[INFO] cloning repository https://github.com/bruno319/sync-mqtt-client
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/bruno319/sync-mqtt-client" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbruno319%2Fsync-mqtt-client", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbruno319%2Fsync-mqtt-client'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] df030801652162296dbc37561ec15e18a014dfcc
[INFO] checking bruno319/sync-mqtt-client against master#5e3f1b148db5bfa27fee52464ae1f5d34c49d77b for pr-75502
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbruno319%2Fsync-mqtt-client" "/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/bruno319/sync-mqtt-client on toolchain 5e3f1b148db5bfa27fee52464ae1f5d34c49d77b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5e3f1b148db5bfa27fee52464ae1f5d34c49d77b" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/bruno319/sync-mqtt-client
[INFO] finished tweaking git repo https://github.com/bruno319/sync-mqtt-client
[INFO] tweaked toml for git repo https://github.com/bruno319/sync-mqtt-client written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/bruno319/sync-mqtt-client already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5e3f1b148db5bfa27fee52464ae1f5d34c49d77b" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+5e3f1b148db5bfa27fee52464ae1f5d34c49d77b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ace91b43fa715b616ec8300a633e0295ea81967216763decbaff0ab337795d0c
[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" "ace91b43fa715b616ec8300a633e0295ea81967216763decbaff0ab337795d0c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ace91b43fa715b616ec8300a633e0295ea81967216763decbaff0ab337795d0c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ace91b43fa715b616ec8300a633e0295ea81967216763decbaff0ab337795d0c", kill_on_drop: false }`
[INFO] [stdout] ace91b43fa715b616ec8300a633e0295ea81967216763decbaff0ab337795d0c
[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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+5e3f1b148db5bfa27fee52464ae1f5d34c49d77b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4b5b4cc4f19ae72fcf71e5a73f421cc120fbae5156cd78a1b75003f10beb9ad0
[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" "4b5b4cc4f19ae72fcf71e5a73f421cc120fbae5156cd78a1b75003f10beb9ad0", kill_on_drop: false }`
[INFO] [stderr]    Compiling cc v1.0.54
[INFO] [stderr]    Compiling gimli v0.21.0
[INFO] [stderr]    Compiling object v0.19.0
[INFO] [stderr]    Compiling ansi_term v0.11.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.18
[INFO] [stderr]    Compiling strsim v0.8.0
[INFO] [stderr]    Compiling syn v1.0.31
[INFO] [stderr]     Checking smallvec v1.4.0
[INFO] [stderr]     Checking futures v0.1.29
[INFO] [stderr]    Compiling nom v4.2.3
[INFO] [stderr]    Compiling memoffset v0.5.4
[INFO] [stderr]    Compiling libc v0.2.71
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]     Checking log v0.4.8
[INFO] [stderr]     Checking lock_api v0.3.4
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]    Compiling crossbeam-epoch v0.8.2
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]     Checking maybe-uninit v2.0.0
[INFO] [stderr]     Checking crc32fast v1.2.0
[INFO] [stderr]     Checking parking_lot_core v0.7.2
[INFO] [stderr]     Checking fs2 v0.4.3
[INFO] [stderr]    Compiling cmake v0.1.44
[INFO] [stderr]    Compiling aho-corasick v0.7.10
[INFO] [stderr]     Checking fxhash v0.2.1
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling clap v2.33.1
[INFO] [stderr]     Checking parking_lot v0.10.2
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]     Checking futures-timer v0.1.1
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]    Compiling regex v1.3.9
[INFO] [stderr]    Compiling libloading v0.5.2
[INFO] [stderr]    Compiling cexpr v0.3.6
[INFO] [stderr]    Compiling clang-sys v0.28.1
[INFO] [stderr]     Checking addr2line v0.12.1
[INFO] [stderr]    Compiling env_logger v0.6.2
[INFO] [stderr]     Checking backtrace v0.3.48
[INFO] [stderr]     Checking sled v0.32.0-rc1
[INFO] [stderr]    Compiling failure v0.1.8
[INFO] [stderr]    Compiling which v2.0.1
[INFO] [stderr]    Compiling bindgen v0.50.1
[INFO] [stderr]    Compiling num-derive v0.3.0
[INFO] [stderr]    Compiling paho-mqtt-sys v0.2.1 (https://github.com/eclipse/paho.mqtt.rust.git?rev=f92e43a9e252cf0fe552c5420eb41005e454140a#f92e43a9)
[INFO] [stderr]     Checking paho-mqtt v0.7.0 (https://github.com/eclipse/paho.mqtt.rust.git?rev=f92e43a9e252cf0fe552c5420eb41005e454140a#f92e43a9)
[INFO] [stderr]     Checking queue-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/queue.rs:44:9
[INFO] [stdout]    |
[INFO] [stdout] 44 |         self.storage.clear();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/queue.rs:44:9
[INFO] [stdout]    |
[INFO] [stdout] 44 |         self.storage.clear();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2m 12s
[INFO] running `Command { std: "docker" "inspect" "4b5b4cc4f19ae72fcf71e5a73f421cc120fbae5156cd78a1b75003f10beb9ad0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4b5b4cc4f19ae72fcf71e5a73f421cc120fbae5156cd78a1b75003f10beb9ad0", kill_on_drop: false }`
[INFO] [stdout] 4b5b4cc4f19ae72fcf71e5a73f421cc120fbae5156cd78a1b75003f10beb9ad0