[INFO] fetching crate otlp-stdout-span-exporter 0.16.0... [INFO] checking otlp-stdout-span-exporter-0.16.0 against try#66388cc165a6c4ac98c074dc9f0281ff23528c55 for pr-150727 [INFO] extracting crate otlp-stdout-span-exporter 0.16.0 into /workspace/builds/worker-0-tc2/source [INFO] started tweaking crates.io crate otlp-stdout-span-exporter 0.16.0 [INFO] removed 0 missing examples [INFO] finished tweaking crates.io crate otlp-stdout-span-exporter 0.16.0 [INFO] tweaked toml for crates.io crate otlp-stdout-span-exporter 0.16.0 written to /workspace/builds/worker-0-tc2/source/Cargo.toml [INFO] validating manifest of crates.io crate otlp-stdout-span-exporter 0.16.0 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 crates.io crate otlp-stdout-span-exporter 0.16.0 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" "+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] 18a1db5ced6394cf97065c933f907c2dcd03933c00a701e937bc811c412c94b8 [INFO] running `Command { std: "docker" "start" "-a" "18a1db5ced6394cf97065c933f907c2dcd03933c00a701e937bc811c412c94b8", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "18a1db5ced6394cf97065c933f907c2dcd03933c00a701e937bc811c412c94b8", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "18a1db5ced6394cf97065c933f907c2dcd03933c00a701e937bc811c412c94b8", kill_on_drop: false }` [INFO] [stdout] 18a1db5ced6394cf97065c933f907c2dcd03933c00a701e937bc811c412c94b8 [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] 25755a4db85bac9a1701ad2d1ed872cc9b97e01a3116afa740fa049d3e790fd9 [INFO] running `Command { std: "docker" "start" "-a" "25755a4db85bac9a1701ad2d1ed872cc9b97e01a3116afa740fa049d3e790fd9", kill_on_drop: false }` [INFO] [stderr] Checking futures-io v0.3.31 [INFO] [stderr] Checking futures-channel v0.3.31 [INFO] [stderr] Checking futures-task v0.3.31 [INFO] [stderr] Compiling zerocopy v0.8.26 [INFO] [stderr] Compiling getrandom v0.3.3 [INFO] [stderr] Checking indexmap v2.10.0 [INFO] [stderr] Compiling thiserror v2.0.12 [INFO] [stderr] Compiling syn v2.0.104 [INFO] [stderr] Checking parking_lot_core v0.9.11 [INFO] [stderr] Compiling anyhow v1.0.98 [INFO] [stderr] Compiling strsim v0.11.1 [INFO] [stderr] Compiling either v1.15.0 [INFO] [stderr] Compiling fnv v1.0.7 [INFO] [stderr] Compiling serde v1.0.219 [INFO] [stderr] Compiling ident_case v1.0.1 [INFO] [stderr] Compiling prettyplease v0.2.35 [INFO] [stderr] Compiling rustversion v1.0.21 [INFO] [stderr] Checking sync_wrapper v1.0.2 [INFO] [stderr] Compiling nix v0.30.1 [INFO] [stderr] Compiling doc-comment v0.3.3 [INFO] [stderr] Checking miniz_oxide v0.8.9 [INFO] [stderr] Checking crc32fast v1.4.2 [INFO] [stderr] Compiling itertools v0.14.0 [INFO] [stderr] Checking sdd v3.0.8 [INFO] [stderr] Checking parking_lot v0.12.4 [INFO] [stderr] Checking rand_core v0.9.3 [INFO] [stderr] Checking scc v2.3.4 [INFO] [stderr] Checking flate2 v1.1.2 [INFO] [stderr] Checking ppv-lite86 v0.2.21 [INFO] [stderr] Checking rand_chacha v0.9.0 [INFO] [stderr] Checking rand v0.9.1 [INFO] [stderr] Compiling darling_core v0.20.11 [INFO] [stderr] Compiling tokio-macros v2.5.0 [INFO] [stderr] Compiling futures-macro v0.3.31 [INFO] [stderr] Compiling tracing-attributes v0.1.30 [INFO] [stderr] Compiling serde_derive v1.0.219 [INFO] [stderr] Compiling thiserror-impl v2.0.12 [INFO] [stderr] Compiling pin-project-internal v1.1.10 [INFO] [stderr] Compiling prost-derive v0.13.5 [INFO] [stderr] Compiling async-trait v0.1.88 [INFO] [stderr] Compiling serial_test_derive v3.2.0 [INFO] [stderr] Checking tokio v1.45.1 [INFO] [stderr] Checking pin-project v1.1.10 [INFO] [stderr] Checking futures-util v0.3.31 [INFO] [stderr] Checking tracing v0.1.41 [INFO] [stderr] Checking opentelemetry v0.30.0 [INFO] [stderr] Checking prost v0.13.5 [INFO] [stderr] Compiling darling_macro v0.20.11 [INFO] [stderr] Compiling darling v0.20.11 [INFO] [stderr] Compiling bon-macros v3.6.4 [INFO] [stderr] Checking futures-executor v0.3.31 [INFO] [stderr] Checking futures v0.3.31 [INFO] [stderr] Checking serial_test v3.2.0 [INFO] [stderr] Checking tokio-util v0.7.15 [INFO] [stderr] Checking tokio-stream v0.1.17 [INFO] [stderr] Checking bon v3.6.4 [INFO] [stderr] Checking h2 v0.4.10 [INFO] [stderr] Checking tower v0.5.2 [INFO] [stderr] Checking serde_json v1.0.140 [INFO] [stderr] Checking opentelemetry_sdk v0.30.0 [INFO] [stderr] Checking hyper v1.6.0 [INFO] [stderr] Checking hyper-util v0.1.14 [INFO] [stderr] Checking hyper-timeout v0.5.2 [INFO] [stderr] Checking tonic v0.13.1 [INFO] [stderr] Checking opentelemetry-proto v0.30.0 [INFO] [stderr] Checking otlp-stdout-span-exporter v0.16.0 (/opt/rustwide/workdir) [INFO] [stderr] [INFO] [stderr] thread 'rustc' (1088) 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/lib.rs:1075:5: 1075:12 (#152), segments: [PathSegment { ident: #152, id: NodeId(4294967040), args: None }], tokens: None }, args: Unparsed(Empty), tokens: None }, tokens: None }), id: AttrId(483), style: Outer, span: src/lib.rs:1075:5: 1075:12 (#152) } [INFO] [stderr] stack backtrace: [INFO] [stderr] 0: 0x7f07ec22bfa3 - <::print::DisplayBacktrace as core[75ca2badb63c4514]::fmt::Display>::fmt [INFO] [stderr] 1: 0x7f07ec80fb48 - core[75ca2badb63c4514]::fmt::write [INFO] [stderr] 2: 0x7f07ec242226 - ::write_fmt [INFO] [stderr] 3: 0x7f07ec201b98 - std[7d609349af90bec6]::panicking::default_hook::{closure#0} [INFO] [stderr] 4: 0x7f07ec21f833 - std[7d609349af90bec6]::panicking::default_hook [INFO] [stderr] 5: 0x7f07eb20236a - std[7d609349af90bec6]::panicking::update_hook::>::{closure#0} [INFO] [stderr] 6: 0x7f07ec21fb12 - std[7d609349af90bec6]::panicking::panic_with_hook [INFO] [stderr] 7: 0x7f07ec201c58 - std[7d609349af90bec6]::panicking::panic_handler::{closure#0} [INFO] [stderr] 8: 0x7f07ec1f89a9 - std[7d609349af90bec6]::sys::backtrace::__rust_end_short_backtrace:: [INFO] [stderr] 9: 0x7f07ec20372d - __rustc[69841a6cbc58d81d]::rust_begin_unwind [INFO] [stderr] 10: 0x7f07e8e38f9c - core[75ca2badb63c4514]::panicking::panic_fmt [INFO] [stderr] 11: 0x7f07ed5e0110 - ::token_trees [INFO] [stderr] 12: 0x7f07ede1c314 - ::fully_expand_fragment [INFO] [stderr] 13: 0x7f07edde65d2 - ::expand_crate [INFO] [stderr] 14: 0x7f07ecef0af3 - rustc_interface[903e43df8d6bd657]::passes::configure_and_expand [INFO] [stderr] 15: 0x7f07eda07658 - rustc_interface[903e43df8d6bd657]::passes::resolver_for_lowering_raw [INFO] [stderr] 16: 0x7f07eda073cd - rustc_query_impl[8c5349e00d64015e]::plumbing::__rust_begin_short_backtrace::> [INFO] [stderr] 17: 0x7f07eda073a7 - >::call_once [INFO] [stderr] 18: 0x7f07ed9ecb5f - rustc_query_system[d45be4fb383a0235]::query::plumbing::try_execute_query::>, false, false, false>, rustc_query_impl[8c5349e00d64015e]::plumbing::QueryCtxt, false> [INFO] [stderr] 19: 0x7f07ed9ec6bc - rustc_query_impl[8c5349e00d64015e]::query_impl::resolver_for_lowering_raw::get_query_non_incr::__rust_end_short_backtrace [INFO] [stderr] 20: 0x7f07edb7127b - , 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: 0x7f07eda5ac98 - rustc_interface[903e43df8d6bd657]::interface::run_compiler::<(), rustc_driver_impl[3f9d6dd912ac34bd]::run_compiler::{closure#0}>::{closure#1} [INFO] [stderr] 22: 0x7f07ed8eac4e - std[7d609349af90bec6]::sys::backtrace::__rust_begin_short_backtrace::::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()> [INFO] [stderr] 23: 0x7f07ed8eaa20 - ::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>::{closure#1} as core[75ca2badb63c4514]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0} [INFO] [stderr] 24: 0x7f07ed8ed138 - ::new::thread_start [INFO] [stderr] 25: 0x7f07e748aaa4 - [INFO] [stderr] 26: 0x7f07e7517a64 - 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-2026-01-08T21_11_23-1083.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 `otlp-stdout-span-exporter` (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 otlp_stdout_span_exporter --edition=2021 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=e251de7cf6d7417b -C extra-filename=-4400b0e51b252a2d --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern async_trait=/opt/rustwide/target/debug/deps/libasync_trait-31261c00ecadf2bd.so --extern base64=/opt/rustwide/target/debug/deps/libbase64-d8aec028dea2d277.rmeta --extern bon=/opt/rustwide/target/debug/deps/libbon-dd3fb7c110788ba0.rmeta --extern doc_comment=/opt/rustwide/target/debug/deps/libdoc_comment-6cb3d7c74559ca1c.rmeta --extern flate2=/opt/rustwide/target/debug/deps/libflate2-02e2016f236f17ca.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-74fdcfdf3875e7c0.rmeta --extern nix=/opt/rustwide/target/debug/deps/libnix-b2ee96c59367c8ac.rmeta --extern opentelemetry=/opt/rustwide/target/debug/deps/libopentelemetry-6f4a8d4fb01fc20a.rmeta --extern opentelemetry_proto=/opt/rustwide/target/debug/deps/libopentelemetry_proto-eec4521f5224a5b9.rmeta --extern opentelemetry_sdk=/opt/rustwide/target/debug/deps/libopentelemetry_sdk-5df18b9291c4ef6d.rmeta --extern prost=/opt/rustwide/target/debug/deps/libprost-7c7d02a66d2f9a3c.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-7a8f5dce7e24bc8e.rmeta --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-3d91a77f63104658.rmeta --extern serial_test=/opt/rustwide/target/debug/deps/libserial_test-47be535a36f3b9c8.rmeta --extern tokio=/opt/rustwide/target/debug/deps/libtokio-57d37a32bef92d23.rmeta --cap-lints=forbid` (exit status: 101) [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] running `Command { std: "docker" "inspect" "25755a4db85bac9a1701ad2d1ed872cc9b97e01a3116afa740fa049d3e790fd9", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "25755a4db85bac9a1701ad2d1ed872cc9b97e01a3116afa740fa049d3e790fd9", kill_on_drop: false }` [INFO] [stdout] 25755a4db85bac9a1701ad2d1ed872cc9b97e01a3116afa740fa049d3e790fd9