[INFO] crate rspotify 0.7.0 is already in cache
[INFO] checking rspotify-0.7.0 against try#1a608893c03d7722effeb0058e82770bd36b4b3c for pr-66504-1
[INFO] extracting crate rspotify 0.7.0 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate rspotify 0.7.0 on toolchain 1a608893c03d7722effeb0058e82770bd36b4b3c
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1a608893c03d7722effeb0058e82770bd36b4b3c" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate rspotify 0.7.0
[INFO] finished tweaking crates.io crate rspotify 0.7.0
[INFO] tweaked toml for crates.io crate rspotify 0.7.0 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate crates.io crate rspotify 0.7.0 already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1a608893c03d7722effeb0058e82770bd36b4b3c" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "+1a608893c03d7722effeb0058e82770bd36b4b3c" "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] 1f600ed55ebd5b4e50ba9bdab6ce9c26c5d9548b0cd0c70b84d96f3ffcca9e50
[INFO] running `"docker" "start" "-a" "1f600ed55ebd5b4e50ba9bdab6ce9c26c5d9548b0cd0c70b84d96f3ffcca9e50"`
[INFO] [stderr]    Compiling libc v0.2.48
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[INFO] [stderr]     Checking rspotify v0.7.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> tests/test_with_oauth.rs:661:17
[INFO] [stderr]     |
[INFO] [stderr] 661 |             let mut uris = vec!["spotify:track:4iV5W9uYEdYUVa79Axb7Rh".to_owned()];
[INFO] [stderr]     |                 ----^^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> tests/test_with_oauth.rs:824:17
[INFO] [stderr]     |
[INFO] [stderr] 824 |             let mut playlist_name = "A New Playlist-update";
[INFO] [stderr]     |                 ----^^^^^^^^^^^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> examples/start_playback.rs:40:17
[INFO] [stderr]    |
[INFO] [stderr] 40 |             let mut uris = vec!["spotify:track:4iV5W9uYEdYUVa79Axb7Rh".to_owned()];
[INFO] [stderr]    |                 ----^^^^
[INFO] [stderr]    |                 |
[INFO] [stderr]    |                 help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> examples/user_playlist_change_detail.rs:40:17
[INFO] [stderr]    |
[INFO] [stderr] 40 |             let mut playlist_name = "A New Playlist-update";
[INFO] [stderr]    |                 ----^^^^^^^^^^^^^
[INFO] [stderr]    |                 |
[INFO] [stderr]    |                 help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 23s
[INFO] running `"docker" "inspect" "1f600ed55ebd5b4e50ba9bdab6ce9c26c5d9548b0cd0c70b84d96f3ffcca9e50"`
[INFO] running `"docker" "rm" "-f" "1f600ed55ebd5b4e50ba9bdab6ce9c26c5d9548b0cd0c70b84d96f3ffcca9e50"`
[INFO] [stdout] 1f600ed55ebd5b4e50ba9bdab6ce9c26c5d9548b0cd0c70b84d96f3ffcca9e50