[INFO] cloning repository https://github.com/qalens/kata-stringcalculator
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/qalens/kata-stringcalculator" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fqalens%2Fkata-stringcalculator", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fqalens%2Fkata-stringcalculator'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7c8c06e08a003ed4ed6a2c3eda4a44640c5ff206
[INFO] testing qalens/kata-stringcalculator against master#62efba8a050c64249dab942951bb28f710208bc8 for pr-90799
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fqalens%2Fkata-stringcalculator" "/workspace/builds/worker-28/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-28/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/qalens/kata-stringcalculator on toolchain 62efba8a050c64249dab942951bb28f710208bc8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/qalens/kata-stringcalculator
[INFO] finished tweaking git repo https://github.com/qalens/kata-stringcalculator
[INFO] tweaked toml for git repo https://github.com/qalens/kata-stringcalculator written to /workspace/builds/worker-28/source/Cargo.toml
[INFO] crate git repo https://github.com/qalens/kata-stringcalculator already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "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-28/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e6ed97c567cd7defd623c915616bdb8403796458350211766cd476f2adb34930
[INFO] running `Command { std: "docker" "start" "-a" "e6ed97c567cd7defd623c915616bdb8403796458350211766cd476f2adb34930", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e6ed97c567cd7defd623c915616bdb8403796458350211766cd476f2adb34930", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e6ed97c567cd7defd623c915616bdb8403796458350211766cd476f2adb34930", kill_on_drop: false }`
[INFO] [stdout] e6ed97c567cd7defd623c915616bdb8403796458350211766cd476f2adb34930
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d1f9d1c35ece9c9375d28c295376277d4079b80121d073b1d0c92bf0c60861a1
[INFO] running `Command { std: "docker" "start" "-a" "d1f9d1c35ece9c9375d28c295376277d4079b80121d073b1d0c92bf0c60861a1", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling stringcalculator v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]   --> src/stringcalc.rs:11:11
[INFO] [stdout]    |
[INFO] [stdout] 11 |         if(line.starts_with("//") && index == 0){
[INFO] [stdout]    |           ^                                    ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 11 -         if(line.starts_with("//") && index == 0){
[INFO] [stdout] 11 +         if line.starts_with("//") && index == 0 {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]   --> src/stringcalc.rs:26:15
[INFO] [stdout]    |
[INFO] [stdout] 26 |             if(val.starts_with('-')){
[INFO] [stdout]    |               ^                    ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 26 -             if(val.starts_with('-')){
[INFO] [stdout] 26 +             if val.starts_with('-') {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]   --> src/stringcalc.rs:36:7
[INFO] [stdout]    |
[INFO] [stdout] 36 |     if(!negatives.is_empty()){
[INFO] [stdout]    |       ^                     ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 36 -     if(!negatives.is_empty()){
[INFO] [stdout] 36 +     if !negatives.is_empty() {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/stringcalc.rs:3:9
[INFO] [stdout]   |
[INFO] [stdout] 3 |     let mut x = numbers.clone();
[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/stringcalc.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let mut split=x.split('\n');
[INFO] [stdout]   |         ----^^^^^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `add`
[INFO] [stdout]  --> src/stringcalc.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn add(numbers: & str) -> usize{
[INFO] [stdout]   |        ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/stringcalc.rs:37:16
[INFO] [stdout]    |
[INFO] [stdout] 37 |         panic!(format!("negatives not allowed {0}",negatives.join(" ")));
[INFO] [stdout]    |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stdout]    = note: this usage of panic!() is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout]    = note: the panic!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]    |
[INFO] [stdout] 37 -         panic!(format!("negatives not allowed {0}",negatives.join(" ")));
[INFO] [stdout] 37 +         panic!("negatives not allowed {0}",negatives.join(" "));
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.30s
[INFO] running `Command { std: "docker" "inspect" "d1f9d1c35ece9c9375d28c295376277d4079b80121d073b1d0c92bf0c60861a1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d1f9d1c35ece9c9375d28c295376277d4079b80121d073b1d0c92bf0c60861a1", kill_on_drop: false }`
[INFO] [stdout] d1f9d1c35ece9c9375d28c295376277d4079b80121d073b1d0c92bf0c60861a1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] aab354ab702cfb2d92b3f40c45b1d80b7a9af55fa759538c997a45a6bdde82e9
[INFO] running `Command { std: "docker" "start" "-a" "aab354ab702cfb2d92b3f40c45b1d80b7a9af55fa759538c997a45a6bdde82e9", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling stringcalculator v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]   --> src/stringcalc.rs:11:11
[INFO] [stdout]    |
[INFO] [stdout] 11 |         if(line.starts_with("//") && index == 0){
[INFO] [stdout]    |           ^                                    ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 11 -         if(line.starts_with("//") && index == 0){
[INFO] [stdout] 11 +         if line.starts_with("//") && index == 0 {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]   --> src/stringcalc.rs:26:15
[INFO] [stdout]    |
[INFO] [stdout] 26 |             if(val.starts_with('-')){
[INFO] [stdout]    |               ^                    ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 26 -             if(val.starts_with('-')){
[INFO] [stdout] 26 +             if val.starts_with('-') {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]   --> src/stringcalc.rs:36:7
[INFO] [stdout]    |
[INFO] [stdout] 36 |     if(!negatives.is_empty()){
[INFO] [stdout]    |       ^                     ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 36 -     if(!negatives.is_empty()){
[INFO] [stdout] 36 +     if !negatives.is_empty() {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/stringcalc.rs:3:9
[INFO] [stdout]   |
[INFO] [stdout] 3 |     let mut x = numbers.clone();
[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/stringcalc.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let mut split=x.split('\n');
[INFO] [stdout]   |         ----^^^^^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/stringcalc.rs:37:16
[INFO] [stdout]    |
[INFO] [stdout] 37 |         panic!(format!("negatives not allowed {0}",negatives.join(" ")));
[INFO] [stdout]    |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stdout]    = note: this usage of panic!() is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout]    = note: the panic!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]    |
[INFO] [stdout] 37 -         panic!(format!("negatives not allowed {0}",negatives.join(" ")));
[INFO] [stdout] 37 +         panic!("negatives not allowed {0}",negatives.join(" "));
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.66s
[INFO] running `Command { std: "docker" "inspect" "aab354ab702cfb2d92b3f40c45b1d80b7a9af55fa759538c997a45a6bdde82e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aab354ab702cfb2d92b3f40c45b1d80b7a9af55fa759538c997a45a6bdde82e9", kill_on_drop: false }`
[INFO] [stdout] aab354ab702cfb2d92b3f40c45b1d80b7a9af55fa759538c997a45a6bdde82e9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 84e43b451f113efcee428d2b582e494dbe1f5ccad16ab9b8ae39651a55953a7f
[INFO] running `Command { std: "docker" "start" "-a" "84e43b451f113efcee428d2b582e494dbe1f5ccad16ab9b8ae39651a55953a7f", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr] warning: unnecessary parentheses around `if` condition
[INFO] [stdout] running 11 tests
[INFO] [stderr]   --> src/stringcalc.rs:11:11
[INFO] [stdout] test stringcalc::tests::should_add_two_numbers ... ok
[INFO] [stderr]    |
[INFO] [stdout] test stringcalc::tests::should_ignore_number_bigger_than_1000 ... ok
[INFO] [stderr] 11 |         if(line.starts_with("//") && index == 0){
[INFO] [stdout] test stringcalc::tests::should_return_for_4_numbers ... ok
[INFO] [stderr]    |           ^                                    ^
[INFO] [stdout] test stringcalc::tests::should_return_same_number_if_single ... ok
[INFO] [stderr]    |
[INFO] [stdout] test stringcalc::tests::should_support_dynamic_delimiter ... ok
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] test stringcalc::tests::should_support_multiple_delimiter ... ok
[INFO] [stderr] help: remove these parentheses
[INFO] [stdout] test stringcalc::tests::should_support_multiple_delimiter_with_length_longer_than_one ... ok
[INFO] [stderr]    |
[INFO] [stdout] test stringcalc::tests::should_return_sum_when_new_line_present ... ok
[INFO] [stderr] 11 -         if(line.starts_with("//") && index == 0){
[INFO] [stdout] test stringcalc::tests::should_return_0_when_empty ... ok
[INFO] [stderr] 11 +         if line.starts_with("//") && index == 0 {
[INFO] [stderr]    | 
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `if` condition
[INFO] [stderr]   --> src/stringcalc.rs:26:15
[INFO] [stderr]    |
[INFO] [stderr] 26 |             if(val.starts_with('-')){
[INFO] [stderr]    |               ^                    ^
[INFO] [stderr]    |
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr] 26 -             if(val.starts_with('-')){
[INFO] [stderr] 26 +             if val.starts_with('-') {
[INFO] [stderr]    | 
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `if` condition
[INFO] [stderr]   --> src/stringcalc.rs:36:7
[INFO] [stderr]    |
[INFO] [stderr] 36 |     if(!negatives.is_empty()){
[INFO] [stderr]    |       ^                     ^
[INFO] [stderr]    |
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr] 36 -     if(!negatives.is_empty()){
[INFO] [stderr] 36 +     if !negatives.is_empty() {
[INFO] [stderr]    | 
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]  --> src/stringcalc.rs:3:9
[INFO] [stderr]   |
[INFO] [stderr] 3 |     let mut x = numbers.clone();
[INFO] [stderr]   |         ----^
[INFO] [stderr]   |         |
[INFO] [stderr]   |         help: remove this `mut`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]  --> src/stringcalc.rs:5:9
[INFO] [stderr]   |
[INFO] [stderr] 5 |     let mut split=x.split('\n');
[INFO] [stderr]   |         ----^^^^^
[INFO] [stderr]   |         |
[INFO] [stderr]   |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: panic message is not a string literal
[INFO] [stderr]   --> src/stringcalc.rs:37:16
[INFO] [stderr]    |
[INFO] [stderr] 37 |         panic!(format!("negatives not allowed {0}",negatives.join(" ")));
[INFO] [stderr]    |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stderr]    = note: this usage of panic!() is deprecated; it will be a hard error in Rust 2021
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stderr]    = note: the panic!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stderr] help: remove the `format!(..)` macro call
[INFO] [stderr]    |
[INFO] [stderr] 37 -         panic!(format!("negatives not allowed {0}",negatives.join(" ")));
[INFO] [stderr] 37 +         panic!("negatives not allowed {0}",negatives.join(" "));
[INFO] [stderr]    | 
[INFO] [stderr] 
[INFO] [stderr] warning: `stringcalculator` (bin "stringcalculator" test) generated 6 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.12s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/stringcalculator-1db6a2662d6420f3)
[INFO] [stdout] test stringcalc::tests::should_support_delimiter_of_any_length ... ok
[INFO] [stdout] test stringcalc::tests::should_throw_exception_when_negative_numbers_are_present - should panic ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 11 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.03s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "84e43b451f113efcee428d2b582e494dbe1f5ccad16ab9b8ae39651a55953a7f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "84e43b451f113efcee428d2b582e494dbe1f5ccad16ab9b8ae39651a55953a7f", kill_on_drop: false }`
[INFO] [stdout] 84e43b451f113efcee428d2b582e494dbe1f5ccad16ab9b8ae39651a55953a7f