[INFO] cloning repository https://github.com/noelzubin/imgdiff
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/noelzubin/imgdiff" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnoelzubin%2Fimgdiff", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnoelzubin%2Fimgdiff'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8027f92766eaf61e0f9892fbbca25a837516b111
[INFO] checking noelzubin/imgdiff 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%2Fnoelzubin%2Fimgdiff" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/noelzubin/imgdiff
[INFO] finished tweaking git repo https://github.com/noelzubin/imgdiff
[INFO] tweaked toml for git repo https://github.com/noelzubin/imgdiff written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/noelzubin/imgdiff 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/noelzubin/imgdiff 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-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] b33a7ffaee032b8cbe867aac07ef98a64222462af3da1913311651d630f77851
[INFO] running `Command { std: "docker" "start" "-a" "b33a7ffaee032b8cbe867aac07ef98a64222462af3da1913311651d630f77851", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b33a7ffaee032b8cbe867aac07ef98a64222462af3da1913311651d630f77851", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b33a7ffaee032b8cbe867aac07ef98a64222462af3da1913311651d630f77851", kill_on_drop: false }`
[INFO] [stdout] b33a7ffaee032b8cbe867aac07ef98a64222462af3da1913311651d630f77851
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] a2e2d3560564693c86659ae7872981a5fd8e2d01128667f2e92f954b73d92c68
[INFO] running `Command { std: "docker" "start" "-a" "a2e2d3560564693c86659ae7872981a5fd8e2d01128667f2e92f954b73d92c68", kill_on_drop: false }`
[INFO] [stderr]    Compiling crossbeam-utils v0.8.1
[INFO] [stderr]    Compiling memoffset v0.6.1
[INFO] [stderr]    Compiling const_fn v0.4.4
[INFO] [stderr]    Compiling rayon-core v1.9.0
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling rayon v1.5.0
[INFO] [stderr]    Compiling syn v1.0.54
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling miniz_oxide v0.4.3
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]     Checking weezl v0.1.3
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking png v0.16.8
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking gif v0.11.1
[INFO] [stderr]     Checking num-rational v0.3.2
[INFO] [stderr]     Checking crossbeam-channel v0.5.0
[INFO] [stderr]     Checking crossbeam-epoch v0.9.1
[INFO] [stderr]     Checking bytemuck v1.4.1
[INFO] [stderr]     Checking lab v0.8.2
[INFO] [stderr]     Checking crossbeam-deque v0.8.0
[INFO] [stderr]     Checking jpeg-decoder v0.1.20
[INFO] [stderr]    Compiling structopt-derive v0.4.14
[INFO] [stderr]     Checking tiff v0.6.1
[INFO] [stderr]     Checking structopt v0.3.21
[INFO] [stderr]     Checking image v0.23.12
[INFO] [stderr]     Checking imgdiff v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<PathBuf, Infallible>
[INFO] [stdout]  --> src/main.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | /     #[structopt(name="image1")]
[INFO] [stdout] 9 | |     inp1: PathBuf,
[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<PathBuf, Infallible>
[INFO] [stdout]   --> src/main.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | /     #[structopt(name="image2")]
[INFO] [stdout] 12 | |     inp2: PathBuf,
[INFO] [stdout]    | |_________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<PathBuf, Infallible>
[INFO] [stdout]   --> src/main.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | /     #[structopt(name="output")]
[INFO] [stdout] 15 | |     out: PathBuf,
[INFO] [stdout]    | |________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `imgdiff` (bin "imgdiff" test) due to 3 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<PathBuf, Infallible>
[INFO] [stdout]  --> src/main.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | /     #[structopt(name="image1")]
[INFO] [stdout] 9 | |     inp1: PathBuf,
[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<PathBuf, Infallible>
[INFO] [stdout]   --> src/main.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | /     #[structopt(name="image2")]
[INFO] [stdout] 12 | |     inp2: PathBuf,
[INFO] [stdout]    | |_________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<PathBuf, Infallible>
[INFO] [stdout]   --> src/main.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | /     #[structopt(name="output")]
[INFO] [stdout] 15 | |     out: PathBuf,
[INFO] [stdout]    | |________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `imgdiff` (bin "imgdiff") due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "a2e2d3560564693c86659ae7872981a5fd8e2d01128667f2e92f954b73d92c68", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a2e2d3560564693c86659ae7872981a5fd8e2d01128667f2e92f954b73d92c68", kill_on_drop: false }`
[INFO] [stdout] a2e2d3560564693c86659ae7872981a5fd8e2d01128667f2e92f954b73d92c68