[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/pr-60039-1/sources/master#e305df1846a6d985315917ae0c81b74af8b4e641/gh/LImoritakeU/rust_playgroud"`
[INFO] [stderr] Cloning into 'work/ex/pr-60039-1/sources/master#e305df1846a6d985315917ae0c81b74af8b4e641/gh/LImoritakeU/rust_playgroud'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/LImoritakeU/rust_playgroud" "work/ex/pr-60039-1/sources/try#99a7498759a22b5684caf798a98b7e90ad9d2443/gh/LImoritakeU/rust_playgroud"`
[INFO] [stderr] Cloning into 'work/ex/pr-60039-1/sources/try#99a7498759a22b5684caf798a98b7e90ad9d2443/gh/LImoritakeU/rust_playgroud'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] a8f76c123c5d68165a4b23876efdbbf823873f2f
[INFO] sha for GitHub repo LImoritakeU/rust_playgroud: a8f76c123c5d68165a4b23876efdbbf823873f2f
[INFO] validating manifest of LImoritakeU/rust_playgroud on toolchain master#e305df1846a6d985315917ae0c81b74af8b4e641
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e305df1846a6d985315917ae0c81b74af8b4e641-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of LImoritakeU/rust_playgroud on toolchain try#99a7498759a22b5684caf798a98b7e90ad9d2443
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+99a7498759a22b5684caf798a98b7e90ad9d2443-alt" "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/pr-60039-1/sources/master#e305df1846a6d985315917ae0c81b74af8b4e641/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/pr-60039-1/sources/try#99a7498759a22b5684caf798a98b7e90ad9d2443/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" "+e305df1846a6d985315917ae0c81b74af8b4e641-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+99a7498759a22b5684caf798a98b7e90ad9d2443-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking LImoritakeU/rust_playgroud against master#e305df1846a6d985315917ae0c81b74af8b4e641 for pr-60039-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-60039-1/worker-0/master#e305df1846a6d985315917ae0c81b74af8b4e641:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-60039-1/sources/master#e305df1846a6d985315917ae0c81b74af8b4e641/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=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" "+e305df1846a6d985315917ae0c81b74af8b4e641-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 41933e2eefdf6521424b86005407acbd7d6128edc8dec3ec8ddb95d647006cdd
[INFO] running `"docker" "start" "-a" "41933e2eefdf6521424b86005407acbd7d6128edc8dec3ec8ddb95d647006cdd"`
[INFO] [stderr]     Checking playground v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]    --> src/main.rs:131:5
[INFO] [stderr]     |
[INFO] [stderr] 131 |     /// Array, Vector, and Slice
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 132 |     // new array
[INFO] [stderr] 133 |     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 doc comment
[INFO] [stderr]    --> src/main.rs:131:5
[INFO] [stderr]     |
[INFO] [stderr] 131 |     /// Array, Vector, and Slice
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 132 |     // new array
[INFO] [stderr] 133 |     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:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::intrinsics::write_bytes;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: the item `Formatter` is imported redundantly
[INFO] [stderr]   --> src/main.rs:78:26
[INFO] [stderr]    |
[INFO] [stderr] 5  | use std::fmt::{Display, Formatter};
[INFO] [stderr]    |                         --------- the item `Formatter` is already imported here
[INFO] [stderr] ...
[INFO] [stderr] 78 |     use std::fmt::{self, Formatter, Display};
[INFO] [stderr]    |                          ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the item `Display` is imported redundantly
[INFO] [stderr]   --> src/main.rs:78:37
[INFO] [stderr]    |
[INFO] [stderr] 5  | use std::fmt::{Display, Formatter};
[INFO] [stderr]    |                ------- the item `Display` is already imported here
[INFO] [stderr] ...
[INFO] [stderr] 78 |     use std::fmt::{self, Formatter, Display};
[INFO] [stderr]    |                                     ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Work::*`
[INFO] [stderr]    --> src/main.rs:242:9
[INFO] [stderr]     |
[INFO] [stderr] 242 |     use Work::*;
[INFO] [stderr]     |         ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the item `From` is imported redundantly
[INFO] [stderr]    --> src/main.rs:272:9
[INFO] [stderr]     |
[INFO] [stderr] 272 |     use std::convert::From;
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the item `ToString` is imported redundantly
[INFO] [stderr]    --> src/main.rs:293:9
[INFO] [stderr]     |
[INFO] [stderr] 293 |     use std::string::ToString;
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::intrinsics::write_bytes`
[INFO] [stderr]  --> src/main.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::intrinsics::write_bytes;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: the item `Formatter` is imported redundantly
[INFO] [stderr]   --> src/main.rs:78:26
[INFO] [stderr]    |
[INFO] [stderr] 5  | use std::fmt::{Display, Formatter};
[INFO] [stderr]    |                         --------- the item `Formatter` is already imported here
[INFO] [stderr] ...
[INFO] [stderr] 78 |     use std::fmt::{self, Formatter, Display};
[INFO] [stderr]    |                          ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the item `Display` is imported redundantly
[INFO] [stderr]   --> src/main.rs:78:37
[INFO] [stderr]    |
[INFO] [stderr] 5  | use std::fmt::{Display, Formatter};
[INFO] [stderr]    |                ------- the item `Display` is already imported here
[INFO] [stderr] ...
[INFO] [stderr] 78 |     use std::fmt::{self, Formatter, Display};
[INFO] [stderr]    |                                     ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Work::*`
[INFO] [stderr]    --> src/main.rs:242:9
[INFO] [stderr]     |
[INFO] [stderr] 242 |     use Work::*;
[INFO] [stderr]     |         ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the item `From` is imported redundantly
[INFO] [stderr]    --> src/main.rs:272:9
[INFO] [stderr]     |
[INFO] [stderr] 272 |     use std::convert::From;
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the item `ToString` is imported redundantly
[INFO] [stderr]    --> src/main.rs:293:9
[INFO] [stderr]     |
[INFO] [stderr] 293 |     use std::string::ToString;
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `decimal_f64`
[INFO] [stderr]    --> src/main.rs:264:9
[INFO] [stderr]     |
[INFO] [stderr] 264 |     let decimal_f64 = decimal as f64;
[INFO] [stderr]     |         ^^^^^^^^^^^ help: consider prefixing with an underscore: `_decimal_f64`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `my_string`
[INFO] [stderr]    --> src/main.rs:270:9
[INFO] [stderr]     |
[INFO] [stderr] 270 |     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:308:9
[INFO] [stderr]     |
[INFO] [stderr] 308 |     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:309:9
[INFO] [stderr]     |
[INFO] [stderr] 309 |     let turbo_parsed = "10".parse::<i32>().unwrap();
[INFO] [stderr]     |         ^^^^^^^^^^^^ help: consider prefixing with an underscore: `_turbo_parsed`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `letter`
[INFO] [stderr]    --> src/main.rs:318:9
[INFO] [stderr]     |
[INFO] [stderr] 318 |     let letter: Option<i32> = None;
[INFO] [stderr]     |         ^^^^^^ help: consider prefixing with an underscore: `_letter`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `emoticon`
[INFO] [stderr]    --> src/main.rs:319:9
[INFO] [stderr]     |
[INFO] [stderr] 319 |     let emoticon: Option<i32> = None;
[INFO] [stderr]     |         ^^^^^^^^ help: consider prefixing with an underscore: `_emoticon`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `decimal_f64`
[INFO] [stderr]    --> src/main.rs:264:9
[INFO] [stderr]     |
[INFO] [stderr] 264 |     let decimal_f64 = decimal as f64;
[INFO] [stderr]     |         ^^^^^^^^^^^ help: consider prefixing with an underscore: `_decimal_f64`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `my_string`
[INFO] [stderr]    --> src/main.rs:270:9
[INFO] [stderr]     |
[INFO] [stderr] 270 |     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:308:9
[INFO] [stderr]     |
[INFO] [stderr] 308 |     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:309:9
[INFO] [stderr]     |
[INFO] [stderr] 309 |     let turbo_parsed = "10".parse::<i32>().unwrap();
[INFO] [stderr]     |         ^^^^^^^^^^^^ help: consider prefixing with an underscore: `_turbo_parsed`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `letter`
[INFO] [stderr]    --> src/main.rs:318:9
[INFO] [stderr]     |
[INFO] [stderr] 318 |     let letter: Option<i32> = None;
[INFO] [stderr]     |         ^^^^^^ help: consider prefixing with an underscore: `_letter`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `emoticon`
[INFO] [stderr]    --> src/main.rs:319:9
[INFO] [stderr]     |
[INFO] [stderr] 319 |     let emoticon: Option<i32> = None;
[INFO] [stderr]     |         ^^^^^^^^ help: consider prefixing with an underscore: `_emoticon`
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `num`
[INFO] [stderr]   --> src/main.rs:19:1
[INFO] [stderr]    |
[INFO] [stderr] 19 | fn num() {
[INFO] [stderr]    | ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `debug_practice`
[INFO] [stderr]   --> src/main.rs:44:1
[INFO] [stderr]    |
[INFO] [stderr] 44 | fn debug_practice() {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `display_practice`
[INFO] [stderr]   --> src/main.rs:59:1
[INFO] [stderr]    |
[INFO] [stderr] 59 | fn display_practice() {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `formatting`
[INFO] [stderr]   --> src/main.rs:77:1
[INFO] [stderr]    |
[INFO] [stderr] 77 | fn formatting() {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `tuple_practice`
[INFO] [stderr]    --> src/main.rs:100:1
[INFO] [stderr]     |
[INFO] [stderr] 100 | fn tuple_practice() {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `sequences`
[INFO] [stderr]    --> src/main.rs:130:1
[INFO] [stderr]     |
[INFO] [stderr] 130 | fn sequences() {
[INFO] [stderr]     | ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `enums_practices`
[INFO] [stderr]    --> src/main.rs:198:1
[INFO] [stderr]     |
[INFO] [stderr] 198 | fn enums_practices() {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `conversion_practice`
[INFO] [stderr]    --> src/main.rs:254:1
[INFO] [stderr]     |
[INFO] [stderr] 254 | fn conversion_practice () {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `num`
[INFO] [stderr]   --> src/main.rs:19:1
[INFO] [stderr]    |
[INFO] [stderr] 19 | fn num() {
[INFO] [stderr]    | ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `debug_practice`
[INFO] [stderr]   --> src/main.rs:44:1
[INFO] [stderr]    |
[INFO] [stderr] 44 | fn debug_practice() {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `display_practice`
[INFO] [stderr]   --> src/main.rs:59:1
[INFO] [stderr]    |
[INFO] [stderr] 59 | fn display_practice() {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `formatting`
[INFO] [stderr]   --> src/main.rs:77:1
[INFO] [stderr]    |
[INFO] [stderr] 77 | fn formatting() {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `tuple_practice`
[INFO] [stderr]    --> src/main.rs:100:1
[INFO] [stderr]     |
[INFO] [stderr] 100 | fn tuple_practice() {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `sequences`
[INFO] [stderr]    --> src/main.rs:130:1
[INFO] [stderr]     |
[INFO] [stderr] 130 | fn sequences() {
[INFO] [stderr]     | ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `enums_practices`
[INFO] [stderr]    --> src/main.rs:198:1
[INFO] [stderr]     |
[INFO] [stderr] 198 | fn enums_practices() {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `conversion_practice`
[INFO] [stderr]    --> src/main.rs:254:1
[INFO] [stderr]     |
[INFO] [stderr] 254 | fn conversion_practice () {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.79s
[INFO] running `"docker" "inspect" "41933e2eefdf6521424b86005407acbd7d6128edc8dec3ec8ddb95d647006cdd"`
[INFO] running `"docker" "rm" "-f" "41933e2eefdf6521424b86005407acbd7d6128edc8dec3ec8ddb95d647006cdd"`
[INFO] [stdout] 41933e2eefdf6521424b86005407acbd7d6128edc8dec3ec8ddb95d647006cdd