[INFO] cloning repository https://github.com/alexeyden/rust-experiments
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/alexeyden/rust-experiments" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falexeyden%2Frust-experiments", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falexeyden%2Frust-experiments'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f01e50da7a04d7323f7e99a977cd536544231779
[INFO] checking alexeyden/rust-experiments against master#836c31742687ba4e2f857b5b698e1e9e6b67619c for pr-81789
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falexeyden%2Frust-experiments" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/alexeyden/rust-experiments on toolchain 836c31742687ba4e2f857b5b698e1e9e6b67619c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+836c31742687ba4e2f857b5b698e1e9e6b67619c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[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-3/source/Cargo.toml
[INFO] crate git repo https://github.com/alexeyden/rust-experiments already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+836c31742687ba4e2f857b5b698e1e9e6b67619c" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "+836c31742687ba4e2f857b5b698e1e9e6b67619c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2aa0d2215f92331035e8b9e441237a9f4b0aa7fbf373a08a81a3ee5ad69fd3cc
[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" "2aa0d2215f92331035e8b9e441237a9f4b0aa7fbf373a08a81a3ee5ad69fd3cc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2aa0d2215f92331035e8b9e441237a9f4b0aa7fbf373a08a81a3ee5ad69fd3cc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2aa0d2215f92331035e8b9e441237a9f4b0aa7fbf373a08a81a3ee5ad69fd3cc", kill_on_drop: false }`
[INFO] [stdout] 2aa0d2215f92331035e8b9e441237a9f4b0aa7fbf373a08a81a3ee5ad69fd3cc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "+836c31742687ba4e2f857b5b698e1e9e6b67619c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7f0ba260a06227650e063ce8956f6e1fa19d3426d1cb953a54ef3a8685d7910f
[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" "7f0ba260a06227650e063ce8956f6e1fa19d3426d1cb953a54ef3a8685d7910f", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling unicode-xid v0.0.4
[INFO] [stderr]     Checking libc v0.2.21
[INFO] [stderr]    Compiling sdl2-sys v0.27.2 (https://github.com/AngryLawyer/rust-sdl2#5d8c8632)
[INFO] [stderr]    Compiling quote v0.3.15
[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 synom v0.11.3
[INFO] [stderr]     Checking num-iter v0.1.33
[INFO] [stderr]     Checking rand v0.3.15
[INFO] [stderr]     Checking num v0.1.37
[INFO] [stderr]    Compiling syn v0.11.9
[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] [stdout] warning: the item `serde_json` is imported redundantly
[INFO] [stdout]   --> src/game.rs:28:9
[INFO] [stdout]    |
[INFO] [stdout] 28 |     use serde_json;
[INFO] [stdout]    |         ^^^^^^^^^^
[INFO] [stdout]    | 
[INFO] [stdout]   ::: src/main.rs:2:1
[INFO] [stdout]    |
[INFO] [stdout] 2  | extern crate serde_json;
[INFO] [stdout]    | ------------------------ the item `serde_json` is already imported here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `serde_json` is imported redundantly
[INFO] [stdout]   --> src/game.rs:28:9
[INFO] [stdout]    |
[INFO] [stdout] 28 |     use serde_json;
[INFO] [stdout]    |         ^^^^^^^^^^
[INFO] [stdout]    | 
[INFO] [stdout]   ::: src/main.rs:2:1
[INFO] [stdout]    |
[INFO] [stdout] 2  | extern crate serde_json;
[INFO] [stdout]    | ------------------------ the item `serde_json` is already imported here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.47s
[INFO] running `Command { std: "docker" "inspect" "7f0ba260a06227650e063ce8956f6e1fa19d3426d1cb953a54ef3a8685d7910f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7f0ba260a06227650e063ce8956f6e1fa19d3426d1cb953a54ef3a8685d7910f", kill_on_drop: false }`
[INFO] [stdout] 7f0ba260a06227650e063ce8956f6e1fa19d3426d1cb953a54ef3a8685d7910f