[INFO] cloning repository https://github.com/ajmwagar/calc
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ajmwagar/calc" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fajmwagar%2Fcalc", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fajmwagar%2Fcalc'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b55f230da5f96e8f4dcefe34c55133e559de521b
[INFO] testing ajmwagar/calc against 1.47.0 for beta-1.48-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fajmwagar%2Fcalc" "/workspace/builds/worker-14/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] [stderr] Checking out files:  90% (448/496)   
Checking out files:  91% (452/496)   
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Checking out files:  93% (462/496)   
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Checking out files: 100% (496/496), done.
[INFO] validating manifest of git repo https://github.com/ajmwagar/calc on toolchain 1.47.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ajmwagar/calc
[INFO] finished tweaking git repo https://github.com/ajmwagar/calc
[INFO] tweaked toml for git repo https://github.com/ajmwagar/calc written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate git repo https://github.com/ajmwagar/calc already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 341c9c07bd1e43fa547692e39bd0c7545b7c57109f7c19fd4706ca6007274b5e
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "341c9c07bd1e43fa547692e39bd0c7545b7c57109f7c19fd4706ca6007274b5e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "341c9c07bd1e43fa547692e39bd0c7545b7c57109f7c19fd4706ca6007274b5e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "341c9c07bd1e43fa547692e39bd0c7545b7c57109f7c19fd4706ca6007274b5e", kill_on_drop: false }`
[INFO] [stdout] 341c9c07bd1e43fa547692e39bd0c7545b7c57109f7c19fd4706ca6007274b5e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 026c72985fab27aa6b231b26f8ddead019f4e38e8ae5f5e25aa667a5a85fef1a
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "026c72985fab27aa6b231b26f8ddead019f4e38e8ae5f5e25aa667a5a85fef1a", kill_on_drop: false }`
[INFO] [stderr]    Compiling rand_core v0.2.0
[INFO] [stderr]    Compiling libc v0.2.41
[INFO] [stderr]    Compiling rand v0.5.0
[INFO] [stderr]    Compiling calc v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `rand::prelude::*`
[INFO] [stdout]  --> src/main.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use rand::prelude::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]    --> src/main.rs:11:29
[INFO] [stdout]     |
[INFO] [stdout] 11  |         loop { let _ = $xs; break; }
[INFO] [stdout]     |                             ^^^^^^ unreachable statement
[INFO] [stdout] ...
[INFO] [stdout] 138 |         "Cleared!" => block!({ break; }),
[INFO] [stdout]     |                       ------------------
[INFO] [stdout]     |                       |        |
[INFO] [stdout]     |                       |        any code following this expression is unreachable
[INFO] [stdout]     |                       in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]    --> src/main.rs:11:29
[INFO] [stdout]     |
[INFO] [stdout] 11  |         loop { let _ = $xs; break; }
[INFO] [stdout]     |                             ^^^^^^ unreachable statement
[INFO] [stdout] ...
[INFO] [stdout] 140 |         "Goodbye!" => block!({ break; }),
[INFO] [stdout]     |                       ------------------
[INFO] [stdout]     |                       |        |
[INFO] [stdout]     |                       |        any code following this expression is unreachable
[INFO] [stdout]     |                       in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]    --> src/main.rs:11:29
[INFO] [stdout]     |
[INFO] [stdout] 11  |         loop { let _ = $xs; break; }
[INFO] [stdout]     |                             ^^^^^^ unreachable statement
[INFO] [stdout] ...
[INFO] [stdout] 142 |         "Please enter a valid expression." => block!({ break; }),
[INFO] [stdout]     |                                               ------------------
[INFO] [stdout]     |                                               |        |
[INFO] [stdout]     |                                               |        any code following this expression is unreachable
[INFO] [stdout]     |                                               in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]    --> src/main.rs:218:5
[INFO] [stdout]     |
[INFO] [stdout] 217 |     std::process::exit(code);
[INFO] [stdout]     |     ------------------------ any code following this expression is unreachable
[INFO] [stdout] 218 |     return "Goodbye!".to_string();
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `string_help`
[INFO] [stdout]    --> src/main.rs:132:9
[INFO] [stdout]     |
[INFO] [stdout] 132 |     let string_help = HELP.to_string();
[INFO] [stdout]     |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_string_help`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `print`
[INFO] [stdout]    --> src/main.rs:135:9
[INFO] [stdout]     |
[INFO] [stdout] 135 |     let print: bool;
[INFO] [stdout]     |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_print`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:160:21
[INFO] [stdout]     |
[INFO] [stdout] 160 | fn parse(s: String, mut ans: f64) -> String {
[INFO] [stdout]     |                     ----^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.44s
[INFO] running `Command { std: "docker" "inspect" "026c72985fab27aa6b231b26f8ddead019f4e38e8ae5f5e25aa667a5a85fef1a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "026c72985fab27aa6b231b26f8ddead019f4e38e8ae5f5e25aa667a5a85fef1a", kill_on_drop: false }`
[INFO] [stdout] 026c72985fab27aa6b231b26f8ddead019f4e38e8ae5f5e25aa667a5a85fef1a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d342fa03c489f3ab856399e4ef8ec23138ef03e4a2ceb1e2db3199081a18c6a2
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "d342fa03c489f3ab856399e4ef8ec23138ef03e4a2ceb1e2db3199081a18c6a2", kill_on_drop: false }`
[INFO] [stderr]    Compiling calc v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `rand::prelude::*`
[INFO] [stdout]  --> src/main.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use rand::prelude::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]    --> src/main.rs:11:29
[INFO] [stdout]     |
[INFO] [stdout] 11  |         loop { let _ = $xs; break; }
[INFO] [stdout]     |                             ^^^^^^ unreachable statement
[INFO] [stdout] ...
[INFO] [stdout] 138 |         "Cleared!" => block!({ break; }),
[INFO] [stdout]     |                       ------------------
[INFO] [stdout]     |                       |        |
[INFO] [stdout]     |                       |        any code following this expression is unreachable
[INFO] [stdout]     |                       in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]    --> src/main.rs:11:29
[INFO] [stdout]     |
[INFO] [stdout] 11  |         loop { let _ = $xs; break; }
[INFO] [stdout]     |                             ^^^^^^ unreachable statement
[INFO] [stdout] ...
[INFO] [stdout] 140 |         "Goodbye!" => block!({ break; }),
[INFO] [stdout]     |                       ------------------
[INFO] [stdout]     |                       |        |
[INFO] [stdout]     |                       |        any code following this expression is unreachable
[INFO] [stdout]     |                       in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]    --> src/main.rs:11:29
[INFO] [stdout]     |
[INFO] [stdout] 11  |         loop { let _ = $xs; break; }
[INFO] [stdout]     |                             ^^^^^^ unreachable statement
[INFO] [stdout] ...
[INFO] [stdout] 142 |         "Please enter a valid expression." => block!({ break; }),
[INFO] [stdout]     |                                               ------------------
[INFO] [stdout]     |                                               |        |
[INFO] [stdout]     |                                               |        any code following this expression is unreachable
[INFO] [stdout]     |                                               in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]    --> src/main.rs:218:5
[INFO] [stdout]     |
[INFO] [stdout] 217 |     std::process::exit(code);
[INFO] [stdout]     |     ------------------------ any code following this expression is unreachable
[INFO] [stdout] 218 |     return "Goodbye!".to_string();
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `string_help`
[INFO] [stdout]    --> src/main.rs:132:9
[INFO] [stdout]     |
[INFO] [stdout] 132 |     let string_help = HELP.to_string();
[INFO] [stdout]     |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_string_help`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `print`
[INFO] [stdout]    --> src/main.rs:135:9
[INFO] [stdout]     |
[INFO] [stdout] 135 |     let print: bool;
[INFO] [stdout]     |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_print`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:160:21
[INFO] [stdout]     |
[INFO] [stdout] 160 | fn parse(s: String, mut ans: f64) -> String {
[INFO] [stdout]     |                     ----^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.80s
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "d342fa03c489f3ab856399e4ef8ec23138ef03e4a2ceb1e2db3199081a18c6a2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d342fa03c489f3ab856399e4ef8ec23138ef03e4a2ceb1e2db3199081a18c6a2", kill_on_drop: false }`
[INFO] [stdout] d342fa03c489f3ab856399e4ef8ec23138ef03e4a2ceb1e2db3199081a18c6a2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] fc089ca7a18ace679a8da658647a065a68b2f8315e0ddbdb46b89461251a0045
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "fc089ca7a18ace679a8da658647a065a68b2f8315e0ddbdb46b89461251a0045", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `rand::prelude::*`
[INFO] [stderr]  --> src/main.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use rand::prelude::*;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable statement
[INFO] [stderr]    --> src/main.rs:11:29
[INFO] [stderr]     |
[INFO] [stderr] 11  |         loop { let _ = $xs; break; }
[INFO] [stderr]     |                             ^^^^^^ unreachable statement
[INFO] [stderr] ...
[INFO] [stderr] 138 |         "Cleared!" => block!({ break; }),
[INFO] [stderr]     |                       ------------------
[INFO] [stderr]     |                       |        |
[INFO] [stderr]     |                       |        any code following this expression is unreachable
[INFO] [stderr]     |                       in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable statement
[INFO] [stderr]    --> src/main.rs:11:29
[INFO] [stderr]     |
[INFO] [stderr] 11  |         loop { let _ = $xs; break; }
[INFO] [stderr]     |                             ^^^^^^ unreachable statement
[INFO] [stderr] ...
[INFO] [stderr] 140 |         "Goodbye!" => block!({ break; }),
[INFO] [stderr]     |                       ------------------
[INFO] [stderr]     |                       |        |
[INFO] [stderr]     |                       |        any code following this expression is unreachable
[INFO] [stderr]     |                       in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable statement
[INFO] [stderr]    --> src/main.rs:11:29
[INFO] [stderr]     |
[INFO] [stderr] 11  |         loop { let _ = $xs; break; }
[INFO] [stderr]     |                             ^^^^^^ unreachable statement
[INFO] [stderr] ...
[INFO] [stderr] 142 |         "Please enter a valid expression." => block!({ break; }),
[INFO] [stderr]     |                                               ------------------
[INFO] [stderr]     |                                               |        |
[INFO] [stderr]     |                                               |        any code following this expression is unreachable
[INFO] [stderr]     |                                               in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable statement
[INFO] [stderr]    --> src/main.rs:218:5
[INFO] [stderr]     |
[INFO] [stderr] 217 |     std::process::exit(code);
[INFO] [stderr]     |     ------------------------ any code following this expression is unreachable
[INFO] [stderr] 218 |     return "Goodbye!".to_string();
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `string_help`
[INFO] [stderr]    --> src/main.rs:132:9
[INFO] [stderr]     |
[INFO] [stderr] 132 |     let string_help = HELP.to_string();
[INFO] [stderr]     |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_string_help`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `print`
[INFO] [stderr]    --> src/main.rs:135:9
[INFO] [stderr]     |
[INFO] [stderr] 135 |     let print: bool;
[INFO] [stderr]     |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_print`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:160:21
[INFO] [stderr]     |
[INFO] [stderr] 160 | fn parse(s: String, mut ans: f64) -> String {
[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: 8 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/calc-7f88fd964999a83a
[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 `Command { std: "docker" "inspect" "fc089ca7a18ace679a8da658647a065a68b2f8315e0ddbdb46b89461251a0045", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fc089ca7a18ace679a8da658647a065a68b2f8315e0ddbdb46b89461251a0045", kill_on_drop: false }`
[INFO] [stdout] fc089ca7a18ace679a8da658647a065a68b2f8315e0ddbdb46b89461251a0045
