[INFO] fetching crate stratum-server 2.0.0...
[INFO] checking stratum-server-2.0.0 against master#0d37dca25a51fb900a402c94c8818ad1c2789e30 for pr-77526
[INFO] extracting crate stratum-server 2.0.0 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate stratum-server 2.0.0 on toolchain 0d37dca25a51fb900a402c94c8818ad1c2789e30
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate stratum-server 2.0.0
[INFO] finished tweaking crates.io crate stratum-server 2.0.0
[INFO] tweaked toml for crates.io crate stratum-server 2.0.0 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 32f04d7ec6cd433608dd4c05efc816ca259c7188a7ecee650185dc9d66704ddd
[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" "32f04d7ec6cd433608dd4c05efc816ca259c7188a7ecee650185dc9d66704ddd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "32f04d7ec6cd433608dd4c05efc816ca259c7188a7ecee650185dc9d66704ddd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "32f04d7ec6cd433608dd4c05efc816ca259c7188a7ecee650185dc9d66704ddd", kill_on_drop: false }`
[INFO] [stdout] 32f04d7ec6cd433608dd4c05efc816ca259c7188a7ecee650185dc9d66704ddd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "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] f32e8dca3dbdfe488f6057b9aa2eecbd12740670db315e5969c4312dcbe79aa5
[INFO] running `Command { std: "docker" "start" "-a" "f32e8dca3dbdfe488f6057b9aa2eecbd12740670db315e5969c4312dcbe79aa5", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.42
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling typenum v1.12.0
[INFO] [stderr]    Compiling serde v1.0.116
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]     Checking futures-core v0.3.6
[INFO] [stderr]     Checking futures-io v0.3.6
[INFO] [stderr]     Checking subtle v2.3.0
[INFO] [stderr]    Compiling proc-macro-hack v0.5.18
[INFO] [stderr]    Compiling getrandom v0.1.15
[INFO] [stderr]     Checking pin-project-lite v0.1.10
[INFO] [stderr]     Checking fastrand v1.4.0
[INFO] [stderr]     Checking percent-encoding v2.1.0
[INFO] [stderr]    Compiling autocfg v0.1.7
[INFO] [stderr]    Compiling const_fn v0.4.2
[INFO] [stderr]     Checking pin-utils v0.1.0
[INFO] [stderr]     Checking ppv-lite86 v0.2.9
[INFO] [stderr]    Compiling pin-project-internal v0.4.26
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling proc-macro-nested v0.1.6
[INFO] [stderr]     Checking cpuid-bool v0.1.2
[INFO] [stderr]     Checking opaque-debug v0.3.0
[INFO] [stderr]     Checking base64 v0.12.3
[INFO] [stderr]    Compiling http-types v2.5.0
[INFO] [stderr]     Checking data-encoding v2.3.0
[INFO] [stderr]     Checking infer v0.2.3
[INFO] [stderr]     Checking regex-syntax v0.6.18
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]     Checking hex v0.4.2
[INFO] [stderr]    Compiling prometheus v0.10.0
[INFO] [stderr]     Checking unicode-width v0.1.8
[INFO] [stderr]     Checking route-recognizer v0.2.0
[INFO] [stderr]     Checking encodings v0.1.0
[INFO] [stderr]     Checking oorandom v11.1.2
[INFO] [stderr]     Checking instant v0.1.7
[INFO] [stderr]    Compiling generic-array v0.14.4
[INFO] [stderr]    Compiling standback v0.2.11
[INFO] [stderr]    Compiling time v0.2.22
[INFO] [stderr]    Compiling num-traits v0.2.12
[INFO] [stderr]    Compiling cookie v0.14.2
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]    Compiling num-integer v0.1.43
[INFO] [stderr]    Compiling rayon v1.4.1
[INFO] [stderr]     Checking futures-task v0.3.6
[INFO] [stderr]     Checking rand_jitter v0.1.4
[INFO] [stderr]     Checking lock_api v0.4.1
[INFO] [stderr]     Checking form_urlencoded v1.0.0
[INFO] [stderr]     Checking futures-channel v0.3.6
[INFO] [stderr]     Checking itertools v0.9.0
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]     Checking extended-primitives v0.3.5
[INFO] [stderr]     Checking log v0.4.11
[INFO] [stderr]     Checking async-channel v1.5.0
[INFO] [stderr]     Checking rand_isaac v0.1.1
[INFO] [stderr]     Checking rand_xorshift v0.1.1
[INFO] [stderr]     Checking rand_hc v0.1.0
[INFO] [stderr]     Checking idna v0.2.0
[INFO] [stderr]     Checking nb-connect v1.0.2
[INFO] [stderr]     Checking parking_lot_core v0.8.0
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]    Compiling cast v0.2.3
[INFO] [stderr]     Checking libflate v1.0.2
[INFO] [stderr]     Checking crossbeam-channel v0.4.4
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking polling v2.0.0
[INFO] [stderr]     Checking kv-log-macro v1.0.7
[INFO] [stderr]     Checking logtest v2.0.0
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking futures-lite v1.10.1
[INFO] [stderr]     Checking aho-corasick v0.7.13
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]     Checking byte-pool v0.2.2
[INFO] [stderr]     Checking parking_lot v0.11.0
[INFO] [stderr]     Checking regex-automata v0.1.9
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rayon-core v1.8.1
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking procfs v0.8.1
[INFO] [stderr]     Checking criterion-plot v0.4.3
[INFO] [stderr]     Checking plotters v0.2.15
[INFO] [stderr]     Checking async-io v1.1.9
[INFO] [stderr]     Checking async-executor v1.3.0
[INFO] [stderr]     Checking blocking v1.0.1
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking universal-hash v0.4.0
[INFO] [stderr]     Checking digest v0.9.0
[INFO] [stderr]     Checking block-cipher v0.7.1
[INFO] [stderr]     Checking crypto-mac v0.8.0
[INFO] [stderr]     Checking block-buffer v0.9.0
[INFO] [stderr]     Checking aead v0.3.2
[INFO] [stderr]     Checking polyval v0.4.1
[INFO] [stderr]     Checking aes-soft v0.4.0
[INFO] [stderr]     Checking async-global-executor v1.3.0
[INFO] [stderr]     Checking hmac v0.8.1
[INFO] [stderr]     Checking sha2 v0.9.1
[INFO] [stderr]     Checking ghash v0.3.0
[INFO] [stderr]     Checking hkdf v0.9.0
[INFO] [stderr]     Checking portpicker v0.1.0
[INFO] [stderr]     Checking aes v0.4.0
[INFO] [stderr]     Checking aes-gcm v0.6.0
[INFO] [stderr]     Checking regex v1.3.9
[INFO] [stderr]    Compiling serde_derive v1.0.116
[INFO] [stderr]    Compiling time-macros-impl v0.1.1
[INFO] [stderr]    Compiling thiserror-impl v1.0.21
[INFO] [stderr]    Compiling async-attributes v1.1.1
[INFO] [stderr]    Compiling futures-macro v0.3.6
[INFO] [stderr]    Compiling async-trait v0.1.41
[INFO] [stderr]     Checking async-std v1.6.5
[INFO] [stderr]     Checking time-macros v0.1.1
[INFO] [stderr]     Checking thiserror v1.0.21
[INFO] [stderr]     Checking pin-project v0.4.26
[INFO] [stderr]     Checking futures-util v0.3.6
[INFO] [stderr]     Checking futures-executor v0.3.6
[INFO] [stderr]     Checking futures v0.3.6
[INFO] [stderr]     Checking serde_json v1.0.58
[INFO] [stderr]     Checking serde_urlencoded v0.7.0
[INFO] [stderr]     Checking serde_qs v0.7.0
[INFO] [stderr]     Checking url v2.1.1
[INFO] [stderr]     Checking bstr v0.2.13
[INFO] [stderr]     Checking serde_cbor v0.11.1
[INFO] [stderr]     Checking uuid v0.8.1
[INFO] [stderr]     Checking csv v1.1.3
[INFO] [stderr]     Checking femme v2.1.1
[INFO] [stderr]     Checking tinytemplate v1.1.0
[INFO] [stderr]     Checking criterion v0.3.3
[INFO] [stderr]     Checking async-h1 v2.1.2
[INFO] [stderr]     Checking async-sse v4.0.1
[INFO] [stderr]     Checking tide v0.12.0
[INFO] [stderr]     Checking stratum-server v2.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `async_std::net::TcpStream`
[INFO] [stdout]  --> tests/basic_server_websocket_test.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use async_std::net::TcpStream;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `async_std::prelude::FutureExt`
[INFO] [stdout]  --> tests/basic_server_websocket_test.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use async_std::prelude::FutureExt;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `futures::io::AsyncWriteExt`
[INFO] [stdout]  --> tests/basic_server_websocket_test.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use futures::io::AsyncWriteExt;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `futures::SinkExt`
[INFO] [stdout]  --> tests/basic_server_websocket_test.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use futures::SinkExt;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::time::Duration`
[INFO] [stdout]  --> tests/basic_server_websocket_test.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::time::Duration;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `stratum_server::StratumServer`
[INFO] [stdout]  --> tests/basic_server_websocket_test.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use stratum_server::StratumServer;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `StratumResult`
[INFO] [stdout]   --> tests/basic_server_websocket_test.rs:10:50
[INFO] [stdout]    |
[INFO] [stdout] 10 | use stratum_server::{Connection, StratumRequest, StratumResult};
[INFO] [stdout]    |                                                  ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `find_port`
[INFO] [stdout]  --> tests/common.rs:3:14
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub async fn find_port() -> u16 {
[INFO] [stdout]   |              ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `StratumResult`
[INFO] [stdout]  --> tests/basic_server_tcp_test.rs:7:50
[INFO] [stdout]   |
[INFO] [stdout] 7 | use stratum_server::{Connection, StratumRequest, StratumResult};
[INFO] [stdout]   |                                                  ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> tests/basic_server_tcp_test.rs:51:9
[INFO] [stdout]    |
[INFO] [stdout] 51 |         server.start().await;
[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: unused `std::result::Result` that must be used
[INFO] [stdout]   --> tests/basic_server_tcp_test.rs:61:9
[INFO] [stdout]    |
[INFO] [stdout] 61 |         stream.write_all(msg.as_bytes()).await;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> tests/basic_server_tcp_test.rs:62:9
[INFO] [stdout]    |
[INFO] [stdout] 62 |         stream.write_all(b"\n").await;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 52s
[INFO] running `Command { std: "docker" "inspect" "f32e8dca3dbdfe488f6057b9aa2eecbd12740670db315e5969c4312dcbe79aa5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f32e8dca3dbdfe488f6057b9aa2eecbd12740670db315e5969c4312dcbe79aa5", kill_on_drop: false }`
[INFO] [stdout] f32e8dca3dbdfe488f6057b9aa2eecbd12740670db315e5969c4312dcbe79aa5