[INFO] cloning repository https://github.com/fcsonline/trawler
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/fcsonline/trawler" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffcsonline%2Ftrawler", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffcsonline%2Ftrawler'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4360162f2d7a64e0b931dc238e6d00ec359e1ae3
[INFO] checking fcsonline/trawler against try#89681135fd92d7dee32c3e562b052ee82f97008c for pr-97086
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffcsonline%2Ftrawler" "/workspace/builds/worker-64/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-64/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/fcsonline/trawler on toolchain 89681135fd92d7dee32c3e562b052ee82f97008c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+89681135fd92d7dee32c3e562b052ee82f97008c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/fcsonline/trawler
[INFO] finished tweaking git repo https://github.com/fcsonline/trawler
[INFO] tweaked toml for git repo https://github.com/fcsonline/trawler written to /workspace/builds/worker-64/source/Cargo.toml
[INFO] crate git repo https://github.com/fcsonline/trawler already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+89681135fd92d7dee32c3e562b052ee82f97008c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-64/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-64/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+89681135fd92d7dee32c3e562b052ee82f97008c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fadadb1e6ceaf34df6c254ad458cf02fabddb3b6f90ae6ae9a767f704ecb353d
[INFO] running `Command { std: "docker" "start" "-a" "fadadb1e6ceaf34df6c254ad458cf02fabddb3b6f90ae6ae9a767f704ecb353d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fadadb1e6ceaf34df6c254ad458cf02fabddb3b6f90ae6ae9a767f704ecb353d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fadadb1e6ceaf34df6c254ad458cf02fabddb3b6f90ae6ae9a767f704ecb353d", kill_on_drop: false }`
[INFO] [stdout] fadadb1e6ceaf34df6c254ad458cf02fabddb3b6f90ae6ae9a767f704ecb353d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-64/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-64/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" "-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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+89681135fd92d7dee32c3e562b052ee82f97008c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 78c10cf7c762da275c950405f36cf8f1822e0c7eba1ec34ef095b532bc436665
[INFO] running `Command { std: "docker" "start" "-a" "78c10cf7c762da275c950405f36cf8f1822e0c7eba1ec34ef095b532bc436665", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.45
[INFO] [stderr]     Checking rand_core v0.3.0
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking byteorder v1.2.7
[INFO] [stderr]     Checking futures v0.1.25
[INFO] [stderr]     Checking slab v0.4.1
[INFO] [stderr]     Checking log v0.4.6
[INFO] [stderr]     Checking owning_ref v0.4.0
[INFO] [stderr]     Checking crossbeam-utils v0.6.3
[INFO] [stderr]     Checking walkdir v2.2.7
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]     Checking rand_core v0.2.2
[INFO] [stderr]     Checking unreachable v1.0.0
[INFO] [stderr]     Checking lock_api v0.1.5
[INFO] [stderr]    Compiling parking_lot_core v0.3.1
[INFO] [stderr]     Checking tokio-executor v0.1.5
[INFO] [stderr]     Checking smallvec v0.6.7
[INFO] [stderr]     Checking iovec v0.1.2
[INFO] [stderr]     Checking net2 v0.2.33
[INFO] [stderr]     Checking rand v0.5.5
[INFO] [stderr]     Checking num_cpus v1.9.0
[INFO] [stderr]     Checking inotify-sys v0.1.3
[INFO] [stderr]     Checking filetime v0.2.4
[INFO] [stderr]     Checking bytes v0.4.11
[INFO] [stderr]     Checking mio v0.6.16
[INFO] [stderr]     Checking tokio-io v0.1.10
[INFO] [stderr]     Checking mio-extras v2.0.5
[INFO] [stderr]     Checking parking_lot v0.6.4
[INFO] [stderr]     Checking tokio-reactor v0.1.7
[INFO] [stderr]     Checking inotify v0.6.1
[INFO] [stderr]     Checking notify v4.0.6
[INFO] [stderr]     Checking trawler v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]  --> src/lib/step.rs:4:59
[INFO] [stdout]   |
[INFO] [stdout] 4 |     fn execute(&self, buffer: &Buffer) -> std::io::Result<(Buffer)>;
[INFO] [stdout]   |                                                           ^      ^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]   |
[INFO] [stdout] 4 -     fn execute(&self, buffer: &Buffer) -> std::io::Result<(Buffer)>;
[INFO] [stdout] 4 +     fn execute(&self, buffer: &Buffer) -> std::io::Result<Buffer>;
[INFO] [stdout]   | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/steps/write.rs:18:59
[INFO] [stdout]    |
[INFO] [stdout] 18 |     fn execute(&self, buffer: &Buffer) -> std::io::Result<(Buffer)> {
[INFO] [stdout]    |                                                           ^      ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 18 -     fn execute(&self, buffer: &Buffer) -> std::io::Result<(Buffer)> {
[INFO] [stdout] 18 +     fn execute(&self, buffer: &Buffer) -> std::io::Result<Buffer> {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/steps/hash.rs:16:59
[INFO] [stdout]    |
[INFO] [stdout] 16 |     fn execute(&self, buffer: &Buffer) -> std::io::Result<(Buffer)> {
[INFO] [stdout]    |                                                           ^      ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 16 -     fn execute(&self, buffer: &Buffer) -> std::io::Result<(Buffer)> {
[INFO] [stdout] 16 +     fn execute(&self, buffer: &Buffer) -> std::io::Result<Buffer> {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/steps/echo.rs:16:59
[INFO] [stdout]    |
[INFO] [stdout] 16 |     fn execute(&self, buffer: &Buffer) -> std::io::Result<(Buffer)> {
[INFO] [stdout]    |                                                           ^      ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 16 -     fn execute(&self, buffer: &Buffer) -> std::io::Result<(Buffer)> {
[INFO] [stdout] 16 +     fn execute(&self, buffer: &Buffer) -> std::io::Result<Buffer> {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/steps/reverse.rs:16:59
[INFO] [stdout]    |
[INFO] [stdout] 16 |     fn execute(&self, buffer: &Buffer) -> std::io::Result<(Buffer)> {
[INFO] [stdout]    |                                                           ^      ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 16 -     fn execute(&self, buffer: &Buffer) -> std::io::Result<(Buffer)> {
[INFO] [stdout] 16 +     fn execute(&self, buffer: &Buffer) -> std::io::Result<Buffer> {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/lib/catalog.rs:8:36
[INFO] [stdout]   |
[INFO] [stdout] 8 |     pub steps: HashMap<String, Box<Step>>
[INFO] [stdout]   |                                    ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]   = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]   |
[INFO] [stdout] 8 -     pub steps: HashMap<String, Box<Step>>
[INFO] [stdout] 8 +     pub steps: HashMap<String, Box<dyn Step>>
[INFO] [stdout]   | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib/catalog.rs:13:44
[INFO] [stdout]    |
[INFO] [stdout] 13 |         let mut steps: HashMap<String, Box<Step>> = HashMap::new();
[INFO] [stdout]    |                                            ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 13 -         let mut steps: HashMap<String, Box<Step>> = HashMap::new();
[INFO] [stdout] 13 +         let mut steps: HashMap<String, Box<dyn Step>> = HashMap::new();
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]  --> src/lib/step.rs:4:59
[INFO] [stdout]   |
[INFO] [stdout] 4 |     fn execute(&self, buffer: &Buffer) -> std::io::Result<(Buffer)>;
[INFO] [stdout]   |                                                           ^      ^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]   |
[INFO] [stdout] 4 -     fn execute(&self, buffer: &Buffer) -> std::io::Result<(Buffer)>;
[INFO] [stdout] 4 +     fn execute(&self, buffer: &Buffer) -> std::io::Result<Buffer>;
[INFO] [stdout]   | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/steps/write.rs:18:59
[INFO] [stdout]    |
[INFO] [stdout] 18 |     fn execute(&self, buffer: &Buffer) -> std::io::Result<(Buffer)> {
[INFO] [stdout]    |                                                           ^      ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 18 -     fn execute(&self, buffer: &Buffer) -> std::io::Result<(Buffer)> {
[INFO] [stdout] 18 +     fn execute(&self, buffer: &Buffer) -> std::io::Result<Buffer> {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/steps/hash.rs:16:59
[INFO] [stdout]    |
[INFO] [stdout] 16 |     fn execute(&self, buffer: &Buffer) -> std::io::Result<(Buffer)> {
[INFO] [stdout]    |                                                           ^      ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 16 -     fn execute(&self, buffer: &Buffer) -> std::io::Result<(Buffer)> {
[INFO] [stdout] 16 +     fn execute(&self, buffer: &Buffer) -> std::io::Result<Buffer> {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/steps/echo.rs:16:59
[INFO] [stdout]    |
[INFO] [stdout] 16 |     fn execute(&self, buffer: &Buffer) -> std::io::Result<(Buffer)> {
[INFO] [stdout]    |                                                           ^      ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 16 -     fn execute(&self, buffer: &Buffer) -> std::io::Result<(Buffer)> {
[INFO] [stdout] 16 +     fn execute(&self, buffer: &Buffer) -> std::io::Result<Buffer> {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/steps/reverse.rs:16:59
[INFO] [stdout]    |
[INFO] [stdout] 16 |     fn execute(&self, buffer: &Buffer) -> std::io::Result<(Buffer)> {
[INFO] [stdout]    |                                                           ^      ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 16 -     fn execute(&self, buffer: &Buffer) -> std::io::Result<(Buffer)> {
[INFO] [stdout] 16 +     fn execute(&self, buffer: &Buffer) -> std::io::Result<Buffer> {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/lib/catalog.rs:8:36
[INFO] [stdout]   |
[INFO] [stdout] 8 |     pub steps: HashMap<String, Box<Step>>
[INFO] [stdout]   |                                    ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]   = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]   |
[INFO] [stdout] 8 -     pub steps: HashMap<String, Box<Step>>
[INFO] [stdout] 8 +     pub steps: HashMap<String, Box<dyn Step>>
[INFO] [stdout]   | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib/catalog.rs:13:44
[INFO] [stdout]    |
[INFO] [stdout] 13 |         let mut steps: HashMap<String, Box<Step>> = HashMap::new();
[INFO] [stdout]    |                                            ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 13 -         let mut steps: HashMap<String, Box<Step>> = HashMap::new();
[INFO] [stdout] 13 +         let mut steps: HashMap<String, Box<dyn Step>> = HashMap::new();
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 34.50s
[INFO] running `Command { std: "docker" "inspect" "78c10cf7c762da275c950405f36cf8f1822e0c7eba1ec34ef095b532bc436665", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "78c10cf7c762da275c950405f36cf8f1822e0c7eba1ec34ef095b532bc436665", kill_on_drop: false }`
[INFO] [stdout] 78c10cf7c762da275c950405f36cf8f1822e0c7eba1ec34ef095b532bc436665