[INFO] fetching crate imap-proto 0.11.0...
[INFO] checking imap-proto-0.11.0 against beta for pr-78714
[INFO] extracting crate imap-proto 0.11.0 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate imap-proto 0.11.0 on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate imap-proto 0.11.0
[INFO] finished tweaking crates.io crate imap-proto 0.11.0
[INFO] tweaked toml for crates.io crate imap-proto 0.11.0 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate crates.io crate imap-proto 0.11.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "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-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5774f7f3c19fe5ebcdb1c2b2f70b2008e6412f0c97dd08e3525e44269fed31a0
[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" "5774f7f3c19fe5ebcdb1c2b2f70b2008e6412f0c97dd08e3525e44269fed31a0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5774f7f3c19fe5ebcdb1c2b2f70b2008e6412f0c97dd08e3525e44269fed31a0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5774f7f3c19fe5ebcdb1c2b2f70b2008e6412f0c97dd08e3525e44269fed31a0", kill_on_drop: false }`
[INFO] [stdout] 5774f7f3c19fe5ebcdb1c2b2f70b2008e6412f0c97dd08e3525e44269fed31a0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fa1555937fb28f8c514a34f6cae1f40f1c324f5be44d6ec03c78a9d720b24880
[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" "fa1555937fb28f8c514a34f6cae1f40f1c324f5be44d6ec03c78a9d720b24880", kill_on_drop: false }`
[INFO] [stderr]     Checking assert_matches v1.3.0
[INFO] [stderr]     Checking imap-proto v0.11.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.41s
[INFO] running `Command { std: "docker" "inspect" "fa1555937fb28f8c514a34f6cae1f40f1c324f5be44d6ec03c78a9d720b24880", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fa1555937fb28f8c514a34f6cae1f40f1c324f5be44d6ec03c78a9d720b24880", kill_on_drop: false }`
[INFO] [stdout] fa1555937fb28f8c514a34f6cae1f40f1c324f5be44d6ec03c78a9d720b24880