[INFO] cloning repository alexeyden/rust-experiments
[INFO] running `"git" "clone" "--bare" "git://github.com/alexeyden/rust-experiments.git" "work/cache/sources/gh/alexeyden/rust-experiments"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/alexeyden/rust-experiments'...
[INFO] running `"git" "clone" "work/cache/sources/gh/alexeyden/rust-experiments" "work/ex/pr-61874/sources/master#9f06855064ed06a50c496577b21ca50f92a2e67d/gh/alexeyden/rust-experiments"`
[INFO] [stderr] Cloning into 'work/ex/pr-61874/sources/master#9f06855064ed06a50c496577b21ca50f92a2e67d/gh/alexeyden/rust-experiments'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/alexeyden/rust-experiments" "work/ex/pr-61874/sources/try#d3301713b54af69ca9de941a8c6b0d8287dbd6df/gh/alexeyden/rust-experiments"`
[INFO] [stderr] Cloning into 'work/ex/pr-61874/sources/try#d3301713b54af69ca9de941a8c6b0d8287dbd6df/gh/alexeyden/rust-experiments'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] f01e50da7a04d7323f7e99a977cd536544231779
[INFO] sha for GitHub repo alexeyden/rust-experiments: f01e50da7a04d7323f7e99a977cd536544231779
[INFO] validating manifest of alexeyden/rust-experiments on toolchain master#9f06855064ed06a50c496577b21ca50f92a2e67d
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+9f06855064ed06a50c496577b21ca50f92a2e67d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of alexeyden/rust-experiments on toolchain try#d3301713b54af69ca9de941a8c6b0d8287dbd6df
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+d3301713b54af69ca9de941a8c6b0d8287dbd6df-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing alexeyden/rust-experiments
[INFO] finished frobbing alexeyden/rust-experiments
[INFO] frobbed toml for alexeyden/rust-experiments written to work/ex/pr-61874/sources/master#9f06855064ed06a50c496577b21ca50f92a2e67d/gh/alexeyden/rust-experiments/Cargo.toml
[INFO] started frobbing alexeyden/rust-experiments
[INFO] finished frobbing alexeyden/rust-experiments
[INFO] frobbed toml for alexeyden/rust-experiments written to work/ex/pr-61874/sources/try#d3301713b54af69ca9de941a8c6b0d8287dbd6df/gh/alexeyden/rust-experiments/Cargo.toml
[INFO] crate alexeyden/rust-experiments already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+9f06855064ed06a50c496577b21ca50f92a2e67d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+d3301713b54af69ca9de941a8c6b0d8287dbd6df-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking alexeyden/rust-experiments against master#9f06855064ed06a50c496577b21ca50f92a2e67d for pr-61874
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-61874/worker-4/master#9f06855064ed06a50c496577b21ca50f92a2e67d:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-61874/sources/master#9f06855064ed06a50c496577b21ca50f92a2e67d/gh/alexeyden/rust-experiments:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+9f06855064ed06a50c496577b21ca50f92a2e67d-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 706819dfa06fa6cfa6fad511e79c839395a9f35ef2b70da88a9727af4241cccf
[INFO] running `"docker" "start" "-a" "706819dfa06fa6cfa6fad511e79c839395a9f35ef2b70da88a9727af4241cccf"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] [stderr]    Compiling sdl2-sys v0.27.2 (https://github.com/AngryLawyer/rust-sdl2#5d8c8632)
[INFO] [stderr]     Checking sdl2 v0.29.0 (https://github.com/AngryLawyer/rust-sdl2#5d8c8632)
[INFO] [stderr]     Checking raster v0.1.0 (/opt/crater/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]     Finished dev [unoptimized + debuginfo] target(s) in 6.18s
[INFO] running `"docker" "inspect" "706819dfa06fa6cfa6fad511e79c839395a9f35ef2b70da88a9727af4241cccf"`
[INFO] running `"docker" "rm" "-f" "706819dfa06fa6cfa6fad511e79c839395a9f35ef2b70da88a9727af4241cccf"`
[INFO] [stdout] 706819dfa06fa6cfa6fad511e79c839395a9f35ef2b70da88a9727af4241cccf