[INFO] updating cached repository GrSpirit/rust_calculator
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/GrSpirit/rust_calculator
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/GrSpirit/rust_calculator" "work/ex/beta-1.38-1/sources/1.37.0/gh/GrSpirit/rust_calculator"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/GrSpirit/rust_calculator'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/GrSpirit/rust_calculator" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/GrSpirit/rust_calculator"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/GrSpirit/rust_calculator'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 982432986d56be0e14bdd948cb1e31955f943e1e
[INFO] sha for GitHub repo GrSpirit/rust_calculator: 982432986d56be0e14bdd948cb1e31955f943e1e
[INFO] validating manifest of GrSpirit/rust_calculator on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of GrSpirit/rust_calculator on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing GrSpirit/rust_calculator
[INFO] finished frobbing GrSpirit/rust_calculator
[INFO] frobbed toml for GrSpirit/rust_calculator written to work/ex/beta-1.38-1/sources/1.37.0/gh/GrSpirit/rust_calculator/Cargo.toml
[INFO] started frobbing GrSpirit/rust_calculator
[INFO] finished frobbing GrSpirit/rust_calculator
[INFO] frobbed toml for GrSpirit/rust_calculator written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/GrSpirit/rust_calculator/Cargo.toml
[INFO] crate GrSpirit/rust_calculator already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing GrSpirit/rust_calculator against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/GrSpirit/rust_calculator:/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=warn" "-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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] f1044804abc9cd32235b75754da8938020bef955afb18d0922c8d45eb2c75305
[INFO] running `"docker" "start" "-a" "f1044804abc9cd32235b75754da8938020bef955afb18d0922c8d45eb2c75305"`
[INFO] [stderr]    Compiling calculator v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: use of deprecated item 'core::str::<impl str>::trim_right': superseded by `trim_end`
[INFO] [stderr]  --> src/main.rs:6:11
[INFO] [stderr]   |
[INFO] [stderr] 6 |     input.trim_right().to_string()
[INFO] [stderr]   |           ^^^^^^^^^^ help: replace the use of the deprecated item: `trim_end`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `variables`
[INFO] [stderr]    --> src/main.rs:196:9
[INFO] [stderr]     |
[INFO] [stderr] 196 |     let variables = tokens.iter().filter(|x| match x { Token::Operand(op) => match op { Operand::Variable(_) => true, _=> false}, _=> false});
[INFO] [stderr]     |         ^^^^^^^^^ help: consider prefixing with an underscore: `_variables`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:198:9
[INFO] [stderr]     |
[INFO] [stderr] 198 |     let mut root = build_tree(tokens.as_slice());
[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: method is never used: `new`
[INFO] [stderr]   --> src/main.rs:64:5
[INFO] [stderr]    |
[INFO] [stderr] 64 |     fn new(t: Token) -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.97s
[INFO] running `"docker" "inspect" "f1044804abc9cd32235b75754da8938020bef955afb18d0922c8d45eb2c75305"`
[INFO] running `"docker" "rm" "-f" "f1044804abc9cd32235b75754da8938020bef955afb18d0922c8d45eb2c75305"`
[INFO] [stdout] f1044804abc9cd32235b75754da8938020bef955afb18d0922c8d45eb2c75305
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/GrSpirit/rust_calculator:/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=warn" "-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" "+beta-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] a36d8ad5c2784c6b624f03c42fe80a8075ea2455aea83489cb65bf8109b760c1
[INFO] running `"docker" "start" "-a" "a36d8ad5c2784c6b624f03c42fe80a8075ea2455aea83489cb65bf8109b760c1"`
[INFO] [stderr]    Compiling calculator v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: use of deprecated item 'core::str::<impl str>::trim_right': superseded by `trim_end`
[INFO] [stderr]  --> src/main.rs:6:11
[INFO] [stderr]   |
[INFO] [stderr] 6 |     input.trim_right().to_string()
[INFO] [stderr]   |           ^^^^^^^^^^ help: replace the use of the deprecated item: `trim_end`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `variables`
[INFO] [stderr]    --> src/main.rs:196:9
[INFO] [stderr]     |
[INFO] [stderr] 196 |     let variables = tokens.iter().filter(|x| match x { Token::Operand(op) => match op { Operand::Variable(_) => true, _=> false}, _=> false});
[INFO] [stderr]     |         ^^^^^^^^^ help: consider prefixing with an underscore: `_variables`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:198:9
[INFO] [stderr]     |
[INFO] [stderr] 198 |     let mut root = build_tree(tokens.as_slice());
[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: method is never used: `new`
[INFO] [stderr]   --> src/main.rs:64:5
[INFO] [stderr]    |
[INFO] [stderr] 64 |     fn new(t: Token) -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.66s
[INFO] running `"docker" "inspect" "a36d8ad5c2784c6b624f03c42fe80a8075ea2455aea83489cb65bf8109b760c1"`
[INFO] running `"docker" "rm" "-f" "a36d8ad5c2784c6b624f03c42fe80a8075ea2455aea83489cb65bf8109b760c1"`
[INFO] [stdout] a36d8ad5c2784c6b624f03c42fe80a8075ea2455aea83489cb65bf8109b760c1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/GrSpirit/rust_calculator:/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=warn" "-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" "+beta-2019-08-13" "test" "--frozen"`
[INFO] [stdout] bb43afd63ce9b18bda6c8bdb53d46841b5bea0067b640129d3a49bf64319d7bc
[INFO] running `"docker" "start" "-a" "bb43afd63ce9b18bda6c8bdb53d46841b5bea0067b640129d3a49bf64319d7bc"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/calculator-43bf4596ea691780
[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" "bb43afd63ce9b18bda6c8bdb53d46841b5bea0067b640129d3a49bf64319d7bc"`
[INFO] running `"docker" "rm" "-f" "bb43afd63ce9b18bda6c8bdb53d46841b5bea0067b640129d3a49bf64319d7bc"`
[INFO] [stdout] bb43afd63ce9b18bda6c8bdb53d46841b5bea0067b640129d3a49bf64319d7bc