cargo doc ICE on minimal crate w/ cargo 1.69.0 (6e9a83356 2023-04-12)

[nathan-at-least]

Code

This is a crate with no code; src/lib.rs is an empty file.

Reproduction steps:

1. I encountered the cargo doc while developing a branch new crate.
2. I then did a cp -a on the crate to a new reproduction directory.
3. In the repro dir I reset git: rm -rf .git; git init; git add . to track repro changes carefully.
4. I created cargo_1_69_0_doc_ice_repro so rust-lang devs can hopefully reproduce locally.
5. I verified the crash reproduction with cargo doc.
6. I removed all code leaving an empty ./src/lib.rs, then re-verified the crash with cargo doc.
7. I removed build artifacts, then reproduced: rm -r ./target then cargo doc.
8. I saved the output of cargo doc for this ticket below.

Meta

rustc --version --verbose:

rustc 1.69.0 (84c898d65 2023-04-16)
binary: rustc
commit-hash: 84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc
commit-date: 2023-04-16
host: x86_64-unknown-linux-gnu
release: 1.69.0
LLVM version: 15.0.7

Error output

$ cargo doc 
 Documenting rustix v0.36.9
thread 'rustc' panicked at 'no resolutions for a doc link', compiler/rustc_metadata/src/rmeta/encoder.rs:2228:18
stack backtrace:
   0:     0x7c7d9119431a - std::backtrace_rs::backtrace::libunwind::trace::ha9053a9a07ca49cb
                               at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
   1:     0x7c7d9119431a - std::backtrace_rs::backtrace::trace_unsynchronized::h9c2852a457ad564e
                               at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x7c7d9119431a - std::sys_common::backtrace::_print_fmt::h457936fbfaa0070f
                               at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/sys_common/backtrace.rs:65:5
   3:     0x7c7d9119431a - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h5779d7bf7f70cb0c
                               at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/sys_common/backtrace.rs:44:22
   4:     0x7c7d911f7b6e - core::fmt::write::h5a4baaff1bcd3eb5
                               at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/core/src/fmt/mod.rs:1232:17
   5:     0x7c7d911872c5 - std::io::Write::write_fmt::h4bc1f301cb9e9cce
                               at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/io/mod.rs:1684:15
   6:     0x7c7d911940e5 - std::sys_common::backtrace::_print::h5fcdc36060f177e8
                               at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/sys_common/backtrace.rs:47:5
   7:     0x7c7d911940e5 - std::sys_common::backtrace::print::h54ca9458b876c8bf
                               at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/sys_common/backtrace.rs:34:9
   8:     0x7c7d91196e5f - std::panicking::default_hook::{{closure}}::hbe471161c7664ed6
                               at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/panicking.rs:271:22
   9:     0x7c7d91196b9b - std::panicking::default_hook::ha3500da57aa4ac4f
                               at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/panicking.rs:290:9
  10:     0x7c7d943f88b5 - <rustc_driver_impl[fb92b3e21ac03dce]::DEFAULT_HOOK::{closure#0}::{closure#0} as core[911a585bea10363d]::ops::function::FnOnce<(&core[911a585bea10363d]::panic::panic_info::PanicInfo,)>>::call_once::{shim:vtable#0}
  11:     0x7c7d9119769d - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h6507bddc3eebb4a5
                               at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/alloc/src/boxed.rs:2001:9
  12:     0x7c7d9119769d - std::panicking::rust_panic_with_hook::h50c09d000dc561d2
                               at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/panicking.rs:696:13
  13:     0x7c7d91197419 - std::panicking::begin_panic_handler::{{closure}}::h9e2b2176e00e0d9c
                               at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/panicking.rs:583:13
  14:     0x7c7d91194786 - std::sys_common::backtrace::__rust_end_short_backtrace::h5739b8e512c09d02
                               at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/sys_common/backtrace.rs:150:18
  15:     0x7c7d91197122 - rust_begin_unwind
                               at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/panicking.rs:579:5
  16:     0x7c7d911f3ec3 - core::panicking::panic_fmt::hf33a1475b4dc5c3e
                               at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/core/src/panicking.rs:64:14
  17:     0x7c7d911f4031 - core::panicking::panic_display::ha103dd28e5023b08
                               at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/core/src/panicking.rs:147:5
  18:     0x7c7d911f3fdb - core::panicking::panic_str::h940bf021f492dc8c
                               at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/core/src/panicking.rs:131:5
  19:     0x7c7d911f3c46 - core::option::expect_failed::h09b982639336e7ea
                               at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/core/src/option.rs:2045:5
  20:     0x7c7d948c3b77 - <rustc_metadata[29cf5a64f33334d8]::rmeta::encoder::provide::{closure#0} as core[911a585bea10363d]::ops::function::FnOnce<(rustc_middle[1a4ce3311a146f18]::ty::context::TyCtxt, rustc_span[fab0eb11f1fed58d]::def_id::DefId)>>::call_once
  21:     0x7c7d94ccc3ad - rustc_query_system[caf472e4bac2b2b6]::query::plumbing::try_execute_query::<rustc_query_impl[a4bd04fc7a0236b8]::queries::doc_link_resolutions, rustc_query_impl[a4bd04fc7a0236b8]::plumbing::QueryCtxt>
  22:     0x7c7d94d4d7cd - <rustc_query_impl[a4bd04fc7a0236b8]::Queries as rustc_middle[1a4ce3311a146f18]::ty::query::QueryEngine>::doc_link_resolutions
  23:     0x5adfda56f498 - <rustdoc[483c6e22976f34cb]::passes::collect_intra_doc_links::LinkCollector>::resolve_path
  24:     0x5adfda56f74e - <rustdoc[483c6e22976f34cb]::passes::collect_intra_doc_links::LinkCollector>::resolve
  25:     0x5adfda573364 - <rustdoc[483c6e22976f34cb]::passes::collect_intra_doc_links::LinkCollector as rustdoc[483c6e22976f34cb]::visit::DocVisitor>::visit_item
  26:     0x5adfda57c67a - <rustdoc[483c6e22976f34cb]::passes::collect_intra_doc_links::LinkCollector as rustdoc[483c6e22976f34cb]::visit::DocVisitor>::visit_inner_recur
  27:     0x5adfda576a7c - <rustdoc[483c6e22976f34cb]::passes::collect_intra_doc_links::LinkCollector as rustdoc[483c6e22976f34cb]::visit::DocVisitor>::visit_item
  28:     0x5adfda57c67a - <rustdoc[483c6e22976f34cb]::passes::collect_intra_doc_links::LinkCollector as rustdoc[483c6e22976f34cb]::visit::DocVisitor>::visit_inner_recur
  29:     0x5adfda576a7c - <rustdoc[483c6e22976f34cb]::passes::collect_intra_doc_links::LinkCollector as rustdoc[483c6e22976f34cb]::visit::DocVisitor>::visit_item
  30:     0x5adfda56e0a2 - rustdoc[483c6e22976f34cb]::passes::collect_intra_doc_links::collect_intra_doc_links
  31:     0x5adfda4b632e - <rustc_session[b87ece769e9b9511]::session::Session>::time::<rustdoc[483c6e22976f34cb]::clean::types::Crate, rustdoc[483c6e22976f34cb]::core::run_global_ctxt::{closure#7}>
  32:     0x5adfda5e1dd0 - rustdoc[483c6e22976f34cb]::core::run_global_ctxt
  33:     0x5adfda4b65b9 - <rustc_session[b87ece769e9b9511]::session::Session>::time::<(rustdoc[483c6e22976f34cb]::clean::types::Crate, rustdoc[483c6e22976f34cb]::config::RenderOptions, rustdoc[483c6e22976f34cb]::formats::cache::Cache), rustdoc[483c6e22976f34cb]::main_args::{closure#1}::{closure#0}::{closure#0}::{closure#0}>
  34:     0x5adfda3b4d57 - <rustc_middle[1a4ce3311a146f18]::ty::context::GlobalCtxt>::enter::<rustdoc[483c6e22976f34cb]::main_args::{closure#1}::{closure#0}::{closure#0}, core[911a585bea10363d]::result::Result<(), rustc_span[fab0eb11f1fed58d]::ErrorGuaranteed>>
  35:     0x5adfda41ffce - rustc_span[fab0eb11f1fed58d]::with_source_map::<core[911a585bea10363d]::result::Result<(), rustc_span[fab0eb11f1fed58d]::ErrorGuaranteed>, rustc_interface[bd8390756bd7a52a]::interface::run_compiler<core[911a585bea10363d]::result::Result<(), rustc_span[fab0eb11f1fed58d]::ErrorGuaranteed>, rustdoc[483c6e22976f34cb]::main_args::{closure#1}>::{closure#0}::{closure#0}>
  36:     0x5adfda392474 - <scoped_tls[473f62cd2eff9842]::ScopedKey<rustc_span[fab0eb11f1fed58d]::SessionGlobals>>::set::<rustc_interface[bd8390756bd7a52a]::interface::run_compiler<core[911a585bea10363d]::result::Result<(), rustc_span[fab0eb11f1fed58d]::ErrorGuaranteed>, rustdoc[483c6e22976f34cb]::main_args::{closure#1}>::{closure#0}, core[911a585bea10363d]::result::Result<(), rustc_span[fab0eb11f1fed58d]::ErrorGuaranteed>>
  37:     0x5adfda4cd9a0 - std[685882fd5f6d52e5]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[bd8390756bd7a52a]::util::run_in_thread_pool_with_globals<rustc_interface[bd8390756bd7a52a]::interface::run_compiler<core[911a585bea10363d]::result::Result<(), rustc_span[fab0eb11f1fed58d]::ErrorGuaranteed>, rustdoc[483c6e22976f34cb]::main_args::{closure#1}>::{closure#0}, core[911a585bea10363d]::result::Result<(), rustc_span[fab0eb11f1fed58d]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[911a585bea10363d]::result::Result<(), rustc_span[fab0eb11f1fed58d]::ErrorGuaranteed>>
  38:     0x5adfda5981dd - <<std[685882fd5f6d52e5]::thread::Builder>::spawn_unchecked_<rustc_interface[bd8390756bd7a52a]::util::run_in_thread_pool_with_globals<rustc_interface[bd8390756bd7a52a]::interface::run_compiler<core[911a585bea10363d]::result::Result<(), rustc_span[fab0eb11f1fed58d]::ErrorGuaranteed>, rustdoc[483c6e22976f34cb]::main_args::{closure#1}>::{closure#0}, core[911a585bea10363d]::result::Result<(), rustc_span[fab0eb11f1fed58d]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[911a585bea10363d]::result::Result<(), rustc_span[fab0eb11f1fed58d]::ErrorGuaranteed>>::{closure#1} as core[911a585bea10363d]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  39:     0x7c7d911a1593 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h39990b24eedef2ab
                               at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/alloc/src/boxed.rs:1987:9
  40:     0x7c7d911a1593 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h01a027258444143b
                               at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/alloc/src/boxed.rs:1987:9
  41:     0x7c7d911a1593 - std::sys::unix::thread::Thread::new::thread_start::ha4f1cdd9c25884ba
                               at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/sys/unix/thread.rs:108:17
  42:     0x7c7d9103dea7 - start_thread
  43:     0x7c7d90f5da2f - clone
  44:                0x0 - <unknown>

error: 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 1.69.0 (84c898d65 2023-04-16) 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:
#0 [doc_link_resolutions] resolutions for documentation links for a module
end of query stack
error: could not document `rustix`

Caused by:
  process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name rustix /home/user/.cargo/registry/src/github.com-1ecc6299db9ec823/rustix-0.36.9/src/lib.rs --cap-lints allow -o /home/user/hack/rust-doc-ice-2023-04-25/target/doc --cfg 'feature="default"' --cfg 'feature="io-lifetimes"' --cfg 'feature="libc"' --cfg 'feature="std"' --cfg 'feature="termios"' --cfg 'feature="use-libc-auxv"' --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --diagnostic-width=194 -C metadata=68c48281f8d51e01 -L dependency=/home/user/hack/rust-doc-ice-2023-04-25/target/debug/deps --extern bitflags=/home/user/hack/rust-doc-ice-2023-04-25/target/debug/deps/libbitflags-1a1c34f79f6e612c.rmeta --extern io_lifetimes=/home/user/hack/rust-doc-ice-2023-04-25/target/debug/deps/libio_lifetimes-cd6be4f8fe3b4bc6.rmeta --extern libc=/home/user/hack/rust-doc-ice-2023-04-25/target/debug/deps/liblibc-25f8caa1cd741fae.rmeta --extern linux_raw_sys=/home/user/hack/rust-doc-ice-2023-04-25/target/debug/deps/liblinux_raw_sys-a98848148f479f38.rmeta --crate-version 0.36.9 --cfg linux_raw` (exit status: 101)

Note that cargo build succeeds! Seems like an important symptom detail:

Backtrace

$ RUST_BACKTRACE=1 cargo build
   Compiling libc v0.2.139
   Compiling bitflags v1.3.2
   Compiling linux-raw-sys v0.1.4
   Compiling os_str_bytes v6.4.1
   Compiling once_cell v1.17.1
   Compiling clap_lex v0.3.2
   Compiling strsim v0.10.0
   Compiling termcolor v1.2.0
   Compiling io-lifetimes v1.0.5
   Compiling dirs-sys v0.3.7
   Compiling rustix v0.36.9
   Compiling dirs v4.0.0
   Compiling is-terminal v0.4.4
   Compiling clap v4.1.8
   Compiling rust-doc-ice-repro-2023-04-25 v0.1.0 (/home/user/hack/rust-doc-ice-2023-04-25)
    Finished dev [unoptimized + debuginfo] target(s) in 7.83s

[clubby789]

Duplicate of #110720 (and friends) - rustix 0.36.x causes Rustdoc to ICE. This has been fixed and will land in 1.70.0. You can probably work around this by updating your dependencies, as the offending line in Rustix has since been removed