[INFO] updating cached repository https://github.com/ifsheldon/simple_web_server
[INFO] running `Command { std: "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", kill_on_drop: false }`
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f031667a3b682f45ac0ad8fd3fdb4dba592ff5b9
[INFO] checking ifsheldon/simple_web_server against master#e22b61bff0bdd08be7665607cb7be3748c8a35d2 for pr-74627
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fifsheldon%2Fsimple_web_server" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ifsheldon/simple_web_server on toolchain e22b61bff0bdd08be7665607cb7be3748c8a35d2
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+e22b61bff0bdd08be7665607cb7be3748c8a35d2" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ifsheldon/simple_web_server
[INFO] finished tweaking git repo https://github.com/ifsheldon/simple_web_server
[INFO] tweaked toml for git repo https://github.com/ifsheldon/simple_web_server written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/ifsheldon/simple_web_server already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+e22b61bff0bdd08be7665607cb7be3748c8a35d2" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+e22b61bff0bdd08be7665607cb7be3748c8a35d2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1e4ea866fa3312082203f9d60189465b8ba779dea3765851338545abaa657175
[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" "1e4ea866fa3312082203f9d60189465b8ba779dea3765851338545abaa657175", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1e4ea866fa3312082203f9d60189465b8ba779dea3765851338545abaa657175", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1e4ea866fa3312082203f9d60189465b8ba779dea3765851338545abaa657175", kill_on_drop: false }`
[INFO] [stdout] 1e4ea866fa3312082203f9d60189465b8ba779dea3765851338545abaa657175
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+e22b61bff0bdd08be7665607cb7be3748c8a35d2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e81f55c3ba8009136cb7b5773040449d174414593ca42d8d7c99edd1c8fde9b3
[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" "e81f55c3ba8009136cb7b5773040449d174414593ca42d8d7c99edd1c8fde9b3", kill_on_drop: false }`
[INFO] [stderr]     Checking simple_web_server v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::borrow::BorrowMut`
[INFO] [stdout]   --> src/file_cache.rs:68:9
[INFO] [stdout]    |
[INFO] [stdout] 68 |     use std::borrow::BorrowMut;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `cache`
[INFO] [stdout]   --> src/file_cache.rs:73:13
[INFO] [stdout]    |
[INFO] [stdout] 73 |         let cache = FileCache::new(String::from("403.html"), 1000).unwrap();
[INFO] [stdout]    |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_cache`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.27s
[INFO] running `Command { std: "docker" "inspect" "e81f55c3ba8009136cb7b5773040449d174414593ca42d8d7c99edd1c8fde9b3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e81f55c3ba8009136cb7b5773040449d174414593ca42d8d7c99edd1c8fde9b3", kill_on_drop: false }`
[INFO] [stdout] e81f55c3ba8009136cb7b5773040449d174414593ca42d8d7c99edd1c8fde9b3