[INFO] cloning repository https://github.com/tianzichenone/merge-tree
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tianzichenone/merge-tree" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftianzichenone%2Fmerge-tree", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftianzichenone%2Fmerge-tree'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d12ef0fccd13f24f7bbfcb4cdbb998aae7b58ad7
[INFO] checking tianzichenone/merge-tree 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%2Ftianzichenone%2Fmerge-tree" "/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/tianzichenone/merge-tree
[INFO] finished tweaking git repo https://github.com/tianzichenone/merge-tree
[INFO] tweaked toml for git repo https://github.com/tianzichenone/merge-tree written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/tianzichenone/merge-tree 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/tianzichenone/merge-tree 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] 8d4aab688c2183865432cc3d906a785b7a0e33deb28193ccd4f498a25c48bdd7
[INFO] running `Command { std: "docker" "start" "-a" "8d4aab688c2183865432cc3d906a785b7a0e33deb28193ccd4f498a25c48bdd7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8d4aab688c2183865432cc3d906a785b7a0e33deb28193ccd4f498a25c48bdd7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8d4aab688c2183865432cc3d906a785b7a0e33deb28193ccd4f498a25c48bdd7", kill_on_drop: false }`
[INFO] [stdout] 8d4aab688c2183865432cc3d906a785b7a0e33deb28193ccd4f498a25c48bdd7
[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] 39e0052cb01e57f9df1958a23826b06598e7129126569ff0c27e61d71ecd5fc7
[INFO] running `Command { std: "docker" "start" "-a" "39e0052cb01e57f9df1958a23826b06598e7129126569ff0c27e61d71ecd5fc7", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.29
[INFO] [stderr]    Compiling libc v0.2.101
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling syn v1.0.76
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]     Checking unicode-width v0.1.8
[INFO] [stderr]    Compiling unicode-segmentation v1.8.0
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]    Compiling memoffset v0.6.4
[INFO] [stderr]     Checking trees v0.4.2
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking nix v0.22.1
[INFO] [stderr]     Checking xattr v0.2.2
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]    Compiling structopt-derive v0.4.16
[INFO] [stderr]     Checking structopt v0.3.23
[INFO] [stderr]     Checking merge-tree v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<PathBuf, Infallible>
[INFO] [stdout]  --> src/option.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | /     /// Base dir path
[INFO] [stdout] 7 | |     #[structopt(short = "b", long = "base-path", required = true)]
[INFO] [stdout] 8 | |     pub base_path: 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/option.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | /     /// Upper dir path list, can multiply
[INFO] [stdout] 11 | |     #[structopt(short = "u", long = "upper-path", required = true)]
[INFO] [stdout] 12 | |     pub upper_path_list: Vec<PathBuf>,
[INFO] [stdout]    | |_____________________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `merge-tree` (bin "merge-tree") 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<PathBuf, Infallible>
[INFO] [stdout]  --> src/option.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | /     /// Base dir path
[INFO] [stdout] 7 | |     #[structopt(short = "b", long = "base-path", required = true)]
[INFO] [stdout] 8 | |     pub base_path: 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/option.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | /     /// Upper dir path list, can multiply
[INFO] [stdout] 11 | |     #[structopt(short = "u", long = "upper-path", required = true)]
[INFO] [stdout] 12 | |     pub upper_path_list: Vec<PathBuf>,
[INFO] [stdout]    | |_____________________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `merge-tree` (bin "merge-tree" test) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "39e0052cb01e57f9df1958a23826b06598e7129126569ff0c27e61d71ecd5fc7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "39e0052cb01e57f9df1958a23826b06598e7129126569ff0c27e61d71ecd5fc7", kill_on_drop: false }`
[INFO] [stdout] 39e0052cb01e57f9df1958a23826b06598e7129126569ff0c27e61d71ecd5fc7