[INFO] updating cached repository Shyclops/calculator
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/Shyclops/calculator
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/Shyclops/calculator" "work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/Shyclops/calculator"`
[INFO] [stderr] Cloning into 'work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/Shyclops/calculator'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Shyclops/calculator" "work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/Shyclops/calculator"`
[INFO] [stderr] Cloning into 'work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/Shyclops/calculator'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] dc435ff53aaaefba7a9a294180c657b9694393a3
[INFO] sha for GitHub repo Shyclops/calculator: dc435ff53aaaefba7a9a294180c657b9694393a3
[INFO] validating manifest of Shyclops/calculator on toolchain master#0f88167f89fffe321590c5148f21b7d51d44388d
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0f88167f89fffe321590c5148f21b7d51d44388d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of Shyclops/calculator on toolchain try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing Shyclops/calculator
[INFO] finished frobbing Shyclops/calculator
[INFO] frobbed toml for Shyclops/calculator written to work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/Shyclops/calculator/Cargo.toml
[INFO] started frobbing Shyclops/calculator
[INFO] finished frobbing Shyclops/calculator
[INFO] frobbed toml for Shyclops/calculator written to work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/Shyclops/calculator/Cargo.toml
[INFO] crate Shyclops/calculator already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0f88167f89fffe321590c5148f21b7d51d44388d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking Shyclops/calculator against try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b for pr-58948
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-58948/worker-2/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/Shyclops/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=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" "+a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 13b50de7fbc12c38a73807040fe8cbe46f84412c22d20057e45562f1ab61be0f
[INFO] running `"docker" "start" "-a" "13b50de7fbc12c38a73807040fe8cbe46f84412c22d20057e45562f1ab61be0f"`
[INFO] [stderr]     Checking calculator v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `operators`
[INFO] [stderr]   --> src/reverse_polish_notation/parser.rs:17:10
[INFO] [stderr]    |
[INFO] [stderr] 17 |     let mut operators: Vec<Expression> = Vec::new();
[INFO] [stderr]    |             ^^^^^^^^^ help: consider prefixing with an underscore: `_operators`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `o`
[INFO] [stderr]   --> src/reverse_polish_notation/parser.rs:21:25
[INFO] [stderr]    |
[INFO] [stderr] 21 |             Expression::Operator(o)    => {},
[INFO] [stderr]    |                                  ^ help: consider prefixing with an underscore: `_o`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `v`
[INFO] [stderr]   --> src/reverse_polish_notation/parser.rs:22:20
[INFO] [stderr]    |
[INFO] [stderr] 22 |             Expression::Val(v)        => output.push(ex),
[INFO] [stderr]    |                             ^ help: consider prefixing with an underscore: `_v`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `operator`
[INFO] [stderr]   --> src/reverse_polish_notation/parser.rs:82:19
[INFO] [stderr]    |
[INFO] [stderr] 82 | fn get_precedence(operator: String) -> i8 {
[INFO] [stderr]    |                   ^^^^^^^^ help: consider prefixing with an underscore: `_operator`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/reverse_polish_notation/parser.rs:17:6
[INFO] [stderr]    |
[INFO] [stderr] 17 |     let mut operators: Vec<Expression> = Vec::new();
[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: function is never used: `get_precedence`
[INFO] [stderr]   --> src/reverse_polish_notation/parser.rs:82:1
[INFO] [stderr]    |
[INFO] [stderr] 82 | fn get_precedence(operator: String) -> i8 {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `operators`
[INFO] [stderr]   --> src/reverse_polish_notation/parser.rs:17:10
[INFO] [stderr]    |
[INFO] [stderr] 17 |     let mut operators: Vec<Expression> = Vec::new();
[INFO] [stderr]    |             ^^^^^^^^^ help: consider prefixing with an underscore: `_operators`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `o`
[INFO] [stderr]   --> src/reverse_polish_notation/parser.rs:21:25
[INFO] [stderr]    |
[INFO] [stderr] 21 |             Expression::Operator(o)    => {},
[INFO] [stderr]    |                                  ^ help: consider prefixing with an underscore: `_o`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `v`
[INFO] [stderr]   --> src/reverse_polish_notation/parser.rs:22:20
[INFO] [stderr]    |
[INFO] [stderr] 22 |             Expression::Val(v)        => output.push(ex),
[INFO] [stderr]    |                             ^ help: consider prefixing with an underscore: `_v`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `operator`
[INFO] [stderr]   --> src/reverse_polish_notation/parser.rs:82:19
[INFO] [stderr]    |
[INFO] [stderr] 82 | fn get_precedence(operator: String) -> i8 {
[INFO] [stderr]    |                   ^^^^^^^^ help: consider prefixing with an underscore: `_operator`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/reverse_polish_notation/parser.rs:17:6
[INFO] [stderr]    |
[INFO] [stderr] 17 |     let mut operators: Vec<Expression> = Vec::new();
[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: function is never used: `get_precedence`
[INFO] [stderr]   --> src/reverse_polish_notation/parser.rs:82:1
[INFO] [stderr]    |
[INFO] [stderr] 82 | fn get_precedence(operator: String) -> i8 {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.38s
[INFO] running `"docker" "inspect" "13b50de7fbc12c38a73807040fe8cbe46f84412c22d20057e45562f1ab61be0f"`
[INFO] running `"docker" "rm" "-f" "13b50de7fbc12c38a73807040fe8cbe46f84412c22d20057e45562f1ab61be0f"`
[INFO] [stdout] 13b50de7fbc12c38a73807040fe8cbe46f84412c22d20057e45562f1ab61be0f