[INFO] cloning repository https://github.com/appetrosyan/altman_interview_solution
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/appetrosyan/altman_interview_solution" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fappetrosyan%2Faltman_interview_solution", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fappetrosyan%2Faltman_interview_solution'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0e4b1b1e25246bba2dd36e207ce98b7d632ab18f
[INFO] checking appetrosyan/altman_interview_solution against master#936f2600b6c903b04387f74ed5cbce88bb06d243 for pr-91141
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fappetrosyan%2Faltman_interview_solution" "/workspace/builds/worker-114/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-114/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/appetrosyan/altman_interview_solution on toolchain 936f2600b6c903b04387f74ed5cbce88bb06d243
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/appetrosyan/altman_interview_solution
[INFO] finished tweaking git repo https://github.com/appetrosyan/altman_interview_solution
[INFO] tweaked toml for git repo https://github.com/appetrosyan/altman_interview_solution written to /workspace/builds/worker-114/source/Cargo.toml
[INFO] crate git repo https://github.com/appetrosyan/altman_interview_solution already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-114/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-114/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 36303d9ceacff7d26efcd18ad318944e9db06930ac55dacbb6df39cc77e3b39c
[INFO] running `Command { std: "docker" "start" "-a" "36303d9ceacff7d26efcd18ad318944e9db06930ac55dacbb6df39cc77e3b39c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "36303d9ceacff7d26efcd18ad318944e9db06930ac55dacbb6df39cc77e3b39c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "36303d9ceacff7d26efcd18ad318944e9db06930ac55dacbb6df39cc77e3b39c", kill_on_drop: false }`
[INFO] [stdout] 36303d9ceacff7d26efcd18ad318944e9db06930ac55dacbb6df39cc77e3b39c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-114/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-114/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ff658d8101f3141479de00770cb5ee41da2d86943da976811202ad5a92cefc38
[INFO] running `Command { std: "docker" "start" "-a" "ff658d8101f3141479de00770cb5ee41da2d86943da976811202ad5a92cefc38", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling libc v0.2.101
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling cc v1.0.70
[INFO] [stderr]    Compiling pkg-config v0.3.19
[INFO] [stderr]     Checking pin-project-lite v0.2.7
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[INFO] [stderr]    Compiling futures-core v0.3.17
[INFO] [stderr]     Checking itoa v0.4.8
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[INFO] [stderr]     Checking fnv v1.0.7
[INFO] [stderr]    Compiling openssl v0.10.36
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling futures-channel v0.3.17
[INFO] [stderr]     Checking futures-sink v0.3.17
[INFO] [stderr]     Checking pin-utils v0.1.0
[INFO] [stderr]     Checking tinyvec_macros v0.1.0
[INFO] [stderr]     Checking matches v0.1.9
[INFO] [stderr]     Checking futures-io v0.3.17
[INFO] [stderr]     Checking hashbrown v0.11.2
[INFO] [stderr]    Compiling httparse v1.5.1
[INFO] [stderr]    Compiling native-tls v0.2.8
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[INFO] [stderr]    Compiling serde v1.0.130
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[INFO] [stderr]     Checking httpdate v1.0.1
[INFO] [stderr]     Checking unicode-bidi v0.3.6
[INFO] [stderr]    Compiling encoding_rs v0.8.28
[INFO] [stderr]     Checking tower-service v0.3.1
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[INFO] [stderr]     Checking tinyvec v1.3.1
[INFO] [stderr]     Checking form_urlencoded v1.0.1
[INFO] [stderr]    Compiling tokio v1.11.0
[INFO] [stderr]    Compiling futures-util v0.3.17
[INFO] [stderr]    Compiling indexmap v1.7.0
[INFO] [stderr]     Checking http v0.2.4
[INFO] [stderr]    Compiling openssl-sys v0.9.66
[INFO] [stderr]     Checking tracing v0.1.26
[INFO] [stderr]     Checking unicode-normalization v0.1.19
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[INFO] [stderr]     Checking mio v0.7.13
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[INFO] [stderr]     Checking http-body v0.4.3
[INFO] [stderr]     Checking idna v0.2.3
[INFO] [stderr]     Checking url v2.2.2
[INFO] [stderr]     Checking serde_urlencoded v0.7.0
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[INFO] [stderr]     Checking reqwest v0.11.4
[INFO] [stderr]     Checking untitled_altman v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::io::Read`
[INFO] [stdout]  --> src/main.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::io::Read;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Read`
[INFO] [stdout]  --> src/main.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::io::Read;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/main.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let mut res = reqwest::blocking::get(url)?;
[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:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let mut res = reqwest::blocking::get(url)?;
[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: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:37:13
[INFO] [stdout]    |
[INFO] [stdout] 37 |             ping(interval, url.to_string());
[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: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:37:13
[INFO] [stdout]    |
[INFO] [stdout] 37 |             ping(interval, url.to_string());
[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: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2m 46s
[INFO] running `Command { std: "docker" "inspect" "ff658d8101f3141479de00770cb5ee41da2d86943da976811202ad5a92cefc38", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ff658d8101f3141479de00770cb5ee41da2d86943da976811202ad5a92cefc38", kill_on_drop: false }`
[INFO] [stdout] ff658d8101f3141479de00770cb5ee41da2d86943da976811202ad5a92cefc38