[INFO] cloning repository https://github.com/ptechen/csv_challenge
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ptechen/csv_challenge" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fptechen%2Fcsv_challenge", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fptechen%2Fcsv_challenge'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 97a17bcbe2e1ccf56869cf0350412c6cdba90aea
[INFO] checking ptechen/csv_challenge 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%2Fptechen%2Fcsv_challenge" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/ptechen/csv_challenge
[INFO] finished tweaking git repo https://github.com/ptechen/csv_challenge
[INFO] tweaked toml for git repo https://github.com/ptechen/csv_challenge written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/ptechen/csv_challenge 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/ptechen/csv_challenge 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-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] bf5aa9444571adfae82e0f3173abd55cde0832235be3e12c1c02b762f1c37ab3
[INFO] running `Command { std: "docker" "start" "-a" "bf5aa9444571adfae82e0f3173abd55cde0832235be3e12c1c02b762f1c37ab3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bf5aa9444571adfae82e0f3173abd55cde0832235be3e12c1c02b762f1c37ab3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bf5aa9444571adfae82e0f3173abd55cde0832235be3e12c1c02b762f1c37ab3", kill_on_drop: false }`
[INFO] [stdout] bf5aa9444571adfae82e0f3173abd55cde0832235be3e12c1c02b762f1c37ab3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 126a250ec8874e0587137c3e48c37c4694daaef21f1d3515b8fb5094477ffa7a
[INFO] running `Command { std: "docker" "start" "-a" "126a250ec8874e0587137c3e48c37c4694daaef21f1d3515b8fb5094477ffa7a", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.10
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling version_check v0.9.1
[INFO] [stderr]    Compiling syn v1.0.18
[INFO] [stderr]    Compiling libc v0.2.69
[INFO] [stderr]     Checking unicode-width v0.1.7
[INFO] [stderr]    Compiling unicode-segmentation v1.6.0
[INFO] [stderr]     Checking vec_map v0.8.1
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.2
[INFO] [stderr]    Compiling proc-macro-error v1.0.2
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]    Compiling quote v1.0.3
[INFO] [stderr]    Compiling syn-mid v0.5.0
[INFO] [stderr]    Compiling structopt-derive v0.4.7
[INFO] [stderr]     Checking structopt v0.3.14
[INFO] [stderr]     Checking csv_challenge v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]  --> src/opt.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | /     #[structopt(help = "Input file")]
[INFO] [stdout] 8 | |     pub input: 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/opt.rs:9:5
[INFO] [stdout]    |
[INFO] [stdout]  9 | /     #[structopt(help = "Column Name")]
[INFO] [stdout] 10 | |     pub column_name: String,
[INFO] [stdout]    | |___________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/opt.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | /     #[structopt(help = "Replacement Column Name")]
[INFO] [stdout] 12 | |     pub replacement: String,
[INFO] [stdout]    | |___________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/opt.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | /     #[structopt(help = "Output file, stdout if not present")]
[INFO] [stdout] 14 | |     pub output: Option<String>,
[INFO] [stdout]    | |______________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]  --> src/opt.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | /     #[structopt(help = "Input file")]
[INFO] [stdout] 8 | |     pub input: 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/opt.rs:9:5
[INFO] [stdout]    |
[INFO] [stdout]  9 | /     #[structopt(help = "Column Name")]
[INFO] [stdout] 10 | |     pub column_name: String,
[INFO] [stdout]    | |___________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/opt.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | /     #[structopt(help = "Replacement Column Name")]
[INFO] [stdout] 12 | |     pub replacement: String,
[INFO] [stdout]    | |___________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/opt.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | /     #[structopt(help = "Output file, stdout if not present")]
[INFO] [stdout] 14 | |     pub output: Option<String>,
[INFO] [stdout]    | |______________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `csv_challenge` (lib) due to 4 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `csv_challenge` (lib test) due to 4 previous errors
[INFO] running `Command { std: "docker" "inspect" "126a250ec8874e0587137c3e48c37c4694daaef21f1d3515b8fb5094477ffa7a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "126a250ec8874e0587137c3e48c37c4694daaef21f1d3515b8fb5094477ffa7a", kill_on_drop: false }`
[INFO] [stdout] 126a250ec8874e0587137c3e48c37c4694daaef21f1d3515b8fb5094477ffa7a