[INFO] updating cached repository https://github.com/gcrubikloud/calculator-rs
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 202aa6943f24f099656635a1641dabfd2271a5a3
[INFO] testing gcrubikloud/calculator-rs against 1.38.0 for beta-1.39-1
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgcrubikloud%2Fcalculator-rs" "work/builds/worker-6/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/gcrubikloud/calculator-rs on toolchain 1.38.0
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/gcrubikloud/calculator-rs
[INFO] finished tweaking git repo https://github.com/gcrubikloud/calculator-rs
[INFO] tweaked toml for git repo https://github.com/gcrubikloud/calculator-rs written to work/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/gcrubikloud/calculator-rs already has a lockfile, it will not be regenerated
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-6/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.38.0" "build" "--frozen"`
[INFO] [stdout] 8c26c3713939a7e5505f17322641b9aa1fec0a8027a1eefa6d23587ed219a4b6
[INFO] running `"docker" "start" "-a" "8c26c3713939a7e5505f17322641b9aa1fec0a8027a1eefa6d23587ed219a4b6"`
[INFO] [stderr]    Compiling libc v0.2.47
[INFO] [stderr]    Compiling backtrace-sys v0.1.28
[INFO] [stderr]    Compiling memchr v2.1.2
[INFO] [stderr]    Compiling backtrace v0.3.13
[INFO] [stderr]    Compiling aho-corasick v0.6.9
[INFO] [stderr]    Compiling failure v0.1.5
[INFO] [stderr]    Compiling regex v1.1.0
[INFO] [stderr]    Compiling indextree v3.0.0
[INFO] [stderr]    Compiling calc v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: function is never used: `get_mock_expr`
[INFO] [stderr]   --> src/main.rs:29:1
[INFO] [stderr]    |
[INFO] [stderr] 29 | fn get_mock_expr() -> Box<str> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `get_expr`
[INFO] [stderr]   --> src/main.rs:35:1
[INFO] [stderr]    |
[INFO] [stderr] 35 | fn get_expr() -> Box<str> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `is_bracket`
[INFO] [stderr]   --> src/main.rs:50:1
[INFO] [stderr]    |
[INFO] [stderr] 50 | fn is_bracket(token: &String) -> bool {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 16.44s
[INFO] running `"docker" "inspect" "8c26c3713939a7e5505f17322641b9aa1fec0a8027a1eefa6d23587ed219a4b6"`
[INFO] running `"docker" "rm" "-f" "8c26c3713939a7e5505f17322641b9aa1fec0a8027a1eefa6d23587ed219a4b6"`
[INFO] [stdout] 8c26c3713939a7e5505f17322641b9aa1fec0a8027a1eefa6d23587ed219a4b6
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-6/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.38.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 380b4f5a813cc4baa5b0483ec370f1dd3a05883b52d7a6139132013d3f7c765c
[INFO] running `"docker" "start" "-a" "380b4f5a813cc4baa5b0483ec370f1dd3a05883b52d7a6139132013d3f7c765c"`
[INFO] [stderr]    Compiling calc v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: function is never used: `get_mock_expr`
[INFO] [stderr]   --> src/main.rs:29:1
[INFO] [stderr]    |
[INFO] [stderr] 29 | fn get_mock_expr() -> Box<str> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `get_expr`
[INFO] [stderr]   --> src/main.rs:35:1
[INFO] [stderr]    |
[INFO] [stderr] 35 | fn get_expr() -> Box<str> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `is_bracket`
[INFO] [stderr]   --> src/main.rs:50:1
[INFO] [stderr]    |
[INFO] [stderr] 50 | fn is_bracket(token: &String) -> bool {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.58s
[INFO] running `"docker" "inspect" "380b4f5a813cc4baa5b0483ec370f1dd3a05883b52d7a6139132013d3f7c765c"`
[INFO] running `"docker" "rm" "-f" "380b4f5a813cc4baa5b0483ec370f1dd3a05883b52d7a6139132013d3f7c765c"`
[INFO] [stdout] 380b4f5a813cc4baa5b0483ec370f1dd3a05883b52d7a6139132013d3f7c765c
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-6/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.38.0" "test" "--frozen"`
[INFO] [stdout] 121bde5bc14d7a4777e9d850c7ef226065861d3449b4bb22ec046f4af1f7100a
[INFO] running `"docker" "start" "-a" "121bde5bc14d7a4777e9d850c7ef226065861d3449b4bb22ec046f4af1f7100a"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/calc-76b452e20e7ca741
[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
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "121bde5bc14d7a4777e9d850c7ef226065861d3449b4bb22ec046f4af1f7100a"`
[INFO] running `"docker" "rm" "-f" "121bde5bc14d7a4777e9d850c7ef226065861d3449b4bb22ec046f4af1f7100a"`
[INFO] [stdout] 121bde5bc14d7a4777e9d850c7ef226065861d3449b4bb22ec046f4af1f7100a