[INFO] updating cached repository https://github.com/fcsonline/trawler
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 4360162f2d7a64e0b931dc238e6d00ec359e1ae3
[INFO] checking fcsonline/trawler against master#30ca215b4e38b32aa7abdd635c5e2d56f5724494 for pr-66037
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffcsonline%2Ftrawler" "/workspace/builds/worker-6/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/fcsonline/trawler on toolchain 30ca215b4e38b32aa7abdd635c5e2d56f5724494
[INFO] running `"/workspace/cargo-home/bin/cargo" "+30ca215b4e38b32aa7abdd635c5e2d56f5724494" "read-manifest" "--manifest-path" "Cargo.toml"`
[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-6/source/Cargo.toml
[INFO] crate git repo https://github.com/fcsonline/trawler already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+30ca215b4e38b32aa7abdd635c5e2d56f5724494" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+30ca215b4e38b32aa7abdd635c5e2d56f5724494" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 9c1eea5d78d6373d1ca77e69d1795bb9b87c519ef913dd5507a363cddbffcadd
[INFO] running `"docker" "start" "-a" "9c1eea5d78d6373d1ca77e69d1795bb9b87c519ef913dd5507a363cddbffcadd"`
[INFO] [stderr]    Compiling libc v0.2.45
[INFO] [stderr]     Checking crossbeam-utils v0.6.3
[INFO] [stderr]     Checking smallvec v0.6.7
[INFO] [stderr]     Checking iovec v0.1.2
[INFO] [stderr]     Checking rand v0.5.5
[INFO] [stderr]     Checking net2 v0.2.33
[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_core v0.3.1
[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] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]  --> src/lib/catalog.rs:8:36
[INFO] [stderr]   |
[INFO] [stderr] 8 |     pub steps: HashMap<String, Box<Step>>
[INFO] [stderr]   |                                    ^^^^ help: use `dyn`: `dyn Step`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib/catalog.rs:13:44
[INFO] [stderr]    |
[INFO] [stderr] 13 |         let mut steps: HashMap<String, Box<Step>> = HashMap::new();
[INFO] [stderr]    |                                            ^^^^ help: use `dyn`: `dyn Step`
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]  --> src/lib/step.rs:4:59
[INFO] [stderr]   |
[INFO] [stderr] 4 |     fn execute(&self, buffer: &Buffer) -> std::io::Result<(Buffer)>;
[INFO] [stderr]   |                                                           ^^^^^^^^ help: remove these parentheses
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/steps/write.rs:18:59
[INFO] [stderr]    |
[INFO] [stderr] 18 |     fn execute(&self, buffer: &Buffer) -> std::io::Result<(Buffer)> {
[INFO] [stderr]    |                                                           ^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/steps/hash.rs:16:59
[INFO] [stderr]    |
[INFO] [stderr] 16 |     fn execute(&self, buffer: &Buffer) -> std::io::Result<(Buffer)> {
[INFO] [stderr]    |                                                           ^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/steps/echo.rs:16:59
[INFO] [stderr]    |
[INFO] [stderr] 16 |     fn execute(&self, buffer: &Buffer) -> std::io::Result<(Buffer)> {
[INFO] [stderr]    |                                                           ^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/steps/reverse.rs:16:59
[INFO] [stderr]    |
[INFO] [stderr] 16 |     fn execute(&self, buffer: &Buffer) -> std::io::Result<(Buffer)> {
[INFO] [stderr]    |                                                           ^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]  --> src/lib/catalog.rs:8:36
[INFO] [stderr]   |
[INFO] [stderr] 8 |     pub steps: HashMap<String, Box<Step>>
[INFO] [stderr]   |                                    ^^^^ help: use `dyn`: `dyn Step`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib/catalog.rs:13:44
[INFO] [stderr]    |
[INFO] [stderr] 13 |         let mut steps: HashMap<String, Box<Step>> = HashMap::new();
[INFO] [stderr]    |                                            ^^^^ help: use `dyn`: `dyn Step`
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]  --> src/lib/step.rs:4:59
[INFO] [stderr]   |
[INFO] [stderr] 4 |     fn execute(&self, buffer: &Buffer) -> std::io::Result<(Buffer)>;
[INFO] [stderr]   |                                                           ^^^^^^^^ help: remove these parentheses
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/steps/write.rs:18:59
[INFO] [stderr]    |
[INFO] [stderr] 18 |     fn execute(&self, buffer: &Buffer) -> std::io::Result<(Buffer)> {
[INFO] [stderr]    |                                                           ^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/steps/hash.rs:16:59
[INFO] [stderr]    |
[INFO] [stderr] 16 |     fn execute(&self, buffer: &Buffer) -> std::io::Result<(Buffer)> {
[INFO] [stderr]    |                                                           ^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/steps/echo.rs:16:59
[INFO] [stderr]    |
[INFO] [stderr] 16 |     fn execute(&self, buffer: &Buffer) -> std::io::Result<(Buffer)> {
[INFO] [stderr]    |                                                           ^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/steps/reverse.rs:16:59
[INFO] [stderr]    |
[INFO] [stderr] 16 |     fn execute(&self, buffer: &Buffer) -> std::io::Result<(Buffer)> {
[INFO] [stderr]    |                                                           ^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 11.43s
[INFO] running `"docker" "inspect" "9c1eea5d78d6373d1ca77e69d1795bb9b87c519ef913dd5507a363cddbffcadd"`
[INFO] running `"docker" "rm" "-f" "9c1eea5d78d6373d1ca77e69d1795bb9b87c519ef913dd5507a363cddbffcadd"`
[INFO] [stdout] 9c1eea5d78d6373d1ca77e69d1795bb9b87c519ef913dd5507a363cddbffcadd