[INFO] cloning repository https://github.com/amscotti/rust_balanced_brackets
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/amscotti/rust_balanced_brackets" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Famscotti%2Frust_balanced_brackets", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Famscotti%2Frust_balanced_brackets'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] eca8dc8dedb54326a0968fc9ce47991c662eb41f
[INFO] checking amscotti/rust_balanced_brackets against master#a609fb45efad59dfd459c76e50899be9f0583b5a for pr-80579
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Famscotti%2Frust_balanced_brackets" "/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/amscotti/rust_balanced_brackets on toolchain a609fb45efad59dfd459c76e50899be9f0583b5a
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/amscotti/rust_balanced_brackets
[INFO] finished tweaking git repo https://github.com/amscotti/rust_balanced_brackets
[INFO] tweaked toml for git repo https://github.com/amscotti/rust_balanced_brackets written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/amscotti/rust_balanced_brackets already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "fetch" "--locked" "--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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "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] 28a105369431c3ef97899eba7596e5b33d59b52aaefe9a71330f3345b77df60a
[INFO] running `Command { std: "docker" "start" "-a" "28a105369431c3ef97899eba7596e5b33d59b52aaefe9a71330f3345b77df60a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "28a105369431c3ef97899eba7596e5b33d59b52aaefe9a71330f3345b77df60a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "28a105369431c3ef97899eba7596e5b33d59b52aaefe9a71330f3345b77df60a", kill_on_drop: false }`
[INFO] [stdout] 28a105369431c3ef97899eba7596e5b33d59b52aaefe9a71330f3345b77df60a
[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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "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] 7cee1d38ee5b16f5742e7b65ab09284e83f3727b2e67c5da447c4cb2243a51a5
[INFO] running `Command { std: "docker" "start" "-a" "7cee1d38ee5b16f5742e7b65ab09284e83f3727b2e67c5da447c4cb2243a51a5", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v0.1.4
[INFO] [stderr]     Checking stable_deref_trait v1.0.0
[INFO] [stderr]     Checking smallvec v0.4.0
[INFO] [stderr]     Checking unicode-width v0.1.4
[INFO] [stderr]     Checking rand v0.3.15
[INFO] [stderr]     Checking termios v0.3.1
[INFO] [stderr]     Checking atty v0.2.11
[INFO] [stderr]     Checking clicolors-control v1.0.0
[INFO] [stderr]     Checking regex v1.1.6
[INFO] [stderr]     Checking owning_ref v0.3.3
[INFO] [stderr]    Compiling num-traits v0.2.8
[INFO] [stderr]     Checking parking_lot_core v0.2.2
[INFO] [stderr]     Checking parking_lot v0.4.4
[INFO] [stderr]     Checking console v0.7.5
[INFO] [stderr]     Checking number_prefix v0.2.8
[INFO] [stderr]     Checking indicatif v0.11.0
[INFO] [stderr]     Checking rust_balanced_brackets v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.01s
[INFO] running `Command { std: "docker" "inspect" "7cee1d38ee5b16f5742e7b65ab09284e83f3727b2e67c5da447c4cb2243a51a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7cee1d38ee5b16f5742e7b65ab09284e83f3727b2e67c5da447c4cb2243a51a5", kill_on_drop: false }`
[INFO] [stdout] 7cee1d38ee5b16f5742e7b65ab09284e83f3727b2e67c5da447c4cb2243a51a5