[INFO] cloning repository https://github.com/fengzhyuan/webserver_demo
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/fengzhyuan/webserver_demo" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffengzhyuan%2Fwebserver_demo", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffengzhyuan%2Fwebserver_demo'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c54f3eb4b8dca7abacefe8f1c512da3ab640051f
[INFO] checking fengzhyuan/webserver_demo against try#fc545c6b951a304df08b327c158f92678582f435 for pr-140557
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffengzhyuan%2Fwebserver_demo" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/fengzhyuan/webserver_demo on toolchain fc545c6b951a304df08b327c158f92678582f435
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+fc545c6b951a304df08b327c158f92678582f435" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/fengzhyuan/webserver_demo
[INFO] finished tweaking git repo https://github.com/fengzhyuan/webserver_demo
[INFO] tweaked toml for git repo https://github.com/fengzhyuan/webserver_demo written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/fengzhyuan/webserver_demo 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" "+fc545c6b951a304df08b327c158f92678582f435" "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-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+fc545c6b951a304df08b327c158f92678582f435" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bbfdc85c646e693d0bf02f0920c7303ed21c3ffd07d0b92fce46a7921cbcd859
[INFO] running `Command { std: "docker" "start" "-a" "bbfdc85c646e693d0bf02f0920c7303ed21c3ffd07d0b92fce46a7921cbcd859", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bbfdc85c646e693d0bf02f0920c7303ed21c3ffd07d0b92fce46a7921cbcd859", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bbfdc85c646e693d0bf02f0920c7303ed21c3ffd07d0b92fce46a7921cbcd859", kill_on_drop: false }`
[INFO] [stdout] bbfdc85c646e693d0bf02f0920c7303ed21c3ffd07d0b92fce46a7921cbcd859
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "-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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+fc545c6b951a304df08b327c158f92678582f435" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 14e7db4c5a7ff46ccc47c5b1dc163b7529ae187322007cb08e25de53c9f608f2
[INFO] running `Command { std: "docker" "start" "-a" "14e7db4c5a7ff46ccc47c5b1dc163b7529ae187322007cb08e25de53c9f608f2", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling libc v0.2.119
[INFO] [stderr]     Checking bitflags v1.3.2
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]     Checking nix v0.23.1
[INFO] [stderr]     Checking ctrlc v3.2.1
[INFO] [stderr]     Checking webserver v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/bin/main.rs:105:9
[INFO] [stdout]     |
[INFO] [stdout] 105 |         drop(&self.threadpool);
[INFO] [stdout]     |         ^^^^^----------------^
[INFO] [stdout]     |              |
[INFO] [stdout]     |              argument has type `&ThreadPool`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dropping_references)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 105 -         drop(&self.threadpool);
[INFO] [stdout] 105 +         let _ = &self.threadpool;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/bin/main.rs:105:9
[INFO] [stdout]     |
[INFO] [stdout] 105 |         drop(&self.threadpool);
[INFO] [stdout]     |         ^^^^^----------------^
[INFO] [stdout]     |              |
[INFO] [stdout]     |              argument has type `&ThreadPool`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dropping_references)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 105 -         drop(&self.threadpool);
[INFO] [stdout] 105 +         let _ = &self.threadpool;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.81s
[INFO] running `Command { std: "docker" "inspect" "14e7db4c5a7ff46ccc47c5b1dc163b7529ae187322007cb08e25de53c9f608f2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "14e7db4c5a7ff46ccc47c5b1dc163b7529ae187322007cb08e25de53c9f608f2", kill_on_drop: false }`
[INFO] [stdout] 14e7db4c5a7ff46ccc47c5b1dc163b7529ae187322007cb08e25de53c9f608f2