[INFO] fetching crate nes_rust 0.1.2...
[INFO] checking nes_rust-0.1.2 against try#45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4 for pr-83744
[INFO] extracting crate nes_rust 0.1.2 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate nes_rust 0.1.2 on toolchain 45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate nes_rust 0.1.2
[INFO] finished tweaking crates.io crate nes_rust 0.1.2
[INFO] tweaked toml for crates.io crate nes_rust 0.1.2 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "fetch" "--locked" "--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-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "rustops/crates-build-env@sha256:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 28b0b1b0f704c5b9c60a6ddc78308390b421ffd4ffbe672d5cd88eb57dc8f61b
[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" "28b0b1b0f704c5b9c60a6ddc78308390b421ffd4ffbe672d5cd88eb57dc8f61b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "28b0b1b0f704c5b9c60a6ddc78308390b421ffd4ffbe672d5cd88eb57dc8f61b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "28b0b1b0f704c5b9c60a6ddc78308390b421ffd4ffbe672d5cd88eb57dc8f61b", kill_on_drop: false }`
[INFO] [stdout] 28b0b1b0f704c5b9c60a6ddc78308390b421ffd4ffbe672d5cd88eb57dc8f61b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "rustops/crates-build-env@sha256:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 31e6eb88dcc6b6dec5e42091b9b5e1f72347e90c045320cb0a684fb1833bf7f6
[INFO] running `Command { std: "docker" "start" "-a" "31e6eb88dcc6b6dec5e42091b9b5e1f72347e90c045320cb0a684fb1833bf7f6", kill_on_drop: false }`
[INFO] [stderr]     Checking nes_rust v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `r`
[INFO] [stdout]    --> src/rom.rs:200:7
[INFO] [stdout]     |
[INFO] [stdout] 200 |         let r = Rom::new(vec![0; 17]);
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_r`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `enabled`
[INFO] [stdout]    --> src/apu.rs:885:2
[INFO] [stdout]     |
[INFO] [stdout] 885 |     enabled: bool,
[INFO] [stdout]     |     ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `enabled`
[INFO] [stdout]    --> src/apu.rs:885:2
[INFO] [stdout]     |
[INFO] [stdout] 885 |     enabled: bool,
[INFO] [stdout]     |     ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.18s
[INFO] running `Command { std: "docker" "inspect" "31e6eb88dcc6b6dec5e42091b9b5e1f72347e90c045320cb0a684fb1833bf7f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "31e6eb88dcc6b6dec5e42091b9b5e1f72347e90c045320cb0a684fb1833bf7f6", kill_on_drop: false }`
[INFO] [stdout] 31e6eb88dcc6b6dec5e42091b9b5e1f72347e90c045320cb0a684fb1833bf7f6