[INFO] updating cached repository gcrubikloud/calculator-rs
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/gcrubikloud/calculator-rs
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/gcrubikloud/calculator-rs" "work/ex/pr-61874/sources/master#9f06855064ed06a50c496577b21ca50f92a2e67d/gh/gcrubikloud/calculator-rs"`
[INFO] [stderr] Cloning into 'work/ex/pr-61874/sources/master#9f06855064ed06a50c496577b21ca50f92a2e67d/gh/gcrubikloud/calculator-rs'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/gcrubikloud/calculator-rs" "work/ex/pr-61874/sources/try#d3301713b54af69ca9de941a8c6b0d8287dbd6df/gh/gcrubikloud/calculator-rs"`
[INFO] [stderr] Cloning into 'work/ex/pr-61874/sources/try#d3301713b54af69ca9de941a8c6b0d8287dbd6df/gh/gcrubikloud/calculator-rs'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 202aa6943f24f099656635a1641dabfd2271a5a3
[INFO] sha for GitHub repo gcrubikloud/calculator-rs: 202aa6943f24f099656635a1641dabfd2271a5a3
[INFO] validating manifest of gcrubikloud/calculator-rs on toolchain master#9f06855064ed06a50c496577b21ca50f92a2e67d
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+9f06855064ed06a50c496577b21ca50f92a2e67d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of gcrubikloud/calculator-rs on toolchain try#d3301713b54af69ca9de941a8c6b0d8287dbd6df
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+d3301713b54af69ca9de941a8c6b0d8287dbd6df-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing gcrubikloud/calculator-rs
[INFO] finished frobbing gcrubikloud/calculator-rs
[INFO] frobbed toml for gcrubikloud/calculator-rs written to work/ex/pr-61874/sources/master#9f06855064ed06a50c496577b21ca50f92a2e67d/gh/gcrubikloud/calculator-rs/Cargo.toml
[INFO] started frobbing gcrubikloud/calculator-rs
[INFO] finished frobbing gcrubikloud/calculator-rs
[INFO] frobbed toml for gcrubikloud/calculator-rs written to work/ex/pr-61874/sources/try#d3301713b54af69ca9de941a8c6b0d8287dbd6df/gh/gcrubikloud/calculator-rs/Cargo.toml
[INFO] crate gcrubikloud/calculator-rs already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+9f06855064ed06a50c496577b21ca50f92a2e67d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+d3301713b54af69ca9de941a8c6b0d8287dbd6df-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking gcrubikloud/calculator-rs against try#d3301713b54af69ca9de941a8c6b0d8287dbd6df for pr-61874
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-61874/worker-2/try#d3301713b54af69ca9de941a8c6b0d8287dbd6df:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-61874/sources/try#d3301713b54af69ca9de941a8c6b0d8287dbd6df/gh/gcrubikloud/calculator-rs:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+d3301713b54af69ca9de941a8c6b0d8287dbd6df-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 672aa4295ecb082644001b5fadf5e61b43bf8c01a1f4f3af2d7acadf61a6b909
[INFO] running `"docker" "start" "-a" "672aa4295ecb082644001b5fadf5e61b43bf8c01a1f4f3af2d7acadf61a6b909"`
[INFO] [stderr]    Compiling libc v0.2.47
[INFO] [stderr]    Compiling syn v0.15.25
[INFO] [stderr]     Checking backtrace-sys v0.1.28
[INFO] [stderr]     Checking memchr v2.1.2
[INFO] [stderr]     Checking backtrace v0.3.13
[INFO] [stderr]     Checking aho-corasick v0.6.9
[INFO] [stderr]     Checking regex v1.1.0
[INFO] [stderr]    Compiling synstructure v0.10.1
[INFO] [stderr]    Compiling failure_derive v0.1.5
[INFO] [stderr]     Checking failure v0.1.5
[INFO] [stderr]     Checking indextree v3.0.0
[INFO] [stderr]     Checking calc v0.1.0 (/opt/crater/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] 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 25.83s
[INFO] running `"docker" "inspect" "672aa4295ecb082644001b5fadf5e61b43bf8c01a1f4f3af2d7acadf61a6b909"`
[INFO] running `"docker" "rm" "-f" "672aa4295ecb082644001b5fadf5e61b43bf8c01a1f4f3af2d7acadf61a6b909"`
[INFO] [stdout] 672aa4295ecb082644001b5fadf5e61b43bf8c01a1f4f3af2d7acadf61a6b909