[INFO] cloning repository https://github.com/stratum-mining/stratum
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/stratum-mining/stratum" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstratum-mining%2Fstratum", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstratum-mining%2Fstratum'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 64e021cbac0d87527444f5d61d576d6a977d1e0b
[INFO] checking stratum-mining/stratum against master#f5f33ec0e0455eefa72fc5567eb1280a4d5ee206 for pr-83312
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstratum-mining%2Fstratum" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/stratum-mining/stratum on toolchain f5f33ec0e0455eefa72fc5567eb1280a4d5ee206
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f5f33ec0e0455eefa72fc5567eb1280a4d5ee206" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/stratum-mining/stratum
[INFO] finished tweaking git repo https://github.com/stratum-mining/stratum
[INFO] tweaked toml for git repo https://github.com/stratum-mining/stratum written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/stratum-mining/stratum already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f5f33ec0e0455eefa72fc5567eb1280a4d5ee206" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+f5f33ec0e0455eefa72fc5567eb1280a4d5ee206" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7c27c5508083f2660eb8872458398747c417aa9199b081ff3abbd25fd203b267
[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" "7c27c5508083f2660eb8872458398747c417aa9199b081ff3abbd25fd203b267", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7c27c5508083f2660eb8872458398747c417aa9199b081ff3abbd25fd203b267", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7c27c5508083f2660eb8872458398747c417aa9199b081ff3abbd25fd203b267", kill_on_drop: false }`
[INFO] [stdout] 7c27c5508083f2660eb8872458398747c417aa9199b081ff3abbd25fd203b267
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+f5f33ec0e0455eefa72fc5567eb1280a4d5ee206" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3973bfaf228d1040336026c300b8bd030056a1b80448a064f5306e6f4fbd59f6
[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" "3973bfaf228d1040336026c300b8bd030056a1b80448a064f5306e6f4fbd59f6", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.60
[INFO] [stderr]    Compiling libc v0.2.86
[INFO] [stderr]    Compiling value-bag v1.0.0-alpha.6
[INFO] [stderr]     Checking once_cell v1.5.2
[INFO] [stderr]     Checking cache-padded v1.1.1
[INFO] [stderr]     Checking parking v2.0.0
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling getrandom v0.2.2
[INFO] [stderr]     Checking atomic-waker v1.0.0
[INFO] [stderr]     Checking regex-syntax v0.6.22
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking slab v0.4.2
[INFO] [stderr]     Checking async-lock v2.3.0
[INFO] [stderr]     Checking bitcoin_hashes v0.3.2
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking concurrent-queue v1.2.2
[INFO] [stderr]     Checking crossbeam-utils v0.8.1
[INFO] [stderr]     Checking futures-lite v1.11.3
[INFO] [stderr]     Checking thread_local v1.1.3
[INFO] [stderr]     Checking async-channel v1.6.1
[INFO] [stderr]     Checking blocking v1.0.2
[INFO] [stderr]     Checking async-executor v1.4.0
[INFO] [stderr]     Checking regex v1.4.3
[INFO] [stderr]     Checking socket2 v0.3.19
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking rand_core v0.6.2
[INFO] [stderr]     Checking nb-connect v1.0.3
[INFO] [stderr]     Checking rand v0.8.3
[INFO] [stderr]    Compiling ctor v0.1.19
[INFO] [stderr]    Compiling serde_derive v1.0.123
[INFO] [stderr]    Compiling quickcheck_macros v1.0.0
[INFO] [stderr]     Checking log v0.4.14
[INFO] [stderr]     Checking polling v2.0.2
[INFO] [stderr]     Checking kv-log-macro v1.0.7
[INFO] [stderr]     Checking env_logger v0.8.3
[INFO] [stderr]     Checking async-io v1.3.1
[INFO] [stderr]     Checking quickcheck v1.0.3
[INFO] [stderr]     Checking async-global-executor v2.0.2
[INFO] [stderr]     Checking async-std v1.9.0
[INFO] [stderr]     Checking serde v1.0.123
[INFO] [stderr]     Checking serde_json v1.0.62
[INFO] [stderr]     Checking serde_v2 v0.1.0 (/opt/rustwide/workdir/protocols/v2/serde-sv2)
[INFO] [stderr]     Checking v1 v0.1.0 (/opt/rustwide/workdir/protocols/v1)
[INFO] [stderr]     Checking client_and_server v0.1.0 (/opt/rustwide/workdir/protocols/v1/examples/client-and-server)
[INFO] [stdout] warning: associated function is never used: `restore_subscribe`
[INFO] [stdout]    --> protocols/v1/examples/client-and-server/src/main.rs:338:18
[INFO] [stdout]     |
[INFO] [stdout] 338 |     pub async fn restore_subscribe(&mut self) {
[INFO] [stdout]     |                  ^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `restore_subscribe`
[INFO] [stdout]    --> protocols/v1/examples/client-and-server/src/main.rs:338:18
[INFO] [stdout]     |
[INFO] [stdout] 338 |     pub async fn restore_subscribe(&mut self) {
[INFO] [stdout]     |                  ^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 01s
[INFO] running `Command { std: "docker" "inspect" "3973bfaf228d1040336026c300b8bd030056a1b80448a064f5306e6f4fbd59f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3973bfaf228d1040336026c300b8bd030056a1b80448a064f5306e6f4fbd59f6", kill_on_drop: false }`
[INFO] [stdout] 3973bfaf228d1040336026c300b8bd030056a1b80448a064f5306e6f4fbd59f6