[INFO] cloning repository https://github.com/Xijezu/ServerMonitor
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Xijezu/ServerMonitor" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FXijezu%2FServerMonitor", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FXijezu%2FServerMonitor'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3b72783f5d8d63b3dcbb3c39084aa77e90da0f50
[INFO] checking Xijezu/ServerMonitor against try#f47dd4da3ae8c32c9e65d307bfe640b143e674df for pr-77526
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FXijezu%2FServerMonitor" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Xijezu/ServerMonitor on toolchain f47dd4da3ae8c32c9e65d307bfe640b143e674df
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Xijezu/ServerMonitor
[INFO] finished tweaking git repo https://github.com/Xijezu/ServerMonitor
[INFO] tweaked toml for git repo https://github.com/Xijezu/ServerMonitor written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/Xijezu/ServerMonitor already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded named_pipe v0.3.0
[INFO] [stderr]   Downloaded mysql v15.1.0
[INFO] [stderr]   Downloaded atoi v0.3.1
[INFO] [stderr]   Downloaded mysql_common v0.15.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "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] b43887a4516446cabcb370e769d0a6085fc5769ee68c4058c4f956c4a08dfce6
[INFO] running `Command { std: "docker" "start" "-a" "b43887a4516446cabcb370e769d0a6085fc5769ee68c4058c4f956c4a08dfce6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b43887a4516446cabcb370e769d0a6085fc5769ee68c4058c4f956c4a08dfce6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b43887a4516446cabcb370e769d0a6085fc5769ee68c4058c4f956c4a08dfce6", kill_on_drop: false }`
[INFO] [stdout] b43887a4516446cabcb370e769d0a6085fc5769ee68c4058c4f956c4a08dfce6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "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] 4bfa8f65c1de469bd6283f87f341eef569966ac3655cef1bd2193313d72217aa
[INFO] running `Command { std: "docker" "start" "-a" "4bfa8f65c1de469bd6283f87f341eef569966ac3655cef1bd2193313d72217aa", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking rand_core v0.4.0
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling num-traits v0.2.6
[INFO] [stderr]    Compiling byteorder v1.3.1
[INFO] [stderr]    Compiling cc v1.0.35
[INFO] [stderr]     Checking smallvec v0.6.9
[INFO] [stderr]    Compiling crc32fast v1.2.0
[INFO] [stderr]     Checking lazy_static v1.3.0
[INFO] [stderr]     Checking bitflags v1.0.4
[INFO] [stderr]     Checking itoa v0.4.3
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]    Compiling mysql v15.1.0
[INFO] [stderr]     Checking uuid v0.7.4
[INFO] [stderr]     Checking sha1 v0.6.0
[INFO] [stderr]     Checking fnv v1.0.6
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]     Checking block-padding v0.1.3
[INFO] [stderr]     Checking regex-syntax v0.6.6
[INFO] [stderr]    Compiling proc-macro2 v0.4.27
[INFO] [stderr]     Checking thread_local v0.3.6
[INFO] [stderr]     Checking time v0.1.42
[INFO] [stderr]     Checking nix v0.12.0
[INFO] [stderr]     Checking net2 v0.2.33
[INFO] [stderr]     Checking generic-array v0.12.0
[INFO] [stderr]     Checking aho-corasick v0.7.3
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking rand_jitter v0.1.3
[INFO] [stderr]     Checking unicode-normalization v0.1.8
[INFO] [stderr]     Checking rand_xorshift v0.1.1
[INFO] [stderr]     Checking rand_hc v0.1.0
[INFO] [stderr]     Checking rand_isaac v0.1.1
[INFO] [stderr]     Checking digest v0.8.0
[INFO] [stderr]    Compiling quote v0.6.12
[INFO] [stderr]    Compiling syn v0.15.32
[INFO] [stderr]     Checking block-buffer v0.7.3
[INFO] [stderr]     Checking base64 v0.10.1
[INFO] [stderr]    Compiling miniz-sys v0.1.11
[INFO] [stderr]     Checking sha2 v0.8.0
[INFO] [stderr]     Checking idna v0.1.5
[INFO] [stderr]     Checking flate2 v1.0.7
[INFO] [stderr]     Checking num-integer v0.1.39
[INFO] [stderr]     Checking atoi v0.3.1
[INFO] [stderr]     Checking chrono v0.4.6
[INFO] [stderr]     Checking num-bigint v0.2.2
[INFO] [stderr]     Checking twox-hash v1.2.0
[INFO] [stderr]     Checking url v1.7.2
[INFO] [stderr]     Checking regex v1.1.6
[INFO] [stderr]    Compiling serde_derive v1.0.90
[INFO] [stderr]     Checking serde v1.0.90
[INFO] [stderr]     Checking serde_json v1.0.39
[INFO] [stderr]     Checking mysql_common v0.15.0
[INFO] [stderr]     Checking server_monitor v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/monitor.rs:109:17
[INFO] [stdout]     |
[INFO] [stdout] 109 |             for mut servers in self.servers.iter_mut() {
[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: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/monitor.rs:109:17
[INFO] [stdout]     |
[INFO] [stdout] 109 |             for mut servers in self.servers.iter_mut() {
[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: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 08s
[INFO] running `Command { std: "docker" "inspect" "4bfa8f65c1de469bd6283f87f341eef569966ac3655cef1bd2193313d72217aa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4bfa8f65c1de469bd6283f87f341eef569966ac3655cef1bd2193313d72217aa", kill_on_drop: false }`
[INFO] [stdout] 4bfa8f65c1de469bd6283f87f341eef569966ac3655cef1bd2193313d72217aa