[INFO] cloning repository https://github.com/sergey-shandar/serde-json-test
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sergey-shandar/serde-json-test" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsergey-shandar%2Fserde-json-test", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsergey-shandar%2Fserde-json-test'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d385052ad6f687451759f27c65b4483aaf6f1975
[INFO] checking sergey-shandar/serde-json-test against try#e90f1ff63e694965281f833819a486da29772bdf for pr-146167
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsergey-shandar%2Fserde-json-test" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/sergey-shandar/serde-json-test
[INFO] finished tweaking git repo https://github.com/sergey-shandar/serde-json-test
[INFO] tweaked toml for git repo https://github.com/sergey-shandar/serde-json-test written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/sergey-shandar/serde-json-test on toolchain e90f1ff63e694965281f833819a486da29772bdf
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+e90f1ff63e694965281f833819a486da29772bdf" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/sergey-shandar/serde-json-test 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" "+e90f1ff63e694965281f833819a486da29772bdf" "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-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+e90f1ff63e694965281f833819a486da29772bdf" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b29d0aedd040be01bcf3f94d4150ad10c20f4d4f55c37a0c44a191af60357367
[INFO] running `Command { std: "docker" "start" "-a" "b29d0aedd040be01bcf3f94d4150ad10c20f4d4f55c37a0c44a191af60357367", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b29d0aedd040be01bcf3f94d4150ad10c20f4d4f55c37a0c44a191af60357367", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b29d0aedd040be01bcf3f94d4150ad10c20f4d4f55c37a0c44a191af60357367", kill_on_drop: false }`
[INFO] [stdout] b29d0aedd040be01bcf3f94d4150ad10c20f4d4f55c37a0c44a191af60357367
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+e90f1ff63e694965281f833819a486da29772bdf" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7625d24bc3f386f255116b1f0e8755d01e2464d1f6678211f60ff742fbdbb9ae
[INFO] running `Command { std: "docker" "start" "-a" "7625d24bc3f386f255116b1f0e8755d01e2464d1f6678211f60ff742fbdbb9ae", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.101
[INFO] [stderr]    Compiling quote v1.0.40
[INFO] [stderr]    Compiling syn v2.0.106
[INFO] [stderr]    Compiling serde_derive v1.0.219
[INFO] [stderr]     Checking serde v1.0.219
[INFO] [stderr]     Checking serde_json v1.0.143
[INFO] [stderr]     Checking serde-json-test v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `parse_item` is never used
[INFO] [stdout]   --> src/main.rs:11:4
[INFO] [stdout]    |
[INFO] [stdout] 11 | fn parse_item(json: &str) -> Item {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `parse_item` is never used
[INFO] [stdout]   --> src/main.rs:11:4
[INFO] [stdout]    |
[INFO] [stdout] 11 | fn parse_item(json: &str) -> Item {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 9.21s
[INFO] running `Command { std: "docker" "inspect" "7625d24bc3f386f255116b1f0e8755d01e2464d1f6678211f60ff742fbdbb9ae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7625d24bc3f386f255116b1f0e8755d01e2464d1f6678211f60ff742fbdbb9ae", kill_on_drop: false }`
[INFO] [stdout] 7625d24bc3f386f255116b1f0e8755d01e2464d1f6678211f60ff742fbdbb9ae