[INFO] cloning repository https://github.com/explodingcamera/rust-http-server-from-scratch
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/explodingcamera/rust-http-server-from-scratch" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fexplodingcamera%2Frust-http-server-from-scratch", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fexplodingcamera%2Frust-http-server-from-scratch'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c0ae779240795e0429564e06a63455aa442b25a2
[INFO] checking explodingcamera/rust-http-server-from-scratch against try#8de4b308b608cded0ebccf658a0fc719bce87d4e for pr-89056
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fexplodingcamera%2Frust-http-server-from-scratch" "/workspace/builds/worker-97/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-97/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/explodingcamera/rust-http-server-from-scratch on toolchain 8de4b308b608cded0ebccf658a0fc719bce87d4e
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/explodingcamera/rust-http-server-from-scratch
[INFO] finished tweaking git repo https://github.com/explodingcamera/rust-http-server-from-scratch
[INFO] tweaked toml for git repo https://github.com/explodingcamera/rust-http-server-from-scratch written to /workspace/builds/worker-97/source/Cargo.toml
[INFO] crate git repo https://github.com/explodingcamera/rust-http-server-from-scratch already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded httpstatus v0.1.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-97/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-97/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4d751e5c7c135c4fd81e47052c91dc7e812d78cd02038daa36f0d53114767ca0
[INFO] running `Command { std: "docker" "start" "-a" "4d751e5c7c135c4fd81e47052c91dc7e812d78cd02038daa36f0d53114767ca0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4d751e5c7c135c4fd81e47052c91dc7e812d78cd02038daa36f0d53114767ca0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4d751e5c7c135c4fd81e47052c91dc7e812d78cd02038daa36f0d53114767ca0", kill_on_drop: false }`
[INFO] [stdout] 4d751e5c7c135c4fd81e47052c91dc7e812d78cd02038daa36f0d53114767ca0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-97/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-97/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 20b3cb82d18a52b820706ebea9cf725874b077a09f668e0fbe0928bfc0e9eb92
[INFO] running `Command { std: "docker" "start" "-a" "20b3cb82d18a52b820706ebea9cf725874b077a09f668e0fbe0928bfc0e9eb92", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v1.0.29
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.76
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]    Compiling libc v0.2.102
[INFO] [stderr]    Compiling serde v1.0.130
[INFO] [stderr]    Compiling anyhow v1.0.44
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking socket2 v0.4.2
[INFO] [stderr]     Checking httpstatus v0.1.2
[INFO] [stderr]     Checking webserver-from-scratch v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `req`
[INFO] [stdout]   --> src/lib.rs:36:9
[INFO] [stdout]    |
[INFO] [stdout] 36 |     let req = std::str::from_utf8(&buffer[..])?;
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_req`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `content_length`
[INFO] [stdout]  --> src/http_response.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     content_length: u64,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `HELLO_RESPONSE`
[INFO] [stdout]   --> src/http_response.rs:9:1
[INFO] [stdout]    |
[INFO] [stdout] 9  | / const HELLO_RESPONSE: &[u8] =
[INFO] [stdout] 10 | |     b"HTTP/1.1 200 OK\nContent-Type: text/plain\nContent-Length: 12\n\nHello world!";
[INFO] [stdout]    | |_____________________________________________________________________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `req`
[INFO] [stdout]   --> src/lib.rs:36:9
[INFO] [stdout]    |
[INFO] [stdout] 36 |     let req = std::str::from_utf8(&buffer[..])?;
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_req`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `content_length`
[INFO] [stdout]  --> src/http_response.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     content_length: u64,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `HELLO_RESPONSE`
[INFO] [stdout]   --> src/http_response.rs:9:1
[INFO] [stdout]    |
[INFO] [stdout] 9  | / const HELLO_RESPONSE: &[u8] =
[INFO] [stdout] 10 | |     b"HTTP/1.1 200 OK\nContent-Type: text/plain\nContent-Length: 12\n\nHello world!";
[INFO] [stdout]    | |_____________________________________________________________________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 09s
[INFO] running `Command { std: "docker" "inspect" "20b3cb82d18a52b820706ebea9cf725874b077a09f668e0fbe0928bfc0e9eb92", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "20b3cb82d18a52b820706ebea9cf725874b077a09f668e0fbe0928bfc0e9eb92", kill_on_drop: false }`
[INFO] [stdout] 20b3cb82d18a52b820706ebea9cf725874b077a09f668e0fbe0928bfc0e9eb92