[INFO] cloning repository https://github.com/aragorndev0912/rpn
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/aragorndev0912/rpn" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faragorndev0912%2Frpn", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faragorndev0912%2Frpn'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a4c700a5a8923d264d7ab9b5b5fcc2a0c44194f1
[INFO] building aragorndev0912/rpn against master#a29f341a8ac4e9325a5e37027b4215f50a76d06f for pr-101929
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faragorndev0912%2Frpn" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/aragorndev0912/rpn on toolchain a29f341a8ac4e9325a5e37027b4215f50a76d06f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a29f341a8ac4e9325a5e37027b4215f50a76d06f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/aragorndev0912/rpn
[INFO] finished tweaking git repo https://github.com/aragorndev0912/rpn
[INFO] tweaked toml for git repo https://github.com/aragorndev0912/rpn written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/aragorndev0912/rpn already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a29f341a8ac4e9325a5e37027b4215f50a76d06f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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:e92e462e59ac3446a933540fd361ddeb5362c86f92d432d6a560a917a465022e" "/opt/rustwide/cargo-home/bin/cargo" "+a29f341a8ac4e9325a5e37027b4215f50a76d06f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9bbf6222c7f64442907a554dcc732c495456ad70c90f36f10713d95ed00ceed4
[INFO] running `Command { std: "docker" "start" "-a" "9bbf6222c7f64442907a554dcc732c495456ad70c90f36f10713d95ed00ceed4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9bbf6222c7f64442907a554dcc732c495456ad70c90f36f10713d95ed00ceed4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9bbf6222c7f64442907a554dcc732c495456ad70c90f36f10713d95ed00ceed4", kill_on_drop: false }`
[INFO] [stdout] 9bbf6222c7f64442907a554dcc732c495456ad70c90f36f10713d95ed00ceed4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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:e92e462e59ac3446a933540fd361ddeb5362c86f92d432d6a560a917a465022e" "/opt/rustwide/cargo-home/bin/cargo" "+a29f341a8ac4e9325a5e37027b4215f50a76d06f" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e8c274306d35677deda21e57e89654f6d42bcbf01bc49e6adf05ea7e469b5dd5
[INFO] running `Command { std: "docker" "start" "-a" "e8c274306d35677deda21e57e89654f6d42bcbf01bc49e6adf05ea7e469b5dd5", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling rpn v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]    --> src/rpn.rs:167:5
[INFO] [stdout]     |
[INFO] [stdout] 167 |     (count)
[INFO] [stdout]     |     ^     ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 167 -     (count)
[INFO] [stdout] 167 +     count
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.38s
[INFO] running `Command { std: "docker" "inspect" "e8c274306d35677deda21e57e89654f6d42bcbf01bc49e6adf05ea7e469b5dd5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e8c274306d35677deda21e57e89654f6d42bcbf01bc49e6adf05ea7e469b5dd5", kill_on_drop: false }`
[INFO] [stdout] e8c274306d35677deda21e57e89654f6d42bcbf01bc49e6adf05ea7e469b5dd5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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:e92e462e59ac3446a933540fd361ddeb5362c86f92d432d6a560a917a465022e" "/opt/rustwide/cargo-home/bin/cargo" "+a29f341a8ac4e9325a5e37027b4215f50a76d06f" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1449506e7cc42d18fe190ec24d145a2a674ded9d7ae078f161e01a5392af40dc
[INFO] running `Command { std: "docker" "start" "-a" "1449506e7cc42d18fe190ec24d145a2a674ded9d7ae078f161e01a5392af40dc", kill_on_drop: false }`
[INFO] [stderr]    Compiling rpn v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]    --> src/rpn.rs:167:5
[INFO] [stdout]     |
[INFO] [stdout] 167 |     (count)
[INFO] [stdout]     |     ^     ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 167 -     (count)
[INFO] [stdout] 167 +     count
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.46s
[INFO] running `Command { std: "docker" "inspect" "1449506e7cc42d18fe190ec24d145a2a674ded9d7ae078f161e01a5392af40dc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1449506e7cc42d18fe190ec24d145a2a674ded9d7ae078f161e01a5392af40dc", kill_on_drop: false }`
[INFO] [stdout] 1449506e7cc42d18fe190ec24d145a2a674ded9d7ae078f161e01a5392af40dc