[INFO] cloning repository https://github.com/richwandell/rust-redis
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/richwandell/rust-redis" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frichwandell%2Frust-redis", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frichwandell%2Frust-redis'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 007a63ae69d3327a7bee9bf02ad04a55e9421a25
[INFO] checking richwandell/rust-redis against try#07fecb9cf34c4979a772ba38c99d6d9144768413 for pr-87710
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frichwandell%2Frust-redis" "/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/richwandell/rust-redis on toolchain 07fecb9cf34c4979a772ba38c99d6d9144768413
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+07fecb9cf34c4979a772ba38c99d6d9144768413" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/richwandell/rust-redis
[INFO] finished tweaking git repo https://github.com/richwandell/rust-redis
[INFO] tweaked toml for git repo https://github.com/richwandell/rust-redis written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/richwandell/rust-redis already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+07fecb9cf34c4979a772ba38c99d6d9144768413" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded shell-words v1.0.0
[INFO] [stderr]   Downloaded thread-id v3.3.0
[INFO] [stderr]   Downloaded owning_ref v0.2.4
[INFO] [stderr]   Downloaded spmc v0.3.0
[INFO] [stderr]   Downloaded parking_lot v0.3.8
[INFO] [stderr]   Downloaded multiqueue v0.3.2
[INFO] [stderr]   Downloaded cookie-factory v0.2.4
[INFO] [stderr]   Downloaded crc16 v0.3.4
[INFO] [stderr]   Downloaded smallvec v0.3.4
[INFO] [stderr]   Downloaded redis-protocol v2.0.0
[INFO] [stderr]   Downloaded pretty_env_logger v0.2.5
[INFO] [stderr]   Downloaded redis-protocol-parser v0.1.2
[INFO] [stderr]   Downloaded resp v1.0.2
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+07fecb9cf34c4979a772ba38c99d6d9144768413" "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] 2c66dc63c2e22e08ea1e59b058bb932b3ba581bdd9ea7954741331ccd2495274
[INFO] running `Command { std: "docker" "start" "-a" "2c66dc63c2e22e08ea1e59b058bb932b3ba581bdd9ea7954741331ccd2495274", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2c66dc63c2e22e08ea1e59b058bb932b3ba581bdd9ea7954741331ccd2495274", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2c66dc63c2e22e08ea1e59b058bb932b3ba581bdd9ea7954741331ccd2495274", kill_on_drop: false }`
[INFO] [stdout] 2c66dc63c2e22e08ea1e59b058bb932b3ba581bdd9ea7954741331ccd2495274
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+07fecb9cf34c4979a772ba38c99d6d9144768413" "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] d0dfbbf1f7355e40fb03f96a1a79832f2083586acff463718678b7d496c6c2d3
[INFO] running `Command { std: "docker" "start" "-a" "d0dfbbf1f7355e40fb03f96a1a79832f2083586acff463718678b7d496c6c2d3", 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] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]     Checking owning_ref v0.2.4
[INFO] [stderr]     Checking futures v0.1.31
[INFO] [stderr]     Checking crossbeam v0.2.12
[INFO] [stderr]     Checking smallvec v0.3.4
[INFO] [stderr]     Checking redis-protocol-parser v0.1.2
[INFO] [stderr]     Checking shell-words v1.0.0
[INFO] [stderr]     Checking resp v1.0.2
[INFO] [stderr]     Checking glob v0.3.0
[INFO] [stderr]     Checking spmc v0.3.0
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]     Checking encoding_rs v0.8.28
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking smallvec v0.6.14
[INFO] [stderr]     Checking thread-id v3.3.0
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking parking_lot_core v0.2.14
[INFO] [stderr]     Checking aho-corasick v0.7.18
[INFO] [stderr]     Checking nom v4.2.3
[INFO] [stderr]     Checking parking_lot v0.3.8
[INFO] [stderr]     Checking multiqueue v0.3.2
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking encoding_rs_io v0.1.7
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]     Checking env_logger v0.5.13
[INFO] [stderr]     Checking pretty_env_logger v0.2.5
[INFO] [stderr]     Checking redis-protocol v2.0.0
[INFO] [stderr]     Checking redis-clone v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/thread_loop.rs:60:13
[INFO] [stdout]    |
[INFO] [stdout] 60 |             &stream_mutex1.lock().unwrap().write(message.as_ref());
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 60 |             let _ = &stream_mutex1.lock().unwrap().write(message.as_ref());
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/thread_loop.rs:60:13
[INFO] [stdout]    |
[INFO] [stdout] 60 |             &stream_mutex1.lock().unwrap().write(message.as_ref());
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 60 |             let _ = &stream_mutex1.lock().unwrap().write(message.as_ref());
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 12.60s
[INFO] running `Command { std: "docker" "inspect" "d0dfbbf1f7355e40fb03f96a1a79832f2083586acff463718678b7d496c6c2d3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d0dfbbf1f7355e40fb03f96a1a79832f2083586acff463718678b7d496c6c2d3", kill_on_drop: false }`
[INFO] [stdout] d0dfbbf1f7355e40fb03f96a1a79832f2083586acff463718678b7d496c6c2d3