[INFO] cloning repository https://github.com/fansanelli/rust_attack
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/fansanelli/rust_attack" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffansanelli%2Frust_attack", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffansanelli%2Frust_attack'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 32826867216ad1633f4aa12d4168f4300a52ef5e
[INFO] building fansanelli/rust_attack 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%2Ffansanelli%2Frust_attack" "/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/fansanelli/rust_attack 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/fansanelli/rust_attack
[INFO] finished tweaking git repo https://github.com/fansanelli/rust_attack
[INFO] tweaked toml for git repo https://github.com/fansanelli/rust_attack written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/fansanelli/rust_attack 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-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] 8f88570658191fde8c5e55f71e68da638d40c1f795cf6b26fee7c6cbf1cf8721
[INFO] running `Command { std: "docker" "start" "-a" "8f88570658191fde8c5e55f71e68da638d40c1f795cf6b26fee7c6cbf1cf8721", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8f88570658191fde8c5e55f71e68da638d40c1f795cf6b26fee7c6cbf1cf8721", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8f88570658191fde8c5e55f71e68da638d40c1f795cf6b26fee7c6cbf1cf8721", kill_on_drop: false }`
[INFO] [stdout] 8f88570658191fde8c5e55f71e68da638d40c1f795cf6b26fee7c6cbf1cf8721
[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] 5030e6e2717b7bdc8a97474899b126fdbeb1878f1085a85ef67e8899b6d18027
[INFO] running `Command { std: "docker" "start" "-a" "5030e6e2717b7bdc8a97474899b126fdbeb1878f1085a85ef67e8899b6d18027", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.147
[INFO] [stderr]    Compiling num-traits v0.2.16
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling num-bigint v0.4.3
[INFO] [stderr]    Compiling num-iter v0.1.43
[INFO] [stderr]    Compiling getrandom v0.2.10
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling rust_attack v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `brent` is never used
[INFO] [stdout]  --> src/brent.rs:5:4
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn brent(n: BigInt) -> BigInt {
[INFO] [stdout]   |    ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.28s
[INFO] running `Command { std: "docker" "inspect" "5030e6e2717b7bdc8a97474899b126fdbeb1878f1085a85ef67e8899b6d18027", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5030e6e2717b7bdc8a97474899b126fdbeb1878f1085a85ef67e8899b6d18027", kill_on_drop: false }`
[INFO] [stdout] 5030e6e2717b7bdc8a97474899b126fdbeb1878f1085a85ef67e8899b6d18027
[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] 661ca326a0715d3ecb7844fff76ed3044e702bba92d0fc95623dd0a74dd52636
[INFO] running `Command { std: "docker" "start" "-a" "661ca326a0715d3ecb7844fff76ed3044e702bba92d0fc95623dd0a74dd52636", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust_attack v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `brent` is never used
[INFO] [stdout]  --> src/brent.rs:5:4
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn brent(n: BigInt) -> BigInt {
[INFO] [stdout]   |    ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `brent` is never used
[INFO] [stdout]  --> src/brent.rs:5:4
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn brent(n: BigInt) -> BigInt {
[INFO] [stdout]   |    ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.54s
[INFO] running `Command { std: "docker" "inspect" "661ca326a0715d3ecb7844fff76ed3044e702bba92d0fc95623dd0a74dd52636", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "661ca326a0715d3ecb7844fff76ed3044e702bba92d0fc95623dd0a74dd52636", kill_on_drop: false }`
[INFO] [stdout] 661ca326a0715d3ecb7844fff76ed3044e702bba92d0fc95623dd0a74dd52636