[INFO] cloning repository https://github.com/crazymerlyn/engine
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/crazymerlyn/engine" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcrazymerlyn%2Fengine", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcrazymerlyn%2Fengine'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b6e5ccda8b5a7022a84c9a444b47a990967dfb2e
[INFO] checking crazymerlyn/engine against try#f47dd4da3ae8c32c9e65d307bfe640b143e674df for pr-77526
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcrazymerlyn%2Fengine" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/crazymerlyn/engine on toolchain f47dd4da3ae8c32c9e65d307bfe640b143e674df
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/crazymerlyn/engine
[INFO] finished tweaking git repo https://github.com/crazymerlyn/engine
[INFO] tweaked toml for git repo https://github.com/crazymerlyn/engine written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/crazymerlyn/engine already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "fetch" "--locked" "--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-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" "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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e99a26b9ab4f430144106bf93a820eb553690b1da1d0aebb1e7dc9eaf85b5f1e
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "e99a26b9ab4f430144106bf93a820eb553690b1da1d0aebb1e7dc9eaf85b5f1e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e99a26b9ab4f430144106bf93a820eb553690b1da1d0aebb1e7dc9eaf85b5f1e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e99a26b9ab4f430144106bf93a820eb553690b1da1d0aebb1e7dc9eaf85b5f1e", kill_on_drop: false }`
[INFO] [stdout] e99a26b9ab4f430144106bf93a820eb553690b1da1d0aebb1e7dc9eaf85b5f1e
[INFO] running `Command { std: "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" "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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8de1054f268f17cef0ba9246c60ea15a79c1faf868d5cd2e41a97fb8a7ccfc0b
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "8de1054f268f17cef0ba9246c60ea15a79c1faf868d5cd2e41a97fb8a7ccfc0b", kill_on_drop: false }`
[INFO] [stderr]     Checking engine v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/boxes.rs:106:13
[INFO] [stdout]     |
[INFO] [stdout] 106 |         let mut border_left = style.lookup("border-left-width", "border-width", &zero);
[INFO] [stdout]     |             ----^^^^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/boxes.rs:107:13
[INFO] [stdout]     |
[INFO] [stdout] 107 |         let mut border_right = style.lookup("border-right-width", "border-width", &zero);
[INFO] [stdout]     |             ----^^^^^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/boxes.rs:109:13
[INFO] [stdout]     |
[INFO] [stdout] 109 |         let mut padding_left = style.lookup("padding-left", "padding", &zero);
[INFO] [stdout]     |             ----^^^^^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/boxes.rs:110:13
[INFO] [stdout]     |
[INFO] [stdout] 110 |         let mut padding_right = style.lookup("padding-right", "padding", &zero);
[INFO] [stdout]     |             ----^^^^^^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/boxes.rs:106:13
[INFO] [stdout]     |
[INFO] [stdout] 106 |         let mut border_left = style.lookup("border-left-width", "border-width", &zero);
[INFO] [stdout]     |             ----^^^^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/boxes.rs:107:13
[INFO] [stdout]     |
[INFO] [stdout] 107 |         let mut border_right = style.lookup("border-right-width", "border-width", &zero);
[INFO] [stdout]     |             ----^^^^^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/boxes.rs:109:13
[INFO] [stdout]     |
[INFO] [stdout] 109 |         let mut padding_left = style.lookup("padding-left", "padding", &zero);
[INFO] [stdout]     |             ----^^^^^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/boxes.rs:110:13
[INFO] [stdout]     |
[INFO] [stdout] 110 |         let mut padding_right = style.lookup("padding-right", "padding", &zero);
[INFO] [stdout]     |             ----^^^^^^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.67s
[INFO] running `Command { std: "docker" "inspect" "8de1054f268f17cef0ba9246c60ea15a79c1faf868d5cd2e41a97fb8a7ccfc0b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8de1054f268f17cef0ba9246c60ea15a79c1faf868d5cd2e41a97fb8a7ccfc0b", kill_on_drop: false }`
[INFO] [stdout] 8de1054f268f17cef0ba9246c60ea15a79c1faf868d5cd2e41a97fb8a7ccfc0b