[INFO] cloning repository https://github.com/aesteve/rustlings
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/aesteve/rustlings" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faesteve%2Frustlings", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faesteve%2Frustlings'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4ac2e7f5ea545ba7a0ca9fc7b80aa0d035194a5c
[INFO] checking aesteve/rustlings against master#c5fbcd35a8217a17f6b63a22217ace06cf8f5f02 for pr-86194
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faesteve%2Frustlings" "/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/aesteve/rustlings on toolchain c5fbcd35a8217a17f6b63a22217ace06cf8f5f02
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c5fbcd35a8217a17f6b63a22217ace06cf8f5f02" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/aesteve/rustlings
[INFO] finished tweaking git repo https://github.com/aesteve/rustlings
[INFO] tweaked toml for git repo https://github.com/aesteve/rustlings written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/aesteve/rustlings already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c5fbcd35a8217a17f6b63a22217ace06cf8f5f02" "fetch" "--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+c5fbcd35a8217a17f6b63a22217ace06cf8f5f02" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] af76d1c7f0064029de797fadf13eda329b1e532b6ce9804c42c33c40a18731b4
[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" "af76d1c7f0064029de797fadf13eda329b1e532b6ce9804c42c33c40a18731b4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "af76d1c7f0064029de797fadf13eda329b1e532b6ce9804c42c33c40a18731b4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "af76d1c7f0064029de797fadf13eda329b1e532b6ce9804c42c33c40a18731b4", kill_on_drop: false }`
[INFO] [stdout] af76d1c7f0064029de797fadf13eda329b1e532b6ce9804c42c33c40a18731b4
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+c5fbcd35a8217a17f6b63a22217ace06cf8f5f02" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 43805dcd56942ef805a16aa32a687b2cd8dbb9dab7a7a04d126adfd5872abb49
[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" "43805dcd56942ef805a16aa32a687b2cd8dbb9dab7a7a04d126adfd5872abb49", kill_on_drop: false }`
[INFO] [stderr]     Checking slab v0.4.2
[INFO] [stderr]    Compiling escargot v0.4.0
[INFO] [stderr]     Checking predicates-core v1.0.0
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking treeline v0.1.0
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking normalize-line-endings v0.2.2
[INFO] [stderr]     Checking difference v2.0.0
[INFO] [stderr]     Checking vec_map v0.8.1
[INFO] [stderr]     Checking mio v0.6.19
[INFO] [stderr]     Checking predicates v1.0.1
[INFO] [stderr]     Checking predicates-tree v1.0.0
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking mio-extras v2.0.5
[INFO] [stderr]     Checking notify v4.0.15
[INFO] [stderr]     Checking assert_cmd v0.11.1
[INFO] [stderr]     Checking rustlings v4.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.52s
[INFO] running `Command { std: "docker" "inspect" "43805dcd56942ef805a16aa32a687b2cd8dbb9dab7a7a04d126adfd5872abb49", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "43805dcd56942ef805a16aa32a687b2cd8dbb9dab7a7a04d126adfd5872abb49", kill_on_drop: false }`
[INFO] [stdout] 43805dcd56942ef805a16aa32a687b2cd8dbb9dab7a7a04d126adfd5872abb49