[INFO] cloning repository https://github.com/davnav/rust-covidstatus-bot [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/davnav/rust-covidstatus-bot" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdavnav%2Frust-covidstatus-bot", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdavnav%2Frust-covidstatus-bot'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 56e65888922893eb7b8c0eab081d7b10376dc1be [INFO] checking davnav/rust-covidstatus-bot against try#8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8 for pr-82565 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdavnav%2Frust-covidstatus-bot" "/workspace/builds/worker-8/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/davnav/rust-covidstatus-bot on toolchain 8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/davnav/rust-covidstatus-bot [INFO] finished tweaking git repo https://github.com/davnav/rust-covidstatus-bot [INFO] tweaked toml for git repo https://github.com/davnav/rust-covidstatus-bot written to /workspace/builds/worker-8/source/Cargo.toml [INFO] crate git repo https://github.com/davnav/rust-covidstatus-bot already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] warning: unused manifest key: dependencies.serde.feature [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Downloading crates ... [INFO] [stderr] Downloaded fastrand v1.3.4 [INFO] [stderr] Downloaded tracing-core v0.1.14 [INFO] [stderr] Downloaded combine v4.2.1 [INFO] [stderr] Downloaded event-listener v2.3.3 [INFO] [stderr] Downloaded async-std v1.6.3 [INFO] [stderr] Downloaded async-executor v0.1.2 [INFO] [stderr] Downloaded vec-arena v0.5.0 [INFO] [stderr] Downloaded async-mutex v1.1.5 [INFO] [stderr] Downloaded async-trait v0.1.37 [INFO] [stderr] Downloaded async-io v0.1.11 [INFO] [stderr] Downloaded futures-lite v0.1.11 [INFO] [stderr] Downloaded tracing-attributes v0.1.10 [INFO] [stderr] Downloaded polling v0.1.5 [INFO] [stderr] Downloaded blocking v0.5.1 [INFO] [stderr] Downloaded telegram-bot-raw v0.7.0 [INFO] [stderr] Downloaded redis v0.17.0 [INFO] [stderr] Downloaded telegram-bot v0.7.0 [INFO] [stderr] Downloaded async-channel v1.4.0 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "+8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 3eaa9fbb69507d2bc3b29db37c675e74d3fcd2cf031e18bf12cbfec5f52fb47d [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" "3eaa9fbb69507d2bc3b29db37c675e74d3fcd2cf031e18bf12cbfec5f52fb47d", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "3eaa9fbb69507d2bc3b29db37c675e74d3fcd2cf031e18bf12cbfec5f52fb47d", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "3eaa9fbb69507d2bc3b29db37c675e74d3fcd2cf031e18bf12cbfec5f52fb47d", kill_on_drop: false }` [INFO] [stdout] 3eaa9fbb69507d2bc3b29db37c675e74d3fcd2cf031e18bf12cbfec5f52fb47d [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "+8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] ac9a6fa3671c7ffd0f0e79eeeee530dd20bc89273a2f3fbc48478754c26c15ab [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" "ac9a6fa3671c7ffd0f0e79eeeee530dd20bc89273a2f3fbc48478754c26c15ab", kill_on_drop: false }` [INFO] [stderr] warning: unused manifest key: dependencies.serde.feature [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Compiling libc v0.2.74 [INFO] [stderr] Checking cfg-if v0.1.10 [INFO] [stderr] Compiling proc-macro2 v1.0.19 [INFO] [stderr] Compiling unicode-xid v0.2.1 [INFO] [stderr] Compiling syn v1.0.38 [INFO] [stderr] Checking futures-core v0.3.5 [INFO] [stderr] Compiling rand_core v0.4.2 [INFO] [stderr] Checking lazy_static v1.4.0 [INFO] [stderr] Checking slab v0.4.2 [INFO] [stderr] Checking pin-project-lite v0.1.7 [INFO] [stderr] Checking once_cell v1.4.0 [INFO] [stderr] Checking futures-io v0.3.5 [INFO] [stderr] Compiling pin-project-internal v0.4.23 [INFO] [stderr] Checking bytes v0.5.6 [INFO] [stderr] Checking futures-sink v0.3.5 [INFO] [stderr] Checking fnv v1.0.7 [INFO] [stderr] Compiling proc-macro-nested v0.1.6 [INFO] [stderr] Compiling cc v1.0.58 [INFO] [stderr] Compiling proc-macro-hack v0.5.18 [INFO] [stderr] Compiling pkg-config v0.3.18 [INFO] [stderr] Checking pin-utils v0.1.0 [INFO] [stderr] Checking arc-swap v0.4.7 [INFO] [stderr] Compiling siphasher v0.2.3 [INFO] [stderr] Checking itoa v0.4.6 [INFO] [stderr] Compiling getrandom v0.1.14 [INFO] [stderr] Checking cache-padded v1.1.1 [INFO] [stderr] Compiling serde_derive v1.0.115 [INFO] [stderr] Checking fastrand v1.3.4 [INFO] [stderr] Compiling bitflags v1.2.1 [INFO] [stderr] Compiling serde v1.0.115 [INFO] [stderr] Compiling openssl v0.10.30 [INFO] [stderr] Checking parking v2.0.0 [INFO] [stderr] Checking waker-fn v1.0.0 [INFO] [stderr] Compiling ryu v1.0.5 [INFO] [stderr] Checking ppv-lite86 v0.2.8 [INFO] [stderr] Checking event-listener v2.3.3 [INFO] [stderr] Checking try-lock v0.2.3 [INFO] [stderr] Compiling serde_json v1.0.57 [INFO] [stderr] Checking tinyvec v0.3.3 [INFO] [stderr] Checking async-task v3.0.0 [INFO] [stderr] Checking vec-arena v0.5.0 [INFO] [stderr] Checking matches v0.1.8 [INFO] [stderr] Checking remove_dir_all v0.5.3 [INFO] [stderr] Checking atomic-waker v1.0.0 [INFO] [stderr] Checking percent-encoding v2.1.0 [INFO] [stderr] Checking dtoa v0.4.6 [INFO] [stderr] Compiling unicase v1.4.2 [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] Compiling num-traits v0.2.12 [INFO] [stderr] Compiling hashbrown v0.8.2 [INFO] [stderr] Compiling indexmap v1.5.1 [INFO] [stderr] Compiling crossbeam-utils v0.7.2 [INFO] [stderr] Compiling num-integer v0.1.43 [INFO] [stderr] Checking tracing-core v0.1.14 [INFO] [stderr] Checking futures-channel v0.3.5 [INFO] [stderr] Compiling rand_core v0.3.1 [INFO] [stderr] Compiling rand_jitter v0.1.4 [INFO] [stderr] Checking futures-task v0.3.5 [INFO] [stderr] Checking concurrent-queue v1.2.2 [INFO] [stderr] Checking http v0.2.1 [INFO] [stderr] Checking async-mutex v1.1.5 [INFO] [stderr] Checking log v0.4.11 [INFO] [stderr] Checking unicode-bidi v0.3.4 [INFO] [stderr] Checking unicode-normalization v0.1.13 [INFO] [stderr] Compiling rand_hc v0.1.0 [INFO] [stderr] Compiling rand_isaac v0.1.1 [INFO] [stderr] Compiling rand_xorshift v0.1.1 [INFO] [stderr] Checking futures-lite v0.1.11 [INFO] [stderr] Checking async-channel v1.4.0 [INFO] [stderr] Checking multitask v0.2.0 [INFO] [stderr] Checking log v0.3.9 [INFO] [stderr] Checking want v0.3.0 [INFO] [stderr] Checking kv-log-macro v1.0.7 [INFO] [stderr] Compiling phf_shared v0.7.24 [INFO] [stderr] Compiling quote v1.0.7 [INFO] [stderr] Checking idna v0.2.0 [INFO] [stderr] Checking mime v0.2.6 [INFO] [stderr] Compiling phf v0.7.24 [INFO] [stderr] Compiling rand_os v0.1.3 [INFO] [stderr] Checking blocking v0.5.1 [INFO] [stderr] Checking net2 v0.2.34 [INFO] [stderr] Checking iovec v0.1.4 [INFO] [stderr] Checking num_cpus v1.13.0 [INFO] [stderr] Checking signal-hook-registry v1.2.1 [INFO] [stderr] Checking socket2 v0.3.12 [INFO] [stderr] Checking time v0.1.43 [INFO] [stderr] Checking polling v0.1.5 [INFO] [stderr] Compiling openssl-sys v0.9.58 [INFO] [stderr] Checking mio v0.6.22 [INFO] [stderr] Checking rand_core v0.5.1 [INFO] [stderr] Checking async-io v0.1.11 [INFO] [stderr] Checking url v2.1.1 [INFO] [stderr] Checking rand_chacha v0.2.2 [INFO] [stderr] Checking ordered-float v1.1.0 [INFO] [stderr] Checking async-executor v0.1.2 [INFO] [stderr] Checking rand v0.7.3 [INFO] [stderr] Checking http-body v0.3.1 [INFO] [stderr] Compiling native-tls v0.2.4 [INFO] [stderr] Checking async-std v1.6.3 [INFO] [stderr] Compiling phf_generator v0.7.24 [INFO] [stderr] Checking mio-uds v0.6.8 [INFO] [stderr] Compiling phf_codegen v0.7.24 [INFO] [stderr] Compiling mime_guess v1.8.8 [INFO] [stderr] Checking tempfile v3.1.0 [INFO] [stderr] Checking multipart v0.16.1 [INFO] [stderr] Compiling tokio-macros v0.2.5 [INFO] [stderr] Compiling futures-macro v0.3.5 [INFO] [stderr] Compiling tracing-attributes v0.1.10 [INFO] [stderr] Compiling async-trait v0.1.37 [INFO] [stderr] Checking tokio v0.2.22 [INFO] [stderr] Checking tracing v0.1.19 [INFO] [stderr] Checking pin-project v0.4.23 [INFO] [stderr] Checking futures-util v0.3.5 [INFO] [stderr] Checking tracing-futures v0.2.4 [INFO] [stderr] Checking tokio-util v0.3.1 [INFO] [stderr] Checking tokio-tls v0.3.1 [INFO] [stderr] Checking h2 v0.2.6 [INFO] [stderr] Checking futures-executor v0.3.5 [INFO] [stderr] Checking combine v4.2.1 [INFO] [stderr] Checking futures v0.3.5 [INFO] [stderr] Checking serde-value v0.5.3 [INFO] [stderr] Checking chrono v0.4.15 [INFO] [stderr] Checking telegram-bot-raw v0.7.0 [INFO] [stderr] Checking hyper v0.13.7 [INFO] [stderr] Checking redis v0.17.0 [INFO] [stderr] Checking hyper-tls v0.4.3 [INFO] [stderr] Checking telegram-bot v0.7.0 [INFO] [stderr] Checking rustbotengine v0.2.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused import: `std::fmt` [INFO] [stdout] --> src/main.rs:2:5 [INFO] [stdout] | [INFO] [stdout] 2 | use std::fmt; [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused imports: `NaiveDateTime`, `NaiveDate` [INFO] [stdout] --> src/main.rs:3:34 [INFO] [stdout] | [INFO] [stdout] 3 | use chrono::{DateTime, TimeZone, NaiveDateTime,NaiveDate, Utc}; [INFO] [stdout] | ^^^^^^^^^^^^^ ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused imports: `Body`, `Method`, `Request` [INFO] [stdout] --> src/main.rs:10:13 [INFO] [stdout] | [INFO] [stdout] 10 | use hyper::{Body, Method, Request, Uri}; [INFO] [stdout] | ^^^^ ^^^^^^ ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused imports: `AsyncWriteExt as _`, `stdout` [INFO] [stdout] --> src/main.rs:13:17 [INFO] [stdout] | [INFO] [stdout] 13 | use tokio::io::{stdout, AsyncWriteExt as _}; [INFO] [stdout] | ^^^^^^ ^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variant `tele_err` should have an upper camel case name [INFO] [stdout] --> src/main.rs:19:5 [INFO] [stdout] | [INFO] [stdout] 19 | tele_err(telegram_bot::Error), [INFO] [stdout] | ^^^^^^^^ help: convert the identifier to upper camel case: `TeleErr` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(non_camel_case_types)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variant `redis_err` should have an upper camel case name [INFO] [stdout] --> src/main.rs:20:5 [INFO] [stdout] | [INFO] [stdout] 20 | redis_err(redis::RedisError), [INFO] [stdout] | ^^^^^^^^^ help: convert the identifier to upper camel case: `RedisErr` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variant `hyper_err` should have an upper camel case name [INFO] [stdout] --> src/main.rs:21:5 [INFO] [stdout] | [INFO] [stdout] 21 | hyper_err(hyper::Error), [INFO] [stdout] | ^^^^^^^^^ help: convert the identifier to upper camel case: `HyperErr` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variant `hyper_uri_err` should have an upper camel case name [INFO] [stdout] --> src/main.rs:22:5 [INFO] [stdout] | [INFO] [stdout] 22 | hyper_uri_err(hyper::http::uri::InvalidUri), [INFO] [stdout] | ^^^^^^^^^^^^^ help: convert the identifier to upper camel case: `HyperUriErr` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variant `serde_err` should have an upper camel case name [INFO] [stdout] --> src/main.rs:23:5 [INFO] [stdout] | [INFO] [stdout] 23 | serde_err(serde_json::Error), [INFO] [stdout] | ^^^^^^^^^ help: convert the identifier to upper camel case: `SerdeErr` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variant `chrono_err` should have an upper camel case name [INFO] [stdout] --> src/main.rs:24:5 [INFO] [stdout] | [INFO] [stdout] 24 | chrono_err(chrono::ParseError), [INFO] [stdout] | ^^^^^^^^^^ help: convert the identifier to upper camel case: `ChronoErr` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::fmt` [INFO] [stdout] --> src/main.rs:2:5 [INFO] [stdout] | [INFO] [stdout] 2 | use std::fmt; [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused imports: `NaiveDateTime`, `NaiveDate` [INFO] [stdout] --> src/main.rs:3:34 [INFO] [stdout] | [INFO] [stdout] 3 | use chrono::{DateTime, TimeZone, NaiveDateTime,NaiveDate, Utc}; [INFO] [stdout] | ^^^^^^^^^^^^^ ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused imports: `Body`, `Method`, `Request` [INFO] [stdout] --> src/main.rs:10:13 [INFO] [stdout] | [INFO] [stdout] 10 | use hyper::{Body, Method, Request, Uri}; [INFO] [stdout] | ^^^^ ^^^^^^ ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused imports: `AsyncWriteExt as _`, `stdout` [INFO] [stdout] --> src/main.rs:13:17 [INFO] [stdout] | [INFO] [stdout] 13 | use tokio::io::{stdout, AsyncWriteExt as _}; [INFO] [stdout] | ^^^^^^ ^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variant `tele_err` should have an upper camel case name [INFO] [stdout] --> src/main.rs:19:5 [INFO] [stdout] | [INFO] [stdout] 19 | tele_err(telegram_bot::Error), [INFO] [stdout] | ^^^^^^^^ help: convert the identifier to upper camel case: `TeleErr` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(non_camel_case_types)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variant `redis_err` should have an upper camel case name [INFO] [stdout] --> src/main.rs:20:5 [INFO] [stdout] | [INFO] [stdout] 20 | redis_err(redis::RedisError), [INFO] [stdout] | ^^^^^^^^^ help: convert the identifier to upper camel case: `RedisErr` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variant `hyper_err` should have an upper camel case name [INFO] [stdout] --> src/main.rs:21:5 [INFO] [stdout] | [INFO] [stdout] 21 | hyper_err(hyper::Error), [INFO] [stdout] | ^^^^^^^^^ help: convert the identifier to upper camel case: `HyperErr` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variant `hyper_uri_err` should have an upper camel case name [INFO] [stdout] --> src/main.rs:22:5 [INFO] [stdout] | [INFO] [stdout] 22 | hyper_uri_err(hyper::http::uri::InvalidUri), [INFO] [stdout] | ^^^^^^^^^^^^^ help: convert the identifier to upper camel case: `HyperUriErr` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variant `serde_err` should have an upper camel case name [INFO] [stdout] --> src/main.rs:23:5 [INFO] [stdout] | [INFO] [stdout] 23 | serde_err(serde_json::Error), [INFO] [stdout] | ^^^^^^^^^ help: convert the identifier to upper camel case: `SerdeErr` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variant `chrono_err` should have an upper camel case name [INFO] [stdout] --> src/main.rs:24:5 [INFO] [stdout] | [INFO] [stdout] 24 | chrono_err(chrono::ParseError), [INFO] [stdout] | ^^^^^^^^^^ help: convert the identifier to upper camel case: `ChronoErr` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `covid` [INFO] [stdout] --> src/main.rs:114:33 [INFO] [stdout] | [INFO] [stdout] 114 | ... let covid = CovidResponse::default(); [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_covid` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `covid` [INFO] [stdout] --> src/main.rs:114:33 [INFO] [stdout] | [INFO] [stdout] 114 | ... let covid = CovidResponse::default(); [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_covid` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/main.rs:119:45 [INFO] [stdout] | [INFO] [stdout] 119 | ... while let Some(mut body) = resp.body_mut().data().await { [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/main.rs:119:45 [INFO] [stdout] | [INFO] [stdout] 119 | ... while let Some(mut body) = resp.body_mut().data().await { [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: 12 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 12 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 2m 13s [INFO] running `Command { std: "docker" "inspect" "ac9a6fa3671c7ffd0f0e79eeeee530dd20bc89273a2f3fbc48478754c26c15ab", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "ac9a6fa3671c7ffd0f0e79eeeee530dd20bc89273a2f3fbc48478754c26c15ab", kill_on_drop: false }` [INFO] [stdout] ac9a6fa3671c7ffd0f0e79eeeee530dd20bc89273a2f3fbc48478754c26c15ab