[INFO] fetching crate cargo-man 0.1.2...
[INFO] checking cargo-man-0.1.2 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate cargo-man 0.1.2 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate cargo-man 0.1.2
[INFO] finished tweaking crates.io crate cargo-man 0.1.2
[INFO] tweaked toml for crates.io crate cargo-man 0.1.2 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate cargo-man 0.1.2 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 cargo-man 0.1.2 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-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 3b8ac300865d98bf65572788465fb695a4f4c4a51b75a485a29e7cbda4b57444
[INFO] running `Command { std: "docker" "start" "-a" "3b8ac300865d98bf65572788465fb695a4f4c4a51b75a485a29e7cbda4b57444", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3b8ac300865d98bf65572788465fb695a4f4c4a51b75a485a29e7cbda4b57444", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3b8ac300865d98bf65572788465fb695a4f4c4a51b75a485a29e7cbda4b57444", kill_on_drop: false }`
[INFO] [stdout] 3b8ac300865d98bf65572788465fb695a4f4c4a51b75a485a29e7cbda4b57444
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 8c0b4a395211f58b7dfbecabb7fd03f2a9a1df5091731712ade50b004894be46
[INFO] running `Command { std: "docker" "start" "-a" "8c0b4a395211f58b7dfbecabb7fd03f2a9a1df5091731712ade50b004894be46", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.28
[INFO] [stderr]    Compiling libc v0.2.101
[INFO] [stderr]    Compiling syn v1.0.75
[INFO] [stderr]    Compiling serde v1.0.129
[INFO] [stderr]    Compiling serde_derive v1.0.129
[INFO] [stderr]     Checking hashbrown v0.11.2
[INFO] [stderr]     Checking unicode-width v0.1.8
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking text_io v0.1.9
[INFO] [stderr]    Compiling indexmap v1.7.0
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking itertools v0.10.1
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking toml v0.5.8
[INFO] [stderr]     Checking cargo-man v0.1.2 (/opt/rustwide/workdir)
[INFO] [stderr] error: could not compile `cargo-man` (bin "cargo-man") due to 1 previous error
[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/main.rs:18:36
[INFO] [stdout]    |
[INFO] [stdout] 18 |       let manifest_content: String = fs::read_to_string(opts.path.clone())
[INFO] [stdout]    |  ____________________________________^
[INFO] [stdout] 19 | |         .expect("you must be in a folder with a valid Cargo manifest or targeting a cargo manifest with the path")
[INFO] [stdout] 20 | |         .parse()
[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/main.rs:18:36
[INFO] [stdout]    |
[INFO] [stdout] 18 |       let manifest_content: String = fs::read_to_string(opts.path.clone())
[INFO] [stdout]    |  ____________________________________^
[INFO] [stdout] 19 | |         .expect("you must be in a folder with a valid Cargo manifest or targeting a cargo manifest with the path")
[INFO] [stdout] 20 | |         .parse()
[INFO] [stdout]    | |________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `cargo-man` (bin "cargo-man" test) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "8c0b4a395211f58b7dfbecabb7fd03f2a9a1df5091731712ade50b004894be46", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8c0b4a395211f58b7dfbecabb7fd03f2a9a1df5091731712ade50b004894be46", kill_on_drop: false }`
[INFO] [stdout] 8c0b4a395211f58b7dfbecabb7fd03f2a9a1df5091731712ade50b004894be46