[INFO] cloning repository https://github.com/oYOvOYo/Rust.Playground
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/oYOvOYo/Rust.Playground" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FoYOvOYo%2FRust.Playground", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FoYOvOYo%2FRust.Playground'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d9755f0fd0bb5d7d62d5421321f5671ab75d6a86
[INFO] checking oYOvOYo/Rust.Playground against try#ffa4a0215752773248fb0f0a8092f1c3e7907e9e for pr-75585
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FoYOvOYo%2FRust.Playground" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/oYOvOYo/Rust.Playground on toolchain ffa4a0215752773248fb0f0a8092f1c3e7907e9e
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ffa4a0215752773248fb0f0a8092f1c3e7907e9e" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/oYOvOYo/Rust.Playground
[INFO] finished tweaking git repo https://github.com/oYOvOYo/Rust.Playground
[INFO] tweaked toml for git repo https://github.com/oYOvOYo/Rust.Playground written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/oYOvOYo/Rust.Playground already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ffa4a0215752773248fb0f0a8092f1c3e7907e9e" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "+ffa4a0215752773248fb0f0a8092f1c3e7907e9e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 560895e206b99970a9a5cb3a72bd7caec9e0f7353c5da80c48f6a8fb30cdfbf1
[INFO] running `Command { std: "docker" "start" "-a" "560895e206b99970a9a5cb3a72bd7caec9e0f7353c5da80c48f6a8fb30cdfbf1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "560895e206b99970a9a5cb3a72bd7caec9e0f7353c5da80c48f6a8fb30cdfbf1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "560895e206b99970a9a5cb3a72bd7caec9e0f7353c5da80c48f6a8fb30cdfbf1", kill_on_drop: false }`
[INFO] [stdout] 560895e206b99970a9a5cb3a72bd7caec9e0f7353c5da80c48f6a8fb30cdfbf1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "+ffa4a0215752773248fb0f0a8092f1c3e7907e9e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 14fcfe73a088a80dc666ebedf42d2924eca0d139137d7d11f2490f2e43474dbe
[INFO] running `Command { std: "docker" "start" "-a" "14fcfe73a088a80dc666ebedf42d2924eca0d139137d7d11f2490f2e43474dbe", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking rand_core v0.4.2
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]     Checking rand v0.5.6
[INFO] [stderr]     Checking playground v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.33s
[INFO] running `Command { std: "docker" "inspect" "14fcfe73a088a80dc666ebedf42d2924eca0d139137d7d11f2490f2e43474dbe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "14fcfe73a088a80dc666ebedf42d2924eca0d139137d7d11f2490f2e43474dbe", kill_on_drop: false }`
[INFO] [stdout] 14fcfe73a088a80dc666ebedf42d2924eca0d139137d7d11f2490f2e43474dbe