[INFO] cloning repository https://github.com/k0nserv/rust-isqrt
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/k0nserv/rust-isqrt" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fk0nserv%2Frust-isqrt", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fk0nserv%2Frust-isqrt'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d4c67523ffb63badc9e5455d9852c971d63fc9f1
[INFO] checking k0nserv/rust-isqrt against try#894d32a5432c6a6461bb2aac7c3d5f2e87dce83f for pr-77015
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fk0nserv%2Frust-isqrt" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/k0nserv/rust-isqrt on toolchain 894d32a5432c6a6461bb2aac7c3d5f2e87dce83f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+894d32a5432c6a6461bb2aac7c3d5f2e87dce83f" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/k0nserv/rust-isqrt
[INFO] finished tweaking git repo https://github.com/k0nserv/rust-isqrt
[INFO] tweaked toml for git repo https://github.com/k0nserv/rust-isqrt written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/k0nserv/rust-isqrt already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+894d32a5432c6a6461bb2aac7c3d5f2e87dce83f" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "+894d32a5432c6a6461bb2aac7c3d5f2e87dce83f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 172d7d0c9949e93740df72ca7d996d048060b6f8ae4b7d9c5ee52815410df0f0
[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" "172d7d0c9949e93740df72ca7d996d048060b6f8ae4b7d9c5ee52815410df0f0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "172d7d0c9949e93740df72ca7d996d048060b6f8ae4b7d9c5ee52815410df0f0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "172d7d0c9949e93740df72ca7d996d048060b6f8ae4b7d9c5ee52815410df0f0", kill_on_drop: false }`
[INFO] [stdout] 172d7d0c9949e93740df72ca7d996d048060b6f8ae4b7d9c5ee52815410df0f0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "+894d32a5432c6a6461bb2aac7c3d5f2e87dce83f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4c6793c7c2973c9e5094aa3e023fe7a844d104ae5f07468e3a0a07d8e8b44f34
[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" "4c6793c7c2973c9e5094aa3e023fe7a844d104ae5f07468e3a0a07d8e8b44f34", kill_on_drop: false }`
[INFO] [stderr]     Checking isqrt v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `isqrt_transmute`
[INFO] [stdout]  --> src/lib.rs:6:4
[INFO] [stdout]   |
[INFO] [stdout] 6 | fn isqrt_transmute(value: f64) -> f64 {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `isqrt_no_transmute`
[INFO] [stdout]   --> src/lib.rs:18:4
[INFO] [stdout]    |
[INFO] [stdout] 18 | fn isqrt_no_transmute(value: f64) -> f64 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `isqrt_sqrt`
[INFO] [stdout]   --> src/lib.rs:30:4
[INFO] [stdout]    |
[INFO] [stdout] 30 | fn isqrt_sqrt(value: f64) -> f64 {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.19s
[INFO] running `Command { std: "docker" "inspect" "4c6793c7c2973c9e5094aa3e023fe7a844d104ae5f07468e3a0a07d8e8b44f34", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4c6793c7c2973c9e5094aa3e023fe7a844d104ae5f07468e3a0a07d8e8b44f34", kill_on_drop: false }`
[INFO] [stdout] 4c6793c7c2973c9e5094aa3e023fe7a844d104ae5f07468e3a0a07d8e8b44f34