[INFO] cloning repository https://github.com/Sudhindra3000/Basic-Rust-Cli-App
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Sudhindra3000/Basic-Rust-Cli-App" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSudhindra3000%2FBasic-Rust-Cli-App", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSudhindra3000%2FBasic-Rust-Cli-App'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0a915ffbc34d12eb8e6c54fb7522b2406a9e0b4c
[INFO] checking Sudhindra3000/Basic-Rust-Cli-App against try#3d9fdbff4f377de96b3a51174e7a64086bee9a5c for pr-81477
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSudhindra3000%2FBasic-Rust-Cli-App" "/workspace/builds/worker-14/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Sudhindra3000/Basic-Rust-Cli-App on toolchain 3d9fdbff4f377de96b3a51174e7a64086bee9a5c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Sudhindra3000/Basic-Rust-Cli-App
[INFO] finished tweaking git repo https://github.com/Sudhindra3000/Basic-Rust-Cli-App
[INFO] tweaked toml for git repo https://github.com/Sudhindra3000/Basic-Rust-Cli-App written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate git repo https://github.com/Sudhindra3000/Basic-Rust-Cli-App already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded predicates-core v1.0.2
[INFO] [stderr]   Downloaded terminal_size v0.1.17
[INFO] [stderr]   Downloaded predicates-tree v1.0.2
[INFO] [stderr]   Downloaded assert_cmd v1.0.5
[INFO] [stderr]   Downloaded env_logger v0.8.4
[INFO] [stderr]   Downloaded number_prefix v0.4.0
[INFO] [stderr]   Downloaded indicatif v0.16.2
[INFO] [stderr]   Downloaded predicates v1.0.8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "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] 90d11c814ad112216ac8d7d371b3f645551a801b03447d24f269e86cd3e2b6f4
[INFO] running `Command { std: "docker" "start" "-a" "90d11c814ad112216ac8d7d371b3f645551a801b03447d24f269e86cd3e2b6f4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "90d11c814ad112216ac8d7d371b3f645551a801b03447d24f269e86cd3e2b6f4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "90d11c814ad112216ac8d7d371b3f645551a801b03447d24f269e86cd3e2b6f4", kill_on_drop: false }`
[INFO] [stdout] 90d11c814ad112216ac8d7d371b3f645551a801b03447d24f269e86cd3e2b6f4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4af1b546ac106569588d5d8d27301121b1fc2e9f4f9f9ce3be51bd8b450200c2
[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" "4af1b546ac106569588d5d8d27301121b1fc2e9f4f9f9ce3be51bd8b450200c2", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.97
[INFO] [stderr]    Compiling syn v1.0.73
[INFO] [stderr]    Compiling anyhow v1.0.41
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]    Compiling doc-comment v0.3.3
[INFO] [stderr]     Checking regex-automata v0.1.10
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]     Checking predicates-tree v1.0.2
[INFO] [stderr]     Checking log v0.4.14
[INFO] [stderr]     Checking bstr v0.2.16
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking terminal_size v0.1.17
[INFO] [stderr]     Checking getrandom v0.2.3
[INFO] [stderr]     Checking wait-timeout v0.2.0
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking env_logger v0.8.4
[INFO] [stderr]     Checking float-cmp v0.8.0
[INFO] [stderr]     Checking console v0.14.1
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking predicates v1.0.8
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking indicatif v0.16.2
[INFO] [stderr]     Checking rand v0.8.4
[INFO] [stderr]     Checking assert_cmd v1.0.5
[INFO] [stderr]     Checking tempfile v3.2.0
[INFO] [stderr]    Compiling structopt-derive v0.4.14
[INFO] [stderr]     Checking structopt v0.3.21
[INFO] [stderr]     Checking grrs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]  --> src/lib.rs:6:13
[INFO] [stdout]   |
[INFO] [stdout] 6 |             writeln!(writer, "{}", line);
[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]   = note: this warning originates in the macro `writeln` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]  --> src/lib.rs:6:13
[INFO] [stdout]   |
[INFO] [stdout] 6 |             writeln!(writer, "{}", line);
[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]   = note: this warning originates in the macro `writeln` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Write`
[INFO] [stdout]  --> src/main.rs:2:23
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::io::{stdout, Write};
[INFO] [stdout]   |                       ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `BufWriter`, `stdout`
[INFO] [stdout]  --> src/output_for_humans_and_machines.rs:1:15
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::io::{BufWriter, stdout};
[INFO] [stdout]   |               ^^^^^^^^^  ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Write`
[INFO] [stdout]  --> src/main.rs:2:23
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::io::{stdout, Write};
[INFO] [stdout]   |                       ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `BufWriter`, `stdout`
[INFO] [stdout]  --> src/output_for_humans_and_machines.rs:1:15
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::io::{BufWriter, stdout};
[INFO] [stdout]   |               ^^^^^^^^^  ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `run`
[INFO] [stdout]  --> src/output_for_humans_and_machines.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn run() {
[INFO] [stdout]   |        ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `printing_errors`
[INFO] [stdout]   --> src/output_for_humans_and_machines.rs:11:4
[INFO] [stdout]    |
[INFO] [stdout] 11 | fn printing_errors() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `improve_printing_performance`
[INFO] [stdout]   --> src/output_for_humans_and_machines.rs:17:4
[INFO] [stdout]    |
[INFO] [stdout] 17 | fn improve_printing_performance() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `progress_bar`
[INFO] [stdout]   --> src/output_for_humans_and_machines.rs:24:4
[INFO] [stdout]    |
[INFO] [stdout] 24 | fn progress_bar() {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `logging`
[INFO] [stdout]   --> src/output_for_humans_and_machines.rs:37:4
[INFO] [stdout]    |
[INFO] [stdout] 37 | fn logging() {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `run`
[INFO] [stdout]  --> src/output_for_humans_and_machines.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn run() {
[INFO] [stdout]   |        ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `printing_errors`
[INFO] [stdout]   --> src/output_for_humans_and_machines.rs:11:4
[INFO] [stdout]    |
[INFO] [stdout] 11 | fn printing_errors() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `improve_printing_performance`
[INFO] [stdout]   --> src/output_for_humans_and_machines.rs:17:4
[INFO] [stdout]    |
[INFO] [stdout] 17 | fn improve_printing_performance() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `progress_bar`
[INFO] [stdout]   --> src/output_for_humans_and_machines.rs:24:4
[INFO] [stdout]    |
[INFO] [stdout] 24 | fn progress_bar() {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `logging`
[INFO] [stdout]   --> src/output_for_humans_and_machines.rs:37:4
[INFO] [stdout]    |
[INFO] [stdout] 37 | fn logging() {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 39.44s
[INFO] running `Command { std: "docker" "inspect" "4af1b546ac106569588d5d8d27301121b1fc2e9f4f9f9ce3be51bd8b450200c2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4af1b546ac106569588d5d8d27301121b1fc2e9f4f9f9ce3be51bd8b450200c2", kill_on_drop: false }`
[INFO] [stdout] 4af1b546ac106569588d5d8d27301121b1fc2e9f4f9f9ce3be51bd8b450200c2