[INFO] cloning repository https://github.com/keathley/bf
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/keathley/bf" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkeathley%2Fbf", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkeathley%2Fbf'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ee0333994d3059a4f7765fc404fbb694a33c66c0
[INFO] checking keathley/bf against master#d902752866cbbdb331e3cf28ff6bba86ab0f6c62 for pr-77271
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkeathley%2Fbf" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/keathley/bf on toolchain d902752866cbbdb331e3cf28ff6bba86ab0f6c62
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d902752866cbbdb331e3cf28ff6bba86ab0f6c62" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/keathley/bf
[INFO] finished tweaking git repo https://github.com/keathley/bf
[INFO] tweaked toml for git repo https://github.com/keathley/bf written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/keathley/bf already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d902752866cbbdb331e3cf28ff6bba86ab0f6c62" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+d902752866cbbdb331e3cf28ff6bba86ab0f6c62" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0441d9c594ffd15db51f16b9d4a0939b1795151da673f2da4aef26a3cc634a15
[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" "0441d9c594ffd15db51f16b9d4a0939b1795151da673f2da4aef26a3cc634a15", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0441d9c594ffd15db51f16b9d4a0939b1795151da673f2da4aef26a3cc634a15", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0441d9c594ffd15db51f16b9d4a0939b1795151da673f2da4aef26a3cc634a15", kill_on_drop: false }`
[INFO] [stdout] 0441d9c594ffd15db51f16b9d4a0939b1795151da673f2da4aef26a3cc634a15
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+d902752866cbbdb331e3cf28ff6bba86ab0f6c62" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 52fc7edd13ffc586120003124c2ee574cbdf64fa5f27b53ebe7ec0176aebb38f
[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" "52fc7edd13ffc586120003124c2ee574cbdf64fa5f27b53ebe7ec0176aebb38f", kill_on_drop: false }`
[INFO] [stderr]     Checking libc v0.2.23
[INFO] [stderr]     Checking unicode-segmentation v1.2.0
[INFO] [stderr]     Checking strsim v0.6.0
[INFO] [stderr]     Checking term_size v0.3.0
[INFO] [stderr]     Checking atty v0.2.2
[INFO] [stderr]     Checking clap v2.24.2
[INFO] [stderr]     Checking bf v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `bytecode_to_string`
[INFO] [stdout]   --> src/interpreter/optimized.rs:17:4
[INFO] [stdout]    |
[INFO] [stdout] 17 | fn bytecode_to_string(ops: &Ops) -> String {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `bytecode_to_string`
[INFO] [stdout]   --> src/interpreter/optimized.rs:17:4
[INFO] [stdout]    |
[INFO] [stdout] 17 | fn bytecode_to_string(ops: &Ops) -> String {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.73s
[INFO] running `Command { std: "docker" "inspect" "52fc7edd13ffc586120003124c2ee574cbdf64fa5f27b53ebe7ec0176aebb38f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "52fc7edd13ffc586120003124c2ee574cbdf64fa5f27b53ebe7ec0176aebb38f", kill_on_drop: false }`
[INFO] [stdout] 52fc7edd13ffc586120003124c2ee574cbdf64fa5f27b53ebe7ec0176aebb38f