[INFO] fetching crate proudcat 0.2.0...
[INFO] checking proudcat-0.2.0 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate proudcat 0.2.0 into /workspace/builds/worker-5-tc2/source
[INFO] started tweaking crates.io crate proudcat 0.2.0
[INFO] finished tweaking crates.io crate proudcat 0.2.0
[INFO] tweaked toml for crates.io crate proudcat 0.2.0 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate proudcat 0.2.0 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 proudcat 0.2.0 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-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 681f175fac7894a9ad20aeba17daa295d525a538e646e941ec9343e233368cd6
[INFO] running `Command { std: "docker" "start" "-a" "681f175fac7894a9ad20aeba17daa295d525a538e646e941ec9343e233368cd6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "681f175fac7894a9ad20aeba17daa295d525a538e646e941ec9343e233368cd6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "681f175fac7894a9ad20aeba17daa295d525a538e646e941ec9343e233368cd6", kill_on_drop: false }`
[INFO] [stdout] 681f175fac7894a9ad20aeba17daa295d525a538e646e941ec9343e233368cd6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 71c14c893578bc53bb09b8ec776693dd9d10582642ac81c9548c831ed64e99fe
[INFO] running `Command { std: "docker" "start" "-a" "71c14c893578bc53bb09b8ec776693dd9d10582642ac81c9548c831ed64e99fe", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.18
[INFO] [stderr]    Compiling syn v1.0.33
[INFO] [stderr]    Compiling libc v0.2.71
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.3
[INFO] [stderr]    Compiling proc-macro-error v1.0.3
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking term_size v0.3.2
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]     Checking clap v2.33.1
[INFO] [stderr]    Compiling syn-mid v0.5.0
[INFO] [stderr]    Compiling structopt-derive v0.4.8
[INFO] [stderr]     Checking structopt v0.3.15
[INFO] [stderr]     Checking proudcat v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> src/main.rs:143:3
[INFO] [stdout]     |
[INFO] [stdout] 143 | /   #[structopt(name = "flag", short = "f", long = "flag",
[INFO] [stdout] 144 | |     number_of_values = 1, display_order = 1,
[INFO] [stdout] 145 | |     help = "Choose which flags to use; default: pride")]
[INFO] [stdout] 146 | |   flags: Vec<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/main.rs:162:3
[INFO] [stdout]     |
[INFO] [stdout] 162 | /   #[structopt(name = "FILES", default_value = "-")]
[INFO] [stdout] 163 | |   files: Vec<String>
[INFO] [stdout]     | |____________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `proudcat` (bin "proudcat") due to 2 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<String, Infallible>
[INFO] [stdout]    --> src/main.rs:143:3
[INFO] [stdout]     |
[INFO] [stdout] 143 | /   #[structopt(name = "flag", short = "f", long = "flag",
[INFO] [stdout] 144 | |     number_of_values = 1, display_order = 1,
[INFO] [stdout] 145 | |     help = "Choose which flags to use; default: pride")]
[INFO] [stdout] 146 | |   flags: Vec<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/main.rs:162:3
[INFO] [stdout]     |
[INFO] [stdout] 162 | /   #[structopt(name = "FILES", default_value = "-")]
[INFO] [stdout] 163 | |   files: Vec<String>
[INFO] [stdout]     | |____________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `proudcat` (bin "proudcat" test) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "71c14c893578bc53bb09b8ec776693dd9d10582642ac81c9548c831ed64e99fe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "71c14c893578bc53bb09b8ec776693dd9d10582642ac81c9548c831ed64e99fe", kill_on_drop: false }`
[INFO] [stdout] 71c14c893578bc53bb09b8ec776693dd9d10582642ac81c9548c831ed64e99fe