[INFO] cloning repository https://github.com/cfsamson/rust-introduction-example
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/cfsamson/rust-introduction-example" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcfsamson%2Frust-introduction-example", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcfsamson%2Frust-introduction-example'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f3691ea4de4eb1a00318b5d208633e15d9b44d58
[INFO] checking cfsamson/rust-introduction-example against master#2ad5292aea6328113b55968b4322528d48261316 for pr-80243
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcfsamson%2Frust-introduction-example" "/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/cfsamson/rust-introduction-example on toolchain 2ad5292aea6328113b55968b4322528d48261316
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+2ad5292aea6328113b55968b4322528d48261316" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/cfsamson/rust-introduction-example
[INFO] finished tweaking git repo https://github.com/cfsamson/rust-introduction-example
[INFO] tweaked toml for git repo https://github.com/cfsamson/rust-introduction-example written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/cfsamson/rust-introduction-example already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+2ad5292aea6328113b55968b4322528d48261316" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+2ad5292aea6328113b55968b4322528d48261316" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4f3dda4dd95f7518594aace47c492b52aba6e2ebd002024e90d8f2cddbe045b7
[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" "4f3dda4dd95f7518594aace47c492b52aba6e2ebd002024e90d8f2cddbe045b7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4f3dda4dd95f7518594aace47c492b52aba6e2ebd002024e90d8f2cddbe045b7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4f3dda4dd95f7518594aace47c492b52aba6e2ebd002024e90d8f2cddbe045b7", kill_on_drop: false }`
[INFO] [stdout] 4f3dda4dd95f7518594aace47c492b52aba6e2ebd002024e90d8f2cddbe045b7
[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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+2ad5292aea6328113b55968b4322528d48261316" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7335c575004072ca77a019d2cf0c88d3d2ae2f21f93710dc9672ecd4a71ea63a
[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" "7335c575004072ca77a019d2cf0c88d3d2ae2f21f93710dc9672ecd4a71ea63a", kill_on_drop: false }`
[INFO] [stderr]     Checking slotvec v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.44s
[INFO] running `Command { std: "docker" "inspect" "7335c575004072ca77a019d2cf0c88d3d2ae2f21f93710dc9672ecd4a71ea63a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7335c575004072ca77a019d2cf0c88d3d2ae2f21f93710dc9672ecd4a71ea63a", kill_on_drop: false }`
[INFO] [stdout] 7335c575004072ca77a019d2cf0c88d3d2ae2f21f93710dc9672ecd4a71ea63a