[INFO] cloning repository https://github.com/y24o2/head
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/y24o2/head" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fy24o2%2Fhead", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fy24o2%2Fhead'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] cba17478ced86e96342f2822f77f516665d4dff7
[INFO] building y24o2/head against master#11663cd3bfefef7d34e8f0892c250bf698049392+rustflags=-Dtail-expr-drop-order for pr-134523
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fy24o2%2Fhead" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/y24o2/head on toolchain 11663cd3bfefef7d34e8f0892c250bf698049392
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/y24o2/head
[INFO] finished tweaking git repo https://github.com/y24o2/head
[INFO] tweaked toml for git repo https://github.com/y24o2/head written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/y24o2/head 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" "+11663cd3bfefef7d34e8f0892c250bf698049392" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0fca423f05c47739d014bf2ec6a149613f8c5166896c720c590ff91603c6ab2f
[INFO] running `Command { std: "docker" "start" "-a" "0fca423f05c47739d014bf2ec6a149613f8c5166896c720c590ff91603c6ab2f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0fca423f05c47739d014bf2ec6a149613f8c5166896c720c590ff91603c6ab2f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0fca423f05c47739d014bf2ec6a149613f8c5166896c720c590ff91603c6ab2f", kill_on_drop: false }`
[INFO] [stdout] 0fca423f05c47739d014bf2ec6a149613f8c5166896c720c590ff91603c6ab2f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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 -Dtail-expr-drop-order" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c9736be1b0aec143b556b371083973ad913d192a4b35a72f0876d1c476cd15e3
[INFO] running `Command { std: "docker" "start" "-a" "c9736be1b0aec143b556b371083973ad913d192a4b35a72f0876d1c476cd15e3", kill_on_drop: false }`
[INFO] [stderr]    Compiling head v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around index expression
[INFO] [stdout]   --> src/main.rs:31:66
[INFO] [stdout]    |
[INFO] [stdout] 31 | ...   let _n:u32 = if args.contains(&String::from("-n")) {args[(args.iter().position(|a| a == "-n").unwrap() + 1)].parse::<u32>().unwrap(...
[INFO] [stdout]    |                                                                ^                                                ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 31 -         let _n:u32 = if args.contains(&String::from("-n")) {args[(args.iter().position(|a| a == "-n").unwrap() + 1)].parse::<u32>().unwrap()} else {10};
[INFO] [stdout] 31 +         let _n:u32 = if args.contains(&String::from("-n")) {args[args.iter().position(|a| a == "-n").unwrap() + 1].parse::<u32>().unwrap()} else {10};
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.45s
[INFO] running `Command { std: "docker" "inspect" "c9736be1b0aec143b556b371083973ad913d192a4b35a72f0876d1c476cd15e3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c9736be1b0aec143b556b371083973ad913d192a4b35a72f0876d1c476cd15e3", kill_on_drop: false }`
[INFO] [stdout] c9736be1b0aec143b556b371083973ad913d192a4b35a72f0876d1c476cd15e3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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 -Dtail-expr-drop-order" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6d890c80ab4e0f07ff7f495264ce41b3f0b053c9f115e799d565467debb7e2ad
[INFO] running `Command { std: "docker" "start" "-a" "6d890c80ab4e0f07ff7f495264ce41b3f0b053c9f115e799d565467debb7e2ad", kill_on_drop: false }`
[INFO] [stderr]    Compiling head v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around index expression
[INFO] [stdout]   --> src/main.rs:31:66
[INFO] [stdout]    |
[INFO] [stdout] 31 | ...   let _n:u32 = if args.contains(&String::from("-n")) {args[(args.iter().position(|a| a == "-n").unwrap() + 1)].parse::<u32>().unwrap(...
[INFO] [stdout]    |                                                                ^                                                ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 31 -         let _n:u32 = if args.contains(&String::from("-n")) {args[(args.iter().position(|a| a == "-n").unwrap() + 1)].parse::<u32>().unwrap()} else {10};
[INFO] [stdout] 31 +         let _n:u32 = if args.contains(&String::from("-n")) {args[args.iter().position(|a| a == "-n").unwrap() + 1].parse::<u32>().unwrap()} else {10};
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.24s
[INFO] running `Command { std: "docker" "inspect" "6d890c80ab4e0f07ff7f495264ce41b3f0b053c9f115e799d565467debb7e2ad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6d890c80ab4e0f07ff7f495264ce41b3f0b053c9f115e799d565467debb7e2ad", kill_on_drop: false }`
[INFO] [stdout] 6d890c80ab4e0f07ff7f495264ce41b3f0b053c9f115e799d565467debb7e2ad