[INFO] fetching crate barrel 0.6.5...
[INFO] checking barrel-0.6.5 against try#05c8870159e4f328578a970e125aa76d24f03b56 for pr-76219
[INFO] extracting crate barrel 0.6.5 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate barrel 0.6.5 on toolchain 05c8870159e4f328578a970e125aa76d24f03b56
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+05c8870159e4f328578a970e125aa76d24f03b56" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate barrel 0.6.5
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate barrel 0.6.5
[INFO] tweaked toml for crates.io crate barrel 0.6.5 written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate crates.io crate barrel 0.6.5 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+05c8870159e4f328578a970e125aa76d24f03b56" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "+05c8870159e4f328578a970e125aa76d24f03b56" "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] 7af61a24628581e9dfb0ae118b37c7f200b7fbbf5a7c0c2c642d426fda850e43
[INFO] running `Command { std: "docker" "start" "-a" "7af61a24628581e9dfb0ae118b37c7f200b7fbbf5a7c0c2c642d426fda850e43", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7af61a24628581e9dfb0ae118b37c7f200b7fbbf5a7c0c2c642d426fda850e43", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7af61a24628581e9dfb0ae118b37c7f200b7fbbf5a7c0c2c642d426fda850e43", kill_on_drop: false }`
[INFO] [stdout] 7af61a24628581e9dfb0ae118b37c7f200b7fbbf5a7c0c2c642d426fda850e43
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "+05c8870159e4f328578a970e125aa76d24f03b56" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a4d145b167f45b37db479d1782ae2879a78df66e385a800f1a1f1027b9d70e65
[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" "a4d145b167f45b37db479d1782ae2879a78df66e385a800f1a1f1027b9d70e65", kill_on_drop: false }`
[INFO] [stderr]     Checking barrel v0.6.5 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.98s
[INFO] running `Command { std: "docker" "inspect" "a4d145b167f45b37db479d1782ae2879a78df66e385a800f1a1f1027b9d70e65", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a4d145b167f45b37db479d1782ae2879a78df66e385a800f1a1f1027b9d70e65", kill_on_drop: false }`
[INFO] [stdout] a4d145b167f45b37db479d1782ae2879a78df66e385a800f1a1f1027b9d70e65