ICE in rustdoc intra-doc link

[GuillaumeGomez]

We just got this ICE in gtk-rs CI. The same code didn't crash with yesterday's nightly so the bug appeared in the meantime.

warning: unresolved link to `crate::glib::Bytes::new_from_bytes`
Warning:    --> gio/src/auto/output_stream.rs:336:66
    |
336 |     /// remaining bytes, using [`glib::Bytes::new_from_bytes()`][crate::glib::Bytes::new_from_bytes()]. Passing the same
    |                                                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the struct `Bytes` has no function named `new_from_bytes`

thread 'rustc' panicked at 'internal error: entered unreachable code', compiler/rustc_resolve/src/lib.rs:3302:67
stack backtrace:
   0:     0x7fb26460adbd - std::backtrace_rs::backtrace::libunwind::trace::hed55b2655d2d24d4
                               at /rustc/306ba8357fb36212b7d30efb9eb9e41659ac1445/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
   1:     0x7fb26460adbd - std::backtrace_rs::backtrace::trace_unsynchronized::hdb09b6d01f28fc36
                               at /rustc/306ba8357fb36212b7d30efb9eb9e41659ac1445/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x7fb26460adbd - std::sys_common::backtrace::_print_fmt::h85d73dd15e59a966
                               at /rustc/306ba8357fb36212b7d30efb9eb9e41659ac1445/library/std/src/sys_common/backtrace.rs:66:5
   3:     0x7fb26460adbd - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h467642c35f832dfc
                               at /rustc/306ba8357fb36212b7d30efb9eb9e41659ac1445/library/std/src/sys_common/backtrace.rs:45:22
   4:     0x7fb264664bfc - core::fmt::write::h80ceeb54ece7aa73
                               at /rustc/306ba8357fb36212b7d30efb9eb9e41659ac1445/library/core/src/fmt/mod.rs:1194:17
   5:     0x7fb2645fc671 - std::io::Write::write_fmt::hdad4cd8743ef8ba3
                               at /rustc/306ba8357fb36212b7d30efb9eb9e41659ac1445/library/std/src/io/mod.rs:1655:15
   6:     0x7fb26460dce5 - std::sys_common::backtrace::_print::h7e8d4c312968a3a4
                               at /rustc/306ba8357fb36212b7d30efb9eb9e41659ac1445/library/std/src/sys_common/backtrace.rs:48:5
   7:     0x7fb26460dce5 - std::sys_common::backtrace::print::he2f3552019b2ee9b
                               at /rustc/306ba8357fb36212b7d30efb9eb9e41659ac1445/library/std/src/sys_common/backtrace.rs:35:9
   8:     0x7fb26460dce5 - std::panicking::default_hook::{{closure}}::hf0781cd99cbd97bb
                               at /rustc/306ba8357fb36212b7d30efb9eb9e41659ac1445/library/std/src/panicking.rs:295:22
   9:     0x7fb26460d959 - std::panicking::default_hook::h3afb6754f35bb197
                               at /rustc/306ba8357fb36212b7d30efb9eb9e41659ac1445/library/std/src/panicking.rs:314:9
  10:     0x7fb264dad2b1 - rustc_driver[7757471c23bcdd79]::DEFAULT_HOOK::{closure#0}::{closure#0}
  11:     0x7fb25118b173 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h01e81fd5d18e9102
                               at /rustc/306ba8357fb36212b7d30efb9eb9e41659ac1445/library/alloc/src/boxed.rs:1875:9
  12:     0x7fb25121f97c - proc_macro::bridge::client::<impl proc_macro::bridge::Bridge>::enter::{{closure}}::{{closure}}::hf457e8ffb40247bf
                               at /rustc/306ba8357fb36212b7d30efb9eb9e41659ac1445/library/proc_macro/src/bridge/client.rs:319:21
  13:     0x7fb251196f40 - std::panicking::update_hook::{{closure}}::h26ac063aae77af5d
                               at /rustc/306ba8357fb36212b7d30efb9eb9e41659ac1445/library/std/src/panicking.rs:258:41
  14:     0x7fb26460e480 - std::panicking::rust_panic_with_hook::he026b558348e638c
                               at /rustc/306ba8357fb36212b7d30efb9eb9e41659ac1445/library/std/src/panicking.rs:702:17
  15:     0x7fb26460e279 - std::panicking::begin_panic_handler::{{closure}}::h7d8266517b3a97b3
                               at /rustc/306ba8357fb36212b7d30efb9eb9e41659ac1445/library/std/src/panicking.rs:586:13
  16:     0x7fb26460b274 - std::sys_common::backtrace::__rust_end_short_backtrace::hd820e490164f416e
                               at /rustc/306ba8357fb36212b7d30efb9eb9e41659ac1445/library/std/src/sys_common/backtrace.rs:138:18
  17:     0x7fb26460dfe9 - rust_begin_unwind
                               at /rustc/306ba8357fb36212b7d30efb9eb9e41659ac1445/library/std/src/panicking.rs:584:5
  18:     0x7fb2645d2603 - core::panicking::panic_fmt::h8045f7299830fe26
                               at /rustc/306ba8357fb36212b7d30efb9eb9e41659ac1445/library/core/src/panicking.rs:143:14
  19:     0x7fb2645d24cd - core::panicking::panic::heafaed44edc5d2f0
                               at /rustc/306ba8357fb36212b7d30efb9eb9e41659ac1445/library/core/src/panicking.rs:48:5
  20:     0x7fb265201bac - <rustc_resolve[63bbea3e439f8aba]::Resolver>::resolve_rustdoc_path
  21:     0x55e6180fddb0 - <rustdoc[4dafd65c5212ebd7]::core::DocContext>::enter_resolver::<<rustdoc[4dafd65c5212ebd7]::passes::collect_intra_doc_links::LinkCollector>::resolve_path::{closure#0}, core[93896c7deb4583e1]::option::Option<rustc_hir[f54027a8bc11733a]::def::Res<rustc_ast[6b1b21165e8c3805]::node_id::NodeId>>>
  22:     0x55e6180b8a87 - <rustdoc[4dafd65c5212ebd7]::passes::collect_intra_doc_links::LinkCollector>::resolve_path
  23:     0x55e6180b96e7 - <rustdoc[4dafd65c5212ebd7]::passes::collect_intra_doc_links::LinkCollector>::resolve
  24:     0x55e6180bf623 - <rustdoc[4dafd65c5212ebd7]::passes::collect_intra_doc_links::LinkCollector as rustdoc[4dafd65c5212ebd7]::visit::DocVisitor>::visit_item
  25:     0x55e6180cc8ca - <rustdoc[4dafd65c5212ebd7]::passes::collect_intra_doc_links::LinkCollector as rustdoc[4dafd65c5212ebd7]::visit::DocVisitor>::visit_inner_recur
  26:     0x55e6180c2d16 - <rustdoc[4dafd65c5212ebd7]::passes::collect_intra_doc_links::LinkCollector as rustdoc[4dafd65c5212ebd7]::visit::DocVisitor>::visit_item
  27:     0x55e6180cc88a - <rustdoc[4dafd65c5212ebd7]::passes::collect_intra_doc_links::LinkCollector as rustdoc[4dafd65c5212ebd7]::visit::DocVisitor>::visit_inner_recur
  28:     0x55e6180c2cf4 - <rustdoc[4dafd65c5212ebd7]::passes::collect_intra_doc_links::LinkCollector as rustdoc[4dafd65c5212ebd7]::visit::DocVisitor>::visit_item
  29:     0x55e6180cc88a - <rustdoc[4dafd65c5212ebd7]::passes::collect_intra_doc_links::LinkCollector as rustdoc[4dafd65c5212ebd7]::visit::DocVisitor>::visit_inner_recur
  30:     0x55e6180c2cf4 - <rustdoc[4dafd65c5212ebd7]::passes::collect_intra_doc_links::LinkCollector as rustdoc[4dafd65c5212ebd7]::visit::DocVisitor>::visit_item
  31:     0x55e6180b7f5c - rustdoc[4dafd65c5212ebd7]::passes::collect_intra_doc_links::collect_intra_doc_links
  32:     0x55e6180d2602 - <rustc_session[93cf466beccfe173]::session::Session>::time::<(rustdoc[4dafd65c5212ebd7]::clean::types::Crate, rustdoc[4dafd65c5212ebd7]::config::RenderOptions, rustdoc[4dafd65c5212ebd7]::formats::cache::Cache), rustdoc[4dafd65c5212ebd7]::main_options::{closure#0}::{closure#0}::{closure#1}::{closure#0}>
  33:     0x55e618161496 - <rustc_interface[3aa5dcd3b29cadd6]::passes::QueryContext>::enter::<rustdoc[4dafd65c5212ebd7]::main_options::{closure#0}::{closure#0}::{closure#1}, core[93896c7deb4583e1]::result::Result<(), rustc_errors[46e0f1031c6d896b]::ErrorGuaranteed>>
  34:     0x55e61805c229 - <rustc_interface[3aa5dcd3b29cadd6]::interface::Compiler>::enter::<rustdoc[4dafd65c5212ebd7]::main_options::{closure#0}::{closure#0}, core[93896c7deb4583e1]::result::Result<(), rustc_errors[46e0f1031c6d896b]::ErrorGuaranteed>>
  35:     0x55e617ecb936 - rustc_span[783d01233175f916]::with_source_map::<core[93896c7deb4583e1]::result::Result<(), rustc_errors[46e0f1031c6d896b]::ErrorGuaranteed>, rustc_interface[3aa5dcd3b29cadd6]::interface::create_compiler_and_run<core[93896c7deb4583e1]::result::Result<(), rustc_errors[46e0f1031c6d896b]::ErrorGuaranteed>, rustdoc[4dafd65c5212ebd7]::main_options::{closure#0}>::{closure#1}>
  36:     0x55e61805e9d4 - rustc_interface[3aa5dcd3b29cadd6]::interface::create_compiler_and_run::<core[93896c7deb4583e1]::result::Result<(), rustc_errors[46e0f1031c6d896b]::ErrorGuaranteed>, rustdoc[4dafd65c5212ebd7]::main_options::{closure#0}>
  37:     0x55e617ee6e9b - rustdoc[4dafd65c5212ebd7]::main_options
  38:     0x55e617f0eadb - <scoped_tls[be19827943045dee]::ScopedKey<rustc_span[783d01233175f916]::SessionGlobals>>::set::<rustdoc[4dafd65c5212ebd7]::main_args::{closure#0}, core[93896c7deb4583e1]::result::Result<(), rustc_errors[46e0f1031c6d896b]::ErrorGuaranteed>>
  39:     0x55e6180842af - std[be2b2098f2565a09]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[3aa5dcd3b29cadd6]::util::run_in_thread_pool_with_globals<rustdoc[4dafd65c5212ebd7]::main_args::{closure#0}, core[93896c7deb4583e1]::result::Result<(), rustc_errors[46e0f1031c6d896b]::ErrorGuaranteed>>::{closure#0}, core[93896c7deb4583e1]::result::Result<(), rustc_errors[46e0f1031c6d896b]::ErrorGuaranteed>>
  40:     0x55e61811ee69 - <<std[be2b2098f2565a09]::thread::Builder>::spawn_unchecked_<rustc_interface[3aa5dcd3b29cadd6]::util::run_in_thread_pool_with_globals<rustdoc[4dafd65c5212ebd7]::main_args::{closure#0}, core[93896c7deb4583e1]::result::Result<(), rustc_errors[46e0f1031c6d896b]::ErrorGuaranteed>>::{closure#0}, core[93896c7deb4583e1]::result::Result<(), rustc_errors[46e0f1031c6d896b]::ErrorGuaranteed>>::{closure#1} as core[93896c7deb4583e1]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  41:     0x7fb264618553 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h5e2ec464c6633a37
                               at /rustc/306ba8357fb36212b7d30efb9eb9e41659ac1445/library/alloc/src/boxed.rs:1861:9
  42:     0x7fb264618553 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h0630748fae134b06
                               at /rustc/306ba8357fb36212b7d30efb9eb9e41659ac1445/library/alloc/src/boxed.rs:1861:9
  43:     0x7fb264618553 - std::sys::unix::thread::Thread::new::thread_start::h9400fecba0bc7090
                               at /rustc/306ba8357fb36212b7d30efb9eb9e41659ac1445/library/std/src/sys/unix/thread.rs:108:17
  44:     0x7fb26454c590 - start_thread
  45:     0x7fb2642f5223 - clone
  46:                0x0 - <unknown>

error: internal compiler error: unexpected panic
Error: internal compiler error: unexpected panic
note: the compiler unexpectedly panicked. this is a bug.

I'll try to make a minimum reproducible case as soon as possible.

Maybe it's linked to our recent changes @petrochenkov ?

[petrochenkov]

This should be fixed by #95681.
Could you check whether that commit exists in the compiler branch that you are testing?

[GuillaumeGomez]

Even simpler: we can just re-check with tomorrow's nightly. :)

[GuillaumeGomez]

It was fixed by #95681. Closing it then.