Dec 19 13:23:25.070 INFO checking luki/2do against try#e70472fc501b855c9080f3772432c10fe20b8866 for pr-56955
Dec 19 13:23:25.070 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-4/try#e70472fc501b855c9080f3772432c10fe20b8866:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/gh/luki/2do:/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" "+e70472fc501b855c9080f3772432c10fe20b8866-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 13:23:25.316 INFO [stdout] 03186b9cea32714fdf0a3156ade31ac474ab0b9e84cae2c457c389c48623fc4f
Dec 19 13:23:25.319 INFO running `"docker" "start" "-a" "03186b9cea32714fdf0a3156ade31ac474ab0b9e84cae2c457c389c48623fc4f"`
Dec 19 13:23:26.080 INFO [stderr]     Checking chrono v0.2.25
Dec 19 13:23:27.542 INFO [stderr]     Checking todo v0.1.0 (/opt/crater/workdir)
Dec 19 13:23:27.879 INFO [stderr] warning: variable does not need to be mutable
Dec 19 13:23:27.879 INFO [stderr]   --> src/main.rs:43:13
Dec 19 13:23:27.879 INFO [stderr]    |
Dec 19 13:23:27.879 INFO [stderr] 43 |         let mut content = read_from_file(file);
Dec 19 13:23:27.879 INFO [stderr]    |             ----^^^^^^^
Dec 19 13:23:27.879 INFO [stderr]    |             |
Dec 19 13:23:27.879 INFO [stderr]    |             help: remove this `mut`
Dec 19 13:23:27.879 INFO [stderr]    |
Dec 19 13:23:27.879 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 19 13:23:27.879 INFO [stderr] 
Dec 19 13:23:27.879 INFO [stderr] warning: variable does not need to be mutable
Dec 19 13:23:27.879 INFO [stderr]   --> src/main.rs:44:13
Dec 19 13:23:27.879 INFO [stderr]    |
Dec 19 13:23:27.879 INFO [stderr] 44 |         let mut content_vec: Vec<&str> = content.split("\n\n").collect();
Dec 19 13:23:27.879 INFO [stderr]    |             ----^^^^^^^^^^^
Dec 19 13:23:27.880 INFO [stderr]    |             |
Dec 19 13:23:27.880 INFO [stderr]    |             help: remove this `mut`
Dec 19 13:23:27.880 INFO [stderr] 
Dec 19 13:23:27.880 INFO [stderr] warning: variable does not need to be mutable
Dec 19 13:23:27.880 INFO [stderr]   --> src/main.rs:81:9
Dec 19 13:23:27.880 INFO [stderr]    |
Dec 19 13:23:27.880 INFO [stderr] 81 |     let mut file = match File::create(format!("{}.{}", file_name, file_extension)) {
Dec 19 13:23:27.880 INFO [stderr]    |         ----^^^^
Dec 19 13:23:27.880 INFO [stderr]    |         |
Dec 19 13:23:27.880 INFO [stderr]    |         help: remove this `mut`
Dec 19 13:23:27.880 INFO [stderr] 
Dec 19 13:23:27.880 INFO [stderr] warning: method is never used: `save_as_file`
Dec 19 13:23:27.880 INFO [stderr]   --> src/main.rs:32:5
Dec 19 13:23:27.880 INFO [stderr]    |
Dec 19 13:23:27.880 INFO [stderr] 32 |     fn save_as_file(&self) {
Dec 19 13:23:27.880 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:23:27.880 INFO [stderr]    |
Dec 19 13:23:27.880 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 19 13:23:27.880 INFO [stderr] 
Dec 19 13:23:27.880 INFO [stderr] warning: function is never used: `create_file`
Dec 19 13:23:27.880 INFO [stderr]   --> src/main.rs:80:1
Dec 19 13:23:27.880 INFO [stderr]    |
Dec 19 13:23:27.880 INFO [stderr] 80 | fn create_file(file_name: &str, file_extension: &str) -> File {
Dec 19 13:23:27.880 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:23:27.880 INFO [stderr] 
Dec 19 13:23:27.880 INFO [stderr] warning: function is never used: `write_to_file`
Dec 19 13:23:27.880 INFO [stderr]    --> src/main.rs:105:1
Dec 19 13:23:27.880 INFO [stderr]     |
Dec 19 13:23:27.880 INFO [stderr] 105 | fn write_to_file(file: &mut File, content: &str) {
Dec 19 13:23:27.880 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:23:27.880 INFO [stderr] 
Dec 19 13:23:27.880 INFO [stderr] warning: function is never used: `override_file`
Dec 19 13:23:27.880 INFO [stderr]    --> src/main.rs:110:1
Dec 19 13:23:27.880 INFO [stderr]     |
Dec 19 13:23:27.880 INFO [stderr] 110 | fn override_file(file: &mut File, content: &str) {
Dec 19 13:23:27.880 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:23:27.880 INFO [stderr] 
Dec 19 13:23:27.888 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 13:23:27.888 INFO [stderr]    --> src/main.rs:107:5
Dec 19 13:23:27.888 INFO [stderr]     |
Dec 19 13:23:27.888 INFO [stderr] 107 |     file.write_all(content.as_bytes());
Dec 19 13:23:27.888 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:23:27.888 INFO [stderr]     |
Dec 19 13:23:27.888 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 19 13:23:27.888 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 13:23:27.888 INFO [stderr] 
Dec 19 13:23:27.888 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 13:23:27.888 INFO [stderr]    --> src/main.rs:111:5
Dec 19 13:23:27.888 INFO [stderr]     |
Dec 19 13:23:27.888 INFO [stderr] 111 |     file.write_all(content.as_bytes());
Dec 19 13:23:27.888 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:23:27.888 INFO [stderr]     |
Dec 19 13:23:27.888 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 13:23:27.888 INFO [stderr] 
Dec 19 13:23:27.893 INFO [stderr] warning: variable does not need to be mutable
Dec 19 13:23:27.893 INFO [stderr]   --> src/main.rs:43:13
Dec 19 13:23:27.893 INFO [stderr]    |
Dec 19 13:23:27.893 INFO [stderr] 43 |         let mut content = read_from_file(file);
Dec 19 13:23:27.893 INFO [stderr]    |             ----^^^^^^^
Dec 19 13:23:27.893 INFO [stderr]    |             |
Dec 19 13:23:27.893 INFO [stderr]    |             help: remove this `mut`
Dec 19 13:23:27.893 INFO [stderr]    |
Dec 19 13:23:27.893 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 19 13:23:27.893 INFO [stderr] 
Dec 19 13:23:27.893 INFO [stderr] warning: variable does not need to be mutable
Dec 19 13:23:27.893 INFO [stderr]   --> src/main.rs:44:13
Dec 19 13:23:27.893 INFO [stderr]    |
Dec 19 13:23:27.893 INFO [stderr] 44 |         let mut content_vec: Vec<&str> = content.split("\n\n").collect();
Dec 19 13:23:27.893 INFO [stderr]    |             ----^^^^^^^^^^^
Dec 19 13:23:27.893 INFO [stderr]    |             |
Dec 19 13:23:27.893 INFO [stderr]    |             help: remove this `mut`
Dec 19 13:23:27.893 INFO [stderr] 
Dec 19 13:23:27.893 INFO [stderr] warning: variable does not need to be mutable
Dec 19 13:23:27.893 INFO [stderr]   --> src/main.rs:81:9
Dec 19 13:23:27.893 INFO [stderr]    |
Dec 19 13:23:27.893 INFO [stderr] 81 |     let mut file = match File::create(format!("{}.{}", file_name, file_extension)) {
Dec 19 13:23:27.893 INFO [stderr]    |         ----^^^^
Dec 19 13:23:27.893 INFO [stderr]    |         |
Dec 19 13:23:27.893 INFO [stderr]    |         help: remove this `mut`
Dec 19 13:23:27.893 INFO [stderr] 
Dec 19 13:23:27.905 INFO [stderr] warning: method is never used: `save_as_file`
Dec 19 13:23:27.905 INFO [stderr]   --> src/main.rs:32:5
Dec 19 13:23:27.905 INFO [stderr]    |
Dec 19 13:23:27.905 INFO [stderr] 32 |     fn save_as_file(&self) {
Dec 19 13:23:27.905 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:23:27.905 INFO [stderr]    |
Dec 19 13:23:27.905 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 19 13:23:27.905 INFO [stderr] 
Dec 19 13:23:27.905 INFO [stderr] warning: function is never used: `create_file`
Dec 19 13:23:27.905 INFO [stderr]   --> src/main.rs:80:1
Dec 19 13:23:27.905 INFO [stderr]    |
Dec 19 13:23:27.905 INFO [stderr] 80 | fn create_file(file_name: &str, file_extension: &str) -> File {
Dec 19 13:23:27.905 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:23:27.905 INFO [stderr] 
Dec 19 13:23:27.905 INFO [stderr] warning: function is never used: `write_to_file`
Dec 19 13:23:27.905 INFO [stderr]    --> src/main.rs:105:1
Dec 19 13:23:27.905 INFO [stderr]     |
Dec 19 13:23:27.905 INFO [stderr] 105 | fn write_to_file(file: &mut File, content: &str) {
Dec 19 13:23:27.905 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:23:27.905 INFO [stderr] 
Dec 19 13:23:27.905 INFO [stderr] warning: function is never used: `override_file`
Dec 19 13:23:27.905 INFO [stderr]    --> src/main.rs:110:1
Dec 19 13:23:27.905 INFO [stderr]     |
Dec 19 13:23:27.905 INFO [stderr] 110 | fn override_file(file: &mut File, content: &str) {
Dec 19 13:23:27.905 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:23:27.905 INFO [stderr] 
Dec 19 13:23:27.918 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 13:23:27.918 INFO [stderr]    --> src/main.rs:107:5
Dec 19 13:23:27.918 INFO [stderr]     |
Dec 19 13:23:27.918 INFO [stderr] 107 |     file.write_all(content.as_bytes());
Dec 19 13:23:27.918 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:23:27.918 INFO [stderr]     |
Dec 19 13:23:27.918 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 19 13:23:27.918 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 13:23:27.918 INFO [stderr] 
Dec 19 13:23:27.918 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 13:23:27.918 INFO [stderr]    --> src/main.rs:111:5
Dec 19 13:23:27.918 INFO [stderr]     |
Dec 19 13:23:27.918 INFO [stderr] 111 |     file.write_all(content.as_bytes());
Dec 19 13:23:27.918 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:23:27.918 INFO [stderr]     |
Dec 19 13:23:27.918 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 13:23:27.918 INFO [stderr] 
Dec 19 13:23:27.972 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.93s
Dec 19 13:23:28.596 INFO running `"docker" "inspect" "03186b9cea32714fdf0a3156ade31ac474ab0b9e84cae2c457c389c48623fc4f"`
Dec 19 13:23:28.906 INFO running `"docker" "rm" "-f" "03186b9cea32714fdf0a3156ade31ac474ab0b9e84cae2c457c389c48623fc4f"`
Dec 19 13:23:29.164 INFO [stdout] 03186b9cea32714fdf0a3156ade31ac474ab0b9e84cae2c457c389c48623fc4f