[INFO] cloning repository https://github.com/kimikan/miox
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kimikan/miox" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkimikan%2Fmiox", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkimikan%2Fmiox'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 74c8daa530d2caa733771b0142a7259528cc81d3
[INFO] checking kimikan/miox against try#ddfd70ee3c3748e597b32f416b0d15a4f6e37685 for pr-87050
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkimikan%2Fmiox" "/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/kimikan/miox on toolchain ddfd70ee3c3748e597b32f416b0d15a4f6e37685
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/kimikan/miox
[INFO] finished tweaking git repo https://github.com/kimikan/miox
[INFO] tweaked toml for git repo https://github.com/kimikan/miox written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/kimikan/miox already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 78c1254e8c9a96376d95108adc79cfb7c5690b8e852a494453fba607d7f193ad
[INFO] running `Command { std: "docker" "start" "-a" "78c1254e8c9a96376d95108adc79cfb7c5690b8e852a494453fba607d7f193ad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "78c1254e8c9a96376d95108adc79cfb7c5690b8e852a494453fba607d7f193ad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "78c1254e8c9a96376d95108adc79cfb7c5690b8e852a494453fba607d7f193ad", kill_on_drop: false }`
[INFO] [stdout] 78c1254e8c9a96376d95108adc79cfb7c5690b8e852a494453fba607d7f193ad
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6eb50c925148e2d6b3c220d09120f5f1bd3a107dd1cd3640db25fa3a5d982bd2
[INFO] running `Command { std: "docker" "start" "-a" "6eb50c925148e2d6b3c220d09120f5f1bd3a107dd1cd3640db25fa3a5d982bd2", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking slab v0.3.0
[INFO] [stderr]     Checking lazycell v0.4.0
[INFO] [stderr]     Checking log v0.3.8
[INFO] [stderr]     Checking byteorder v1.0.0
[INFO] [stderr]     Checking iovec v0.1.0
[INFO] [stderr]     Checking net2 v0.2.29
[INFO] [stderr]     Checking mio v0.6.9
[INFO] [stderr]     Checking miox v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around `match` scrutinee expression
[INFO] [stdout]    --> src/connection.rs:154:15
[INFO] [stdout]     |
[INFO] [stdout] 154 |         match (write_result) {
[INFO] [stdout]     |               ^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `match` scrutinee expression
[INFO] [stdout]    --> src/connection.rs:154:15
[INFO] [stdout]     |
[INFO] [stdout] 154 |         match (write_result) {
[INFO] [stdout]     |               ^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `mio::Ready::is_error`: use UnixReady instead
[INFO] [stdout]   --> src/server.rs:71:18
[INFO] [stdout]    |
[INFO] [stdout] 71 |         if ready.is_error() {
[INFO] [stdout]    |                  ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `mio::Ready::is_error`: use UnixReady instead
[INFO] [stdout]   --> src/server.rs:71:18
[INFO] [stdout]    |
[INFO] [stdout] 71 |         if ready.is_error() {
[INFO] [stdout]    |                  ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/server.rs:96:25
[INFO] [stdout]    |
[INFO] [stdout] 96 |             if let Some(mut c) = client {
[INFO] [stdout]    |                         ----^
[INFO] [stdout]    |                         |
[INFO] [stdout]    |                         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/server.rs:96:25
[INFO] [stdout]    |
[INFO] [stdout] 96 |             if let Some(mut c) = client {
[INFO] [stdout]    |                         ----^
[INFO] [stdout]    |                         |
[INFO] [stdout]    |                         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.75s
[INFO] running `Command { std: "docker" "inspect" "6eb50c925148e2d6b3c220d09120f5f1bd3a107dd1cd3640db25fa3a5d982bd2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6eb50c925148e2d6b3c220d09120f5f1bd3a107dd1cd3640db25fa3a5d982bd2", kill_on_drop: false }`
[INFO] [stdout] 6eb50c925148e2d6b3c220d09120f5f1bd3a107dd1cd3640db25fa3a5d982bd2