[INFO] cloning repository https://github.com/ubuntu-assist/learning-rust-blockchain
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ubuntu-assist/learning-rust-blockchain" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fubuntu-assist%2Flearning-rust-blockchain", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fubuntu-assist%2Flearning-rust-blockchain'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f2b76e5709e004ec38a7724c3dca04f149cdd5fd
[INFO] building ubuntu-assist/learning-rust-blockchain against try#8b8eff55bd72abbb57167bc42222a7f91d41cb0d for pr-142134-abi-ast-error
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fubuntu-assist%2Flearning-rust-blockchain" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ubuntu-assist/learning-rust-blockchain on toolchain 8b8eff55bd72abbb57167bc42222a7f91d41cb0d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8b8eff55bd72abbb57167bc42222a7f91d41cb0d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ubuntu-assist/learning-rust-blockchain
[INFO] finished tweaking git repo https://github.com/ubuntu-assist/learning-rust-blockchain
[INFO] tweaked toml for git repo https://github.com/ubuntu-assist/learning-rust-blockchain written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/ubuntu-assist/learning-rust-blockchain 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" "+8b8eff55bd72abbb57167bc42222a7f91d41cb0d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+8b8eff55bd72abbb57167bc42222a7f91d41cb0d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d606cb867f46451c6178da8fe966bfe22fb3eed411ef503c9a2f0beba5a929d1
[INFO] running `Command { std: "docker" "start" "-a" "d606cb867f46451c6178da8fe966bfe22fb3eed411ef503c9a2f0beba5a929d1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d606cb867f46451c6178da8fe966bfe22fb3eed411ef503c9a2f0beba5a929d1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d606cb867f46451c6178da8fe966bfe22fb3eed411ef503c9a2f0beba5a929d1", kill_on_drop: false }`
[INFO] [stdout] d606cb867f46451c6178da8fe966bfe22fb3eed411ef503c9a2f0beba5a929d1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+8b8eff55bd72abbb57167bc42222a7f91d41cb0d" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 78a78ae11cc75c38d345eee229115b2525c7f34c0767bfc78ba8140726dedd44
[INFO] running `Command { std: "docker" "start" "-a" "78a78ae11cc75c38d345eee229115b2525c7f34c0767bfc78ba8140726dedd44", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.87
[INFO] [stderr]    Compiling unicode-ident v1.0.13
[INFO] [stderr]    Compiling libc v0.2.159
[INFO] [stderr]    Compiling serde v1.0.210
[INFO] [stderr]    Compiling memchr v2.7.4
[INFO] [stderr]    Compiling itoa v1.0.11
[INFO] [stderr]    Compiling ryu v1.0.18
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling serde_json v1.0.128
[INFO] [stderr]    Compiling lazy_static v1.5.0
[INFO] [stderr]    Compiling encode_unicode v1.0.0
[INFO] [stderr]    Compiling unicode-width v0.1.14
[INFO] [stderr]    Compiling csv-core v0.1.11
[INFO] [stderr]    Compiling quote v1.0.37
[INFO] [stderr]    Compiling syn v2.0.79
[INFO] [stderr]    Compiling dirs-sys-next v0.1.2
[INFO] [stderr]    Compiling is-terminal v0.4.13
[INFO] [stderr]    Compiling dirs-next v2.0.0
[INFO] [stderr]    Compiling term v0.7.0
[INFO] [stderr]    Compiling serde_derive v1.0.210
[INFO] [stderr]    Compiling csv v1.3.0
[INFO] [stderr]    Compiling prettytable v0.10.0
[INFO] [stderr]    Compiling my_project v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `cell`
[INFO] [stdout]  --> src/report.rs:4:19
[INFO] [stdout]   |
[INFO] [stdout] 4 | use prettytable::{cell, row, Table};
[INFO] [stdout]   |                   ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 13.99s
[INFO] running `Command { std: "docker" "inspect" "78a78ae11cc75c38d345eee229115b2525c7f34c0767bfc78ba8140726dedd44", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "78a78ae11cc75c38d345eee229115b2525c7f34c0767bfc78ba8140726dedd44", kill_on_drop: false }`
[INFO] [stdout] 78a78ae11cc75c38d345eee229115b2525c7f34c0767bfc78ba8140726dedd44
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+8b8eff55bd72abbb57167bc42222a7f91d41cb0d" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f5b373c3535c7d8b3d20332b11515eda06fb670c551f52275785cf7f538b8548
[INFO] running `Command { std: "docker" "start" "-a" "f5b373c3535c7d8b3d20332b11515eda06fb670c551f52275785cf7f538b8548", kill_on_drop: false }`
[INFO] [stderr]    Compiling my_project v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `cell`
[INFO] [stdout]  --> src/report.rs:4:19
[INFO] [stdout]   |
[INFO] [stdout] 4 | use prettytable::{cell, row, Table};
[INFO] [stdout]   |                   ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.39s
[INFO] running `Command { std: "docker" "inspect" "f5b373c3535c7d8b3d20332b11515eda06fb670c551f52275785cf7f538b8548", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f5b373c3535c7d8b3d20332b11515eda06fb670c551f52275785cf7f538b8548", kill_on_drop: false }`
[INFO] [stdout] f5b373c3535c7d8b3d20332b11515eda06fb670c551f52275785cf7f538b8548