[INFO] fetching crate backplane 0.0.4...
[INFO] checking backplane-0.0.4 against 1.55.0 for beta-1.56-3
[INFO] extracting crate backplane 0.0.4 into /workspace/builds/worker-87/source
[INFO] validating manifest of crates.io crate backplane 0.0.4 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate backplane 0.0.4
[INFO] finished tweaking crates.io crate backplane 0.0.4
[INFO] tweaked toml for crates.io crate backplane 0.0.4 written to /workspace/builds/worker-87/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "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-87/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-87/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 75529e98a25746f8361f2fa29ae98bd3cf5cca2f3d6dfc9c74a171bd0eb56546
[INFO] running `Command { std: "docker" "start" "-a" "75529e98a25746f8361f2fa29ae98bd3cf5cca2f3d6dfc9c74a171bd0eb56546", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "75529e98a25746f8361f2fa29ae98bd3cf5cca2f3d6dfc9c74a171bd0eb56546", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "75529e98a25746f8361f2fa29ae98bd3cf5cca2f3d6dfc9c74a171bd0eb56546", kill_on_drop: false }`
[INFO] [stdout] 75529e98a25746f8361f2fa29ae98bd3cf5cca2f3d6dfc9c74a171bd0eb56546
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-87/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-87/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" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 67c0e28ed1298b3b945af064e8449c8e6149137d8a8c0ed981b1a4f5eb256a23
[INFO] running `Command { std: "docker" "start" "-a" "67c0e28ed1298b3b945af064e8449c8e6149137d8a8c0ed981b1a4f5eb256a23", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling serde v1.0.130
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling num-derive v0.2.5
[INFO] [stderr]     Checking itoa v0.4.8
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling num-bigint v0.2.6
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]    Compiling num-rational v0.2.4
[INFO] [stderr]    Compiling num-complex v0.2.4
[INFO] [stderr]     Checking bytes v0.4.12
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking num v0.2.1
[INFO] [stderr]     Checking serde_json v1.0.68
[INFO] [stderr]     Checking backplane v0.0.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]    --> src/lib.rs:491:28
[INFO] [stdout]     |
[INFO] [stdout] 491 |         fmt.write_str(self.description())
[INFO] [stdout]     |                            ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]    --> src/lib.rs:491:28
[INFO] [stdout]     |
[INFO] [stdout] 491 |         fmt.write_str(self.description())
[INFO] [stdout]     |                            ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 14.48s
[INFO] running `Command { std: "docker" "inspect" "67c0e28ed1298b3b945af064e8449c8e6149137d8a8c0ed981b1a4f5eb256a23", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "67c0e28ed1298b3b945af064e8449c8e6149137d8a8c0ed981b1a4f5eb256a23", kill_on_drop: false }`
[INFO] [stdout] 67c0e28ed1298b3b945af064e8449c8e6149137d8a8c0ed981b1a4f5eb256a23
