[INFO] fetching crate rbn 0.1.4...
[INFO] building rbn-0.1.4 against master#c7f6aa2869acdbf014d094c6e427e554e160b6db for pr-146237-2
[INFO] extracting crate rbn 0.1.4 into /workspace/builds/worker-7-tc1/source
[INFO] started tweaking crates.io crate rbn 0.1.4
[INFO] finished tweaking crates.io crate rbn 0.1.4
[INFO] tweaked toml for crates.io crate rbn 0.1.4 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate rbn 0.1.4 on toolchain c7f6aa2869acdbf014d094c6e427e554e160b6db
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate rbn 0.1.4 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" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded pad v0.1.6
[INFO] [stderr]   Downloaded rustc-demangle v0.1.18
[INFO] [stderr]   Downloaded addr2line v0.14.1
[INFO] [stderr]   Downloaded regex-syntax v0.6.24
[INFO] [stderr]   Downloaded syn v1.0.71
[INFO] [stderr]   Downloaded gimli v0.23.0
[INFO] [stderr]   Downloaded object v0.23.0
[INFO] [stderr]   Downloaded rbn-lib v0.1.4
[INFO] [stderr]   Downloaded ctrlc v3.1.9
[INFO] [stderr]   Downloaded synstructure v0.12.4
[INFO] [stderr]   Downloaded hambands v0.1.2
[INFO] [stderr]   Downloaded regex v1.5.2
[INFO] [stderr]   Downloaded backtrace v0.3.58
[INFO] [stderr]   Downloaded nix v0.20.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 54ed6eea374c16daeaf2c2e0197e51ec687f52e48ef3ccb61b584e642f39b6b3
[INFO] running `Command { std: "docker" "start" "-a" "54ed6eea374c16daeaf2c2e0197e51ec687f52e48ef3ccb61b584e642f39b6b3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "54ed6eea374c16daeaf2c2e0197e51ec687f52e48ef3ccb61b584e642f39b6b3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "54ed6eea374c16daeaf2c2e0197e51ec687f52e48ef3ccb61b584e642f39b6b3", kill_on_drop: false }`
[INFO] [stdout] 54ed6eea374c16daeaf2c2e0197e51ec687f52e48ef3ccb61b584e642f39b6b3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b33769fb506da81ef0b13fdf098b6f51538fbf74598a313cb165c8adf6b253ca
[INFO] running `Command { std: "docker" "start" "-a" "b33769fb506da81ef0b13fdf098b6f51538fbf74598a313cb165c8adf6b253ca", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.26
[INFO] [stderr]    Compiling libc v0.2.94
[INFO] [stderr]    Compiling syn v1.0.71
[INFO] [stderr]    Compiling miniz_oxide v0.4.4
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]    Compiling backtrace v0.3.58
[INFO] [stderr]    Compiling gimli v0.23.0
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]    Compiling adler v1.0.2
[INFO] [stderr]    Compiling rustc-demangle v0.1.18
[INFO] [stderr]    Compiling unicode-width v0.1.8
[INFO] [stderr]    Compiling object v0.23.0
[INFO] [stderr]    Compiling regex-syntax v0.6.24
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling aho-corasick v0.7.18
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling strsim v0.8.0
[INFO] [stderr]    Compiling ansi_term v0.11.0
[INFO] [stderr]    Compiling hambands v0.1.2
[INFO] [stderr]    Compiling vec_map v0.8.2
[INFO] [stderr]    Compiling pad v0.1.6
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling nix v0.20.0
[INFO] [stderr]    Compiling addr2line v0.14.1
[INFO] [stderr]    Compiling colored v2.0.0
[INFO] [stderr]    Compiling clap v2.33.3
[INFO] [stderr]    Compiling regex v1.5.2
[INFO] [stderr]    Compiling synstructure v0.12.4
[INFO] [stderr]    Compiling serde_derive v1.0.125
[INFO] [stderr]    Compiling failure v0.1.8
[INFO] [stderr]    Compiling ctrlc v3.1.9
[INFO] [stderr]    Compiling serde v1.0.125
[INFO] [stderr]    Compiling rbn-lib v0.1.4
[INFO] [stderr]    Compiling rbn v0.1.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 46.42s
[INFO] running `Command { std: "docker" "inspect" "b33769fb506da81ef0b13fdf098b6f51538fbf74598a313cb165c8adf6b253ca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b33769fb506da81ef0b13fdf098b6f51538fbf74598a313cb165c8adf6b253ca", kill_on_drop: false }`
[INFO] [stdout] b33769fb506da81ef0b13fdf098b6f51538fbf74598a313cb165c8adf6b253ca
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 90e20cb131bf826b71dadf765deb8a1c344de098136debb7211d1e3f7c291da9
[INFO] running `Command { std: "docker" "start" "-a" "90e20cb131bf826b71dadf765deb8a1c344de098136debb7211d1e3f7c291da9", kill_on_drop: false }`
[INFO] [stderr]    Compiling rbn v0.1.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.59s
[INFO] running `Command { std: "docker" "inspect" "90e20cb131bf826b71dadf765deb8a1c344de098136debb7211d1e3f7c291da9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "90e20cb131bf826b71dadf765deb8a1c344de098136debb7211d1e3f7c291da9", kill_on_drop: false }`
[INFO] [stdout] 90e20cb131bf826b71dadf765deb8a1c344de098136debb7211d1e3f7c291da9