[INFO] cloning repository https://github.com/vthib/serde-iop
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/vthib/serde-iop" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvthib%2Fserde-iop", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvthib%2Fserde-iop'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c1f7eeb18a673b4c96ab0711615d82373d26d3d1
[INFO] checking vthib/serde-iop against beta for pr-78714
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvthib%2Fserde-iop" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/vthib/serde-iop on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/vthib/serde-iop
[INFO] finished tweaking git repo https://github.com/vthib/serde-iop
[INFO] tweaked toml for git repo https://github.com/vthib/serde-iop written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/vthib/serde-iop already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 505e4ea2cd95b3c3ecc9553b4a7b187b6c97bd6c8346204469543517f0acb447
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "505e4ea2cd95b3c3ecc9553b4a7b187b6c97bd6c8346204469543517f0acb447", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "505e4ea2cd95b3c3ecc9553b4a7b187b6c97bd6c8346204469543517f0acb447", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "505e4ea2cd95b3c3ecc9553b4a7b187b6c97bd6c8346204469543517f0acb447", kill_on_drop: false }`
[INFO] [stdout] 505e4ea2cd95b3c3ecc9553b4a7b187b6c97bd6c8346204469543517f0acb447
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 6751797dc36daa35c16a8ed9835d353d970ce483cf71d0cbc870ba28fe3e5a33
[INFO] running `Command { std: "docker" "start" "-a" "6751797dc36daa35c16a8ed9835d353d970ce483cf71d0cbc870ba28fe3e5a33", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.11
[INFO] [stderr]    Compiling serde v1.0.104
[INFO] [stderr]    Compiling serde_derive v1.0.104
[INFO] [stderr]     Checking serde-iop v0.1.0 (/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/error.rs:20:57
[INFO] [stdout]    |
[INFO] [stdout] 20 |             Error::MissingTag => write!(fmt, "{}", 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/error.rs:21:57
[INFO] [stdout]    |
[INFO] [stdout] 21 |             Error::UnknownLen => write!(fmt, "{}", self.description()),
[INFO] [stdout]    |                                                         ^^^^^^^^^^^
[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:22:60
[INFO] [stdout]    |
[INFO] [stdout] 22 |             Error::InputTooShort => write!(fmt, "{}", self.description()),
[INFO] [stdout]    |                                                            ^^^^^^^^^^^
[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:23:62
[INFO] [stdout]    |
[INFO] [stdout] 23 |             Error::InvalidEncoding => write!(fmt, "{}", self.description()),
[INFO] [stdout]    |                                                              ^^^^^^^^^^^
[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:24:65
[INFO] [stdout]    |
[INFO] [stdout] 24 |             Error::TrailingCharacters => write!(fmt, "{}", self.description()),
[INFO] [stdout]    |                                                                 ^^^^^^^^^^^
[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:20:57
[INFO] [stdout]    |
[INFO] [stdout] 20 |             Error::MissingTag => write!(fmt, "{}", 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/error.rs:21:57
[INFO] [stdout]    |
[INFO] [stdout] 21 |             Error::UnknownLen => write!(fmt, "{}", self.description()),
[INFO] [stdout]    |                                                         ^^^^^^^^^^^
[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:22:60
[INFO] [stdout]    |
[INFO] [stdout] 22 |             Error::InputTooShort => write!(fmt, "{}", self.description()),
[INFO] [stdout]    |                                                            ^^^^^^^^^^^
[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:23:62
[INFO] [stdout]    |
[INFO] [stdout] 23 |             Error::InvalidEncoding => write!(fmt, "{}", self.description()),
[INFO] [stdout]    |                                                              ^^^^^^^^^^^
[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:24:65
[INFO] [stdout]    |
[INFO] [stdout] 24 |             Error::TrailingCharacters => write!(fmt, "{}", self.description()),
[INFO] [stdout]    |                                                                 ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 29.99s
[INFO] running `Command { std: "docker" "inspect" "6751797dc36daa35c16a8ed9835d353d970ce483cf71d0cbc870ba28fe3e5a33", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6751797dc36daa35c16a8ed9835d353d970ce483cf71d0cbc870ba28fe3e5a33", kill_on_drop: false }`
[INFO] [stdout] 6751797dc36daa35c16a8ed9835d353d970ce483cf71d0cbc870ba28fe3e5a33