[INFO] updating cached repository https://github.com/alexeyden/rust-experiments
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] f01e50da7a04d7323f7e99a977cd536544231779
[INFO] checking alexeyden/rust-experiments against master#45d050cde277b22a755847338f2acc2c7b834141 for pr-71393
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falexeyden%2Frust-experiments" "/workspace/builds/worker-4/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/alexeyden/rust-experiments on toolchain 45d050cde277b22a755847338f2acc2c7b834141
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/alexeyden/rust-experiments
[INFO] finished tweaking git repo https://github.com/alexeyden/rust-experiments
[INFO] tweaked toml for git repo https://github.com/alexeyden/rust-experiments written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/alexeyden/rust-experiments already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 9e506e7b109ac9463c60f17e840cde9d887d810e40324da55df5e90da22b90c5
[INFO] running `"docker" "start" "-a" "9e506e7b109ac9463c60f17e840cde9d887d810e40324da55df5e90da22b90c5"`
[INFO] [stderr]    Compiling sdl2-sys v0.27.2 (https://github.com/AngryLawyer/rust-sdl2#5d8c8632)
[INFO] [stderr]     Checking serde v0.9.11
[INFO] [stderr]     Checking lazy_static v0.2.4
[INFO] [stderr]     Checking num-integer v0.1.33
[INFO] [stderr]    Compiling syn v0.11.9
[INFO] [stderr]     Checking num-iter v0.1.33
[INFO] [stderr]     Checking num v0.1.37
[INFO] [stderr]     Checking sdl2 v0.29.0 (https://github.com/AngryLawyer/rust-sdl2#5d8c8632)
[INFO] [stderr]    Compiling serde_codegen_internals v0.14.1
[INFO] [stderr]    Compiling serde_derive v0.9.11
[INFO] [stderr]     Checking serde_json v0.9.9
[INFO] [stderr]     Checking raster v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: the item `serde_json` is imported redundantly
[INFO] [stderr]   --> src/game.rs:28:9
[INFO] [stderr]    |
[INFO] [stderr] 28 |     use serde_json;
[INFO] [stderr]    |         ^^^^^^^^^^
[INFO] [stderr]    | 
[INFO] [stderr]   ::: src/main.rs:2:1
[INFO] [stderr]    |
[INFO] [stderr] 2  | extern crate serde_json;
[INFO] [stderr]    | ------------------------ the item `serde_json` is already imported here
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: the item `serde_json` is imported redundantly
[INFO] [stderr]   --> src/game.rs:28:9
[INFO] [stderr]    |
[INFO] [stderr] 28 |     use serde_json;
[INFO] [stderr]    |         ^^^^^^^^^^
[INFO] [stderr]    | 
[INFO] [stderr]   ::: src/main.rs:2:1
[INFO] [stderr]    |
[INFO] [stderr] 2  | extern crate serde_json;
[INFO] [stderr]    | ------------------------ the item `serde_json` is already imported here
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 22.56s
[INFO] running `"docker" "inspect" "9e506e7b109ac9463c60f17e840cde9d887d810e40324da55df5e90da22b90c5"`
[INFO] running `"docker" "rm" "-f" "9e506e7b109ac9463c60f17e840cde9d887d810e40324da55df5e90da22b90c5"`
[INFO] [stdout] 9e506e7b109ac9463c60f17e840cde9d887d810e40324da55df5e90da22b90c5