[INFO] cloning repository https://github.com/fiftythree/mpd-spotify-cover
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/fiftythree/mpd-spotify-cover" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffiftythree%2Fmpd-spotify-cover", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffiftythree%2Fmpd-spotify-cover'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 117fa619d1e5dd26e08aa8d0051ff2208aa846a2
[INFO] checking fiftythree/mpd-spotify-cover against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffiftythree%2Fmpd-spotify-cover" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/fiftythree/mpd-spotify-cover on toolchain ceab6128fa48a616bfd3e3adf4bc80133b8ee223
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/fiftythree/mpd-spotify-cover
[INFO] finished tweaking git repo https://github.com/fiftythree/mpd-spotify-cover
[INFO] tweaked toml for git repo https://github.com/fiftythree/mpd-spotify-cover written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/fiftythree/mpd-spotify-cover already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded num_threads v0.1.5
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 607abecb347967d6a2ea8d0435f0d15bd0166d9efaca2ca4f82a92a259c1df94
[INFO] running `Command { std: "docker" "start" "-a" "607abecb347967d6a2ea8d0435f0d15bd0166d9efaca2ca4f82a92a259c1df94", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "607abecb347967d6a2ea8d0435f0d15bd0166d9efaca2ca4f82a92a259c1df94", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "607abecb347967d6a2ea8d0435f0d15bd0166d9efaca2ca4f82a92a259c1df94", kill_on_drop: false }`
[INFO] [stdout] 607abecb347967d6a2ea8d0435f0d15bd0166d9efaca2ca4f82a92a259c1df94
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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" "RUSTDOCFLAGS=--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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b799bb4b48f114d284ab72e4cac9649df7b538a98828cda154bff98b0006de0d
[INFO] running `Command { std: "docker" "start" "-a" "b799bb4b48f114d284ab72e4cac9649df7b538a98828cda154bff98b0006de0d", kill_on_drop: false }`
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[INFO] [stderr]    Compiling proc-macro2 v1.0.37
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[INFO] [stderr]    Compiling serde_derive v1.0.136
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[INFO] [stderr]    Compiling openssl v0.10.38
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[INFO] [stderr]    Compiling serde v1.0.136
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[INFO] [stderr]     Checking spotify-track-cover v1.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `name` is never read
[INFO] [stdout]  --> src/spotify_api.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub struct Album {
[INFO] [stdout]   |            ----- field in this struct
[INFO] [stdout] 9 |     pub name: String,
[INFO] [stdout]   |         ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Album` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `href` is never read
[INFO] [stdout]   --> src/spotify_api.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 31 | pub struct SearchResult<T> {
[INFO] [stdout]    |            ------------ field in this struct
[INFO] [stdout] 32 |     pub href: String,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `id` is never read
[INFO] [stdout]   --> src/spotify_api.rs:40:9
[INFO] [stdout]    |
[INFO] [stdout] 37 | pub struct Track {
[INFO] [stdout]    |            ----- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 40 |     pub id: String,
[INFO] [stdout]    |         ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `token_type` is never read
[INFO] [stdout]   --> src/spotify_api.rs:49:9
[INFO] [stdout]    |
[INFO] [stdout] 45 | pub struct ExchangeCodeResponse {
[INFO] [stdout]    |            -------------------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 49 |     pub token_type: String,
[INFO] [stdout]    |         ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `scope` and `token_type` are never read
[INFO] [stdout]   --> src/spotify_api.rs:55:9
[INFO] [stdout]    |
[INFO] [stdout] 53 | pub struct RefreshTokenResponse {
[INFO] [stdout]    |            -------------------- fields in this struct
[INFO] [stdout] 54 |     pub access_token: String,
[INFO] [stdout] 55 |     pub scope: String,
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout] 56 |     pub expires_in: i64,
[INFO] [stdout] 57 |     pub token_type: String,
[INFO] [stdout]    |         ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `name` is never read
[INFO] [stdout]  --> src/spotify_api.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub struct Album {
[INFO] [stdout]   |            ----- field in this struct
[INFO] [stdout] 9 |     pub name: String,
[INFO] [stdout]   |         ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Album` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `href` is never read
[INFO] [stdout]   --> src/spotify_api.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 31 | pub struct SearchResult<T> {
[INFO] [stdout]    |            ------------ field in this struct
[INFO] [stdout] 32 |     pub href: String,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `id` is never read
[INFO] [stdout]   --> src/spotify_api.rs:40:9
[INFO] [stdout]    |
[INFO] [stdout] 37 | pub struct Track {
[INFO] [stdout]    |            ----- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 40 |     pub id: String,
[INFO] [stdout]    |         ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `token_type` is never read
[INFO] [stdout]   --> src/spotify_api.rs:49:9
[INFO] [stdout]    |
[INFO] [stdout] 45 | pub struct ExchangeCodeResponse {
[INFO] [stdout]    |            -------------------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 49 |     pub token_type: String,
[INFO] [stdout]    |         ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `scope` and `token_type` are never read
[INFO] [stdout]   --> src/spotify_api.rs:55:9
[INFO] [stdout]    |
[INFO] [stdout] 53 | pub struct RefreshTokenResponse {
[INFO] [stdout]    |            -------------------- fields in this struct
[INFO] [stdout] 54 |     pub access_token: String,
[INFO] [stdout] 55 |     pub scope: String,
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout] 56 |     pub expires_in: i64,
[INFO] [stdout] 57 |     pub token_type: String,
[INFO] [stdout]    |         ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 8.63s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: iso8601 v0.3.0, nom v4.2.3
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 2`
[INFO] running `Command { std: "docker" "inspect" "b799bb4b48f114d284ab72e4cac9649df7b538a98828cda154bff98b0006de0d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b799bb4b48f114d284ab72e4cac9649df7b538a98828cda154bff98b0006de0d", kill_on_drop: false }`
[INFO] [stdout] b799bb4b48f114d284ab72e4cac9649df7b538a98828cda154bff98b0006de0d