[INFO] cloning repository https://github.com/tracehelms/rustlings-solutions
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tracehelms/rustlings-solutions" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftracehelms%2Frustlings-solutions", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftracehelms%2Frustlings-solutions'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ca99473627ba8e1178a743f4f0c2d39f92bb8d7d
[INFO] checking tracehelms/rustlings-solutions against master#5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f for pr-87248
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftracehelms%2Frustlings-solutions" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/tracehelms/rustlings-solutions on toolchain 5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/tracehelms/rustlings-solutions
[INFO] finished tweaking git repo https://github.com/tracehelms/rustlings-solutions
[INFO] tweaked toml for git repo https://github.com/tracehelms/rustlings-solutions written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/tracehelms/rustlings-solutions already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1ff14cfae5ab172913c87d776b177848eb56eebb194087bbdb1831270a08c482
[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" "1ff14cfae5ab172913c87d776b177848eb56eebb194087bbdb1831270a08c482", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1ff14cfae5ab172913c87d776b177848eb56eebb194087bbdb1831270a08c482", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1ff14cfae5ab172913c87d776b177848eb56eebb194087bbdb1831270a08c482", kill_on_drop: false }`
[INFO] [stdout] 1ff14cfae5ab172913c87d776b177848eb56eebb194087bbdb1831270a08c482
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a337114e8e567110833d4c3da63da3742d231ca0d0e76a1cdd642bed95cb530a
[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" "a337114e8e567110833d4c3da63da3742d231ca0d0e76a1cdd642bed95cb530a", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]     Checking slab v0.4.2
[INFO] [stderr]     Checking lazycell v1.2.1
[INFO] [stderr]     Checking vec_map v0.8.1
[INFO] [stderr]     Checking glob v0.3.0
[INFO] [stderr]     Checking mio v0.6.19
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling parking_lot_core v0.5.0
[INFO] [stderr]    Compiling parking_lot v0.8.0
[INFO] [stderr]    Compiling quote v0.6.12
[INFO] [stderr]     Checking mio-extras v2.0.5
[INFO] [stderr]    Compiling syn v0.15.34
[INFO] [stderr]     Checking notify v4.0.15
[INFO] [stderr]     Checking indicatif v0.10.3
[INFO] [stderr]     Checking console v0.7.7
[INFO] [stderr]    Compiling serde_derive v1.0.92
[INFO] [stderr]     Checking serde v1.0.92
[INFO] [stderr]     Checking serde_json v1.0.39
[INFO] [stderr]     Checking toml v0.4.10
[INFO] [stderr]     Checking rustlings v4.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking escargot v0.4.0
[INFO] [stderr]     Checking assert_cmd v0.11.1
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 45.23s
[INFO] running `Command { std: "docker" "inspect" "a337114e8e567110833d4c3da63da3742d231ca0d0e76a1cdd642bed95cb530a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a337114e8e567110833d4c3da63da3742d231ca0d0e76a1cdd642bed95cb530a", kill_on_drop: false }`
[INFO] [stdout] a337114e8e567110833d4c3da63da3742d231ca0d0e76a1cdd642bed95cb530a