[INFO] updating cached repository wismer/caesar-cipher
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/wismer/caesar-cipher
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/wismer/caesar-cipher" "work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/wismer/caesar-cipher"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/wismer/caesar-cipher'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/wismer/caesar-cipher" "work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/wismer/caesar-cipher"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/wismer/caesar-cipher'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] cda2f26c1e779c0c72a97c4388eab53d6fb84041
[INFO] sha for GitHub repo wismer/caesar-cipher: cda2f26c1e779c0c72a97c4388eab53d6fb84041
[INFO] validating manifest of wismer/caesar-cipher on toolchain master#60960a260f7b5c695fd0717311d72ce62dd4eb43
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of wismer/caesar-cipher on toolchain try#266783e4e09e4e9d5307c1c8e695659c58bbcac7
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing wismer/caesar-cipher
[INFO] finished frobbing wismer/caesar-cipher
[INFO] frobbed toml for wismer/caesar-cipher written to work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/wismer/caesar-cipher/Cargo.toml
[INFO] started frobbing wismer/caesar-cipher
[INFO] finished frobbing wismer/caesar-cipher
[INFO] frobbed toml for wismer/caesar-cipher written to work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/wismer/caesar-cipher/Cargo.toml
[INFO] crate wismer/caesar-cipher already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] checking wismer/caesar-cipher against master#60960a260f7b5c695fd0717311d72ce62dd4eb43 for pr-63376
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63376/worker-4/master#60960a260f7b5c695fd0717311d72ce62dd4eb43:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/wismer/caesar-cipher:/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" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 834e2d6d9a68a56fafea5ed85839b0f97970258a43da6bfb35799a0879538f89
[INFO] running `"docker" "start" "-a" "834e2d6d9a68a56fafea5ed85839b0f97970258a43da6bfb35799a0879538f89"`
[INFO] [stderr]     Checking caesar-cipher v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std::io`
[INFO] [stderr]  --> src/euler/euler.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::io;
[INFO] [stderr]   |     ^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::io`
[INFO] [stderr]  --> src/euler/euler.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::io;
[INFO] [stderr]   |     ^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `remainder`
[INFO] [stderr]   --> src/euler/euler.rs:40:24
[INFO] [stderr]    |
[INFO] [stderr] 40 | fn calculate_remainder(remainder: &mut i32) {
[INFO] [stderr]    |                        ^^^^^^^^^ help: consider prefixing with an underscore: `_remainder`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `remainder`
[INFO] [stderr]   --> src/euler/euler.rs:40:24
[INFO] [stderr]    |
[INFO] [stderr] 40 | fn calculate_remainder(remainder: &mut i32) {
[INFO] [stderr]    |                        ^^^^^^^^^ help: consider prefixing with an underscore: `_remainder`
[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/euler/euler.rs:16:9
[INFO] [stderr]    |
[INFO] [stderr] 16 |     let mut total_number = 0u64;
[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: variable does not need to be mutable
[INFO] [stderr]   --> src/euler/euler.rs:19:13
[INFO] [stderr]    |
[INFO] [stderr] 19 |         let mut remainder_val = numbers.iter().fold(0, |acc, &c| {
[INFO] [stderr]    |             ----^^^^^^^^^^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Neither`
[INFO] [stderr]  --> src/main.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     Neither
[INFO] [stderr]   |     ^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `calculate_remainder`
[INFO] [stderr]   --> src/euler/euler.rs:40:1
[INFO] [stderr]    |
[INFO] [stderr] 40 | fn calculate_remainder(remainder: &mut i32) {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `line_total`
[INFO] [stderr]   --> src/euler/euler.rs:44:1
[INFO] [stderr]    |
[INFO] [stderr] 44 | fn line_total(line: &str) -> u64 {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/euler/euler.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 |     file.read_to_string(&mut contents);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/euler/euler.rs:16:9
[INFO] [stderr]    |
[INFO] [stderr] 16 |     let mut total_number = 0u64;
[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: variable does not need to be mutable
[INFO] [stderr]   --> src/euler/euler.rs:19:13
[INFO] [stderr]    |
[INFO] [stderr] 19 |         let mut remainder_val = numbers.iter().fold(0, |acc, &c| {
[INFO] [stderr]    |             ----^^^^^^^^^^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Neither`
[INFO] [stderr]  --> src/main.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     Neither
[INFO] [stderr]   |     ^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `calculate_remainder`
[INFO] [stderr]   --> src/euler/euler.rs:40:1
[INFO] [stderr]    |
[INFO] [stderr] 40 | fn calculate_remainder(remainder: &mut i32) {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `line_total`
[INFO] [stderr]   --> src/euler/euler.rs:44:1
[INFO] [stderr]    |
[INFO] [stderr] 44 | fn line_total(line: &str) -> u64 {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/euler/euler.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 |     file.read_to_string(&mut contents);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.22s
[INFO] running `"docker" "inspect" "834e2d6d9a68a56fafea5ed85839b0f97970258a43da6bfb35799a0879538f89"`
[INFO] running `"docker" "rm" "-f" "834e2d6d9a68a56fafea5ed85839b0f97970258a43da6bfb35799a0879538f89"`
[INFO] [stdout] 834e2d6d9a68a56fafea5ed85839b0f97970258a43da6bfb35799a0879538f89