cargo doc panic on Polkadot build

[nuke-web3]

Originally reported: paritytech/polkadot#5665

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rustc --version --verbose:

rustc 1.61.0 (fe5b13d68 2022-05-18)
binary: rustc
commit-hash: fe5b13d681f25ee6474be29d748c65adcd91f69e
commit-date: 2022-05-18
host: x86_64-unknown-linux-gnu
release: 1.61.0
LLVM version: 14.0.0

Error output

Documenting polkadot-node-subsystem v0.9.23 (./polkadot/node/subsystem)
thread 'rustc' panicked at 'no entry found for key', src/librustdoc/passes/collect_intra_doc_links.rs:977:16
stack backtrace:
   0:     0x7ff97869e1cd - std::backtrace_rs::backtrace::libunwind::trace::h22893a5306c091b4
                               at /rustc/fe5b13d681f25ee6474be29d748c65adcd91f69e/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
   1:     0x7ff97869e1cd - std::backtrace_rs::backtrace::trace_unsynchronized::h29c3bc6f9e91819d
                               at /rustc/fe5b13d681f25ee6474be29d748c65adcd91f69e/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x7ff97869e1cd - std::sys_common::backtrace::_print_fmt::he497d8a0ec903793
                               at /rustc/fe5b13d681f25ee6474be29d748c65adcd91f69e/library/std/src/sys_common/backtrace.rs:66:5
   3:     0x7ff97869e1cd - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h9c2a9d2774d81873
                               at /rustc/fe5b13d681f25ee6474be29d748c65adcd91f69e/library/std/src/sys_common/backtrace.rs:45:22
   4:     0x7ff9786f801c - core::fmt::write::hba4337c43d992f49
                               at /rustc/fe5b13d681f25ee6474be29d748c65adcd91f69e/library/core/src/fmt/mod.rs:1194:17
   5:     0x7ff97868f7c1 - std::io::Write::write_fmt::heb73de6e02cfabed
                               at /rustc/fe5b13d681f25ee6474be29d748c65adcd91f69e/library/std/src/io/mod.rs:1655:15
   6:     0x7ff9786a12b5 - std::sys_common::backtrace::_print::h63c8b24acdd8e8ce
                               at /rustc/fe5b13d681f25ee6474be29d748c65adcd91f69e/library/std/src/sys_common/backtrace.rs:48:5
   7:     0x7ff9786a12b5 - std::sys_common::backtrace::print::h426700d6240cdcc2
                               at /rustc/fe5b13d681f25ee6474be29d748c65adcd91f69e/library/std/src/sys_common/backtrace.rs:35:9
   8:     0x7ff9786a12b5 - std::panicking::default_hook::{{closure}}::hc9a76eed0b18f82b
                               at /rustc/fe5b13d681f25ee6474be29d748c65adcd91f69e/library/std/src/panicking.rs:295:22
   9:     0x7ff9786a0f69 - std::panicking::default_hook::h2e88d02087fae196
                               at /rustc/fe5b13d681f25ee6474be29d748c65adcd91f69e/library/std/src/panicking.rs:314:9
  10:     0x7ff978ead1d1 - rustc_driver[413d55b6344850e3]::DEFAULT_HOOK::{closure#0}::{closure#0}
  11:     0x7ff9786a1a00 - std::panicking::rust_panic_with_hook::habfdcc2e90f9fd4c
                               at /rustc/fe5b13d681f25ee6474be29d748c65adcd91f69e/library/std/src/panicking.rs:702:17
  12:     0x7ff9786a1837 - std::panicking::begin_panic_handler::{{closure}}::he054b2a83a51d2cd
                               at /rustc/fe5b13d681f25ee6474be29d748c65adcd91f69e/library/std/src/panicking.rs:588:13
  13:     0x7ff97869e684 - std::sys_common::backtrace::__rust_end_short_backtrace::ha48b94ab49b30915
                               at /rustc/fe5b13d681f25ee6474be29d748c65adcd91f69e/library/std/src/sys_common/backtrace.rs:138:18
  14:     0x7ff9786a1569 - rust_begin_unwind
                               at /rustc/fe5b13d681f25ee6474be29d748c65adcd91f69e/library/std/src/panicking.rs:584:5
  15:     0x7ff9786656b3 - core::panicking::panic_fmt::h366d3a309ae17c94
                               at /rustc/fe5b13d681f25ee6474be29d748c65adcd91f69e/library/core/src/panicking.rs:143:14
  16:     0x7ff9786f4e31 - core::panicking::panic_display::hd3e89d99fb893792
                               at /rustc/fe5b13d681f25ee6474be29d748c65adcd91f69e/library/core/src/panicking.rs:72:5
  17:     0x7ff9786f4ddb - core::panicking::panic_str::h98ed104b0c03a108
                               at /rustc/fe5b13d681f25ee6474be29d748c65adcd91f69e/library/core/src/panicking.rs:56:5
  18:     0x7ff978665526 - core::option::expect_failed::h58d487f78ae9d247
                               at /rustc/fe5b13d681f25ee6474be29d748c65adcd91f69e/library/core/src/option.rs:1874:5
  19:     0x55bbb44799c9 - rustdoc[2368e8ab35c11ae8]::passes::collect_intra_doc_links::resolve_associated_trait_item
  20:     0x55bbb44781de - <rustdoc[2368e8ab35c11ae8]::passes::collect_intra_doc_links::LinkCollector>::resolve_associated_item
  21:     0x55bbb44753c5 - <rustdoc[2368e8ab35c11ae8]::passes::collect_intra_doc_links::LinkCollector>::resolve
  22:     0x55bbb447b6ae - <rustdoc[2368e8ab35c11ae8]::passes::collect_intra_doc_links::LinkCollector as rustdoc[2368e8ab35c11ae8]::visit::DocVisitor>::visit_item
  23:     0x55bbb44872ca - <rustdoc[2368e8ab35c11ae8]::passes::collect_intra_doc_links::LinkCollector as rustdoc[2368e8ab35c11ae8]::visit::DocVisitor>::visit_inner_recur
  24:     0x55bbb447e880 - <rustdoc[2368e8ab35c11ae8]::passes::collect_intra_doc_links::LinkCollector as rustdoc[2368e8ab35c11ae8]::visit::DocVisitor>::visit_item
  25:     0x55bbb44872ca - <rustdoc[2368e8ab35c11ae8]::passes::collect_intra_doc_links::LinkCollector as rustdoc[2368e8ab35c11ae8]::visit::DocVisitor>::visit_inner_recur
  26:     0x55bbb447e880 - <rustdoc[2368e8ab35c11ae8]::passes::collect_intra_doc_links::LinkCollector as rustdoc[2368e8ab35c11ae8]::visit::DocVisitor>::visit_item
  27:     0x55bbb44872ca - <rustdoc[2368e8ab35c11ae8]::passes::collect_intra_doc_links::LinkCollector as rustdoc[2368e8ab35c11ae8]::visit::DocVisitor>::visit_inner_recur
  28:     0x55bbb447e880 - <rustdoc[2368e8ab35c11ae8]::passes::collect_intra_doc_links::LinkCollector as rustdoc[2368e8ab35c11ae8]::visit::DocVisitor>::visit_item
  29:     0x55bbb4473bbc - rustdoc[2368e8ab35c11ae8]::passes::collect_intra_doc_links::collect_intra_doc_links
  30:     0x55bbb42ccf54 - <rustc_session[8df92abe178df33c]::session::Session>::time::<rustdoc[2368e8ab35c11ae8]::clean::types::Crate, rustdoc[2368e8ab35c11ae8]::core::run_global_ctxt::{closure#8}>
  31:     0x55bbb452d90d - rustdoc[2368e8ab35c11ae8]::core::run_global_ctxt
  32:     0x55bbb42cd3c2 - <rustc_session[8df92abe178df33c]::session::Session>::time::<(rustdoc[2368e8ab35c11ae8]::clean::types::Crate, rustdoc[2368e8ab35c11ae8]::config::RenderOptions, rustdoc[2368e8ab35c11ae8]::formats::cache::Cache), rustdoc[2368e8ab35c11ae8]::main_options::{closure#0}::{closure#0}::{closure#1}::{closure#0}>
  33:     0x55bbb4588be6 - <rustc_interface[550884b2b179878f]::passes::QueryContext>::enter::<rustdoc[2368e8ab35c11ae8]::main_options::{closure#0}::{closure#0}::{closure#1}, core[a3420257622cd381]::result::Result<(), rustc_errors[a7dbbf867eaca825]::ErrorGuaranteed>>
  34:     0x55bbb448e41b - rustc_interface[550884b2b179878f]::interface::create_compiler_and_run::<core[a3420257622cd381]::result::Result<(), rustc_errors[a7dbbf867eaca825]::ErrorGuaranteed>, rustdoc[2368e8ab35c11ae8]::main_options::{closure#0}>
  35:     0x55bbb43007d3 - rustdoc[2368e8ab35c11ae8]::main_options
  36:     0x55bbb4313d2b - <scoped_tls[7ed3ce20ede545d8]::ScopedKey<rustc_span[7238ca7210ca999e]::SessionGlobals>>::set::<rustdoc[2368e8ab35c11ae8]::main_args::{closure#0}, core[a3420257622cd381]::result::Result<(), rustc_errors[a7dbbf867eaca825]::ErrorGuaranteed>>
  37:     0x55bbb445d93f - std[3b302b3c9093c22]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[550884b2b179878f]::util::run_in_thread_pool_with_globals<rustdoc[2368e8ab35c11ae8]::main_args::{closure#0}, core[a3420257622cd381]::result::Result<(), rustc_errors[a7dbbf867eaca825]::ErrorGuaranteed>>::{closure#0}, core[a3420257622cd381]::result::Result<(), rustc_errors[a7dbbf867eaca825]::ErrorGuaranteed>>
  38:     0x55bbb454c869 - <<std[3b302b3c9093c22]::thread::Builder>::spawn_unchecked_<rustc_interface[550884b2b179878f]::util::run_in_thread_pool_with_globals<rustdoc[2368e8ab35c11ae8]::main_args::{closure#0}, core[a3420257622cd381]::result::Result<(), rustc_errors[a7dbbf867eaca825]::ErrorGuaranteed>>::{closure#0}, core[a3420257622cd381]::result::Result<(), rustc_errors[a7dbbf867eaca825]::ErrorGuaranteed>>::{closure#1} as core[a3420257622cd381]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  39:     0x7ff9786abbf3 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::ha99802c2c52ada61
                               at /rustc/fe5b13d681f25ee6474be29d748c65adcd91f69e/library/alloc/src/boxed.rs:1861:9
  40:     0x7ff9786abbf3 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::ha39aea1c57e28a15
                               at /rustc/fe5b13d681f25ee6474be29d748c65adcd91f69e/library/alloc/src/boxed.rs:1861:9
  41:     0x7ff9786abbf3 - std::sys::unix::thread::Thread::new::thread_start::h9f8e3d72b1f7662f
                               at /rustc/fe5b13d681f25ee6474be29d748c65adcd91f69e/library/std/src/sys/unix/thread.rs:108:17
  42:     0x7ff978385b43 - start_thread
                               at ./nptl/./nptl/pthread_create.c:442:8
  43:     0x7ff978417a00 - clone3
                               at ./misc/../sysdeps/unix/sysv/linux/x86_64/clone3.S:81
  44:                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 1.61.0 (fe5b13d68 2022-05-18) running on x86_64-unknown-linux-gnu

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 `polkadot-node-subsystem`

Caused by:
  process didn't exit successfully: `rustdoc --edition=2021 --crate-type lib --crate-name polkadot_node_subsystem node/subsystem/src/lib.rs -o ./polkadot/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat -C metadata=49b872d20c6cb053 -L dependency=./polkadot/target/debug/deps --extern polkadot_node_jaeger=./polkadot/target/debug/deps/libpolkadot_node_jaeger-7a85134452f9ab9b.rmeta --extern polkadot_node_subsystem_types=./polkadot/target/debug/deps/libpolkadot_node_subsystem_types-ee48f2698c5c4dc1.rmeta --extern polkadot_overseer=./polkadot/target/debug/deps/libpolkadot_overseer-891b0bfc52420e3b.rmeta --crate-version 0.9.23` (exit status: 101)

Backtrace

same as above

[bkchr]

Did you try the latest nightly?

[GuillaumeGomez]

cc @petrochenkov

[VictorKoenders]

This seems to still be an issue in rustc 1.62.0 (a8314ef7d 2022-06-27) running on x86_64-pc-windows-msvc

[petrochenkov]

I cannot reproduce this issue on Rust 1.62.1 or on Rust Nightly, closing the issue.
I didn't bisect in more detail because polkadot requires enormous amount of time to document (its dependency tree is about 2000 crates).

If you have a specific commit of polkadot and Rust version that reproduce this issue, please reopen it (or create a new one).