-hash: a55dd71d5fb0ec5a6a3a9e8c27b2127ba491ce52
commit-date: 2022-09-19
host: aarch64-apple-darwin
release: 1.64.0
LLVM version: 14.0.6

Error output

$ cargo doc
 Checking unicode-ident v1.0.4
 Documenting unicode-ident v1.0.4
 Documenting void v1.0.2
 Documenting vcell v0.1.3
 Documenting defmt-parser v0.3.1
 Documenting bitfield v0.13.2
    Checking defmt-parser v0.3.1
 Documenting bitflags v1.3.2
 Documenting byteorder v1.4.3
 Documenting cfg-if v1.0.0
 Documenting ufmt-write v0.1.0
 Documenting bare-metal v1.0.0
 Documenting stable_deref_trait v1.2.0
 Documenting volatile-register v0.2.1
    Checking proc-macro2 v1.0.43
 Documenting embedded-hal v0.2.7
 Documenting num-traits v0.2.15
 Documenting proc-macro2 v1.0.43
 Documenting hash32 v0.2.1
 Documenting rtt-target v0.3.1
 Documenting critical-section v0.2.7
    Checking quote v1.0.21
 Documenting cortex-m v0.7.6
    Checking syn v1.0.99
 Documenting quote v1.0.21
 Documenting num-integer v0.1.45
 Documenting num-complex v0.3.1
 Documenting heapless v0.7.16
 Documenting panic-probe v0.3.0
 Documenting cortex-m-semihosting v0.5.0
 Documenting num-rational v0.3.2
 Documenting num-iter v0.1.43
 Documenting syn v1.0.99
 Documenting proc-macro-error-attr v1.0.4
 Documenting num v0.3.1
 Documenting embedded-time v0.12.1
    Checking proc-macro-error v1.0.4
 Documenting proc-macro-error v1.0.4
 Documenting cortex-m-rt-macros v0.7.0
 Documenting defmt-macros v0.3.2
 Documenting cortex-m-rt v0.7.1
 Documenting defmt v0.3.2
 Documenting defmt-rtt v0.3.2
 Documenting esp32-wroom-rp v0.1.0 (/Users/jhodapp/Projects/rust/esp32-wroom-rp/esp32-wroom-rp)
thread 'rustc' panicked at 'no entry found for key', src/librustdoc/passes/collect_intra_doc_links.rs:780:16
stack backtrace:
   0:        0x10628b978 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h1543c132bc4e188c
   1:        0x1062d8828 - core::fmt::write::hda8e8eb84b49cbfc
   2:        0x10627ec74 - std::io::Write::write_fmt::hb84c8996aec7120c
   3:        0x10628e5d0 - std::panicking::default_hook::{{closure}}::hdf06011cb093de6a
   4:        0x10628e334 - std::panicking::default_hook::hd7ceb942fff7b170
   5:        0x10d8d8d9c - rustc_driver[8f8caae8abf9e6c7]::DEFAULT_HOOK::{closure#0}::{closure#0}
   6:        0x10628eba4 - std::panicking::rust_panic_with_hook::h053d4067a63a6fcb
   7:        0x10628ea3c - std::panicking::begin_panic_handler::{{closure}}::hea9e6c546a23e8ff
   8:        0x10628be54 - std::sys_common::backtrace::__rust_end_short_backtrace::hd64e012cf32134c6
   9:        0x10628e794 - _rust_begin_unwind
  10:        0x106303808 - core::panicking::panic_fmt::hbfde5533e1c0592e
  11:        0x1062d55f8 - core::panicking::panic_display::hf468c4e9dd2e6682
  12:        0x1062d55bc - core::panicking::panic_str::hdef467cea0ece8e3
  13:        0x1063036f0 - core::option::expect_failed::hd1c121064ab29de2
  14:        0x105020208 - rustdoc[ee9a7b524f118911]::passes::collect_intra_doc_links::resolve_associated_trait_item
  15:        0x10501ee60 - <rustdoc[ee9a7b524f118911]::passes::collect_intra_doc_links::LinkCollector>::resolve_associated_item
  16:        0x10501e294 - <rustdoc[ee9a7b524f118911]::passes::collect_intra_doc_links::LinkCollector>::resolve
  17:        0x1050214f8 - <rustdoc[ee9a7b524f118911]::passes::collect_intra_doc_links::LinkCollector as rustdoc[ee9a7b524f118911]::visit::DocVisitor>::visit_item
  18:        0x10502e5a8 - <rustdoc[ee9a7b524f118911]::passes::collect_intra_doc_links::LinkCollector as rustdoc[ee9a7b524f118911]::visit::DocVisitor>::visit_inner_recur
  19:        0x1050234a0 - <rustdoc[ee9a7b524f118911]::passes::collect_intra_doc_links::LinkCollector as rustdoc[ee9a7b524f118911]::visit::DocVisitor>::visit_item
  20:        0x10502e544 - <rustdoc[ee9a7b524f118911]::passes::collect_intra_doc_links::LinkCollector as rustdoc[ee9a7b524f118911]::visit::DocVisitor>::visit_inner_recur
  21:        0x105023524 - <rustdoc[ee9a7b524f118911]::passes::collect_intra_doc_links::LinkCollector as rustdoc[ee9a7b524f118911]::visit::DocVisitor>::visit_item
  22:        0x10501ce2c - rustdoc[ee9a7b524f118911]::passes::collect_intra_doc_links::collect_intra_doc_links
  23:        0x1050326c4 - <rustc_session[6283a40eea3c7aa9]::session::Session>::time::<rustdoc[ee9a7b524f118911]::clean::types::Crate, rustdoc[ee9a7b524f118911]::core::run_global_ctxt::{closure#8}>
  24:        0x10500950c - rustdoc[ee9a7b524f118911]::core::run_global_ctxt
  25:        0x105036ac8 - <rustc_interface[efe2b5ffa23206d6]::passes::QueryContext>::enter::<rustdoc[ee9a7b524f118911]::main_options::{closure#0}::{closure#0}::{closure#1}, core[470b050f2b764c47]::result::Result<(), rustc_errors[b30f6c19c09b5d30]::ErrorGuaranteed>>
  26:        0x104fa097c - <rustc_interface[efe2b5ffa23206d6]::interface::Compiler>::enter::<rustdoc[ee9a7b524f118911]::main_options::{closure#0}::{closure#0}, core[470b050f2b764c47]::result::Result<(), rustc_errors[b30f6c19c09b5d30]::ErrorGuaranteed>>
  27:        0x1050ce940 - rustc_span[a44dd0315ec95fe3]::with_source_map::<core[470b050f2b764c47]::result::Result<(), rustc_errors[b30f6c19c09b5d30]::ErrorGuaranteed>, rustc_interface[efe2b5ffa23206d6]::interface::create_compiler_and_run<core[470b050f2b764c47]::result::Result<(), rustc_errors[b30f6c19c09b5d30]::ErrorGuaranteed>, rustdoc[ee9a7b524f118911]::main_options::{closure#0}>::{closure#1}>
  28:        0x104fcc5d8 - rustc_interface[efe2b5ffa23206d6]::interface::create_compiler_and_run::<core[470b050f2b764c47]::result::Result<(), rustc_errors[b30f6c19c09b5d30]::ErrorGuaranteed>, rustdoc[ee9a7b524f118911]::main_options::{closure#0}>
  29:        0x1050d1390 - <scoped_tls[438d350ce76b615a]::ScopedKey<rustc_span[a44dd0315ec95fe3]::SessionGlobals>>::set::<rustdoc[ee9a7b524f118911]::main_args::{closure#0}, core[470b050f2b764c47]::result::Result<(), rustc_errors[b30f6c19c09b5d30]::ErrorGuaranteed>>
  30:        0x104f51088 - std[dfd41530add96b74]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[efe2b5ffa23206d6]::util::run_in_thread_pool_with_globals<rustdoc[ee9a7b524f118911]::main_args::{closure#0}, core[470b050f2b764c47]::result::Result<(), rustc_errors[b30f6c19c09b5d30]::ErrorGuaranteed>>::{closure#0}, core[470b050f2b764c47]::result::Result<(), rustc_errors[b30f6c19c09b5d30]::ErrorGuaranteed>>
  31:        0x104ff6a10 - <<std[dfd41530add96b74]::thread::Builder>::spawn_unchecked_<rustc_interface[efe2b5ffa23206d6]::util::run_in_thread_pool_with_globals<rustdoc[ee9a7b524f118911]::main_args::{closure#0}, core[470b050f2b764c47]::result::Result<(), rustc_errors[b30f6c19c09b5d30]::ErrorGuaranteed>>::{closure#0}, core[470b050f2b764c47]::result::Result<(), rustc_errors[b30f6c19c09b5d30]::ErrorGuaranteed>>::{closure#1} as core[470b050f2b764c47]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  32:        0x1062973dc - std::sys::unix::thread::Thread::new::thread_start::h403ab16d5f453cd4
  33:        0x1884b026c - __pthread_deallocate

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 1.64.0 (a55dd71d5 2022-09-19) running on aarch64-apple-darwin

note: compiler flags: --crate-type lib

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

query stack during panic:
end of query stack
error: could not document `esp32-wroom-rp`

Caused by:
  process didn't exit successfully: `rustdoc --edition=2021 --crate-type lib --crate-name esp32_wroom_rp esp32-wroom-rp/src/lib.rs -o /Users/jhodapp/Projects/rust/esp32-wroom-rp/target/doc --cfg 'feature="default"' --cfg 'feature="defmt-default"' --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat -C metadata=0ccdb48f377fb2d0 -L dependency=/Users/jhodapp/Projects/rust/esp32-wroom-rp/target/debug/deps --extern cortex_m=/Users/jhodapp/Projects/rust/esp32-wroom-rp/target/debug/deps/libcortex_m-e1a21cbaac8572f4.rmeta --extern cortex_m_rt=/Users/jhodapp/Projects/rust/esp32-wroom-rp/target/debug/deps/libcortex_m_rt-6819e5a7cd0e0330.rmeta --extern cortex_m_semihosting=/Users/jhodapp/Projects/rust/esp32-wroom-rp/target/debug/deps/libcortex_m_semihosting-6a07bdc972b0ce14.rmeta --extern defmt=/Users/jhodapp/Projects/rust/esp32-wroom-rp/target/debug/deps/libdefmt-53c94002e42dd769.rmeta --extern defmt_rtt=/Users/jhodapp/Projects/rust/esp32-wroom-rp/target/debug/deps/libdefmt_rtt-7dc77180845a2b6f.rmeta --extern embedded_hal=/Users/jhodapp/Projects/rust/esp32-wroom-rp/target/debug/deps/libembedded_hal-b124b4ee0f7b537e.rmeta --extern embedded_time=/Users/jhodapp/Projects/rust/esp32-wroom-rp/target/debug/deps/libembedded_time-1a7ae12a22a40c18.rmeta --extern heapless=/Users/jhodapp/Projects/rust/esp32-wroom-rp/target/debug/deps/libheapless-839c75bc691be436.rmeta --extern panic_probe=/Users/jhodapp/Projects/rust/esp32-wroom-rp/target/debug/deps/libpanic_probe-39147bf21b928114.rmeta --crate-version 0.1.0` (exit status: 101)

Backtrace

   0:        0x102243978 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h1543c132bc4e188c
   1:        0x102290828 - core::fmt::write::hda8e8eb84b49cbfc
   2:        0x102236c74 - std::io::Write::write_fmt::hb84c8996aec7120c
   3:        0x1022465d0 - std::panicking::default_hook::{{closure}}::hdf06011cb093de6a
   4:        0x102246334 - std::panicking::default_hook::hd7ceb942fff7b170
   5:        0x109890d9c - rustc_driver[8f8caae8abf9e6c7]::DEFAULT_HOOK::{closure#0}::{closure#0}
   6:        0x102246ba4 - std::panicking::rust_panic_with_hook::h053d4067a63a6fcb
   7:        0x102246a3c - std::panicking::begin_panic_handler::{{closure}}::hea9e6c546a23e8ff
   8:        0x102243e54 - std::sys_common::backtrace::__rust_end_short_backtrace::hd64e012cf32134c6
   9:        0x102246794 - _rust_begin_unwind
  10:        0x1022bb808 - core::panicking::panic_fmt::hbfde5533e1c0592e
  11:        0x10228d5f8 - core::panicking::panic_display::hf468c4e9dd2e6682
  12:        0x10228d5bc - core::panicking::panic_str::hdef467cea0ece8e3
  13:        0x1022bb6f0 - core::option::expect_failed::hd1c121064ab29de2
  14:        0x100ffc208 - rustdoc[ee9a7b524f118911]::passes::collect_intra_doc_links::resolve_associated_trait_item
  15:        0x100ffae60 - <rustdoc[ee9a7b524f118911]::passes::collect_intra_doc_links::LinkCollector>::resolve_associated_item
  16:        0x100ffa294 - <rustdoc[ee9a7b524f118911]::passes::collect_intra_doc_links::LinkCollector>::resolve
  17:        0x100ffd4f8 - <rustdoc[ee9a7b524f118911]::passes::collect_intra_doc_links::LinkCollector as rustdoc[ee9a7b524f118911]::visit::DocVisitor>::visit_item
  18:        0x10100a5a8 - <rustdoc[ee9a7b524f118911]::passes::collect_intra_doc_links::LinkCollector as rustdoc[ee9a7b524f118911]::visit::DocVisitor>::visit_inner_recur
  19:        0x100fff4a0 - <rustdoc[ee9a7b524f118911]::passes::collect_intra_doc_links::LinkCollector as rustdoc[ee9a7b524f118911]::visit::DocVisitor>::visit_item
  20:        0x10100a544 - <rustdoc[ee9a7b524f118911]::passes::collect_intra_doc_links::LinkCollector as rustdoc[ee9a7b524f118911]::visit::DocVisitor>::visit_inner_recur
  21:        0x100fff524 - <rustdoc[ee9a7b524f118911]::passes::collect_intra_doc_links::LinkCollector as rustdoc[ee9a7b524f118911]::visit::DocVisitor>::visit_item
  22:        0x100ff8e2c - rustdoc[ee9a7b524f118911]::passes::collect_intra_doc_links::collect_intra_doc_links
  23:        0x10100e6c4 - <rustc_session[6283a40eea3c7aa9]::session::Session>::time::<rustdoc[ee9a7b524f118911]::clean::types::Crate, rustdoc[ee9a7b524f118911]::core::run_global_ctxt::{closure#8}>
  24:        0x100fe550c - rustdoc[ee9a7b524f118911]::core::run_global_ctxt
  25:        0x101012ac8 - <rustc_interface[efe2b5ffa23206d6]::passes::QueryContext>::enter::<rustdoc[ee9a7b524f118911]::main_options::{closure#0}::{closure#0}::{closure#1}, core[470b050f2b764c47]::result::Result<(), rustc_errors[b30f6c19c09b5d30]::ErrorGuaranteed>>
  26:        0x100f7c97c - <rustc_interface[efe2b5ffa23206d6]::interface::Compiler>::enter::<rustdoc[ee9a7b524f118911]::main_options::{closure#0}::{closure#0}, core[470b050f2b764c47]::result::Result<(), rustc_errors[b30f6c19c09b5d30]::ErrorGuaranteed>>
  27:        0x1010aa940 - rustc_span[a44dd0315ec95fe3]::with_source_map::<core[470b050f2b764c47]::result::Result<(), rustc_errors[b30f6c19c09b5d30]::ErrorGuaranteed>, rustc_interface[efe2b5ffa23206d6]::interface::create_compiler_and_run<core[470b050f2b764c47]::result::Result<(), rustc_errors[b30f6c19c09b5d30]::ErrorGuaranteed>, rustdoc[ee9a7b524f118911]::main_options::{closure#0}>::{closure#1}>
  28:        0x100fa85d8 - rustc_interface[efe2b5ffa23206d6]::interface::create_compiler_and_run::<core[470b050f2b764c47]::result::Result<(), rustc_errors[b30f6c19c09b5d30]::ErrorGuaranteed>, rustdoc[ee9a7b524f118911]::main_options::{closure#0}>
  29:        0x1010ad390 - <scoped_tls[438d350ce76b615a]::ScopedKey<rustc_span[a44dd0315ec95fe3]::SessionGlobals>>::set::<rustdoc[ee9a7b524f118911]::main_args::{closure#0}, core[470b050f2b764c47]::result::Result<(), rustc_errors[b30f6c19c09b5d30]::ErrorGuaranteed>>
  30:        0x100f2d088 - std[dfd41530add96b74]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[efe2b5ffa23206d6]::util::run_in_thread_pool_with_globals<rustdoc[ee9a7b524f118911]::main_args::{closure#0}, core[470b050f2b764c47]::result::Result<(), rustc_errors[b30f6c19c09b5d30]::ErrorGuaranteed>>::{closure#0}, core[470b050f2b764c47]::result::Result<(), rustc_errors[b30f6c19c09b5d30]::ErrorGuaranteed>>
  31:        0x100fd2a10 - <<std[dfd41530add96b74]::thread::Builder>::spawn_unchecked_<rustc_interface[efe2b5ffa23206d6]::util::run_in_thread_pool_with_globals<rustdoc[ee9a7b524f118911]::main_args::{closure#0}, core[470b050f2b764c47]::result::Result<(), rustc_errors[b30f6c19c09b5d30]::ErrorGuaranteed>>::{closure#0}, core[470b050f2b764c47]::result::Result<(), rustc_errors[b30f6c19c09b5d30]::ErrorGuaranteed>>::{closure#1} as core[470b050f2b764c47]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  32:        0x10224f3dc - std::sys::unix::thread::Thread::new::thread_start::h403ab16d5f453cd4
  33:        0x1884b026c - __pthread_deallocate

[petrochenkov]

I've reproduced the issue on nightly rustc, I'll check what happens.
In the meantime if you can minimize the failing case as much as possible, it would be very helpful.

[petrochenkov]

Fixed in #103120.

[jhodapp]

Thanks for such a quick turnaround on this!