[INFO] cloning repository https://github.com/pvillega/gene-pool
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/pvillega/gene-pool" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpvillega%2Fgene-pool", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpvillega%2Fgene-pool'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7f189ed51304b0186cffccc1d058677a562b86da
[INFO] building pvillega/gene-pool 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%2Fpvillega%2Fgene-pool" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/pvillega/gene-pool 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/pvillega/gene-pool
[INFO] finished tweaking git repo https://github.com/pvillega/gene-pool
[INFO] tweaked toml for git repo https://github.com/pvillega/gene-pool written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/pvillega/gene-pool 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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded libc v0.2.92
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] b0382696856dddcf358d20ec86eec0150bfa85f9f3591a6a90dc2307c76a894e
[INFO] running `Command { std: "docker" "start" "-a" "b0382696856dddcf358d20ec86eec0150bfa85f9f3591a6a90dc2307c76a894e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b0382696856dddcf358d20ec86eec0150bfa85f9f3591a6a90dc2307c76a894e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b0382696856dddcf358d20ec86eec0150bfa85f9f3591a6a90dc2307c76a894e", kill_on_drop: false }`
[INFO] [stdout] b0382696856dddcf358d20ec86eec0150bfa85f9f3591a6a90dc2307c76a894e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] edd0a4d29535f4d6edb1bb8b8c725f7729160bf364d1f65f2b1b7ef845c9e637
[INFO] running `Command { std: "docker" "start" "-a" "edd0a4d29535f4d6edb1bb8b8c725f7729160bf364d1f65f2b1b7ef845c9e637", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.92
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling ppv-lite86 v0.2.10
[INFO] [stderr]    Compiling sample-lib v0.1.0 (/opt/rustwide/workdir/sample-lib)
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling guess-the-number v0.1.0 (/opt/rustwide/workdir/guess-the-number)
[INFO] [stdout] warning: fields `name` and `age` are never read
[INFO] [stdout]  --> guess-the-number/src/main.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct Person<'a> {
[INFO] [stdout]   |        ------ fields in this struct
[INFO] [stdout] 8 |     name: &'a str,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 9 |     age: u8,
[INFO] [stdout]   |     ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Person` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.64s
[INFO] running `Command { std: "docker" "inspect" "edd0a4d29535f4d6edb1bb8b8c725f7729160bf364d1f65f2b1b7ef845c9e637", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "edd0a4d29535f4d6edb1bb8b8c725f7729160bf364d1f65f2b1b7ef845c9e637", kill_on_drop: false }`
[INFO] [stdout] edd0a4d29535f4d6edb1bb8b8c725f7729160bf364d1f65f2b1b7ef845c9e637
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 77ee5d6a2786938cd5cfe99767c3b190623de17dc671477b3fc978eaf91239b4
[INFO] running `Command { std: "docker" "start" "-a" "77ee5d6a2786938cd5cfe99767c3b190623de17dc671477b3fc978eaf91239b4", kill_on_drop: false }`
[INFO] [stderr]    Compiling sample-lib v0.1.0 (/opt/rustwide/workdir/sample-lib)
[INFO] [stderr]    Compiling guess-the-number v0.1.0 (/opt/rustwide/workdir/guess-the-number)
[INFO] [stdout] warning: fields `name` and `age` are never read
[INFO] [stdout]  --> guess-the-number/src/main.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct Person<'a> {
[INFO] [stdout]   |        ------ fields in this struct
[INFO] [stdout] 8 |     name: &'a str,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 9 |     age: u8,
[INFO] [stdout]   |     ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Person` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.24s
[INFO] running `Command { std: "docker" "inspect" "77ee5d6a2786938cd5cfe99767c3b190623de17dc671477b3fc978eaf91239b4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "77ee5d6a2786938cd5cfe99767c3b190623de17dc671477b3fc978eaf91239b4", kill_on_drop: false }`
[INFO] [stdout] 77ee5d6a2786938cd5cfe99767c3b190623de17dc671477b3fc978eaf91239b4