[INFO] cloning repository https://github.com/misssonder/calculator
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/misssonder/calculator" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmisssonder%2Fcalculator", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmisssonder%2Fcalculator'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4ba06f1cc633cdc5b819ef2446117ee3c54e9bb4
[INFO] testing misssonder/calculator against beta-2026-04-21 for beta-1.96-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmisssonder%2Fcalculator" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/misssonder/calculator
[INFO] finished tweaking git repo https://github.com/misssonder/calculator
[INFO] tweaked toml for git repo https://github.com/misssonder/calculator written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/misssonder/calculator on toolchain beta-2026-04-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/misssonder/calculator 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" "+beta-2026-04-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c1bbd7811888ae039e2f512d74c18c6bc96414daf1205143946e01539ccf1148
[INFO] running `Command { std: "docker" "start" "-a" "c1bbd7811888ae039e2f512d74c18c6bc96414daf1205143946e01539ccf1148", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c1bbd7811888ae039e2f512d74c18c6bc96414daf1205143946e01539ccf1148", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c1bbd7811888ae039e2f512d74c18c6bc96414daf1205143946e01539ccf1148", kill_on_drop: false }`
[INFO] [stdout] c1bbd7811888ae039e2f512d74c18c6bc96414daf1205143946e01539ccf1148
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c9a5e55e97c8984a5839b41d5af7e22f4a6c7efc4b4caadc08b4f1a2290f84f9
[INFO] running `Command { std: "docker" "start" "-a" "c9a5e55e97c8984a5839b41d5af7e22f4a6c7efc4b4caadc08b4f1a2290f84f9", kill_on_drop: false }`
[INFO] [stderr]    Compiling calculator-rs v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: method `augment` is never used
[INFO] [stdout]    --> src/parse.rs:107:8
[INFO] [stdout]     |
[INFO] [stdout] 103 | trait Operator: Sized {
[INFO] [stdout]     |       -------- method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 107 |     fn augment(self, parser: &mut Parser) -> Result<Self>;
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/lib.rs:50:23
[INFO] [stdout]    |
[INFO] [stdout] 50 |     pub fn new(input: &str) -> Calculator {
[INFO] [stdout]    |                       ^^^^     ^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                       |
[INFO] [stdout]    |                       the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 50 |     pub fn new(input: &str) -> Calculator<'_> {
[INFO] [stdout]    |                                          ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/lexer.rs:69:30
[INFO] [stdout]    |
[INFO] [stdout] 69 |     pub(crate) fn new(input: &str) -> Lexer {
[INFO] [stdout]    |                              ^^^^     ^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                              |
[INFO] [stdout]    |                              the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 69 |     pub(crate) fn new(input: &str) -> Lexer<'_> {
[INFO] [stdout]    |                                            ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/parse.rs:11:23
[INFO] [stdout]    |
[INFO] [stdout] 11 |     pub fn new(query: &str) -> Parser {
[INFO] [stdout]    |                       ^^^^     ^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                       |
[INFO] [stdout]    |                       the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 11 |     pub fn new(query: &str) -> Parser<'_> {
[INFO] [stdout]    |                                      ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.29s
[INFO] running `Command { std: "docker" "inspect" "c9a5e55e97c8984a5839b41d5af7e22f4a6c7efc4b4caadc08b4f1a2290f84f9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c9a5e55e97c8984a5839b41d5af7e22f4a6c7efc4b4caadc08b4f1a2290f84f9", kill_on_drop: false }`
[INFO] [stdout] c9a5e55e97c8984a5839b41d5af7e22f4a6c7efc4b4caadc08b4f1a2290f84f9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ba1e5ff2ab4b5cd993fc42be2393d326e201dbd1aea2053fcbf3a520dcf973c6
[INFO] running `Command { std: "docker" "start" "-a" "ba1e5ff2ab4b5cd993fc42be2393d326e201dbd1aea2053fcbf3a520dcf973c6", kill_on_drop: false }`
[INFO] [stdout] warning: method `augment` is never used
[INFO] [stdout]    --> src/parse.rs:107:8
[INFO] [stdout]     |
[INFO] [stdout] 103 | trait Operator: Sized {
[INFO] [stdout]     |       -------- method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 107 |     fn augment(self, parser: &mut Parser) -> Result<Self>;
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/lib.rs:50:23
[INFO] [stdout]    |
[INFO] [stdout] 50 |     pub fn new(input: &str) -> Calculator {
[INFO] [stdout]    |                       ^^^^     ^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                       |
[INFO] [stdout]    |                       the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 50 |     pub fn new(input: &str) -> Calculator<'_> {
[INFO] [stdout]    |                                          ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/lexer.rs:69:30
[INFO] [stdout]    |
[INFO] [stdout] 69 |     pub(crate) fn new(input: &str) -> Lexer {
[INFO] [stdout]    |                              ^^^^     ^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                              |
[INFO] [stdout]    |                              the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 69 |     pub(crate) fn new(input: &str) -> Lexer<'_> {
[INFO] [stdout]    |                                            ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/parse.rs:11:23
[INFO] [stdout]    |
[INFO] [stdout] 11 |     pub fn new(query: &str) -> Parser {
[INFO] [stdout]    |                       ^^^^     ^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                       |
[INFO] [stdout]    |                       the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 11 |     pub fn new(query: &str) -> Parser<'_> {
[INFO] [stdout]    |                                      ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling calculator-rs v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: method `augment` is never used
[INFO] [stdout]    --> src/parse.rs:107:8
[INFO] [stdout]     |
[INFO] [stdout] 103 | trait Operator: Sized {
[INFO] [stdout]     |       -------- method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 107 |     fn augment(self, parser: &mut Parser) -> Result<Self>;
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/lib.rs:50:23
[INFO] [stdout]    |
[INFO] [stdout] 50 |     pub fn new(input: &str) -> Calculator {
[INFO] [stdout]    |                       ^^^^     ^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                       |
[INFO] [stdout]    |                       the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 50 |     pub fn new(input: &str) -> Calculator<'_> {
[INFO] [stdout]    |                                          ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/lexer.rs:69:30
[INFO] [stdout]    |
[INFO] [stdout] 69 |     pub(crate) fn new(input: &str) -> Lexer {
[INFO] [stdout]    |                              ^^^^     ^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                              |
[INFO] [stdout]    |                              the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 69 |     pub(crate) fn new(input: &str) -> Lexer<'_> {
[INFO] [stdout]    |                                            ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/parse.rs:11:23
[INFO] [stdout]    |
[INFO] [stdout] 11 |     pub fn new(query: &str) -> Parser {
[INFO] [stdout]    |                       ^^^^     ^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                       |
[INFO] [stdout]    |                       the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 11 |     pub fn new(query: &str) -> Parser<'_> {
[INFO] [stdout]    |                                      ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.58s
[INFO] running `Command { std: "docker" "inspect" "ba1e5ff2ab4b5cd993fc42be2393d326e201dbd1aea2053fcbf3a520dcf973c6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ba1e5ff2ab4b5cd993fc42be2393d326e201dbd1aea2053fcbf3a520dcf973c6", kill_on_drop: false }`
[INFO] [stdout] ba1e5ff2ab4b5cd993fc42be2393d326e201dbd1aea2053fcbf3a520dcf973c6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 0d4b952b8490b379bc3509f578ec05242a41af41738b31cf90f3f7a4f0ca167c
[INFO] running `Command { std: "docker" "start" "-a" "0d4b952b8490b379bc3509f578ec05242a41af41738b31cf90f3f7a4f0ca167c", kill_on_drop: false }`
[INFO] [stderr] warning: method `augment` is never used
[INFO] [stderr]    --> src/parse.rs:107:8
[INFO] [stderr]     |
[INFO] [stderr] 103 | trait Operator: Sized {
[INFO] [stderr]     |       -------- method in this trait
[INFO] [stderr] ...
[INFO] [stderr] 107 |     fn augment(self, parser: &mut Parser) -> Result<Self>;
[INFO] [stderr]     |        ^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]   --> src/lib.rs:50:23
[INFO] [stderr]    |
[INFO] [stderr] 50 |     pub fn new(input: &str) -> Calculator {
[INFO] [stderr]    |                       ^^^^     ^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stderr]    |                       |
[INFO] [stderr]    |                       the lifetime is elided here
[INFO] [stderr]    |
[INFO] [stderr]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stderr]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stderr] help: use `'_` for type paths
[INFO] [stderr]    |
[INFO] [stderr] 50 |     pub fn new(input: &str) -> Calculator<'_> {
[INFO] [stderr]    |                                          ++++
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]   --> src/lexer.rs:69:30
[INFO] [stderr]    |
[INFO] [stderr] 69 |     pub(crate) fn new(input: &str) -> Lexer {
[INFO] [stderr]    |                              ^^^^     ^^^^^ the same lifetime is hidden here
[INFO] [stderr]    |                              |
[INFO] [stderr]    |                              the lifetime is elided here
[INFO] [stderr]    |
[INFO] [stderr]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stderr] help: use `'_` for type paths
[INFO] [stderr]    |
[INFO] [stderr] 69 |     pub(crate) fn new(input: &str) -> Lexer<'_> {
[INFO] [stderr]    |                                            ++++
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]   --> src/parse.rs:11:23
[INFO] [stderr]    |
[INFO] [stderr] 11 |     pub fn new(query: &str) -> Parser {
[INFO] [stderr]    |                       ^^^^     ^^^^^^ the same lifetime is hidden here
[INFO] [stderr]    |                       |
[INFO] [stderr]    |                       the lifetime is elided here
[INFO] [stderr]    |
[INFO] [stderr]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stderr] help: use `'_` for type paths
[INFO] [stderr]    |
[INFO] [stderr] 11 |     pub fn new(query: &str) -> Parser<'_> {
[INFO] [stderr]    |                                      ++++
[INFO] [stderr] 
[INFO] [stderr] warning: `calculator-rs` (lib) generated 4 warnings (run `cargo fix --lib -p calculator-rs` to apply 3 suggestions)
[INFO] [stderr] warning: `calculator-rs` (lib test) generated 4 warnings (4 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/calculator_rs-893feefdb491e952)
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test lexer::tests::test_lexer ... ok
[INFO] [stdout] test tests::test_calculate ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests calculator_rs
[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" "0d4b952b8490b379bc3509f578ec05242a41af41738b31cf90f3f7a4f0ca167c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0d4b952b8490b379bc3509f578ec05242a41af41738b31cf90f3f7a4f0ca167c", kill_on_drop: false }`
[INFO] [stdout] 0d4b952b8490b379bc3509f578ec05242a41af41738b31cf90f3f7a4f0ca167c
