[INFO] cloning repository https://github.com/mitoma/rust_simple_http_server
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mitoma/rust_simple_http_server" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmitoma%2Frust_simple_http_server", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmitoma%2Frust_simple_http_server'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 89ce8e5a92b38e2aee4c759e7b6eb55c48c49f11
[INFO] checking mitoma/rust_simple_http_server against master#59d99f56d8888b0e5a5866d6418df3ca1bb90013 for pr-100046
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmitoma%2Frust_simple_http_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/mitoma/rust_simple_http_server on toolchain 59d99f56d8888b0e5a5866d6418df3ca1bb90013
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+59d99f56d8888b0e5a5866d6418df3ca1bb90013" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/mitoma/rust_simple_http_server
[INFO] finished tweaking git repo https://github.com/mitoma/rust_simple_http_server
[INFO] tweaked toml for git repo https://github.com/mitoma/rust_simple_http_server written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/mitoma/rust_simple_http_server already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+59d99f56d8888b0e5a5866d6418df3ca1bb90013" "fetch" "--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" "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@sha256:824c28ce115f6b999260af6986f3384c158e782489540e41c0b698ca1d9fd927" "/opt/rustwide/cargo-home/bin/cargo" "+59d99f56d8888b0e5a5866d6418df3ca1bb90013" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c76a2c7cb5e03edf31ba7dea87d0a79e78bb8d82e65a50c24dc1b8eebfe771b5
[INFO] running `Command { std: "docker" "start" "-a" "c76a2c7cb5e03edf31ba7dea87d0a79e78bb8d82e65a50c24dc1b8eebfe771b5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c76a2c7cb5e03edf31ba7dea87d0a79e78bb8d82e65a50c24dc1b8eebfe771b5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c76a2c7cb5e03edf31ba7dea87d0a79e78bb8d82e65a50c24dc1b8eebfe771b5", kill_on_drop: false }`
[INFO] [stdout] c76a2c7cb5e03edf31ba7dea87d0a79e78bb8d82e65a50c24dc1b8eebfe771b5
[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" "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@sha256:824c28ce115f6b999260af6986f3384c158e782489540e41c0b698ca1d9fd927" "/opt/rustwide/cargo-home/bin/cargo" "+59d99f56d8888b0e5a5866d6418df3ca1bb90013" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8dd8496c4c51046fa45cbf2d1adbb3b2a1fc1eab330bed082aeb3aa24f27f8c8
[INFO] running `Command { std: "docker" "start" "-a" "8dd8496c4c51046fa45cbf2d1adbb3b2a1fc1eab330bed082aeb3aa24f27f8c8", kill_on_drop: false }`
[INFO] [stderr]     Checking rust_simple_http_server v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |         stream.map(echo);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |         stream.map(echo);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.17s
[INFO] running `Command { std: "docker" "inspect" "8dd8496c4c51046fa45cbf2d1adbb3b2a1fc1eab330bed082aeb3aa24f27f8c8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8dd8496c4c51046fa45cbf2d1adbb3b2a1fc1eab330bed082aeb3aa24f27f8c8", kill_on_drop: false }`
[INFO] [stdout] 8dd8496c4c51046fa45cbf2d1adbb3b2a1fc1eab330bed082aeb3aa24f27f8c8