[INFO] cloning repository https://github.com/nicolaracco/rust_katas
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/nicolaracco/rust_katas" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnicolaracco%2Frust_katas", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnicolaracco%2Frust_katas'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] cacf4e47888470fd331de830eda44c5f67a297ac
[INFO] checking nicolaracco/rust_katas against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnicolaracco%2Frust_katas" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/nicolaracco/rust_katas
[INFO] finished tweaking git repo https://github.com/nicolaracco/rust_katas
[INFO] tweaked toml for git repo https://github.com/nicolaracco/rust_katas written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/nicolaracco/rust_katas 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 git repo https://github.com/nicolaracco/rust_katas 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-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] ebf8c543629ad3fa2005048e7d79bb2f548c42bb69ea5e5b8d69e9bf642a6ac0
[INFO] running `Command { std: "docker" "start" "-a" "ebf8c543629ad3fa2005048e7d79bb2f548c42bb69ea5e5b8d69e9bf642a6ac0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ebf8c543629ad3fa2005048e7d79bb2f548c42bb69ea5e5b8d69e9bf642a6ac0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ebf8c543629ad3fa2005048e7d79bb2f548c42bb69ea5e5b8d69e9bf642a6ac0", kill_on_drop: false }`
[INFO] [stdout] ebf8c543629ad3fa2005048e7d79bb2f548c42bb69ea5e5b8d69e9bf642a6ac0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 3d10183719567a3144f931aae18f834de570482828ca5aae5d21f2bf3ee47efa
[INFO] running `Command { std: "docker" "start" "-a" "3d10183719567a3144f931aae18f834de570482828ca5aae5d21f2bf3ee47efa", kill_on_drop: false }`
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]    Compiling proc-macro2 v1.0.40
[INFO] [stderr]    Compiling unicode-ident v1.0.1
[INFO] [stderr]    Compiling quote v1.0.20
[INFO] [stderr]    Compiling syn v1.0.98
[INFO] [stderr]    Compiling libc v0.2.126
[INFO] [stderr]    Compiling unicode-segmentation v1.9.0
[INFO] [stderr]     Checking unicode-width v0.1.9
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking ansi_term v0.12.1
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]    Compiling structopt-derive v0.4.18
[INFO] [stderr]     Checking structopt v0.3.26
[INFO] [stderr]     Checking rust_katas v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/longest.rs:32:5
[INFO] [stdout]    |
[INFO] [stdout] 32 | /     #[structopt(required = true, help = "a string containing only letters from a to z")]
[INFO] [stdout] 33 | |     s1: 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<String, Infallible>
[INFO] [stdout]   --> src/longest.rs:32:5
[INFO] [stdout]    |
[INFO] [stdout] 32 | /     #[structopt(required = true, help = "a string containing only letters from a to z")]
[INFO] [stdout] 33 | |     s1: 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<String, Infallible>
[INFO] [stdout]   --> src/longest.rs:34:5
[INFO] [stdout]    |
[INFO] [stdout] 34 | /     #[structopt(required = true, help = "a string containing only letters from a to z")]
[INFO] [stdout] 35 | |     s2: String,
[INFO] [stdout]    | |______________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/morse_decode.rs:81:5
[INFO] [stdout]    |
[INFO] [stdout] 81 | /     #[structopt(
[INFO] [stdout] 82 | |         required = true,
[INFO] [stdout] 83 | |         help = "Morse message to decode. E.g. '.... . -.--   .---', or '11001100' if -b is given"
[INFO] [stdout] 84 | |     )]
[INFO] [stdout] 85 | |     morse_message: String,
[INFO] [stdout]    | |_________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/unique_in_order.rs:28:5
[INFO] [stdout]    |
[INFO] [stdout] 28 | /     #[structopt(required = true, help = "list of items. E.g. 'AABBCD'")]
[INFO] [stdout] 29 | |     list: String,
[INFO] [stdout]    | |________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/longest.rs:34:5
[INFO] [stdout]    |
[INFO] [stdout] 34 | /     #[structopt(required = true, help = "a string containing only letters from a to z")]
[INFO] [stdout] 35 | |     s2: String,
[INFO] [stdout]    | |______________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/morse_decode.rs:81:5
[INFO] [stdout]    |
[INFO] [stdout] 81 | /     #[structopt(
[INFO] [stdout] 82 | |         required = true,
[INFO] [stdout] 83 | |         help = "Morse message to decode. E.g. '.... . -.--   .---', or '11001100' if -b is given"
[INFO] [stdout] 84 | |     )]
[INFO] [stdout] 85 | |     morse_message: String,
[INFO] [stdout]    | |_________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/unique_in_order.rs:28:5
[INFO] [stdout]    |
[INFO] [stdout] 28 | /     #[structopt(required = true, help = "list of items. E.g. 'AABBCD'")]
[INFO] [stdout] 29 | |     list: String,
[INFO] [stdout]    | |________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust_katas` (bin "rust_katas") due to 4 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `rust_katas` (bin "rust_katas" test) due to 4 previous errors
[INFO] running `Command { std: "docker" "inspect" "3d10183719567a3144f931aae18f834de570482828ca5aae5d21f2bf3ee47efa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3d10183719567a3144f931aae18f834de570482828ca5aae5d21f2bf3ee47efa", kill_on_drop: false }`
[INFO] [stdout] 3d10183719567a3144f931aae18f834de570482828ca5aae5d21f2bf3ee47efa