[INFO] cloning repository https://github.com/psatomas/closures
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/psatomas/closures" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpsatomas%2Fclosures", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpsatomas%2Fclosures'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1779f98dd22f1f5353cb41496ef67383bf32ccc6
[INFO] fixing psatomas/closures against try#622891a4e29178280638a6b63a8908bde2c0c854+cargoflags=-Zfix-edition=start=2015 for pr-157817-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpsatomas%2Fclosures" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/psatomas/closures
[INFO] finished tweaking git repo https://github.com/psatomas/closures
[INFO] tweaked toml for git repo https://github.com/psatomas/closures written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/psatomas/closures on toolchain 622891a4e29178280638a6b63a8908bde2c0c854
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+622891a4e29178280638a6b63a8908bde2c0c854" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/psatomas/closures already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+622891a4e29178280638a6b63a8908bde2c0c854" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/source:/opt/rustwide/workdir:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3a6becf2bc8dde7f3fa57ede90e4f284e72d296796fc446bbb1e2c7cc0530151" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 6f341882201c72463972470b984f28426237044e20135613df657b934e9e0336
[INFO] running `Command { std: "docker" "start" "6f341882201c72463972470b984f28426237044e20135613df657b934e9e0336", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "6f341882201c72463972470b984f28426237044e20135613df657b934e9e0336" "/opt/rustwide/cargo-home/bin/cargo" "+622891a4e29178280638a6b63a8908bde2c0c854" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6f341882201c72463972470b984f28426237044e20135613df657b934e9e0336", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=" "-e" "RUSTDOCFLAGS=" "-w" "/opt/rustwide/workdir" "--user" "0:0" "6f341882201c72463972470b984f28426237044e20135613df657b934e9e0336" "/opt/rustwide/cargo-home/bin/cargo" "+622891a4e29178280638a6b63a8908bde2c0c854" "fix" "--allow-no-vcs" "--allow-dirty" "--frozen" "--all" "--all-targets" "--message-format=json" "-Zfix-edition=start=2015", kill_on_drop: false }`
[INFO] [stderr]     Checking closures v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `multiplier`
[INFO] [stdout]  --> src/bin/nested_functions.rs:2:9
[INFO] [stdout]   |
[INFO] [stdout] 2 |     let multiplier = 3;
[INFO] [stdout]   |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_multiplier`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]  --> src/bin/nested_functions.rs:4:20
[INFO] [stdout]   |
[INFO] [stdout] 4 |     fn multiply_by(value: i32) -> i32 {
[INFO] [stdout]   |                    ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/bin/coding_challenge.rs:13:37
[INFO] [stdout]    |
[INFO] [stdout] 13 |     fn traverse_items<F>(&mut self, mut operation: F)
[INFO] [stdout]    |                                     ----^^^^^^^^^
[INFO] [stdout]    |                                     |
[INFO] [stdout]    |                                     help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0594]: cannot assign to `total_price`, as it is a captured variable in a `Fn` closure
[INFO] [stdout]   --> src/bin/coding_challenge.rs:62:13
[INFO] [stdout]    |
[INFO] [stdout] 13 |       fn traverse_items<F>(&mut self, mut operation: F)
[INFO] [stdout]    |                                                      - change this to accept `FnMut` instead of `Fn`
[INFO] [stdout] ...
[INFO] [stdout] 57 |       let mut total_price = 0.0;
[INFO] [stdout]    |           --------------- `total_price` declared here, outside the closure
[INFO] [stdout] ...
[INFO] [stdout] 61 |           cart.traverse_items(|item| {
[INFO] [stdout]    |                -              ------ in this closure
[INFO] [stdout]    |  ______________|
[INFO] [stdout]    | |
[INFO] [stdout] 62 | |             total_price += item.price;
[INFO] [stdout]    | |             ^^^^^^^^^^^^^^^^^^^^^^^^^ cannot assign
[INFO] [stdout] 63 | |         });
[INFO] [stdout]    | |__________- expects `Fn` instead of `FnMut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0594`.
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/bin/defining_a_method_that_accepts_a_closure_i.rs:30:9
[INFO] [stdout]    |
[INFO] [stdout] 30 |         stdin().read_line(&mut user_input);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 30 |         let _ = stdin().read_line(&mut user_input);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: invalid character '.' in crate name: `the_string.retain_method`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `closures` (bin "the_string.retain_method" test) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `closures` (bin "coding_challenge" test) due to 1 previous error; 1 warning emitted
[INFO] [stdout] warning: function `execute_thrice` is never used
[INFO] [stdout]  --> src/bin/passing_in_a_function_to_Fn_trait_parameter.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn execute_thrice<F>(mut procedure: F)
[INFO] [stdout]   |    ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `bake_cake` is never used
[INFO] [stdout]   --> src/bin/passing_in_a_function_to_Fn_trait_parameter.rs:10:4
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn bake_cake() {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `multiplier`
[INFO] [stdout]  --> src/bin/nested_functions.rs:2:9
[INFO] [stdout]   |
[INFO] [stdout] 2 |     let multiplier = 3;
[INFO] [stdout]   |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_multiplier`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]  --> src/bin/nested_functions.rs:4:20
[INFO] [stdout]   |
[INFO] [stdout] 4 |     fn multiply_by(value: i32) -> i32 {
[INFO] [stdout]   |                    ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/bin/defining_a_method_that_accepts_a_closure_i.rs:30:9
[INFO] [stdout]    |
[INFO] [stdout] 30 |         stdin().read_line(&mut user_input);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 30 |         let _ = stdin().read_line(&mut user_input);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "6f341882201c72463972470b984f28426237044e20135613df657b934e9e0336", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6f341882201c72463972470b984f28426237044e20135613df657b934e9e0336", kill_on_drop: false }`
[INFO] [stdout] 6f341882201c72463972470b984f28426237044e20135613df657b934e9e0336
