[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#3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f for pr-87248
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSudhindra3000%2FBasic-Rust-Cli-App" "/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/Sudhindra3000/Basic-Rust-Cli-App on toolchain 3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "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-8/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" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded assert_cmd v1.0.5
[INFO] [stderr]   Downloaded predicates v1.0.8
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 24d4fd72053440bbf9fc00485a0b09b77c539c8afc4b07b7404a1cdc5785c924
[INFO] running `Command { std: "docker" "start" "-a" "24d4fd72053440bbf9fc00485a0b09b77c539c8afc4b07b7404a1cdc5785c924", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "24d4fd72053440bbf9fc00485a0b09b77c539c8afc4b07b7404a1cdc5785c924", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "24d4fd72053440bbf9fc00485a0b09b77c539c8afc4b07b7404a1cdc5785c924", kill_on_drop: false }`
[INFO] [stdout] 24d4fd72053440bbf9fc00485a0b09b77c539c8afc4b07b7404a1cdc5785c924
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 42ed327c55dbb5e21aa5f8b42453812d5cab0d4dd6f6016fbb9c2c1cc97cb2f9
[INFO] running `Command { std: "docker" "start" "-a" "42ed327c55dbb5e21aa5f8b42453812d5cab0d4dd6f6016fbb9c2c1cc97cb2f9", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.97
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling syn v1.0.73
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling bitflags v1.2.1
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[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling unicode-segmentation v1.7.1
[INFO] [stderr]    Compiling anyhow v1.0.41
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking termcolor v1.1.2
[INFO] [stderr]    Compiling doc-comment v0.3.3
[INFO] [stderr]     Checking ppv-lite86 v0.2.10
[INFO] [stderr]     Checking number_prefix v0.4.0
[INFO] [stderr]     Checking predicates-core v1.0.2
[INFO] [stderr]     Checking normalize-line-endings v0.3.0
[INFO] [stderr]     Checking treeline v0.1.0
[INFO] [stderr]     Checking regex-automata v0.1.10
[INFO] [stderr]     Checking difference v2.0.0
[INFO] [stderr]     Checking remove_dir_all v0.5.3
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]     Checking predicates-tree v1.0.2
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]     Checking aho-corasick v0.7.18
[INFO] [stderr]     Checking bstr v0.2.16
[INFO] [stderr]     Checking atty v0.2.14
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[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.4
[INFO] [stderr]     Checking float-cmp v0.8.0
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]     Checking tempfile v3.2.0
[INFO] [stderr]     Checking env_logger v0.8.4
[INFO] [stderr]     Checking indicatif v0.16.2
[INFO] [stderr]     Checking predicates v1.0.8
[INFO] [stderr]     Checking assert_cmd v1.0.5
[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: 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: 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 16.87s
[INFO] running `Command { std: "docker" "inspect" "42ed327c55dbb5e21aa5f8b42453812d5cab0d4dd6f6016fbb9c2c1cc97cb2f9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "42ed327c55dbb5e21aa5f8b42453812d5cab0d4dd6f6016fbb9c2c1cc97cb2f9", kill_on_drop: false }`
[INFO] [stdout] 42ed327c55dbb5e21aa5f8b42453812d5cab0d4dd6f6016fbb9c2c1cc97cb2f9