[INFO] fetching crate serde_ubjson 0.2.1...
[INFO] checking serde_ubjson-0.2.1 against master#90442458ac46b1d5eed752c316da25450f67285b for pr-81477
[INFO] extracting crate serde_ubjson 0.2.1 into /workspace/builds/worker-15/source
[INFO] validating manifest of crates.io crate serde_ubjson 0.2.1 on toolchain 90442458ac46b1d5eed752c316da25450f67285b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate serde_ubjson 0.2.1
[INFO] finished tweaking crates.io crate serde_ubjson 0.2.1
[INFO] tweaked toml for crates.io crate serde_ubjson 0.2.1 written to /workspace/builds/worker-15/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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:ea7d7bff36b2ba8ce4de8bba1d2dea90376bc481f1a945a913994a8c492e40c1" "/opt/rustwide/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2b17ec47a6e3b1d551682ca23ad0556131632f076ba2c639669f6ffdbd6bec81
[INFO] running `Command { std: "docker" "start" "-a" "2b17ec47a6e3b1d551682ca23ad0556131632f076ba2c639669f6ffdbd6bec81", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2b17ec47a6e3b1d551682ca23ad0556131632f076ba2c639669f6ffdbd6bec81", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2b17ec47a6e3b1d551682ca23ad0556131632f076ba2c639669f6ffdbd6bec81", kill_on_drop: false }`
[INFO] [stdout] 2b17ec47a6e3b1d551682ca23ad0556131632f076ba2c639669f6ffdbd6bec81
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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" "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:ea7d7bff36b2ba8ce4de8bba1d2dea90376bc481f1a945a913994a8c492e40c1" "/opt/rustwide/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9d47b6d8bf420210c0431d4946a3f263f8cc9e1c2e473fe0d3743aa52822495c
[INFO] running `Command { std: "docker" "start" "-a" "9d47b6d8bf420210c0431d4946a3f263f8cc9e1c2e473fe0d3743aa52822495c", kill_on_drop: false }`
[INFO] [stderr]     Checking serde_bytes v0.10.5
[INFO] [stderr]     Checking serde_ubjson v0.2.1 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling syn v1.0.73
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/error.rs:18:29
[INFO] [stdout]    |
[INFO] [stdout] 18 |         formatter.write_str(std::error::Error::description(self))
[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/error.rs:26:39
[INFO] [stdout]    |
[INFO] [stdout] 26 |             Error::Io(ref err) => err.description(),
[INFO] [stdout]    |                                       ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling serde_derive v1.0.126
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/error.rs:18:29
[INFO] [stdout]    |
[INFO] [stdout] 18 |         formatter.write_str(std::error::Error::description(self))
[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/error.rs:26:39
[INFO] [stdout]    |
[INFO] [stdout] 26 |             Error::Io(ref err) => err.description(),
[INFO] [stdout]    |                                       ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 10.16s
[INFO] running `Command { std: "docker" "inspect" "9d47b6d8bf420210c0431d4946a3f263f8cc9e1c2e473fe0d3743aa52822495c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9d47b6d8bf420210c0431d4946a3f263f8cc9e1c2e473fe0d3743aa52822495c", kill_on_drop: false }`
[INFO] [stdout] 9d47b6d8bf420210c0431d4946a3f263f8cc9e1c2e473fe0d3743aa52822495c