[INFO] fetching crate expman-core 0.2.2...
[INFO] testing expman-core-0.2.2 against beta-2026-03-05 for beta-1.95-1
[INFO] extracting crate expman-core 0.2.2 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate expman-core 0.2.2
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate expman-core 0.2.2
[INFO] tweaked toml for crates.io crate expman-core 0.2.2 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate expman-core 0.2.2 on toolchain beta-2026-03-05
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-03-05" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate expman-core 0.2.2 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" "+beta-2026-03-05" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-03-05" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4021682ffc2ed2b46e0d436d89ee9715019cbbc7bb2f6a3224be6ef1624aa209
[INFO] running `Command { std: "docker" "start" "-a" "4021682ffc2ed2b46e0d436d89ee9715019cbbc7bb2f6a3224be6ef1624aa209", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4021682ffc2ed2b46e0d436d89ee9715019cbbc7bb2f6a3224be6ef1624aa209", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4021682ffc2ed2b46e0d436d89ee9715019cbbc7bb2f6a3224be6ef1624aa209", kill_on_drop: false }`
[INFO] [stdout] 4021682ffc2ed2b46e0d436d89ee9715019cbbc7bb2f6a3224be6ef1624aa209
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-03-05" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 71ea0e471ad67bfe072f53e48dcace4c3af14d657df5ae86487dc68e74bfa4dd
[INFO] running `Command { std: "docker" "start" "-a" "71ea0e471ad67bfe072f53e48dcace4c3af14d657df5ae86487dc68e74bfa4dd", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v2.0.117
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling zerocopy v0.8.40
[INFO] [stderr]    Compiling getrandom v0.3.4
[INFO] [stderr]    Compiling ahash v0.8.12
[INFO] [stderr]    Compiling memchr v2.8.0
[INFO] [stderr]    Compiling arrow-schema v53.4.1
[INFO] [stderr]    Compiling hashbrown v0.15.5
[INFO] [stderr]    Compiling lexical-util v1.0.7
[INFO] [stderr]    Compiling jobserver v0.1.34
[INFO] [stderr]    Compiling regex-syntax v0.8.10
[INFO] [stderr]    Compiling aho-corasick v1.1.4
[INFO] [stderr]    Compiling lexical-parse-integer v1.0.6
[INFO] [stderr]    Compiling lexical-write-integer v1.0.6
[INFO] [stderr]    Compiling cc v1.2.56
[INFO] [stderr]    Compiling lexical-parse-float v1.0.6
[INFO] [stderr]    Compiling num-integer v0.1.46
[INFO] [stderr]    Compiling num-complex v0.4.6
[INFO] [stderr]    Compiling num-bigint v0.4.6
[INFO] [stderr]    Compiling num-iter v0.1.45
[INFO] [stderr]    Compiling lexical-write-float v1.0.6
[INFO] [stderr]    Compiling atoi v2.0.0
[INFO] [stderr]    Compiling flatbuffers v24.12.23
[INFO] [stderr]    Compiling lexical-core v1.0.6
[INFO] [stderr]    Compiling serde_json v1.0.149
[INFO] [stderr]    Compiling zstd-safe v7.2.1
[INFO] [stderr]    Compiling alloc-no-stdlib v2.0.4
[INFO] [stderr]    Compiling alloc-stdlib v0.2.2
[INFO] [stderr]    Compiling csv-core v0.1.13
[INFO] [stderr]    Compiling regex-automata v0.4.14
[INFO] [stderr]    Compiling snap v1.1.1
[INFO] [stderr]    Compiling deranged v0.5.8
[INFO] [stderr]    Compiling num-rational v0.4.2
[INFO] [stderr]    Compiling num v0.4.3
[INFO] [stderr]    Compiling zstd-sys v2.0.13+zstd.1.5.6
[INFO] [stderr]    Compiling csv v1.4.0
[INFO] [stderr]    Compiling brotli-decompressor v4.0.3
[INFO] [stderr]    Compiling ordered-float v2.10.1
[INFO] [stderr]    Compiling twox-hash v2.1.2
[INFO] [stderr]    Compiling num-conv v0.2.0
[INFO] [stderr]    Compiling time-core v0.1.8
[INFO] [stderr]    Compiling integer-encoding v3.0.4
[INFO] [stderr]    Compiling twox-hash v1.6.3
[INFO] [stderr]    Compiling thrift v0.17.0
[INFO] [stderr]    Compiling time v0.3.47
[INFO] [stderr]    Compiling lz4_flex v0.11.5
[INFO] [stderr]    Compiling crossbeam-channel v0.5.15
[INFO] [stderr]    Compiling brotli v7.0.0
[INFO] [stderr]    Compiling flate2 v1.1.9
[INFO] [stderr]    Compiling seq-macro v0.3.6
[INFO] [stderr]    Compiling uuid v1.21.0
[INFO] [stderr]    Compiling regex v1.12.3
[INFO] [stderr]    Compiling matchers v0.2.0
[INFO] [stderr]    Compiling serde_derive v1.0.228
[INFO] [stderr]    Compiling zerocopy-derive v0.8.40
[INFO] [stderr]    Compiling tracing-attributes v0.1.31
[INFO] [stderr]    Compiling thiserror-impl v2.0.18
[INFO] [stderr]    Compiling tokio-macros v2.6.0
[INFO] [stderr]    Compiling tracing v0.1.44
[INFO] [stderr]    Compiling thiserror-impl v1.0.69
[INFO] [stderr]    Compiling tokio v1.49.0
[INFO] [stderr]    Compiling thiserror v2.0.18
[INFO] [stderr]    Compiling thiserror v1.0.69
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]    Compiling chrono v0.4.39
[INFO] [stderr]    Compiling tracing-serde v0.2.0
[INFO] [stderr]    Compiling serde_yaml v0.9.34+deprecated
[INFO] [stderr]    Compiling tracing-subscriber v0.3.22
[INFO] [stderr]    Compiling zstd v0.13.3
[INFO] [stderr]    Compiling tracing-appender v0.2.4
[INFO] [stderr]    Compiling half v2.7.1
[INFO] [stderr]    Compiling arrow-buffer v53.4.1
[INFO] [stderr]    Compiling arrow-data v53.4.1
[INFO] [stderr]    Compiling arrow-array v53.4.1
[INFO] [stderr]    Compiling arrow-select v53.4.1
[INFO] [stderr]    Compiling arrow-row v53.4.1
[INFO] [stderr]    Compiling arrow-arith v53.4.1
[INFO] [stderr]    Compiling arrow-cast v53.4.1
[INFO] [stderr]    Compiling arrow-ord v53.4.1
[INFO] [stderr]    Compiling arrow-string v53.4.1
[INFO] [stderr]    Compiling arrow-ipc v53.4.1
[INFO] [stderr]    Compiling arrow-json v53.4.1
[INFO] [stderr]    Compiling arrow-csv v53.4.1
[INFO] [stderr]    Compiling parquet v53.4.1
[INFO] [stderr]    Compiling arrow v53.4.1
[INFO] [stderr]    Compiling expman-core v0.2.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2m 44s
[INFO] running `Command { std: "docker" "inspect" "71ea0e471ad67bfe072f53e48dcace4c3af14d657df5ae86487dc68e74bfa4dd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "71ea0e471ad67bfe072f53e48dcace4c3af14d657df5ae86487dc68e74bfa4dd", kill_on_drop: false }`
[INFO] [stdout] 71ea0e471ad67bfe072f53e48dcace4c3af14d657df5ae86487dc68e74bfa4dd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-03-05" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fe91e99e22fbc920e3f9ef3724e38b03f4c25691495f545fd2e7a1ea68a865d3
[INFO] running `Command { std: "docker" "start" "-a" "fe91e99e22fbc920e3f9ef3724e38b03f4c25691495f545fd2e7a1ea68a865d3", kill_on_drop: false }`
[INFO] [stderr]    Compiling tokio v1.49.0
[INFO] [stderr]    Compiling rustix v1.1.4
[INFO] [stderr]    Compiling tempfile v3.26.0
[INFO] [stderr]    Compiling expman-core v0.2.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 13.03s
[INFO] running `Command { std: "docker" "inspect" "fe91e99e22fbc920e3f9ef3724e38b03f4c25691495f545fd2e7a1ea68a865d3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fe91e99e22fbc920e3f9ef3724e38b03f4c25691495f545fd2e7a1ea68a865d3", kill_on_drop: false }`
[INFO] [stdout] fe91e99e22fbc920e3f9ef3724e38b03f4c25691495f545fd2e7a1ea68a865d3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-03-05" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 81e40fcb536772896118c2d4a6db3ccc77a489cad4e74e6fec44f49f97a62f65
[INFO] running `Command { std: "docker" "start" "-a" "81e40fcb536772896118c2d4a6db3ccc77a489cad4e74e6fec44f49f97a62f65", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.17s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/expman_core-f1d87f9006027f6d)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running tests/integration_test.rs (/opt/rustwide/target/debug/deps/integration_test-dab46a1669ece374)
[INFO] [stdout] 
[INFO] [stdout] running 8 tests
[INFO] [stdout] test test_save_artifact_relative_path ... ok
[INFO] [stdout] test test_run_status_written_on_close ... ok
[INFO] [stdout] test test_engine_creates_run_dir ... ok
[INFO] [stdout] test test_log_params_writes_yaml ... ok
[INFO] [stdout] test test_parquet_schema_merge ... ok
[INFO] [stdout] test test_read_latest_scalar_metrics ... ok
[INFO] [stdout] test test_log_metrics_writes_parquet ... ok
[INFO] [stdout] test test_log_metrics_is_fast ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 8 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 38.23s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests expman_core
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/lib.rs - (line 20) ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/lib.rs - (line 20) stdout ----
[INFO] [stdout] Test executable failed (exit status: 1).
[INFO] [stdout] 
[INFO] [stdout] stderr:
[INFO] [stdout] Error: I/O error: Read-only file system (os error 30)
[INFO] [stdout] 
[INFO] [stdout] Caused by:
[INFO] [stdout]     Read-only file system (os error 30)
[INFO] [stdout] 
[INFO] [stdout] Stack backtrace:
[INFO] [stdout]    0: anyhow::error::<impl core::convert::From<E> for anyhow::Error>::from
[INFO] [stdout]    1: <core::result::Result<T,F> as core::ops::try_trait::FromResidual<core::result::Result<core::convert::Infallible,E>>>::from_residual
[INFO] [stdout]    2: rust_out::main
[INFO] [stdout]    3: core::ops::function::FnOnce::call_once
[INFO] [stdout]    4: std::sys::backtrace::__rust_begin_short_backtrace
[INFO] [stdout]    5: std::rt::lang_start::{{closure}}
[INFO] [stdout]    6: <&dyn core::ops::function::Fn<(), Output = i32> + core::panic::unwind_safe::RefUnwindSafe + core::marker::Sync as core::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]              at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/core/src/ops/function.rs:287:21
[INFO] [stdout]    7: std::panicking::catch_unwind::do_call::<&dyn core::ops::function::Fn<(), Output = i32> + core::panic::unwind_safe::RefUnwindSafe + core::marker::Sync, i32>
[INFO] [stdout]              at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/std/src/panicking.rs:581:40
[INFO] [stdout]    8: std::panicking::catch_unwind::<i32, &dyn core::ops::function::Fn<(), Output = i32> + core::panic::unwind_safe::RefUnwindSafe + core::marker::Sync>
[INFO] [stdout]              at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/std/src/panicking.rs:544:19
[INFO] [stdout]    9: std::panic::catch_unwind::<&dyn core::ops::function::Fn<(), Output = i32> + core::panic::unwind_safe::RefUnwindSafe + core::marker::Sync, i32>
[INFO] [stdout]              at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/std/src/panic.rs:359:14
[INFO] [stdout]   10: std::rt::lang_start_internal::{closure#0}
[INFO] [stdout]              at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/std/src/rt.rs:175:24
[INFO] [stdout]   11: std::panicking::catch_unwind::do_call::<std::rt::lang_start_internal::{closure#0}, isize>
[INFO] [stdout]              at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/std/src/panicking.rs:581:40
[INFO] [stdout]   12: std::panicking::catch_unwind::<isize, std::rt::lang_start_internal::{closure#0}>
[INFO] [stdout]              at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/std/src/panicking.rs:544:19
[INFO] [stdout]   13: std::panic::catch_unwind::<std::rt::lang_start_internal::{closure#0}, isize>
[INFO] [stdout]              at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/std/src/panic.rs:359:14
[INFO] [stdout]   14: std::rt::lang_start_internal
[INFO] [stdout]              at /rustc/ad726b5063362ec9897ef3d67452fc5606ee70fa/library/std/src/rt.rs:171:5
[INFO] [stdout]   15: std::rt::lang_start
[INFO] [stdout]   16: main
[INFO] [stdout]   17: <unknown>
[INFO] [stdout]   18: __libc_start_main
[INFO] [stdout]   19: _start
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/lib.rs - (line 20)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 1.88s
[INFO] [stdout] 
[INFO] [stderr] error: doctest failed, to rerun pass `--doc`
[INFO] running `Command { std: "docker" "inspect" "81e40fcb536772896118c2d4a6db3ccc77a489cad4e74e6fec44f49f97a62f65", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "81e40fcb536772896118c2d4a6db3ccc77a489cad4e74e6fec44f49f97a62f65", kill_on_drop: false }`
[INFO] [stdout] 81e40fcb536772896118c2d4a6db3ccc77a489cad4e74e6fec44f49f97a62f65
