[INFO] fetching crate exact-covers 0.3.0... [INFO] documenting exact-covers-0.3.0 against try#a394c9cd9ec93787f09a7ac445b14cc674a94549 for pr-151918 [INFO] extracting crate exact-covers 0.3.0 into /workspace/builds/worker-3-tc2/source [INFO] started tweaking crates.io crate exact-covers 0.3.0 [INFO] removed 0 missing examples [INFO] finished tweaking crates.io crate exact-covers 0.3.0 [INFO] tweaked toml for crates.io crate exact-covers 0.3.0 written to /workspace/builds/worker-3-tc2/source/Cargo.toml [INFO] validating manifest of crates.io crate exact-covers 0.3.0 on toolchain a394c9cd9ec93787f09a7ac445b14cc674a94549 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a394c9cd9ec93787f09a7ac445b14cc674a94549" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] crate crates.io crate exact-covers 0.3.0 already has a lockfile, it will not be regenerated [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a394c9cd9ec93787f09a7ac445b14cc674a94549" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:29356a839a4d14451438f794ce8414e707d72405f44418718d724d22562fe786" "/opt/rustwide/cargo-home/bin/cargo" "+a394c9cd9ec93787f09a7ac445b14cc674a94549" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 83ee0aab781c02b4f7dcd884b8fefa33ecb61ee9697a4c7497b2dbd04467d181 [INFO] running `Command { std: "docker" "start" "-a" "83ee0aab781c02b4f7dcd884b8fefa33ecb61ee9697a4c7497b2dbd04467d181", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "83ee0aab781c02b4f7dcd884b8fefa33ecb61ee9697a4c7497b2dbd04467d181", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "83ee0aab781c02b4f7dcd884b8fefa33ecb61ee9697a4c7497b2dbd04467d181", kill_on_drop: false }` [INFO] [stdout] 83ee0aab781c02b4f7dcd884b8fefa33ecb61ee9697a4c7497b2dbd04467d181 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:29356a839a4d14451438f794ce8414e707d72405f44418718d724d22562fe786" "/opt/rustwide/cargo-home/bin/cargo" "+a394c9cd9ec93787f09a7ac445b14cc674a94549" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 7d86556441c11dbf9c33120e0d479035885dec3c603891760c6fc530c3aafa68 [INFO] running `Command { std: "docker" "start" "-a" "7d86556441c11dbf9c33120e0d479035885dec3c603891760c6fc530c3aafa68", kill_on_drop: false }` [INFO] [stderr] Documenting exact-covers v0.3.0 (/opt/rustwide/workdir) [INFO] [stderr] [INFO] [stderr] thread 'rustc' (25) panicked at src/librustdoc/html/markdown.rs:534:22: [INFO] [stderr] a production-ready version of this should handle the error somehow: LatexError(0, UnknownCommand("`")) [INFO] [stderr] stack backtrace: [INFO] [stderr] 0: 0x7ecd2d446d9b - <::print::DisplayBacktrace as core[37ab4a9f28f6fd13]::fmt::Display>::fmt [INFO] [stderr] 1: 0x7ecd2da0ef88 - core[37ab4a9f28f6fd13]::fmt::write [INFO] [stderr] 2: 0x7ecd2d45dc36 - ::write_fmt [INFO] [stderr] 3: 0x7ecd2d41ce48 - std[6281e874092a0dfc]::panicking::default_hook::{closure#0} [INFO] [stderr] 4: 0x7ecd2d43a163 - std[6281e874092a0dfc]::panicking::default_hook [INFO] [stderr] 5: 0x7ecd2c40ff8d - std[6281e874092a0dfc]::panicking::update_hook::>::{closure#0} [INFO] [stderr] 6: 0x7ecd2d43a442 - std[6281e874092a0dfc]::panicking::panic_with_hook [INFO] [stderr] 7: 0x7ecd2d41cf08 - std[6281e874092a0dfc]::panicking::panic_handler::{closure#0} [INFO] [stderr] 8: 0x7ecd2d411479 - std[6281e874092a0dfc]::sys::backtrace::__rust_end_short_backtrace:: [INFO] [stderr] 9: 0x7ecd2d41e96d - __rustc[670611b3f56fc7d7]::rust_begin_unwind [INFO] [stderr] 10: 0x7ecd2a0ce58c - core[37ab4a9f28f6fd13]::panicking::panic_fmt [INFO] [stderr] 11: 0x7ecd29d88b72 - core[37ab4a9f28f6fd13]::result::unwrap_failed [INFO] [stderr] 12: 0x63b6d180151e - ::into_iter::{closure#0}>>>>, ::into_iter::{closure#1}::{closure#0}>>> as core[37ab4a9f28f6fd13]::iter::traits::iterator::Iterator>::next [INFO] [stderr] 13: 0x63b6d1797c16 - ::into_iter::{closure#0}>>>>, ::into_iter::{closure#1}::{closure#0}>>>> as core[37ab4a9f28f6fd13]::iter::traits::iterator::Iterator>::next [INFO] [stderr] 14: 0x63b6d15fd493 - ::into_iter::{closure#0}>>>>, ::into_iter::{closure#1}::{closure#0}>>>>, pulldown_cmark_escape[cb8658d251f4e39e]::FmtWriter<&mut core[37ab4a9f28f6fd13]::fmt::Formatter>>>::run [INFO] [stderr] 15: 0x63b6d144cb80 - ::write_into::<&mut core[37ab4a9f28f6fd13]::fmt::Formatter> [INFO] [stderr] 16: 0x63b6d17f0521 - as core[37ab4a9f28f6fd13]::fmt::Display>::fmt [INFO] [stderr] 17: 0x7ecd2da0ef88 - core[37ab4a9f28f6fd13]::fmt::write [INFO] [stderr] 18: 0x63b6d17f155a - as core[37ab4a9f28f6fd13]::fmt::Display>::fmt [INFO] [stderr] 19: 0x7ecd2da0ef88 - core[37ab4a9f28f6fd13]::fmt::write [INFO] [stderr] 20: 0x63b6d17f25a5 - as core[37ab4a9f28f6fd13]::fmt::Display>::fmt [INFO] [stderr] 21: 0x7ecd2da0ef88 - core[37ab4a9f28f6fd13]::fmt::write [INFO] [stderr] 22: 0x63b6d15d88f0 - rustdoc[7f40747ea455e46f]::html::render::print_item::item_trait::{closure#0} [INFO] [stderr] 23: 0x7ecd2da0ef88 - core[37ab4a9f28f6fd13]::fmt::write [INFO] [stderr] 24: 0x63b6d14e8baa - rustdoc[7f40747ea455e46f]::html::layout::render::, core[37ab4a9f28f6fd13]::fmt::builders::FromFn<::render_item::{closure#1}>> [INFO] [stderr] 25: 0x63b6d163cb85 - ::render_item [INFO] [stderr] 26: 0x63b6d17d7a5e - ::item [INFO] [stderr] 27: 0x63b6d14f1adc - rustdoc[7f40747ea455e46f]::formats::renderer::run_format_inner:: [INFO] [stderr] 28: 0x63b6d14f1c8f - rustdoc[7f40747ea455e46f]::formats::renderer::run_format_inner:: [INFO] [stderr] 29: 0x63b6d15ba39f - rustdoc[7f40747ea455e46f]::main_args::{closure#2}::{closure#0} [INFO] [stderr] 30: 0x63b6d15ae100 - rustc_interface[7c235db06cadd779]::interface::run_compiler::<(), rustdoc[7f40747ea455e46f]::main_args::{closure#2}>::{closure#1} [INFO] [stderr] 31: 0x63b6d14e7078 - std[6281e874092a0dfc]::sys::backtrace::__rust_begin_short_backtrace::::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()> [INFO] [stderr] 32: 0x63b6d15e0df7 - ::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>::{closure#1} as core[37ab4a9f28f6fd13]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0} [INFO] [stderr] 33: 0x7ecd2ec1dbac - ::new::thread_start [INFO] [stderr] 34: 0x7ecd2868aaa4 - [INFO] [stderr] 35: 0x7ecd28717a64 - clone [INFO] [stderr] 36: 0x0 - [INFO] [stderr] [INFO] [stderr] error: the compiler unexpectedly panicked. this is a bug. [INFO] [stderr] [INFO] [stderr] note: we would appreciate a bug report: https://github.com/rust-lang/rust/issues/new?labels=C-bug%2C+I-ICE%2C+T-rustdoc&template=ice.md [INFO] [stderr] [INFO] [stderr] note: please make sure that you have updated to the latest nightly [INFO] [stderr] [INFO] [stderr] warning: the ICE couldn't be written to `/opt/rustwide/workdir/rustc-ice-2026-02-07T19_57_19-24.txt`: Read-only file system (os error 30) [INFO] [stderr] [INFO] [stderr] note: rustc 1.95.0-nightly (a394c9cd9 2026-01-31) running on x86_64-unknown-linux-gnu [INFO] [stderr] [INFO] [stderr] note: compiler flags: --crate-type lib [INFO] [stderr] [INFO] [stderr] note: some of the compiler flags provided by cargo are hidden [INFO] [stderr] [INFO] [stderr] query stack during panic: [INFO] [stderr] end of query stack [INFO] [stderr] error: could not document `exact-covers` [INFO] running `Command { std: "docker" "inspect" "7d86556441c11dbf9c33120e0d479035885dec3c603891760c6fc530c3aafa68", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "7d86556441c11dbf9c33120e0d479035885dec3c603891760c6fc530c3aafa68", kill_on_drop: false }` [INFO] [stdout] 7d86556441c11dbf9c33120e0d479035885dec3c603891760c6fc530c3aafa68