[INFO] fetching crate autojson 0.1.0...
[INFO] checking autojson-0.1.0 against try#3d9fdbff4f377de96b3a51174e7a64086bee9a5c for pr-81477
[INFO] extracting crate autojson 0.1.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate autojson 0.1.0 on toolchain 3d9fdbff4f377de96b3a51174e7a64086bee9a5c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate autojson 0.1.0
[INFO] finished tweaking crates.io crate autojson 0.1.0
[INFO] tweaked toml for crates.io crate autojson 0.1.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "fetch" "--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d0e580214cb6a7458bb970eafadcfb041311c9650550b9de0dcdbb76fb6aa92d
[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" "d0e580214cb6a7458bb970eafadcfb041311c9650550b9de0dcdbb76fb6aa92d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d0e580214cb6a7458bb970eafadcfb041311c9650550b9de0dcdbb76fb6aa92d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d0e580214cb6a7458bb970eafadcfb041311c9650550b9de0dcdbb76fb6aa92d", kill_on_drop: false }`
[INFO] [stdout] d0e580214cb6a7458bb970eafadcfb041311c9650550b9de0dcdbb76fb6aa92d
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e60f62c9f6bf86cc566a114ec9a4fd18efc22d65ee96298ca878779f25621a2e
[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" "e60f62c9f6bf86cc566a114ec9a4fd18efc22d65ee96298ca878779f25621a2e", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.73
[INFO] [stderr]    Compiling serde_json v1.0.64
[INFO] [stderr]     Checking itoa v0.4.7
[INFO] [stderr]    Compiling miniz_oxide v0.4.4
[INFO] [stderr]    Compiling backtrace v0.3.60
[INFO] [stderr]     Checking object v0.25.3
[INFO] [stderr]    Compiling synstructure v0.12.4
[INFO] [stderr]    Compiling serde_derive v1.0.126
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]     Checking serde v1.0.126
[INFO] [stderr]     Checking autojson v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `from_json`
[INFO] [stdout]   --> src/lib.rs:24:13
[INFO] [stdout]    |
[INFO] [stdout] 24 |             fn from_json<P: AsRef<std::path::Path>>(path: P) -> Result<Self, failure::Error> {
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 47 |     auto_json_impl!(Data);
[INFO] [stdout]    |     ---------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout]    = note: this warning originates in the macro `auto_json_impl` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `to_json`
[INFO] [stdout]   --> src/lib.rs:28:13
[INFO] [stdout]    |
[INFO] [stdout] 28 |             fn to_json<P: AsRef<std::path::Path>>(&self, path: P) -> Result<(), failure::Error> {
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 47 |     auto_json_impl!(Data);
[INFO] [stdout]    |     ---------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `auto_json_impl` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 20.23s
[INFO] running `Command { std: "docker" "inspect" "e60f62c9f6bf86cc566a114ec9a4fd18efc22d65ee96298ca878779f25621a2e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e60f62c9f6bf86cc566a114ec9a4fd18efc22d65ee96298ca878779f25621a2e", kill_on_drop: false }`
[INFO] [stdout] e60f62c9f6bf86cc566a114ec9a4fd18efc22d65ee96298ca878779f25621a2e