[INFO] updating cached repository LImoritakeU/rust_playgroud [INFO] running `"git" "fetch" "--all"` [INFO] [stdout] Fetching origin [INFO] [stderr] From git://github.com/LImoritakeU/rust_playgroud [INFO] [stderr] * branch HEAD -> FETCH_HEAD [INFO] running `"git" "clone" "work/cache/sources/gh/LImoritakeU/rust_playgroud" "work/ex/beta-1.38-1/sources/1.37.0/gh/LImoritakeU/rust_playgroud"` [INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/LImoritakeU/rust_playgroud'... [INFO] [stderr] done. [INFO] running `"git" "clone" "work/cache/sources/gh/LImoritakeU/rust_playgroud" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/LImoritakeU/rust_playgroud"` [INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/LImoritakeU/rust_playgroud'... [INFO] [stderr] done. [INFO] running `"git" "rev-parse" "HEAD"` [INFO] [stdout] 28adbc8277ad94b65997893f8a4d6a0a72a0edf1 [INFO] sha for GitHub repo LImoritakeU/rust_playgroud: 28adbc8277ad94b65997893f8a4d6a0a72a0edf1 [INFO] validating manifest of LImoritakeU/rust_playgroud on toolchain 1.37.0 [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] validating manifest of LImoritakeU/rust_playgroud on toolchain beta-2019-08-13 [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] started frobbing LImoritakeU/rust_playgroud [INFO] finished frobbing LImoritakeU/rust_playgroud [INFO] frobbed toml for LImoritakeU/rust_playgroud written to work/ex/beta-1.38-1/sources/1.37.0/gh/LImoritakeU/rust_playgroud/Cargo.toml [INFO] started frobbing LImoritakeU/rust_playgroud [INFO] finished frobbing LImoritakeU/rust_playgroud [INFO] frobbed toml for LImoritakeU/rust_playgroud written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/LImoritakeU/rust_playgroud/Cargo.toml [INFO] crate LImoritakeU/rust_playgroud already has a lockfile, it will not be regenerated [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] testing LImoritakeU/rust_playgroud against 1.37.0 for beta-1.38-1 [INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/LImoritakeU/rust_playgroud:/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=warn" "-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" "+1.37.0" "build" "--frozen"` [INFO] [stdout] 494aa864e00b4bf7367c8bbac46ff19db5849dcf881231ed67305c523aa52b3e [INFO] running `"docker" "start" "-a" "494aa864e00b4bf7367c8bbac46ff19db5849dcf881231ed67305c523aa52b3e"` [INFO] [stderr] Compiling playground v0.1.0 (/opt/crater/workdir) [INFO] [stderr] warning: unused doc comment [INFO] [stderr] --> src/main.rs:180:5 [INFO] [stderr] | [INFO] [stderr] 180 | /// Array, Vector, and Slice [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] 181 | // new array [INFO] [stderr] 182 | let arr = ["eins", "zwei"]; [INFO] [stderr] | --------------------------- rustdoc does not generate documentation for statements [INFO] [stderr] | [INFO] [stderr] = note: #[warn(unused_doc_comments)] on by default [INFO] [stderr] [INFO] [stderr] warning: unused import: `std::intrinsics::write_bytes` [INFO] [stderr] --> src/main.rs:7:5 [INFO] [stderr] | [INFO] [stderr] 7 | use std::intrinsics::write_bytes; [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: #[warn(unused_imports)] on by default [INFO] [stderr] [INFO] [stderr] warning: unused import: `stdin` [INFO] [stderr] --> src/practice_57/practice07.rs:1:28 [INFO] [stderr] | [INFO] [stderr] 1 | use std::io::{self, Write, stdin}; [INFO] [stderr] | ^^^^^ [INFO] [stderr] [INFO] [stderr] warning: the item `Formatter` is imported redundantly [INFO] [stderr] --> src/main.rs:127:26 [INFO] [stderr] | [INFO] [stderr] 8 | use std::fmt::{Display, Formatter}; [INFO] [stderr] | --------- the item `Formatter` is already imported here [INFO] [stderr] ... [INFO] [stderr] 127 | use std::fmt::{self, Formatter, Display}; [INFO] [stderr] | ^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: the item `Display` is imported redundantly [INFO] [stderr] --> src/main.rs:127:37 [INFO] [stderr] | [INFO] [stderr] 8 | use std::fmt::{Display, Formatter}; [INFO] [stderr] | ------- the item `Display` is already imported here [INFO] [stderr] ... [INFO] [stderr] 127 | use std::fmt::{self, Formatter, Display}; [INFO] [stderr] | ^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused import: `Work::*` [INFO] [stderr] --> src/main.rs:312:9 [INFO] [stderr] | [INFO] [stderr] 312 | use Work::*; [INFO] [stderr] | ^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: the item `From` is imported redundantly [INFO] [stderr] --> src/main.rs:340:9 [INFO] [stderr] | [INFO] [stderr] 340 | use std::convert::From; [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: the item `ToString` is imported redundantly [INFO] [stderr] --> src/main.rs:361:9 [INFO] [stderr] | [INFO] [stderr] 361 | use std::string::ToString; [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused variable: `slice_arr` [INFO] [stderr] --> src/main.rs:238:9 [INFO] [stderr] | [INFO] [stderr] 238 | let slice_arr = &_s; [INFO] [stderr] | ^^^^^^^^^ help: consider prefixing with an underscore: `_slice_arr` [INFO] [stderr] | [INFO] [stderr] = note: #[warn(unused_variables)] on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `slice_arr` [INFO] [stderr] --> src/main.rs:241:9 [INFO] [stderr] | [INFO] [stderr] 241 | let slice_arr = &[1, 2, 3, 4, 5]; [INFO] [stderr] | ^^^^^^^^^ help: consider prefixing with an underscore: `_slice_arr` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `slice_arr` [INFO] [stderr] --> src/main.rs:243:9 [INFO] [stderr] | [INFO] [stderr] 243 | let slice_arr = &mut [1, 2, 3, 4, 5]; [INFO] [stderr] | ^^^^^^^^^ help: consider prefixing with an underscore: `_slice_arr` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `decimal_f64` [INFO] [stderr] --> src/main.rs:332:9 [INFO] [stderr] | [INFO] [stderr] 332 | let decimal_f64 = decimal as f64; [INFO] [stderr] | ^^^^^^^^^^^ help: consider prefixing with an underscore: `_decimal_f64` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `my_string` [INFO] [stderr] --> src/main.rs:338:9 [INFO] [stderr] | [INFO] [stderr] 338 | let my_string = String::from(my_str); [INFO] [stderr] | ^^^^^^^^^ help: consider prefixing with an underscore: `_my_string` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `parsed_int` [INFO] [stderr] --> src/main.rs:376:9 [INFO] [stderr] | [INFO] [stderr] 376 | let parsed_int: i32 = "5".parse().unwrap(); [INFO] [stderr] | ^^^^^^^^^^ help: consider prefixing with an underscore: `_parsed_int` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `turbo_parsed` [INFO] [stderr] --> src/main.rs:377:9 [INFO] [stderr] | [INFO] [stderr] 377 | let turbo_parsed = "10".parse::().unwrap(); [INFO] [stderr] | ^^^^^^^^^^^^ help: consider prefixing with an underscore: `_turbo_parsed` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `float_parsed` [INFO] [stderr] --> src/main.rs:378:9 [INFO] [stderr] | [INFO] [stderr] 378 | let float_parsed = "10".parse::().unwrap(); [INFO] [stderr] | ^^^^^^^^^^^^ help: consider prefixing with an underscore: `_float_parsed` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `letter` [INFO] [stderr] --> src/main.rs:434:9 [INFO] [stderr] | [INFO] [stderr] 434 | let letter: Option = None; [INFO] [stderr] | ^^^^^^ help: consider prefixing with an underscore: `_letter` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `emoticon` [INFO] [stderr] --> src/main.rs:435:9 [INFO] [stderr] | [INFO] [stderr] 435 | let emoticon: Option = None; [INFO] [stderr] | ^^^^^^^^ help: consider prefixing with an underscore: `_emoticon` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `s_meter` [INFO] [stderr] --> src/practice_57/practice07.rs:21:9 [INFO] [stderr] | [INFO] [stderr] 21 | let s_meter = length as f64 * 0.3048 * width as f64 * 0.3048; [INFO] [stderr] | ^^^^^^^ help: consider prefixing with an underscore: `_s_meter` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/practice_57/practice03.rs:26:9 [INFO] [stderr] | [INFO] [stderr] 26 | let mut sentence = &[person, " says, \"", quote, "\""].concat(); [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/practice_57/practice05.rs:4:9 [INFO] [stderr] | [INFO] [stderr] 4 | let mut num1: i32; [INFO] [stderr] | ----^^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/practice_57/practice05.rs:5:9 [INFO] [stderr] | [INFO] [stderr] 5 | let mut num2: i32; [INFO] [stderr] | ----^^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] [INFO] [stderr] warning: function is never used: `count_str` [INFO] [stderr] --> src/practice_57/practice02.rs:17:1 [INFO] [stderr] | [INFO] [stderr] 17 | pub fn count_str() { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: #[warn(dead_code)] on by default [INFO] [stderr] [INFO] [stderr] warning: function is never used: `use_quote` [INFO] [stderr] --> src/practice_57/practice03.rs:6:1 [INFO] [stderr] | [INFO] [stderr] 6 | pub fn use_quote() { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `fill_sentence` [INFO] [stderr] --> src/practice_57/practice04.rs:1:1 [INFO] [stderr] | [INFO] [stderr] 1 | pub fn fill_sentence() {} [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `calculate` [INFO] [stderr] --> src/practice_57/practice05.rs:3:1 [INFO] [stderr] | [INFO] [stderr] 3 | pub fn calculate() { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `calculate_retiration` [INFO] [stderr] --> src/practice_57/practice06.rs:7:1 [INFO] [stderr] | [INFO] [stderr] 7 | pub fn calculate_retiration() { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `rectangle` [INFO] [stderr] --> src/practice_57/practice07.rs:4:1 [INFO] [stderr] | [INFO] [stderr] 4 | pub fn rectangle() { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `bubble_sort` [INFO] [stderr] --> src/main.rs:20:1 [INFO] [stderr] | [INFO] [stderr] 20 | fn bubble_sort(slice: &mut Vec) -> Vec { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `num` [INFO] [stderr] --> src/main.rs:60:1 [INFO] [stderr] | [INFO] [stderr] 60 | fn num() { [INFO] [stderr] | ^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `debug_practice` [INFO] [stderr] --> src/main.rs:93:1 [INFO] [stderr] | [INFO] [stderr] 93 | fn debug_practice() { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `display_practice` [INFO] [stderr] --> src/main.rs:108:1 [INFO] [stderr] | [INFO] [stderr] 108 | fn display_practice() { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `formatting` [INFO] [stderr] --> src/main.rs:126:1 [INFO] [stderr] | [INFO] [stderr] 126 | fn formatting() { [INFO] [stderr] | ^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `tuple_practice` [INFO] [stderr] --> src/main.rs:149:1 [INFO] [stderr] | [INFO] [stderr] 149 | fn tuple_practice() { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `sequences` [INFO] [stderr] --> src/main.rs:179:1 [INFO] [stderr] | [INFO] [stderr] 179 | fn sequences() { [INFO] [stderr] | ^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `enums_practices` [INFO] [stderr] --> src/main.rs:268:1 [INFO] [stderr] | [INFO] [stderr] 268 | fn enums_practices() { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `conversion_practice` [INFO] [stderr] --> src/main.rs:323:1 [INFO] [stderr] | [INFO] [stderr] 323 | fn conversion_practice() { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `lambda_practice` [INFO] [stderr] --> src/main.rs:394:1 [INFO] [stderr] | [INFO] [stderr] 394 | fn lambda_practice() { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `assign_practice` [INFO] [stderr] --> src/main.rs:432:1 [INFO] [stderr] | [INFO] [stderr] 432 | fn assign_practice() { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: constant `trans` should have an upper case name [INFO] [stderr] --> src/practice_57/practice07.rs:7:11 [INFO] [stderr] | [INFO] [stderr] 7 | const trans: f64 = 0.09290304; [INFO] [stderr] | ^^^^^ help: convert the identifier to upper case: `TRANS` [INFO] [stderr] | [INFO] [stderr] = note: #[warn(non_upper_case_globals)] on by default [INFO] [stderr] [INFO] [stderr] warning: constant `pieces_per_pizza` should have an upper case name [INFO] [stderr] --> src/practice_57/practice08.rs:6:11 [INFO] [stderr] | [INFO] [stderr] 6 | const pieces_per_pizza: i32 = 8; [INFO] [stderr] | ^^^^^^^^^^^^^^^^ help: convert the identifier to upper case: `PIECES_PER_PIZZA` [INFO] [stderr] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 1.68s [INFO] running `"docker" "inspect" "494aa864e00b4bf7367c8bbac46ff19db5849dcf881231ed67305c523aa52b3e"` [INFO] running `"docker" "rm" "-f" "494aa864e00b4bf7367c8bbac46ff19db5849dcf881231ed67305c523aa52b3e"` [INFO] [stdout] 494aa864e00b4bf7367c8bbac46ff19db5849dcf881231ed67305c523aa52b3e [INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/LImoritakeU/rust_playgroud:/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=warn" "-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" "+1.37.0" "test" "--frozen" "--no-run"` [INFO] [stdout] 97d9058b150b41b611be529c04cf501d3d23db8f7d55f4c6d81246fbe2d38954 [INFO] running `"docker" "start" "-a" "97d9058b150b41b611be529c04cf501d3d23db8f7d55f4c6d81246fbe2d38954"` [INFO] [stderr] Compiling playground v0.1.0 (/opt/crater/workdir) [INFO] [stderr] warning: unused doc comment [INFO] [stderr] --> src/main.rs:180:5 [INFO] [stderr] | [INFO] [stderr] 180 | /// Array, Vector, and Slice [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] 181 | // new array [INFO] [stderr] 182 | let arr = ["eins", "zwei"]; [INFO] [stderr] | --------------------------- rustdoc does not generate documentation for statements [INFO] [stderr] | [INFO] [stderr] = note: #[warn(unused_doc_comments)] on by default [INFO] [stderr] [INFO] [stderr] warning: unused import: `std::intrinsics::write_bytes` [INFO] [stderr] --> src/main.rs:7:5 [INFO] [stderr] | [INFO] [stderr] 7 | use std::intrinsics::write_bytes; [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: #[warn(unused_imports)] on by default [INFO] [stderr] [INFO] [stderr] warning: unused import: `stdin` [INFO] [stderr] --> src/practice_57/practice07.rs:1:28 [INFO] [stderr] | [INFO] [stderr] 1 | use std::io::{self, Write, stdin}; [INFO] [stderr] | ^^^^^ [INFO] [stderr] [INFO] [stderr] warning: the item `Formatter` is imported redundantly [INFO] [stderr] --> src/main.rs:127:26 [INFO] [stderr] | [INFO] [stderr] 8 | use std::fmt::{Display, Formatter}; [INFO] [stderr] | --------- the item `Formatter` is already imported here [INFO] [stderr] ... [INFO] [stderr] 127 | use std::fmt::{self, Formatter, Display}; [INFO] [stderr] | ^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: the item `Display` is imported redundantly [INFO] [stderr] --> src/main.rs:127:37 [INFO] [stderr] | [INFO] [stderr] 8 | use std::fmt::{Display, Formatter}; [INFO] [stderr] | ------- the item `Display` is already imported here [INFO] [stderr] ... [INFO] [stderr] 127 | use std::fmt::{self, Formatter, Display}; [INFO] [stderr] | ^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused import: `Work::*` [INFO] [stderr] --> src/main.rs:312:9 [INFO] [stderr] | [INFO] [stderr] 312 | use Work::*; [INFO] [stderr] | ^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: the item `From` is imported redundantly [INFO] [stderr] --> src/main.rs:340:9 [INFO] [stderr] | [INFO] [stderr] 340 | use std::convert::From; [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: the item `ToString` is imported redundantly [INFO] [stderr] --> src/main.rs:361:9 [INFO] [stderr] | [INFO] [stderr] 361 | use std::string::ToString; [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused variable: `slice_arr` [INFO] [stderr] --> src/main.rs:238:9 [INFO] [stderr] | [INFO] [stderr] 238 | let slice_arr = &_s; [INFO] [stderr] | ^^^^^^^^^ help: consider prefixing with an underscore: `_slice_arr` [INFO] [stderr] | [INFO] [stderr] = note: #[warn(unused_variables)] on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `slice_arr` [INFO] [stderr] --> src/main.rs:241:9 [INFO] [stderr] | [INFO] [stderr] 241 | let slice_arr = &[1, 2, 3, 4, 5]; [INFO] [stderr] | ^^^^^^^^^ help: consider prefixing with an underscore: `_slice_arr` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `slice_arr` [INFO] [stderr] --> src/main.rs:243:9 [INFO] [stderr] | [INFO] [stderr] 243 | let slice_arr = &mut [1, 2, 3, 4, 5]; [INFO] [stderr] | ^^^^^^^^^ help: consider prefixing with an underscore: `_slice_arr` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `decimal_f64` [INFO] [stderr] --> src/main.rs:332:9 [INFO] [stderr] | [INFO] [stderr] 332 | let decimal_f64 = decimal as f64; [INFO] [stderr] | ^^^^^^^^^^^ help: consider prefixing with an underscore: `_decimal_f64` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `my_string` [INFO] [stderr] --> src/main.rs:338:9 [INFO] [stderr] | [INFO] [stderr] 338 | let my_string = String::from(my_str); [INFO] [stderr] | ^^^^^^^^^ help: consider prefixing with an underscore: `_my_string` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `parsed_int` [INFO] [stderr] --> src/main.rs:376:9 [INFO] [stderr] | [INFO] [stderr] 376 | let parsed_int: i32 = "5".parse().unwrap(); [INFO] [stderr] | ^^^^^^^^^^ help: consider prefixing with an underscore: `_parsed_int` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `turbo_parsed` [INFO] [stderr] --> src/main.rs:377:9 [INFO] [stderr] | [INFO] [stderr] 377 | let turbo_parsed = "10".parse::().unwrap(); [INFO] [stderr] | ^^^^^^^^^^^^ help: consider prefixing with an underscore: `_turbo_parsed` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `float_parsed` [INFO] [stderr] --> src/main.rs:378:9 [INFO] [stderr] | [INFO] [stderr] 378 | let float_parsed = "10".parse::().unwrap(); [INFO] [stderr] | ^^^^^^^^^^^^ help: consider prefixing with an underscore: `_float_parsed` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `letter` [INFO] [stderr] --> src/main.rs:434:9 [INFO] [stderr] | [INFO] [stderr] 434 | let letter: Option = None; [INFO] [stderr] | ^^^^^^ help: consider prefixing with an underscore: `_letter` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `emoticon` [INFO] [stderr] --> src/main.rs:435:9 [INFO] [stderr] | [INFO] [stderr] 435 | let emoticon: Option = None; [INFO] [stderr] | ^^^^^^^^ help: consider prefixing with an underscore: `_emoticon` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `s_meter` [INFO] [stderr] --> src/practice_57/practice07.rs:21:9 [INFO] [stderr] | [INFO] [stderr] 21 | let s_meter = length as f64 * 0.3048 * width as f64 * 0.3048; [INFO] [stderr] | ^^^^^^^ help: consider prefixing with an underscore: `_s_meter` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/practice_57/practice03.rs:26:9 [INFO] [stderr] | [INFO] [stderr] 26 | let mut sentence = &[person, " says, \"", quote, "\""].concat(); [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/practice_57/practice05.rs:4:9 [INFO] [stderr] | [INFO] [stderr] 4 | let mut num1: i32; [INFO] [stderr] | ----^^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/practice_57/practice05.rs:5:9 [INFO] [stderr] | [INFO] [stderr] 5 | let mut num2: i32; [INFO] [stderr] | ----^^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] [INFO] [stderr] warning: function is never used: `count_str` [INFO] [stderr] --> src/practice_57/practice02.rs:17:1 [INFO] [stderr] | [INFO] [stderr] 17 | pub fn count_str() { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: #[warn(dead_code)] on by default [INFO] [stderr] [INFO] [stderr] warning: function is never used: `use_quote` [INFO] [stderr] --> src/practice_57/practice03.rs:6:1 [INFO] [stderr] | [INFO] [stderr] 6 | pub fn use_quote() { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `fill_sentence` [INFO] [stderr] --> src/practice_57/practice04.rs:1:1 [INFO] [stderr] | [INFO] [stderr] 1 | pub fn fill_sentence() {} [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `calculate` [INFO] [stderr] --> src/practice_57/practice05.rs:3:1 [INFO] [stderr] | [INFO] [stderr] 3 | pub fn calculate() { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `calculate_retiration` [INFO] [stderr] --> src/practice_57/practice06.rs:7:1 [INFO] [stderr] | [INFO] [stderr] 7 | pub fn calculate_retiration() { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `rectangle` [INFO] [stderr] --> src/practice_57/practice07.rs:4:1 [INFO] [stderr] | [INFO] [stderr] 4 | pub fn rectangle() { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `bubble_sort` [INFO] [stderr] --> src/main.rs:20:1 [INFO] [stderr] | [INFO] [stderr] 20 | fn bubble_sort(slice: &mut Vec) -> Vec { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `num` [INFO] [stderr] --> src/main.rs:60:1 [INFO] [stderr] | [INFO] [stderr] 60 | fn num() { [INFO] [stderr] | ^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `debug_practice` [INFO] [stderr] --> src/main.rs:93:1 [INFO] [stderr] | [INFO] [stderr] 93 | fn debug_practice() { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `display_practice` [INFO] [stderr] --> src/main.rs:108:1 [INFO] [stderr] | [INFO] [stderr] 108 | fn display_practice() { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `formatting` [INFO] [stderr] --> src/main.rs:126:1 [INFO] [stderr] | [INFO] [stderr] 126 | fn formatting() { [INFO] [stderr] | ^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `tuple_practice` [INFO] [stderr] --> src/main.rs:149:1 [INFO] [stderr] | [INFO] [stderr] 149 | fn tuple_practice() { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `sequences` [INFO] [stderr] --> src/main.rs:179:1 [INFO] [stderr] | [INFO] [stderr] 179 | fn sequences() { [INFO] [stderr] | ^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `enums_practices` [INFO] [stderr] --> src/main.rs:268:1 [INFO] [stderr] | [INFO] [stderr] 268 | fn enums_practices() { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `conversion_practice` [INFO] [stderr] --> src/main.rs:323:1 [INFO] [stderr] | [INFO] [stderr] 323 | fn conversion_practice() { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `lambda_practice` [INFO] [stderr] --> src/main.rs:394:1 [INFO] [stderr] | [INFO] [stderr] 394 | fn lambda_practice() { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `assign_practice` [INFO] [stderr] --> src/main.rs:432:1 [INFO] [stderr] | [INFO] [stderr] 432 | fn assign_practice() { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: constant `trans` should have an upper case name [INFO] [stderr] --> src/practice_57/practice07.rs:7:11 [INFO] [stderr] | [INFO] [stderr] 7 | const trans: f64 = 0.09290304; [INFO] [stderr] | ^^^^^ help: convert the identifier to upper case: `TRANS` [INFO] [stderr] | [INFO] [stderr] = note: #[warn(non_upper_case_globals)] on by default [INFO] [stderr] [INFO] [stderr] warning: constant `pieces_per_pizza` should have an upper case name [INFO] [stderr] --> src/practice_57/practice08.rs:6:11 [INFO] [stderr] | [INFO] [stderr] 6 | const pieces_per_pizza: i32 = 8; [INFO] [stderr] | ^^^^^^^^^^^^^^^^ help: convert the identifier to upper case: `PIECES_PER_PIZZA` [INFO] [stderr] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 1.22s [INFO] running `"docker" "inspect" "97d9058b150b41b611be529c04cf501d3d23db8f7d55f4c6d81246fbe2d38954"` [INFO] running `"docker" "rm" "-f" "97d9058b150b41b611be529c04cf501d3d23db8f7d55f4c6d81246fbe2d38954"` [INFO] [stdout] 97d9058b150b41b611be529c04cf501d3d23db8f7d55f4c6d81246fbe2d38954 [INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/LImoritakeU/rust_playgroud:/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=warn" "-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" "+1.37.0" "test" "--frozen"` [INFO] [stdout] 597fad3fdca21ed63e935347a6992db08b5dbf91ba3f24eb2aac7697bb611db3 [INFO] running `"docker" "start" "-a" "597fad3fdca21ed63e935347a6992db08b5dbf91ba3f24eb2aac7697bb611db3"` [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 0.06s [INFO] [stderr] Running /opt/crater/target/debug/deps/playground-e474cc30c1c90ad4 [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 `"docker" "inspect" "597fad3fdca21ed63e935347a6992db08b5dbf91ba3f24eb2aac7697bb611db3"` [INFO] running `"docker" "rm" "-f" "597fad3fdca21ed63e935347a6992db08b5dbf91ba3f24eb2aac7697bb611db3"` [INFO] [stdout] 597fad3fdca21ed63e935347a6992db08b5dbf91ba3f24eb2aac7697bb611db3