[INFO] fetching crate bigml 1.0.1...
[INFO] testing bigml-1.0.1 against beta-2025-09-21 for beta-1.91-3
[INFO] extracting crate bigml 1.0.1 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate bigml 1.0.1
[INFO] finished tweaking crates.io crate bigml 1.0.1
[INFO] tweaked toml for crates.io crate bigml 1.0.1 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate bigml 1.0.1 on toolchain beta-2025-09-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate bigml 1.0.1 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-2025-09-21" "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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 029f5f519397641bc897ff501f87f10a1e8511406f409a9c39ce2901ea0fcb0d
[INFO] running `Command { std: "docker" "start" "-a" "029f5f519397641bc897ff501f87f10a1e8511406f409a9c39ce2901ea0fcb0d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "029f5f519397641bc897ff501f87f10a1e8511406f409a9c39ce2901ea0fcb0d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "029f5f519397641bc897ff501f87f10a1e8511406f409a9c39ce2901ea0fcb0d", kill_on_drop: false }`
[INFO] [stdout] 029f5f519397641bc897ff501f87f10a1e8511406f409a9c39ce2901ea0fcb0d
[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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b407fda58d8d10bd5be217fd8f8f2a892283f50eeb041e2b96f4dfa7477686ab
[INFO] running `Command { std: "docker" "start" "-a" "b407fda58d8d10bd5be217fd8f8f2a892283f50eeb041e2b96f4dfa7477686ab", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.64
[INFO] [stderr]    Compiling quote v1.0.29
[INFO] [stderr]    Compiling unicode-ident v1.0.10
[INFO] [stderr]    Compiling pin-project-lite v0.2.10
[INFO] [stderr]    Compiling futures-util v0.3.28
[INFO] [stderr]    Compiling ring v0.16.20
[INFO] [stderr]    Compiling tokio v1.29.1
[INFO] [stderr]    Compiling itoa v1.0.8
[INFO] [stderr]    Compiling tracing-core v0.1.31
[INFO] [stderr]    Compiling unicase v2.6.0
[INFO] [stderr]    Compiling serde v1.0.171
[INFO] [stderr]    Compiling rustls v0.21.5
[INFO] [stderr]    Compiling log v0.4.19
[INFO] [stderr]    Compiling unicode-normalization v0.1.22
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling base64 v0.21.2
[INFO] [stderr]    Compiling ryu v1.0.14
[INFO] [stderr]    Compiling serde_json v1.0.102
[INFO] [stderr]    Compiling http v0.2.9
[INFO] [stderr]    Compiling unicode-bidi v0.3.13
[INFO] [stderr]    Compiling thiserror v1.0.43
[INFO] [stderr]    Compiling ipnet v2.8.0
[INFO] [stderr]    Compiling rustls-pemfile v1.0.3
[INFO] [stderr]    Compiling rustls-native-certs v0.6.3
[INFO] [stderr]    Compiling mime_guess v2.0.4
[INFO] [stderr]    Compiling idna v0.4.0
[INFO] [stderr]    Compiling syn v2.0.25
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling http-body v0.4.5
[INFO] [stderr]    Compiling url v2.4.0
[INFO] [stderr]    Compiling bigml_derive v0.4.1
[INFO] [stderr]    Compiling sct v0.7.0
[INFO] [stderr]    Compiling rustls-webpki v0.101.1
[INFO] [stderr]    Compiling futures-macro v0.3.28
[INFO] [stderr]    Compiling tracing-attributes v0.1.26
[INFO] [stderr]    Compiling tokio-macros v2.1.0
[INFO] [stderr]    Compiling serde_derive v1.0.171
[INFO] [stderr]    Compiling pin-project-internal v1.1.2
[INFO] [stderr]    Compiling thiserror-impl v1.0.43
[INFO] [stderr]    Compiling tracing v0.1.37
[INFO] [stderr]    Compiling pin-project v1.1.2
[INFO] [stderr]    Compiling tracing-futures v0.2.5
[INFO] [stderr]    Compiling futures-executor v0.3.28
[INFO] [stderr]    Compiling futures v0.3.28
[INFO] [stderr]    Compiling tokio-util v0.7.8
[INFO] [stderr]    Compiling tokio-rustls v0.24.1
[INFO] [stderr]    Compiling serde_urlencoded v0.7.1
[INFO] [stderr]    Compiling chrono v0.4.26
[INFO] [stderr]    Compiling h2 v0.3.20
[INFO] [stderr]    Compiling hyper v0.14.27
[INFO] [stderr]    Compiling hyper-rustls v0.24.1
[INFO] [stderr]    Compiling reqwest v0.11.18
[INFO] [stderr]    Compiling bigml v1.0.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 25.93s
[INFO] running `Command { std: "docker" "inspect" "b407fda58d8d10bd5be217fd8f8f2a892283f50eeb041e2b96f4dfa7477686ab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b407fda58d8d10bd5be217fd8f8f2a892283f50eeb041e2b96f4dfa7477686ab", kill_on_drop: false }`
[INFO] [stdout] b407fda58d8d10bd5be217fd8f8f2a892283f50eeb041e2b96f4dfa7477686ab
[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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ab4591cf2584ad2ddca390f596f5850be0b8fda029d2d708b51aeab7baf5dc9f
[INFO] running `Command { std: "docker" "start" "-a" "ab4591cf2584ad2ddca390f596f5850be0b8fda029d2d708b51aeab7baf5dc9f", kill_on_drop: false }`
[INFO] [stderr]    Compiling regex-syntax v0.7.4
[INFO] [stderr]    Compiling anyhow v1.0.71
[INFO] [stderr]    Compiling tracing-log v0.1.3
[INFO] [stderr]    Compiling regex-automata v0.3.3
[INFO] [stderr]    Compiling regex v1.9.1
[INFO] [stderr]    Compiling tracing-subscriber v0.3.17
[INFO] [stderr]    Compiling bigml v1.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0599]: no method named `backtrace` found for struct `anyhow::Error` in the current scope
[INFO] [stdout]    --> examples/create_execution.rs:113:31
[INFO] [stdout]     |
[INFO] [stdout] 113 |         eprintln!("{:?}", err.backtrace());
[INFO] [stdout]     |                               ^^^^^^^^^ method not found in `anyhow::Error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0599`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `bigml` (example "create_execution") due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "ab4591cf2584ad2ddca390f596f5850be0b8fda029d2d708b51aeab7baf5dc9f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ab4591cf2584ad2ddca390f596f5850be0b8fda029d2d708b51aeab7baf5dc9f", kill_on_drop: false }`
[INFO] [stdout] ab4591cf2584ad2ddca390f596f5850be0b8fda029d2d708b51aeab7baf5dc9f
