Nov 27 18:19:22.099 INFO checking tperdue321/rust_ownership against master#0b9f19dff1347e29bf4362ab5a8fab84b43023b5 for pr-56074
Nov 27 18:19:22.099 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56074/worker-7/master#0b9f19dff1347e29bf4362ab5a8fab84b43023b5:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-7/pr-56074/master#0b9f19dff1347e29bf4362ab5a8fab84b43023b5:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +0b9f19dff1347e29bf4362ab5a8fab84b43023b5-alt check --frozen --all --all-targets" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Nov 27 18:19:22.461 INFO [stdout] 22c473b7dda1fbc0a922b71ac13e3de20931ecef71b3f7c2133dc7429aed3a82
Nov 27 18:19:22.465 INFO running `"docker" "start" "-a" "22c473b7dda1fbc0a922b71ac13e3de20931ecef71b3f7c2133dc7429aed3a82"`
Nov 27 18:19:23.524 INFO [stderr] usermod: no changes
Nov 27 18:19:23.601 INFO [stderr]     Checking ownership v0.1.0 (/source)
Nov 27 18:19:23.892 INFO [stderr] warning: unused variable: `string`
Nov 27 18:19:23.892 INFO [stderr]   --> src/main.rs:13:13
Nov 27 18:19:23.892 INFO [stderr]    |
Nov 27 18:19:23.892 INFO [stderr] 13 |         let string = "hello"; // string is valid from here forward
Nov 27 18:19:23.892 INFO [stderr]    |             ^^^^^^ help: consider using `_string` instead
Nov 27 18:19:23.892 INFO [stderr]    |
Nov 27 18:19:23.892 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Nov 27 18:19:23.892 INFO [stderr] 
Nov 27 18:19:23.892 INFO [stderr] warning: unused variable: `s2`
Nov 27 18:19:23.892 INFO [stderr]   --> src/main.rs:40:9
Nov 27 18:19:23.892 INFO [stderr]    |
Nov 27 18:19:23.892 INFO [stderr] 40 |     let s2 = s1;
Nov 27 18:19:23.892 INFO [stderr]    |         ^^ help: consider using `_s2` instead
Nov 27 18:19:23.892 INFO [stderr] 
Nov 27 18:19:23.892 INFO [stderr] warning: unused variable: `s1`
Nov 27 18:19:23.892 INFO [stderr]   --> src/main.rs:68:9
Nov 27 18:19:23.892 INFO [stderr]    |
Nov 27 18:19:23.892 INFO [stderr] 68 |     let s1 = gives_ownership();         // gives_ownership moves its return
Nov 27 18:19:23.892 INFO [stderr]    |         ^^ help: consider using `_s1` instead
Nov 27 18:19:23.892 INFO [stderr] 
Nov 27 18:19:23.892 INFO [stderr] warning: unused variable: `r1`
Nov 27 18:19:23.892 INFO [stderr]   --> src/main.rs:98:9
Nov 27 18:19:23.892 INFO [stderr]    |
Nov 27 18:19:23.892 INFO [stderr] 98 |     let r1 = &mut s2;
Nov 27 18:19:23.892 INFO [stderr]    |         ^^ help: consider using `_r1` instead
Nov 27 18:19:23.892 INFO [stderr] 
Nov 27 18:19:23.892 INFO [stderr] warning: unused variable: `r3`
Nov 27 18:19:23.896 INFO [stderr]    --> src/main.rs:107:13
Nov 27 18:19:23.896 INFO [stderr]     |
Nov 27 18:19:23.896 INFO [stderr] 107 |         let r3 = &mut s3;
Nov 27 18:19:23.896 INFO [stderr]     |             ^^ help: consider using `_r3` instead
Nov 27 18:19:23.896 INFO [stderr] 
Nov 27 18:19:23.896 INFO [stderr] warning: unused variable: `r4`
Nov 27 18:19:23.896 INFO [stderr]    --> src/main.rs:110:9
Nov 27 18:19:23.896 INFO [stderr]     |
Nov 27 18:19:23.896 INFO [stderr] 110 |     let r4 = &mut s3;
Nov 27 18:19:23.896 INFO [stderr]     |         ^^ help: consider using `_r4` instead
Nov 27 18:19:23.897 INFO [stderr] 
Nov 27 18:19:23.897 INFO [stderr] warning: unused variable: `r1`
Nov 27 18:19:23.897 INFO [stderr]    --> src/main.rs:113:9
Nov 27 18:19:23.897 INFO [stderr]     |
Nov 27 18:19:23.897 INFO [stderr] 113 |     let r1 = &s; // immutable ref
Nov 27 18:19:23.897 INFO [stderr]     |         ^^ help: consider using `_r1` instead
Nov 27 18:19:23.897 INFO [stderr] 
Nov 27 18:19:23.897 INFO [stderr] warning: unused variable: `r2`
Nov 27 18:19:23.897 INFO [stderr]    --> src/main.rs:114:9
Nov 27 18:19:23.897 INFO [stderr]     |
Nov 27 18:19:23.897 INFO [stderr] 114 |     let r2 = &s; // second because as many refs can read the same data safely
Nov 27 18:19:23.897 INFO [stderr]     |         ^^ help: consider using `_r2` instead
Nov 27 18:19:23.897 INFO [stderr] 
Nov 27 18:19:23.897 INFO [stderr] warning: unused variable: `slice`
Nov 27 18:19:23.897 INFO [stderr]    --> src/main.rs:140:9
Nov 27 18:19:23.897 INFO [stderr]     |
Nov 27 18:19:23.897 INFO [stderr] 140 |     let slice = &s[0..2];   // same
Nov 27 18:19:23.897 INFO [stderr]     |         ^^^^^ help: consider using `_slice` instead
Nov 27 18:19:23.897 INFO [stderr] 
Nov 27 18:19:23.897 INFO [stderr] warning: unused variable: `slice`
Nov 27 18:19:23.897 INFO [stderr]    --> src/main.rs:141:9
Nov 27 18:19:23.897 INFO [stderr]     |
Nov 27 18:19:23.897 INFO [stderr] 141 |     let slice = &s[..2];    // same
Nov 27 18:19:23.897 INFO [stderr]     |         ^^^^^ help: consider using `_slice` instead
Nov 27 18:19:23.897 INFO [stderr] 
Nov 27 18:19:23.897 INFO [stderr] warning: unused variable: `slice`
Nov 27 18:19:23.897 INFO [stderr]    --> src/main.rs:145:9
Nov 27 18:19:23.897 INFO [stderr]     |
Nov 27 18:19:23.897 INFO [stderr] 145 |     let slice = &s[2..len]; // same
Nov 27 18:19:23.897 INFO [stderr]     |         ^^^^^ help: consider using `_slice` instead
Nov 27 18:19:23.897 INFO [stderr] 
Nov 27 18:19:23.897 INFO [stderr] warning: unused variable: `slice`
Nov 27 18:19:23.897 INFO [stderr]    --> src/main.rs:146:9
Nov 27 18:19:23.897 INFO [stderr]     |
Nov 27 18:19:23.897 INFO [stderr] 146 |     let slice = &s[2..];    // same
Nov 27 18:19:23.897 INFO [stderr]     |         ^^^^^ help: consider using `_slice` instead
Nov 27 18:19:23.897 INFO [stderr] 
Nov 27 18:19:23.897 INFO [stderr] warning: unused variable: `slice`
Nov 27 18:19:23.897 INFO [stderr]    --> src/main.rs:148:9
Nov 27 18:19:23.897 INFO [stderr]     |
Nov 27 18:19:23.897 INFO [stderr] 148 |     let slice = &s[0..len]; // same
Nov 27 18:19:23.897 INFO [stderr]     |         ^^^^^ help: consider using `_slice` instead
Nov 27 18:19:23.897 INFO [stderr] 
Nov 27 18:19:23.897 INFO [stderr] warning: unused variable: `slice`
Nov 27 18:19:23.897 INFO [stderr]    --> src/main.rs:149:9
Nov 27 18:19:23.897 INFO [stderr]     |
Nov 27 18:19:23.897 INFO [stderr] 149 |     let slice = &s[..];     // same
Nov 27 18:19:23.897 INFO [stderr]     |         ^^^^^ help: consider using `_slice` instead
Nov 27 18:19:23.897 INFO [stderr] 
Nov 27 18:19:23.897 INFO [stderr] warning: unused variable: `slice`
Nov 27 18:19:23.897 INFO [stderr]    --> src/main.rs:166:9
Nov 27 18:19:23.897 INFO [stderr]     |
Nov 27 18:19:23.897 INFO [stderr] 166 |     let slice = &a[0..2];
Nov 27 18:19:23.897 INFO [stderr]     |         ^^^^^ help: consider using `_slice` instead
Nov 27 18:19:23.897 INFO [stderr] 
Nov 27 18:19:23.912 INFO [stderr] warning: variable does not need to be mutable
Nov 27 18:19:23.912 INFO [stderr]    --> src/main.rs:112:9
Nov 27 18:19:23.912 INFO [stderr]     |
Nov 27 18:19:23.912 INFO [stderr] 112 |     let mut s = String::from("hello s");
Nov 27 18:19:23.912 INFO [stderr]     |         ----^
Nov 27 18:19:23.912 INFO [stderr]     |         |
Nov 27 18:19:23.912 INFO [stderr]     |         help: remove this `mut`
Nov 27 18:19:23.912 INFO [stderr]     |
Nov 27 18:19:23.912 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Nov 27 18:19:23.912 INFO [stderr] 
Nov 27 18:19:23.960 INFO [stderr] warning: unused variable: `string`
Nov 27 18:19:23.960 INFO [stderr]   --> src/main.rs:13:13
Nov 27 18:19:23.960 INFO [stderr]    |
Nov 27 18:19:23.960 INFO [stderr] 13 |         let string = "hello"; // string is valid from here forward
Nov 27 18:19:23.960 INFO [stderr]    |             ^^^^^^ help: consider using `_string` instead
Nov 27 18:19:23.960 INFO [stderr]    |
Nov 27 18:19:23.960 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Nov 27 18:19:23.960 INFO [stderr] 
Nov 27 18:19:23.960 INFO [stderr] warning: unused variable: `s2`
Nov 27 18:19:23.960 INFO [stderr]   --> src/main.rs:40:9
Nov 27 18:19:23.960 INFO [stderr]    |
Nov 27 18:19:23.960 INFO [stderr] 40 |     let s2 = s1;
Nov 27 18:19:23.960 INFO [stderr]    |         ^^ help: consider using `_s2` instead
Nov 27 18:19:23.960 INFO [stderr] 
Nov 27 18:19:23.960 INFO [stderr] warning: unused variable: `s1`
Nov 27 18:19:23.960 INFO [stderr]   --> src/main.rs:68:9
Nov 27 18:19:23.960 INFO [stderr]    |
Nov 27 18:19:23.961 INFO [stderr] 68 |     let s1 = gives_ownership();         // gives_ownership moves its return
Nov 27 18:19:23.961 INFO [stderr]    |         ^^ help: consider using `_s1` instead
Nov 27 18:19:23.961 INFO [stderr] 
Nov 27 18:19:23.961 INFO [stderr] warning: unused variable: `r1`
Nov 27 18:19:23.961 INFO [stderr]   --> src/main.rs:98:9
Nov 27 18:19:23.961 INFO [stderr]    |
Nov 27 18:19:23.961 INFO [stderr] 98 |     let r1 = &mut s2;
Nov 27 18:19:23.961 INFO [stderr]    |         ^^ help: consider using `_r1` instead
Nov 27 18:19:23.961 INFO [stderr] 
Nov 27 18:19:23.961 INFO [stderr] warning: unused variable: `r3`
Nov 27 18:19:23.961 INFO [stderr]    --> src/main.rs:107:13
Nov 27 18:19:23.961 INFO [stderr]     |
Nov 27 18:19:23.961 INFO [stderr] 107 |         let r3 = &mut s3;
Nov 27 18:19:23.961 INFO [stderr]     |             ^^ help: consider using `_r3` instead
Nov 27 18:19:23.961 INFO [stderr] 
Nov 27 18:19:23.961 INFO [stderr] warning: unused variable: `r4`
Nov 27 18:19:23.961 INFO [stderr]    --> src/main.rs:110:9
Nov 27 18:19:23.961 INFO [stderr]     |
Nov 27 18:19:23.961 INFO [stderr] 110 |     let r4 = &mut s3;
Nov 27 18:19:23.961 INFO [stderr]     |         ^^ help: consider using `_r4` instead
Nov 27 18:19:23.961 INFO [stderr] 
Nov 27 18:19:23.961 INFO [stderr] warning: unused variable: `r1`
Nov 27 18:19:23.961 INFO [stderr]    --> src/main.rs:113:9
Nov 27 18:19:23.961 INFO [stderr]     |
Nov 27 18:19:23.961 INFO [stderr] 113 |     let r1 = &s; // immutable ref
Nov 27 18:19:23.961 INFO [stderr]     |         ^^ help: consider using `_r1` instead
Nov 27 18:19:23.961 INFO [stderr] 
Nov 27 18:19:23.961 INFO [stderr] warning: unused variable: `r2`
Nov 27 18:19:23.961 INFO [stderr]    --> src/main.rs:114:9
Nov 27 18:19:23.961 INFO [stderr]     |
Nov 27 18:19:23.961 INFO [stderr] 114 |     let r2 = &s; // second because as many refs can read the same data safely
Nov 27 18:19:23.961 INFO [stderr]     |         ^^ help: consider using `_r2` instead
Nov 27 18:19:23.961 INFO [stderr] 
Nov 27 18:19:23.961 INFO [stderr] warning: unused variable: `slice`
Nov 27 18:19:23.961 INFO [stderr]    --> src/main.rs:140:9
Nov 27 18:19:23.961 INFO [stderr]     |
Nov 27 18:19:23.961 INFO [stderr] 140 |     let slice = &s[0..2];   // same
Nov 27 18:19:23.961 INFO [stderr]     |         ^^^^^ help: consider using `_slice` instead
Nov 27 18:19:23.961 INFO [stderr] 
Nov 27 18:19:23.961 INFO [stderr] warning: unused variable: `slice`
Nov 27 18:19:23.961 INFO [stderr]    --> src/main.rs:141:9
Nov 27 18:19:23.961 INFO [stderr]     |
Nov 27 18:19:23.961 INFO [stderr] 141 |     let slice = &s[..2];    // same
Nov 27 18:19:23.961 INFO [stderr]     |         ^^^^^ help: consider using `_slice` instead
Nov 27 18:19:23.961 INFO [stderr] 
Nov 27 18:19:23.961 INFO [stderr] warning: unused variable: `slice`
Nov 27 18:19:23.961 INFO [stderr]    --> src/main.rs:145:9
Nov 27 18:19:23.961 INFO [stderr]     |
Nov 27 18:19:23.961 INFO [stderr] 145 |     let slice = &s[2..len]; // same
Nov 27 18:19:23.961 INFO [stderr]     |         ^^^^^ help: consider using `_slice` instead
Nov 27 18:19:23.961 INFO [stderr] 
Nov 27 18:19:23.961 INFO [stderr] warning: unused variable: `slice`
Nov 27 18:19:23.961 INFO [stderr]    --> src/main.rs:146:9
Nov 27 18:19:23.961 INFO [stderr]     |
Nov 27 18:19:23.961 INFO [stderr] 146 |     let slice = &s[2..];    // same
Nov 27 18:19:23.961 INFO [stderr]     |         ^^^^^ help: consider using `_slice` instead
Nov 27 18:19:23.961 INFO [stderr] 
Nov 27 18:19:23.961 INFO [stderr] warning: unused variable: `slice`
Nov 27 18:19:23.961 INFO [stderr]    --> src/main.rs:148:9
Nov 27 18:19:23.961 INFO [stderr]     |
Nov 27 18:19:23.961 INFO [stderr] 148 |     let slice = &s[0..len]; // same
Nov 27 18:19:23.961 INFO [stderr]     |         ^^^^^ help: consider using `_slice` instead
Nov 27 18:19:23.961 INFO [stderr] 
Nov 27 18:19:23.961 INFO [stderr] warning: unused variable: `slice`
Nov 27 18:19:23.961 INFO [stderr]    --> src/main.rs:149:9
Nov 27 18:19:23.961 INFO [stderr]     |
Nov 27 18:19:23.961 INFO [stderr] 149 |     let slice = &s[..];     // same
Nov 27 18:19:23.961 INFO [stderr]     |         ^^^^^ help: consider using `_slice` instead
Nov 27 18:19:23.961 INFO [stderr] 
Nov 27 18:19:23.961 INFO [stderr] warning: unused variable: `slice`
Nov 27 18:19:23.961 INFO [stderr]    --> src/main.rs:166:9
Nov 27 18:19:23.961 INFO [stderr]     |
Nov 27 18:19:23.961 INFO [stderr] 166 |     let slice = &a[0..2];
Nov 27 18:19:23.961 INFO [stderr]     |         ^^^^^ help: consider using `_slice` instead
Nov 27 18:19:23.961 INFO [stderr] 
Nov 27 18:19:23.972 INFO [stderr] warning: variable does not need to be mutable
Nov 27 18:19:23.972 INFO [stderr]    --> src/main.rs:112:9
Nov 27 18:19:23.972 INFO [stderr]     |
Nov 27 18:19:23.972 INFO [stderr] 112 |     let mut s = String::from("hello s");
Nov 27 18:19:23.972 INFO [stderr]     |         ----^
Nov 27 18:19:23.972 INFO [stderr]     |         |
Nov 27 18:19:23.972 INFO [stderr]     |         help: remove this `mut`
Nov 27 18:19:23.972 INFO [stderr]     |
Nov 27 18:19:23.972 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Nov 27 18:19:23.972 INFO [stderr] 
Nov 27 18:19:24.004 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.43s
Nov 27 18:19:24.004 INFO [stderr] su: No module specific data is present
Nov 27 18:19:24.738 INFO running `"docker" "inspect" "22c473b7dda1fbc0a922b71ac13e3de20931ecef71b3f7c2133dc7429aed3a82"`
Nov 27 18:19:24.963 INFO running `"docker" "rm" "-f" "22c473b7dda1fbc0a922b71ac13e3de20931ecef71b3f7c2133dc7429aed3a82"`
Nov 27 18:19:25.165 INFO [stdout] 22c473b7dda1fbc0a922b71ac13e3de20931ecef71b3f7c2133dc7429aed3a82