[INFO] cloning repository https://github.com/francoisperron/learning-rust [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/francoisperron/learning-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffrancoisperron%2Flearning-rust", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffrancoisperron%2Flearning-rust'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 147cfb4d77fbe9279540000c28ab9564cb65ab20 [INFO] checking francoisperron/learning-rust against try#66388cc165a6c4ac98c074dc9f0281ff23528c55 for pr-150727 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffrancoisperron%2Flearning-rust" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'... [INFO] [stderr] done. [INFO] started tweaking git repo https://github.com/francoisperron/learning-rust [INFO] finished tweaking git repo https://github.com/francoisperron/learning-rust [INFO] tweaked toml for git repo https://github.com/francoisperron/learning-rust written to /workspace/builds/worker-0-tc2/source/Cargo.toml [INFO] validating manifest of git repo https://github.com/francoisperron/learning-rust on toolchain 66388cc165a6c4ac98c074dc9f0281ff23528c55 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+66388cc165a6c4ac98c074dc9f0281ff23528c55" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] crate git repo https://github.com/francoisperron/learning-rust 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" "+66388cc165a6c4ac98c074dc9f0281ff23528c55" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+66388cc165a6c4ac98c074dc9f0281ff23528c55" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] c15d8e146926e442ef2d09a934b9034ef1500d3e3d366de47bb685e581e28698 [INFO] running `Command { std: "docker" "start" "-a" "c15d8e146926e442ef2d09a934b9034ef1500d3e3d366de47bb685e581e28698", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "c15d8e146926e442ef2d09a934b9034ef1500d3e3d366de47bb685e581e28698", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "c15d8e146926e442ef2d09a934b9034ef1500d3e3d366de47bb685e581e28698", kill_on_drop: false }` [INFO] [stdout] c15d8e146926e442ef2d09a934b9034ef1500d3e3d366de47bb685e581e28698 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+66388cc165a6c4ac98c074dc9f0281ff23528c55" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] d0e5640e199b0b0a293337848b7ed944a2add9e807d7e2fd8cebc3afa9949665 [INFO] running `Command { std: "docker" "start" "-a" "d0e5640e199b0b0a293337848b7ed944a2add9e807d7e2fd8cebc3afa9949665", kill_on_drop: false }` [INFO] [stderr] Compiling libc v0.2.150 [INFO] [stderr] Compiling syn v1.0.109 [INFO] [stderr] Compiling futures-core v0.3.29 [INFO] [stderr] Compiling futures-channel v0.3.29 [INFO] [stderr] Compiling futures-task v0.3.29 [INFO] [stderr] Compiling num-traits v0.2.17 [INFO] [stderr] Checking regex-syntax v0.8.2 [INFO] [stderr] Checking _12_minigrep v0.1.0 (/opt/rustwide/workdir/src/book/_12_minigrep) [INFO] [stderr] Checking aho-corasick v1.1.2 [INFO] [stderr] Checking futures-sink v0.3.29 [INFO] [stderr] Compiling futures-util v0.3.29 [INFO] [stderr] Checking futures-io v0.3.29 [INFO] [stderr] Checking _20_web_server v0.1.0 (/opt/rustwide/workdir/src/book/_20_web_server) [INFO] [stderr] Checking smallvec v1.11.1 [INFO] [stderr] Checking predicates-core v1.0.6 [INFO] [stderr] Checking either v1.9.0 [INFO] [stderr] Compiling syn v2.0.39 [INFO] [stderr] Checking _19_hello_macro v0.1.0 (/opt/rustwide/workdir/src/book/_19_hello_macro) [INFO] [stderr] Checking hashbrown v0.14.2 [INFO] [stderr] Checking termtree v0.4.1 [INFO] [stderr] Checking unicode-ident v1.0.12 [INFO] [stderr] Checking predicates-tree v1.0.9 [INFO] [stderr] Checking proc-macro2 v1.0.69 [INFO] [stderr] Checking itertools v0.11.0 [INFO] [stderr] Checking quote v1.0.33 [INFO] [stderr] Compiling cc v1.0.83 [INFO] [stderr] Checking getrandom v0.2.11 [INFO] [stderr] Checking parking_lot_core v0.9.9 [INFO] [stderr] Checking wait-timeout v0.2.0 [INFO] [stderr] Checking rand_core v0.6.4 [INFO] [stderr] Checking parking_lot v0.12.1 [INFO] [stderr] Checking dashmap v5.5.3 [INFO] [stderr] Checking float-cmp v0.9.0 [INFO] [stderr] Checking rand_chacha v0.3.1 [INFO] [stderr] Compiling psm v0.1.21 [INFO] [stderr] Compiling stacker v0.1.15 [INFO] [stderr] Checking rand v0.8.5 [INFO] [stderr] Compiling _19_hello_macro_derive v0.1.0 (/opt/rustwide/workdir/src/book/_19_hello_macro/_19_hello_macro_derive) [INFO] [stderr] Checking futures-executor v0.3.29 [INFO] [stderr] Checking learning-rust v0.1.0 (/opt/rustwide/workdir) [INFO] [stderr] Checking futures v0.3.29 [INFO] [stderr] Checking regex-automata v0.4.3 [INFO] [stderr] Compiling serial_test_derive v2.0.0 [INFO] [stderr] Checking serial_test v2.0.0 [INFO] [stderr] Checking regex v1.10.2 [INFO] [stderr] Checking bstr v1.7.0 [INFO] [stderr] Checking predicates v3.0.4 [INFO] [stderr] Checking assert_cmd v2.0.12 [INFO] [stderr] [INFO] [stderr] thread 'rustc' (814) panicked at /rustc-dev/66388cc165a6c4ac98c074dc9f0281ff23528c55/compiler/rustc_ast/src/attr/mod.rs:302:36: [INFO] [stderr] attribute is missing tokens: Attribute { kind: Normal(NormalAttr { item: AttrItem { unsafety: Default, path: Path { span: src/book/_12_minigrep/src/config.rs:26:5: 26:12 (#5), segments: [PathSegment { ident: #5, id: NodeId(4294967040), args: None }], tokens: None }, args: Unparsed(Empty), tokens: None }, tokens: None }), id: AttrId(11), style: Outer, span: src/book/_12_minigrep/src/config.rs:26:5: 26:12 (#5) } [INFO] [stderr] stack backtrace: [INFO] [stderr] 0: 0x778afac2bfa3 - <::print::DisplayBacktrace as core[75ca2badb63c4514]::fmt::Display>::fmt [INFO] [stderr] 1: 0x778afb20fb48 - core[75ca2badb63c4514]::fmt::write [INFO] [stderr] 2: 0x778afac42226 - ::write_fmt [INFO] [stderr] 3: 0x778afac01b98 - std[7d609349af90bec6]::panicking::default_hook::{closure#0} [INFO] [stderr] 4: 0x778afac1f833 - std[7d609349af90bec6]::panicking::default_hook [INFO] [stderr] 5: 0x778af9c0236a - std[7d609349af90bec6]::panicking::update_hook::>::{closure#0} [INFO] [stderr] 6: 0x778afac1fb12 - std[7d609349af90bec6]::panicking::panic_with_hook [INFO] [stderr] 7: 0x778afac01c58 - std[7d609349af90bec6]::panicking::panic_handler::{closure#0} [INFO] [stderr] 8: 0x778afabf89a9 - std[7d609349af90bec6]::sys::backtrace::__rust_end_short_backtrace:: [INFO] [stderr] 9: 0x778afac0372d - __rustc[69841a6cbc58d81d]::rust_begin_unwind [INFO] [stderr] 10: 0x778af7838f9c - core[75ca2badb63c4514]::panicking::panic_fmt [INFO] [stderr] 11: 0x778afbfe0110 - ::token_trees [INFO] [stderr] 12: 0x778afc81c314 - ::fully_expand_fragment [INFO] [stderr] 13: 0x778afc7e65d2 - ::expand_crate [INFO] [stderr] 14: 0x778afb8f0af3 - rustc_interface[903e43df8d6bd657]::passes::configure_and_expand [INFO] [stderr] 15: 0x778afc407658 - rustc_interface[903e43df8d6bd657]::passes::resolver_for_lowering_raw [INFO] [stderr] 16: 0x778afc4073cd - rustc_query_impl[8c5349e00d64015e]::plumbing::__rust_begin_short_backtrace::> [INFO] [stderr] 17: 0x778afc4073a7 - >::call_once [INFO] [stderr] 18: 0x778afc3ecb5f - rustc_query_system[d45be4fb383a0235]::query::plumbing::try_execute_query::>, false, false, false>, rustc_query_impl[8c5349e00d64015e]::plumbing::QueryCtxt, false> [INFO] [stderr] 19: 0x778afc3ec6bc - rustc_query_impl[8c5349e00d64015e]::query_impl::resolver_for_lowering_raw::get_query_non_incr::__rust_end_short_backtrace [INFO] [stderr] 20: 0x778afc57127b - , rustc_driver_impl[3f9d6dd912ac34bd]::run_compiler::{closure#0}::{closure#2}>::{closure#2} as core[75ca2badb63c4514]::ops::function::FnOnce<(&rustc_session[1e6875ba352dc1ba]::session::Session, rustc_middle[2342951a64deba5]::ty::context::CurrentGcx, alloc[d7482eb0f1d19161]::sync::Arc, &std[7d609349af90bec6]::sync::once_lock::OnceLock, &rustc_data_structures[c82a87ce5cdbfc92]::sync::worker_local::WorkerLocal, &rustc_data_structures[c82a87ce5cdbfc92]::sync::worker_local::WorkerLocal, rustc_driver_impl[3f9d6dd912ac34bd]::run_compiler::{closure#0}::{closure#2})>>::call_once::{shim:vtable#0} [INFO] [stderr] 21: 0x778afc45ac98 - rustc_interface[903e43df8d6bd657]::interface::run_compiler::<(), rustc_driver_impl[3f9d6dd912ac34bd]::run_compiler::{closure#0}>::{closure#1} [INFO] [stderr] 22: 0x778afc2eac4e - std[7d609349af90bec6]::sys::backtrace::__rust_begin_short_backtrace::::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()> [INFO] [stderr] 23: 0x778afc2eaa20 - ::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>::{closure#1} as core[75ca2badb63c4514]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0} [INFO] [stderr] 24: 0x778afc2ed138 - ::new::thread_start [INFO] [stderr] 25: 0x778af5e8aaa4 - [INFO] [stderr] 26: 0x778af5f17a64 - clone [INFO] [stderr] 27: 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-compiler&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-2026-01-09T14_06_09-802.txt`: Read-only file system (os error 30) [INFO] [stderr] [INFO] [stderr] note: rustc 1.94.0-nightly (66388cc16 2026-01-08) running on x86_64-unknown-linux-gnu [INFO] [stderr] [INFO] [stderr] note: compiler flags: -C embed-bitcode=no -C debuginfo=2 [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] #0 [resolver_for_lowering_raw] getting the resolver for lowering [INFO] [stderr] end of query stack [INFO] [stderr] error: could not compile `_12_minigrep` (lib test) [INFO] [stderr] [INFO] [stderr] Caused by: [INFO] [stderr] process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/66388cc165a6c4ac98c074dc9f0281ff23528c55/bin/rustc --crate-name _12_minigrep --edition=2021 src/book/_12_minigrep/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --emit=dep-info,metadata -C embed-bitcode=no -C debuginfo=2 --test --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values())' -C metadata=303f089b2217d764 -C extra-filename=-afcc8458d48ba35f --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern assert_cmd=/opt/rustwide/target/debug/deps/libassert_cmd-e35f4ed54d3bc5ff.rmeta --extern predicates=/opt/rustwide/target/debug/deps/libpredicates-8771af4b03fd0735.rmeta --extern serial_test=/opt/rustwide/target/debug/deps/libserial_test-350d7515e0c752fa.rmeta --cap-lints=forbid` (exit status: 101) [INFO] running `Command { std: "docker" "inspect" "d0e5640e199b0b0a293337848b7ed944a2add9e807d7e2fd8cebc3afa9949665", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "d0e5640e199b0b0a293337848b7ed944a2add9e807d7e2fd8cebc3afa9949665", kill_on_drop: false }` [INFO] [stdout] d0e5640e199b0b0a293337848b7ed944a2add9e807d7e2fd8cebc3afa9949665