[INFO] cloning repository https://github.com/itanor/exercises-for-programmers-57-challenges
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/itanor/exercises-for-programmers-57-challenges" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fitanor%2Fexercises-for-programmers-57-challenges", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fitanor%2Fexercises-for-programmers-57-challenges'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7b33f1251b0290b2c80b02cc0124bdfadc38ec8a
[INFO] testing itanor/exercises-for-programmers-57-challenges against master#ebf0cf75d368c035f4c7e7246d203bd469ee4a51 for pr-137940
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fitanor%2Fexercises-for-programmers-57-challenges" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/itanor/exercises-for-programmers-57-challenges on toolchain ebf0cf75d368c035f4c7e7246d203bd469ee4a51
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ebf0cf75d368c035f4c7e7246d203bd469ee4a51" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/itanor/exercises-for-programmers-57-challenges
[INFO] finished tweaking git repo https://github.com/itanor/exercises-for-programmers-57-challenges
[INFO] tweaked toml for git repo https://github.com/itanor/exercises-for-programmers-57-challenges written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/itanor/exercises-for-programmers-57-challenges already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ebf0cf75d368c035f4c7e7246d203bd469ee4a51" "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-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+ebf0cf75d368c035f4c7e7246d203bd469ee4a51" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3c446b8e3410cde0137810c968c0bdd86f43c2fe987c8545a9c5a0264b395d40
[INFO] running `Command { std: "docker" "start" "-a" "3c446b8e3410cde0137810c968c0bdd86f43c2fe987c8545a9c5a0264b395d40", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3c446b8e3410cde0137810c968c0bdd86f43c2fe987c8545a9c5a0264b395d40", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3c446b8e3410cde0137810c968c0bdd86f43c2fe987c8545a9c5a0264b395d40", kill_on_drop: false }`
[INFO] [stdout] 3c446b8e3410cde0137810c968c0bdd86f43c2fe987c8545a9c5a0264b395d40
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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" "RUSTDOCFLAGS=--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@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+ebf0cf75d368c035f4c7e7246d203bd469ee4a51" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 29efa43de385a6c076c5f63ed2f1e187bc8eb56e5318c3eff2a49baecfd596a9
[INFO] running `Command { std: "docker" "start" "-a" "29efa43de385a6c076c5f63ed2f1e187bc8eb56e5318c3eff2a49baecfd596a9", kill_on_drop: false }`
[INFO] [stderr]    Compiling exercises-for-programmers-57-challenges v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `what_is_the_input` is never used
[INFO] [stdout]  --> src/chars/characters.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn what_is_the_input() { 
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `count_characters` is never used
[INFO] [stdout]   --> src/chars/characters.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub fn count_characters(input: &str) -> usize {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `outputs_the_input` is never used
[INFO] [stdout]   --> src/chars/characters.rs:23:8
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub fn outputs_the_input(input: &str, total: usize) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_while_input_has_more_than_zero_chars` is never used
[INFO] [stdout]   --> src/chars/characters.rs:31:8
[INFO] [stdout]    |
[INFO] [stdout] 31 | pub fn read_while_input_has_more_than_zero_chars() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.36s
[INFO] running `Command { std: "docker" "inspect" "29efa43de385a6c076c5f63ed2f1e187bc8eb56e5318c3eff2a49baecfd596a9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "29efa43de385a6c076c5f63ed2f1e187bc8eb56e5318c3eff2a49baecfd596a9", kill_on_drop: false }`
[INFO] [stdout] 29efa43de385a6c076c5f63ed2f1e187bc8eb56e5318c3eff2a49baecfd596a9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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" "RUSTDOCFLAGS=--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@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+ebf0cf75d368c035f4c7e7246d203bd469ee4a51" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b2455343ac0d48023b96ff2b914e6d478d550c10b38417d0c8d090ed35bb5431
[INFO] running `Command { std: "docker" "start" "-a" "b2455343ac0d48023b96ff2b914e6d478d550c10b38417d0c8d090ed35bb5431", kill_on_drop: false }`
[INFO] [stderr]    Compiling exercises-for-programmers-57-challenges v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `what_is_the_input` is never used
[INFO] [stdout]  --> src/chars/characters.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn what_is_the_input() { 
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `count_characters` is never used
[INFO] [stdout]   --> src/chars/characters.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub fn count_characters(input: &str) -> usize {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `outputs_the_input` is never used
[INFO] [stdout]   --> src/chars/characters.rs:23:8
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub fn outputs_the_input(input: &str, total: usize) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_while_input_has_more_than_zero_chars` is never used
[INFO] [stdout]   --> src/chars/characters.rs:31:8
[INFO] [stdout]    |
[INFO] [stdout] 31 | pub fn read_while_input_has_more_than_zero_chars() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.24s
[INFO] running `Command { std: "docker" "inspect" "b2455343ac0d48023b96ff2b914e6d478d550c10b38417d0c8d090ed35bb5431", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b2455343ac0d48023b96ff2b914e6d478d550c10b38417d0c8d090ed35bb5431", kill_on_drop: false }`
[INFO] [stdout] b2455343ac0d48023b96ff2b914e6d478d550c10b38417d0c8d090ed35bb5431
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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" "RUSTDOCFLAGS=--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@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+ebf0cf75d368c035f4c7e7246d203bd469ee4a51" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 3b0982893ff66ea4e0d34fa59f10f04dd93e23d6b88d45c729a36cdc4947e35f
[INFO] running `Command { std: "docker" "start" "-a" "3b0982893ff66ea4e0d34fa59f10f04dd93e23d6b88d45c729a36cdc4947e35f", kill_on_drop: false }`
[INFO] [stderr] warning: function `what_is_the_input` is never used
[INFO] [stderr]  --> src/chars/characters.rs:3:8
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub fn what_is_the_input() { 
[INFO] [stderr]   |        ^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function `count_characters` is never used
[INFO] [stderr]   --> src/chars/characters.rs:19:8
[INFO] [stderr]    |
[INFO] [stderr] 19 | pub fn count_characters(input: &str) -> usize {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `outputs_the_input` is never used
[INFO] [stderr]   --> src/chars/characters.rs:23:8
[INFO] [stderr]    |
[INFO] [stderr] 23 | pub fn outputs_the_input(input: &str, total: usize) {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `read_while_input_has_more_than_zero_chars` is never used
[INFO] [stderr]   --> src/chars/characters.rs:31:8
[INFO] [stderr]    |
[INFO] [stderr] 31 | pub fn read_while_input_has_more_than_zero_chars() {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `exercises-for-programmers-57-challenges` (bin "exercises-for-programmers-57-challenges" test) generated 4 warnings
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/exercises_for_programmers_57_challenges-19aec3fa09a12803)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "3b0982893ff66ea4e0d34fa59f10f04dd93e23d6b88d45c729a36cdc4947e35f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3b0982893ff66ea4e0d34fa59f10f04dd93e23d6b88d45c729a36cdc4947e35f", kill_on_drop: false }`
[INFO] [stdout] 3b0982893ff66ea4e0d34fa59f10f04dd93e23d6b88d45c729a36cdc4947e35f