Dec 17 11:34:44.710 INFO checking yagince/programming-rust against try#0b8c5828f68d7b2840b81fa51239346dc97fef5a for pr-54252
Dec 17 11:34:44.710 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-0/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a/gh/yagince/programming-rust:/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" "+0b8c5828f68d7b2840b81fa51239346dc97fef5a-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 17 11:34:45.245 INFO [stdout] 704fba6be123dd2dcc8f385da4d71e137d36b843a072e3a84a515d1cba69214e
Dec 17 11:34:45.247 INFO running `"docker" "start" "-a" "704fba6be123dd2dcc8f385da4d71e137d36b843a072e3a84a515d1cba69214e"`
Dec 17 11:34:48.177 INFO [stderr]     Checking samples v0.1.0 (/opt/crater/workdir)
Dec 17 11:34:48.536 INFO [stderr] warning: unused import: `std::io::Result`
Dec 17 11:34:48.537 INFO [stderr]  --> src/bin/6_4_1_if_let.rs:2:5
Dec 17 11:34:48.537 INFO [stderr]   |
Dec 17 11:34:48.537 INFO [stderr] 2 | use std::io::Result;
Dec 17 11:34:48.538 INFO [stderr]   |     ^^^^^^^^^^^^^^^
Dec 17 11:34:48.538 INFO [stderr]   |
Dec 17 11:34:48.538 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 17 11:34:48.538 INFO [stderr] 
Dec 17 11:34:49.008 INFO [stderr] warning: unused variable: `a_2`
Dec 17 11:34:49.009 INFO [stderr]  --> src/bin/4_3_copy.rs:6:9
Dec 17 11:34:49.009 INFO [stderr]   |
Dec 17 11:34:49.009 INFO [stderr] 6 |     let a_2 = a;
Dec 17 11:34:49.009 INFO [stderr]   |         ^^^ help: consider using `_a_2` instead
Dec 17 11:34:49.024 INFO [stderr]   |
Dec 17 11:34:49.025 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Dec 17 11:34:49.025 INFO [stderr] 
Dec 17 11:34:49.128 INFO [stderr] warning: unused variable: `t`
Dec 17 11:34:49.129 INFO [stderr]  --> src/bin/4_4_rc_arc.rs:9:9
Dec 17 11:34:49.129 INFO [stderr]   |
Dec 17 11:34:49.129 INFO [stderr] 9 |     let t = s.clone(); // cloneすると参照カウントがインクリメントされるが実際はコピーされない
Dec 17 11:34:49.129 INFO [stderr]   |         ^ help: consider using `_t` instead
Dec 17 11:34:49.130 INFO [stderr]   |
Dec 17 11:34:49.130 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Dec 17 11:34:49.130 INFO [stderr] 
Dec 17 11:34:49.130 INFO [stderr] warning: unused variable: `u`
Dec 17 11:34:49.131 INFO [stderr]   --> src/bin/4_4_rc_arc.rs:10:9
Dec 17 11:34:49.131 INFO [stderr]    |
Dec 17 11:34:49.131 INFO [stderr] 10 |     let u = s.clone();
Dec 17 11:34:49.131 INFO [stderr]    |         ^ help: consider using `_u` instead
Dec 17 11:34:49.132 INFO [stderr] 
Dec 17 11:34:49.196 INFO [stderr] warning: variable does not need to be mutable
Dec 17 11:34:49.197 INFO [stderr]  --> src/bin/4_4_rc_arc.rs:7:9
Dec 17 11:34:49.197 INFO [stderr]   |
Dec 17 11:34:49.197 INFO [stderr] 7 |     let mut s = Rc::new("hoge".to_string());
Dec 17 11:34:49.197 INFO [stderr]   |         ----^
Dec 17 11:34:49.197 INFO [stderr]   |         |
Dec 17 11:34:49.197 INFO [stderr]   |         help: remove this `mut`
Dec 17 11:34:49.198 INFO [stderr]   |
Dec 17 11:34:49.198 INFO [stderr]   = note: #[warn(unused_mut)] on by default
Dec 17 11:34:49.198 INFO [stderr] 
Dec 17 11:34:49.258 INFO [stderr] warning: unused variable: `t`
Dec 17 11:34:49.259 INFO [stderr]  --> src/bin/4_4_rc_arc.rs:9:9
Dec 17 11:34:49.259 INFO [stderr]   |
Dec 17 11:34:49.259 INFO [stderr] 9 |     let t = s.clone(); // cloneすると参照カウントがインクリメントされるが実際はコピーされない
Dec 17 11:34:49.259 INFO [stderr]   |         ^ help: consider using `_t` instead
Dec 17 11:34:49.272 INFO [stderr]   |
Dec 17 11:34:49.274 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Dec 17 11:34:49.274 INFO [stderr] 
Dec 17 11:34:49.275 INFO [stderr] warning: unused variable: `u`
Dec 17 11:34:49.275 INFO [stderr]   --> src/bin/4_4_rc_arc.rs:10:9
Dec 17 11:34:49.275 INFO [stderr]    |
Dec 17 11:34:49.275 INFO [stderr] 10 |     let u = s.clone();
Dec 17 11:34:49.275 INFO [stderr]    |         ^ help: consider using `_u` instead
Dec 17 11:34:49.275 INFO [stderr] 
Dec 17 11:34:49.279 INFO [stderr] warning: variable does not need to be mutable
Dec 17 11:34:49.279 INFO [stderr]  --> src/bin/4_4_rc_arc.rs:7:9
Dec 17 11:34:49.279 INFO [stderr]   |
Dec 17 11:34:49.279 INFO [stderr] 7 |     let mut s = Rc::new("hoge".to_string());
Dec 17 11:34:49.279 INFO [stderr]   |         ----^
Dec 17 11:34:49.279 INFO [stderr]   |         |
Dec 17 11:34:49.280 INFO [stderr]   |         help: remove this `mut`
Dec 17 11:34:49.332 INFO [stderr]   |
Dec 17 11:34:49.332 INFO [stderr]   = note: #[warn(unused_mut)] on by default
Dec 17 11:34:49.332 INFO [stderr] 
Dec 17 11:34:49.840 INFO [stderr] warning: unused import: `std::io::Result`
Dec 17 11:34:49.841 INFO [stderr]  --> src/bin/6_4_1_if_let.rs:2:5
Dec 17 11:34:49.841 INFO [stderr]   |
Dec 17 11:34:49.841 INFO [stderr] 2 | use std::io::Result;
Dec 17 11:34:49.841 INFO [stderr]   |     ^^^^^^^^^^^^^^^
Dec 17 11:34:49.841 INFO [stderr]   |
Dec 17 11:34:49.842 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 17 11:34:49.842 INFO [stderr] 
Dec 17 11:34:50.216 INFO [stderr] warning: unused variable: `aside`
Dec 17 11:34:50.216 INFO [stderr]   --> src/bin/5_3_share_refenrence.rs:11:9
Dec 17 11:34:50.217 INFO [stderr]    |
Dec 17 11:34:50.217 INFO [stderr] 11 |     let aside = v;
Dec 17 11:34:50.217 INFO [stderr]    |         ^^^^^ help: consider using `_aside` instead
Dec 17 11:34:50.217 INFO [stderr] warning: unused variable: `a_2`
Dec 17 11:34:50.217 INFO [stderr]  --> src/bin/4_3_copy.rs:6:9
Dec 17 11:34:50.217 INFO [stderr]   |
Dec 17 11:34:50.217 INFO [stderr] 6 |     let a_2 = a;
Dec 17 11:34:50.217 INFO [stderr]   |         ^^^ help: consider using `_a_2` instead
Dec 17 11:34:50.217 INFO [stderr]    |
Dec 17 11:34:50.217 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 17 11:34:50.217 INFO [stderr] 
Dec 17 11:34:50.217 INFO [stderr] warning: unused variable: `r1`
Dec 17 11:34:50.217 INFO [stderr]   --> src/bin/5_3_share_refenrence.rs:28:9
Dec 17 11:34:50.217 INFO [stderr]    |
Dec 17 11:34:50.217 INFO [stderr] 28 |     let r1 = &mut r.1; // 可変参照から可変参照の再借用は出来る
Dec 17 11:34:50.217 INFO [stderr]    |         ^^ help: consider using `_r1` instead
Dec 17 11:34:50.217 INFO [stderr] 
Dec 17 11:34:50.228 INFO [stderr]   |
Dec 17 11:34:50.228 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Dec 17 11:34:50.228 INFO [stderr] 
Dec 17 11:34:50.460 INFO [stderr] warning: field is never used: `y`
Dec 17 11:34:50.461 INFO [stderr]  --> src/bin/5_2_6_lifetime_parameter.rs:3:5
Dec 17 11:34:50.461 INFO [stderr]   |
Dec 17 11:34:50.461 INFO [stderr] 3 |     y: &'b i32,
Dec 17 11:34:50.462 INFO [stderr]   |     ^^^^^^^^^^
Dec 17 11:34:50.462 INFO [stderr]   |
Dec 17 11:34:50.462 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 17 11:34:50.463 INFO [stderr] 
Dec 17 11:34:50.956 INFO [stderr] warning: unused variable: `aside`
Dec 17 11:34:50.956 INFO [stderr]   --> src/bin/5_3_share_refenrence.rs:11:9
Dec 17 11:34:50.956 INFO [stderr]    |
Dec 17 11:34:50.956 INFO [stderr] 11 |     let aside = v;
Dec 17 11:34:50.956 INFO [stderr]    |         ^^^^^ help: consider using `_aside` instead
Dec 17 11:34:50.968 INFO [stderr]    |
Dec 17 11:34:50.968 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 17 11:34:50.968 INFO [stderr] 
Dec 17 11:34:50.968 INFO [stderr] warning: unused variable: `r1`
Dec 17 11:34:50.968 INFO [stderr]   --> src/bin/5_3_share_refenrence.rs:28:9
Dec 17 11:34:50.969 INFO [stderr]    |
Dec 17 11:34:50.969 INFO [stderr] 28 |     let r1 = &mut r.1; // 可変参照から可変参照の再借用は出来る
Dec 17 11:34:50.969 INFO [stderr]    |         ^^ help: consider using `_r1` instead
Dec 17 11:34:50.969 INFO [stderr] 
Dec 17 11:34:51.221 INFO [stderr] warning: field is never used: `y`
Dec 17 11:34:51.222 INFO [stderr]  --> src/bin/5_2_6_lifetime_parameter.rs:3:5
Dec 17 11:34:51.222 INFO [stderr]   |
Dec 17 11:34:51.222 INFO [stderr] 3 |     y: &'b i32,
Dec 17 11:34:51.222 INFO [stderr]   |     ^^^^^^^^^^
Dec 17 11:34:51.222 INFO [stderr]   |
Dec 17 11:34:51.222 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 17 11:34:51.222 INFO [stderr] 
Dec 17 11:34:51.384 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.25s
Dec 17 11:34:52.419 INFO running `"docker" "inspect" "704fba6be123dd2dcc8f385da4d71e137d36b843a072e3a84a515d1cba69214e"`
Dec 17 11:34:52.828 INFO running `"docker" "rm" "-f" "704fba6be123dd2dcc8f385da4d71e137d36b843a072e3a84a515d1cba69214e"`
Dec 17 11:34:53.191 INFO [stdout] 704fba6be123dd2dcc8f385da4d71e137d36b843a072e3a84a515d1cba69214e