[INFO] cloning repository https://github.com/yaowenqiang/rust_csv_demo
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/yaowenqiang/rust_csv_demo" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyaowenqiang%2Frust_csv_demo", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyaowenqiang%2Frust_csv_demo'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] cc41a3a699a50caff16fbf8bc4489d27bbe00796
[INFO] checking yaowenqiang/rust_csv_demo against try#3e22d1f9053c0fc87629b3c6d5d9567856368e5d for pr-78714
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyaowenqiang%2Frust_csv_demo" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/yaowenqiang/rust_csv_demo on toolchain 3e22d1f9053c0fc87629b3c6d5d9567856368e5d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/yaowenqiang/rust_csv_demo
[INFO] finished tweaking git repo https://github.com/yaowenqiang/rust_csv_demo
[INFO] tweaked toml for git repo https://github.com/yaowenqiang/rust_csv_demo written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/yaowenqiang/rust_csv_demo already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bb7b21f0f0d0bacc051fd154e234a2d6928d26b7f53359e30630e5aaf9b3f0df
[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" "bb7b21f0f0d0bacc051fd154e234a2d6928d26b7f53359e30630e5aaf9b3f0df", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bb7b21f0f0d0bacc051fd154e234a2d6928d26b7f53359e30630e5aaf9b3f0df", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bb7b21f0f0d0bacc051fd154e234a2d6928d26b7f53359e30630e5aaf9b3f0df", kill_on_drop: false }`
[INFO] [stdout] bb7b21f0f0d0bacc051fd154e234a2d6928d26b7f53359e30630e5aaf9b3f0df
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ca6dfbf20b998b5398ef0cf4c13cf9c773ea53d0d59421fdb4af5592bc2398d2
[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" "ca6dfbf20b998b5398ef0cf4c13cf9c773ea53d0d59421fdb4af5592bc2398d2", kill_on_drop: false }`
[INFO] [stderr]     Checking tracing-core v0.1.13
[INFO] [stderr]     Checking serde_json v1.0.57
[INFO] [stderr]     Checking futures-util v0.3.5
[INFO] [stderr]     Checking tracing v0.1.18
[INFO] [stderr]     Checking h2 v0.2.6
[INFO] [stderr]     Checking hyper v0.13.7
[INFO] [stderr]     Checking hyper-tls v0.4.3
[INFO] [stderr]     Checking reqwest v0.10.7
[INFO] [stderr]     Checking csv_demo v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: argument never used
[INFO] [stdout]   --> src/main.rs:59:61
[INFO] [stdout]    |
[INFO] [stdout] 59 |         let request_url = format!("http://localhost:8889/", line) ;
[INFO] [stdout]    |                                   ------------------------  ^^^^ argument never used
[INFO] [stdout]    |                                   |
[INFO] [stdout]    |                                   formatting specifier missing
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::process`
[INFO] [stdout]   --> src/main.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use std::process;
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `csv_demo`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: argument never used
[INFO] [stdout]   --> src/main.rs:59:61
[INFO] [stdout]    |
[INFO] [stdout] 59 |         let request_url = format!("http://localhost:8889/", line) ;
[INFO] [stdout]    |                                   ------------------------  ^^^^ argument never used
[INFO] [stdout]    |                                   |
[INFO] [stdout]    |                                   formatting specifier missing
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::process`
[INFO] [stdout]   --> src/main.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use std::process;
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "ca6dfbf20b998b5398ef0cf4c13cf9c773ea53d0d59421fdb4af5592bc2398d2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ca6dfbf20b998b5398ef0cf4c13cf9c773ea53d0d59421fdb4af5592bc2398d2", kill_on_drop: false }`
[INFO] [stdout] ca6dfbf20b998b5398ef0cf4c13cf9c773ea53d0d59421fdb4af5592bc2398d2