[INFO] fetching crate pico_pngme 0.1.0...
[INFO] checking pico_pngme-0.1.0 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate pico_pngme 0.1.0 into /workspace/builds/worker-6-tc2/source
[INFO] started tweaking crates.io crate pico_pngme 0.1.0
[INFO] finished tweaking crates.io crate pico_pngme 0.1.0
[INFO] tweaked toml for crates.io crate pico_pngme 0.1.0 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate pico_pngme 0.1.0 on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate pico_pngme 0.1.0 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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f7643403e44b7542f6b8adb62af278c4e2cf248fc2fc5f95032c92fc35eb13af
[INFO] running `Command { std: "docker" "start" "-a" "f7643403e44b7542f6b8adb62af278c4e2cf248fc2fc5f95032c92fc35eb13af", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f7643403e44b7542f6b8adb62af278c4e2cf248fc2fc5f95032c92fc35eb13af", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f7643403e44b7542f6b8adb62af278c4e2cf248fc2fc5f95032c92fc35eb13af", kill_on_drop: false }`
[INFO] [stdout] f7643403e44b7542f6b8adb62af278c4e2cf248fc2fc5f95032c92fc35eb13af
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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 -Dunmustuse_in_always_ok" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 61d7920d809a30dc4a57333295cdaf593cf074b89a967ba9e5212e82e127c5cc
[INFO] running `Command { std: "docker" "start" "-a" "61d7920d809a30dc4a57333295cdaf593cf074b89a967ba9e5212e82e127c5cc", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.36
[INFO] [stderr]    Compiling syn v1.0.86
[INFO] [stderr]    Compiling libc v0.2.119
[INFO] [stderr]    Compiling build_const v0.2.2
[INFO] [stderr]    Compiling indexmap v1.8.0
[INFO] [stderr]     Checking os_str_bytes v6.0.0
[INFO] [stderr]    Compiling crc v1.8.1
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]    Compiling quote v1.0.15
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling clap_derive v3.1.4
[INFO] [stderr]     Checking clap v3.1.5
[INFO] [stderr]     Checking pico_pngme v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/args.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 | /         #[clap(required = true)]
[INFO] [stdout] 19 | |         file_path: String,
[INFO] [stdout]    | |_________________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/args.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 | /         #[clap(required = true)]
[INFO] [stdout] 21 | |         chunk_type: String,
[INFO] [stdout]    | |__________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/args.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 22 | /         #[clap(required = true)]
[INFO] [stdout] 23 | |         message: String,
[INFO] [stdout]    | |_______________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/args.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 | /         #[clap(required = false)]
[INFO] [stdout] 25 | |         output_file: Option<String>,
[INFO] [stdout]    | |___________________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/args.rs:30:9
[INFO] [stdout]    |
[INFO] [stdout] 30 | /         #[clap(required = true)]
[INFO] [stdout] 31 | |         file_path: String,
[INFO] [stdout]    | |_________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/args.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 | /         #[clap(required = true)]
[INFO] [stdout] 33 | |         chunk_type: String,
[INFO] [stdout]    | |__________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/args.rs:38:9
[INFO] [stdout]    |
[INFO] [stdout] 38 | /         #[clap(required = true)]
[INFO] [stdout] 39 | |         file_path: String,
[INFO] [stdout]    | |_________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/args.rs:40:9
[INFO] [stdout]    |
[INFO] [stdout] 40 | /         #[clap(required = true)]
[INFO] [stdout] 41 | |         chunk_type: String,
[INFO] [stdout]    | |__________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/args.rs:45:9
[INFO] [stdout]    |
[INFO] [stdout] 45 | /         #[clap(required = true)]
[INFO] [stdout] 46 | |         file_path: String,
[INFO] [stdout]    | |_________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `pico_pngme` (lib test) due to 9 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/args.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 | /         #[clap(required = true)]
[INFO] [stdout] 19 | |         file_path: String,
[INFO] [stdout]    | |_________________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/args.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 | /         #[clap(required = true)]
[INFO] [stdout] 21 | |         chunk_type: String,
[INFO] [stdout]    | |__________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/args.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 22 | /         #[clap(required = true)]
[INFO] [stdout] 23 | |         message: String,
[INFO] [stdout]    | |_______________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/args.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 | /         #[clap(required = false)]
[INFO] [stdout] 25 | |         output_file: Option<String>,
[INFO] [stdout]    | |___________________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/args.rs:30:9
[INFO] [stdout]    |
[INFO] [stdout] 30 | /         #[clap(required = true)]
[INFO] [stdout] 31 | |         file_path: String,
[INFO] [stdout]    | |_________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/args.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 | /         #[clap(required = true)]
[INFO] [stdout] 33 | |         chunk_type: String,
[INFO] [stdout]    | |__________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/args.rs:38:9
[INFO] [stdout]    |
[INFO] [stdout] 38 | /         #[clap(required = true)]
[INFO] [stdout] 39 | |         file_path: String,
[INFO] [stdout]    | |_________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/args.rs:40:9
[INFO] [stdout]    |
[INFO] [stdout] 40 | /         #[clap(required = true)]
[INFO] [stdout] 41 | |         chunk_type: String,
[INFO] [stdout]    | |__________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/args.rs:45:9
[INFO] [stdout]    |
[INFO] [stdout] 45 | /         #[clap(required = true)]
[INFO] [stdout] 46 | |         file_path: String,
[INFO] [stdout]    | |_________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `pico_pngme` (lib) due to 9 previous errors
[INFO] running `Command { std: "docker" "inspect" "61d7920d809a30dc4a57333295cdaf593cf074b89a967ba9e5212e82e127c5cc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "61d7920d809a30dc4a57333295cdaf593cf074b89a967ba9e5212e82e127c5cc", kill_on_drop: false }`
[INFO] [stdout] 61d7920d809a30dc4a57333295cdaf593cf074b89a967ba9e5212e82e127c5cc