[INFO] fetching crate rbsg-backend 0.0.1...
[INFO] checking rbsg-backend-0.0.1 against try#1c5262aa6c045a581fb974488793f09ed51fc498 for pr-78376
[INFO] extracting crate rbsg-backend 0.0.1 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate rbsg-backend 0.0.1 on toolchain 1c5262aa6c045a581fb974488793f09ed51fc498
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1c5262aa6c045a581fb974488793f09ed51fc498" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rbsg-backend 0.0.1
[INFO] finished tweaking crates.io crate rbsg-backend 0.0.1
[INFO] tweaked toml for crates.io crate rbsg-backend 0.0.1 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate crates.io crate rbsg-backend 0.0.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1c5262aa6c045a581fb974488793f09ed51fc498" "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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1c5262aa6c045a581fb974488793f09ed51fc498" "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] 7eea6a90a82d78cefb450d628de02b0bd27d5b3fe86bbdc355eaed451c783eaf
[INFO] running `Command { std: "docker" "start" "-a" "7eea6a90a82d78cefb450d628de02b0bd27d5b3fe86bbdc355eaed451c783eaf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7eea6a90a82d78cefb450d628de02b0bd27d5b3fe86bbdc355eaed451c783eaf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7eea6a90a82d78cefb450d628de02b0bd27d5b3fe86bbdc355eaed451c783eaf", kill_on_drop: false }`
[INFO] [stdout] 7eea6a90a82d78cefb450d628de02b0bd27d5b3fe86bbdc355eaed451c783eaf
[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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1c5262aa6c045a581fb974488793f09ed51fc498" "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] 54944e717ca2b86b4d8db8767904e4a978a1647639577e797e6e3c7fd570e54e
[INFO] running `Command { std: "docker" "start" "-a" "54944e717ca2b86b4d8db8767904e4a978a1647639577e797e6e3c7fd570e54e", kill_on_drop: false }`
[INFO] [stderr]     Checking rbsg-backend v0.0.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.39s
[INFO] running `Command { std: "docker" "inspect" "54944e717ca2b86b4d8db8767904e4a978a1647639577e797e6e3c7fd570e54e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "54944e717ca2b86b4d8db8767904e4a978a1647639577e797e6e3c7fd570e54e", kill_on_drop: false }`
[INFO] [stdout] 54944e717ca2b86b4d8db8767904e4a978a1647639577e797e6e3c7fd570e54e