Nov 16 10:17:23.840 INFO testing tperdue321/rust_ownership against master#6b9b97bd9b704f85f0184f7a213cc4d62bd9654c for pr-55982
Nov 16 10:17:23.840 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-55982/worker-2/master#6b9b97bd9b704f85f0184f7a213cc4d62bd9654c:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-2/pr-55982/master#6b9b97bd9b704f85f0184f7a213cc4d62bd9654c:/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 +6b9b97bd9b704f85f0184f7a213cc4d62bd9654c-alt build --frozen" "-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 16 10:17:24.247 INFO [stdout] b52f45488b9f47e438436975c887217bc82306bd3350a4f5b0b521a767e49630
Nov 16 10:17:24.249 INFO running `"docker" "start" "-a" "b52f45488b9f47e438436975c887217bc82306bd3350a4f5b0b521a767e49630"`
Nov 16 10:17:25.475 INFO [stderr] usermod: no changes
Nov 16 10:17:25.535 INFO [stderr]    Compiling ownership v0.1.0 (/source)
Nov 16 10:17:25.763 INFO [stderr] warning: unused variable: `string`
Nov 16 10:17:25.763 INFO [stderr]   --> src/main.rs:13:13
Nov 16 10:17:25.763 INFO [stderr]    |
Nov 16 10:17:25.763 INFO [stderr] 13 |         let string = "hello"; // string is valid from here forward
Nov 16 10:17:25.763 INFO [stderr]    |             ^^^^^^ help: consider using `_string` instead
Nov 16 10:17:25.763 INFO [stderr]    |
Nov 16 10:17:25.763 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Nov 16 10:17:25.763 INFO [stderr] 
Nov 16 10:17:25.763 INFO [stderr] warning: unused variable: `s2`
Nov 16 10:17:25.763 INFO [stderr]   --> src/main.rs:40:9
Nov 16 10:17:25.763 INFO [stderr]    |
Nov 16 10:17:25.763 INFO [stderr] 40 |     let s2 = s1;
Nov 16 10:17:25.763 INFO [stderr]    |         ^^ help: consider using `_s2` instead
Nov 16 10:17:25.763 INFO [stderr] 
Nov 16 10:17:25.763 INFO [stderr] warning: unused variable: `s1`
Nov 16 10:17:25.763 INFO [stderr]   --> src/main.rs:68:9
Nov 16 10:17:25.763 INFO [stderr]    |
Nov 16 10:17:25.763 INFO [stderr] 68 |     let s1 = gives_ownership();         // gives_ownership moves its return
Nov 16 10:17:25.763 INFO [stderr]    |         ^^ help: consider using `_s1` instead
Nov 16 10:17:25.763 INFO [stderr] 
Nov 16 10:17:25.763 INFO [stderr] warning: unused variable: `r1`
Nov 16 10:17:25.763 INFO [stderr]   --> src/main.rs:98:9
Nov 16 10:17:25.763 INFO [stderr]    |
Nov 16 10:17:25.763 INFO [stderr] 98 |     let r1 = &mut s2;
Nov 16 10:17:25.763 INFO [stderr]    |         ^^ help: consider using `_r1` instead
Nov 16 10:17:25.763 INFO [stderr] 
Nov 16 10:17:25.763 INFO [stderr] warning: unused variable: `r3`
Nov 16 10:17:25.763 INFO [stderr]    --> src/main.rs:107:13
Nov 16 10:17:25.763 INFO [stderr]     |
Nov 16 10:17:25.763 INFO [stderr] 107 |         let r3 = &mut s3;
Nov 16 10:17:25.763 INFO [stderr]     |             ^^ help: consider using `_r3` instead
Nov 16 10:17:25.763 INFO [stderr] 
Nov 16 10:17:25.764 INFO [stderr] warning: unused variable: `r4`
Nov 16 10:17:25.764 INFO [stderr]    --> src/main.rs:110:9
Nov 16 10:17:25.764 INFO [stderr]     |
Nov 16 10:17:25.764 INFO [stderr] 110 |     let r4 = &mut s3;
Nov 16 10:17:25.764 INFO [stderr]     |         ^^ help: consider using `_r4` instead
Nov 16 10:17:25.764 INFO [stderr] 
Nov 16 10:17:25.764 INFO [stderr] warning: unused variable: `r1`
Nov 16 10:17:25.764 INFO [stderr]    --> src/main.rs:113:9
Nov 16 10:17:25.764 INFO [stderr]     |
Nov 16 10:17:25.764 INFO [stderr] 113 |     let r1 = &s; // immutable ref
Nov 16 10:17:25.764 INFO [stderr]     |         ^^ help: consider using `_r1` instead
Nov 16 10:17:25.764 INFO [stderr] 
Nov 16 10:17:25.764 INFO [stderr] warning: unused variable: `r2`
Nov 16 10:17:25.764 INFO [stderr]    --> src/main.rs:114:9
Nov 16 10:17:25.764 INFO [stderr]     |
Nov 16 10:17:25.764 INFO [stderr] 114 |     let r2 = &s; // second because as many refs can read the same data safely
Nov 16 10:17:25.764 INFO [stderr]     |         ^^ help: consider using `_r2` instead
Nov 16 10:17:25.764 INFO [stderr] 
Nov 16 10:17:25.764 INFO [stderr] warning: unused variable: `slice`
Nov 16 10:17:25.764 INFO [stderr]    --> src/main.rs:140:9
Nov 16 10:17:25.764 INFO [stderr]     |
Nov 16 10:17:25.764 INFO [stderr] 140 |     let slice = &s[0..2];   // same
Nov 16 10:17:25.764 INFO [stderr]     |         ^^^^^ help: consider using `_slice` instead
Nov 16 10:17:25.764 INFO [stderr] 
Nov 16 10:17:25.764 INFO [stderr] warning: unused variable: `slice`
Nov 16 10:17:25.764 INFO [stderr]    --> src/main.rs:141:9
Nov 16 10:17:25.764 INFO [stderr]     |
Nov 16 10:17:25.764 INFO [stderr] 141 |     let slice = &s[..2];    // same
Nov 16 10:17:25.764 INFO [stderr]     |         ^^^^^ help: consider using `_slice` instead
Nov 16 10:17:25.764 INFO [stderr] 
Nov 16 10:17:25.764 INFO [stderr] warning: unused variable: `slice`
Nov 16 10:17:25.764 INFO [stderr]    --> src/main.rs:145:9
Nov 16 10:17:25.764 INFO [stderr]     |
Nov 16 10:17:25.764 INFO [stderr] 145 |     let slice = &s[2..len]; // same
Nov 16 10:17:25.764 INFO [stderr]     |         ^^^^^ help: consider using `_slice` instead
Nov 16 10:17:25.764 INFO [stderr] 
Nov 16 10:17:25.764 INFO [stderr] warning: unused variable: `slice`
Nov 16 10:17:25.764 INFO [stderr]    --> src/main.rs:146:9
Nov 16 10:17:25.764 INFO [stderr]     |
Nov 16 10:17:25.764 INFO [stderr] 146 |     let slice = &s[2..];    // same
Nov 16 10:17:25.764 INFO [stderr]     |         ^^^^^ help: consider using `_slice` instead
Nov 16 10:17:25.764 INFO [stderr] 
Nov 16 10:17:25.764 INFO [stderr] warning: unused variable: `slice`
Nov 16 10:17:25.764 INFO [stderr]    --> src/main.rs:148:9
Nov 16 10:17:25.764 INFO [stderr]     |
Nov 16 10:17:25.764 INFO [stderr] 148 |     let slice = &s[0..len]; // same
Nov 16 10:17:25.764 INFO [stderr]     |         ^^^^^ help: consider using `_slice` instead
Nov 16 10:17:25.764 INFO [stderr] 
Nov 16 10:17:25.764 INFO [stderr] warning: unused variable: `slice`
Nov 16 10:17:25.764 INFO [stderr]    --> src/main.rs:149:9
Nov 16 10:17:25.764 INFO [stderr]     |
Nov 16 10:17:25.764 INFO [stderr] 149 |     let slice = &s[..];     // same
Nov 16 10:17:25.764 INFO [stderr]     |         ^^^^^ help: consider using `_slice` instead
Nov 16 10:17:25.764 INFO [stderr] 
Nov 16 10:17:25.764 INFO [stderr] warning: unused variable: `slice`
Nov 16 10:17:25.764 INFO [stderr]    --> src/main.rs:166:9
Nov 16 10:17:25.764 INFO [stderr]     |
Nov 16 10:17:25.764 INFO [stderr] 166 |     let slice = &a[0..2];
Nov 16 10:17:25.764 INFO [stderr]     |         ^^^^^ help: consider using `_slice` instead
Nov 16 10:17:25.764 INFO [stderr] 
Nov 16 10:17:25.782 INFO [stderr] warning: variable does not need to be mutable
Nov 16 10:17:25.782 INFO [stderr]    --> src/main.rs:112:9
Nov 16 10:17:25.782 INFO [stderr]     |
Nov 16 10:17:25.783 INFO [stderr] 112 |     let mut s = String::from("hello s");
Nov 16 10:17:25.783 INFO [stderr]     |         ----^
Nov 16 10:17:25.783 INFO [stderr]     |         |
Nov 16 10:17:25.783 INFO [stderr]     |         help: remove this `mut`
Nov 16 10:17:25.783 INFO [stderr]     |
Nov 16 10:17:25.783 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Nov 16 10:17:25.783 INFO [stderr] 
Nov 16 10:17:26.375 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.86s
Nov 16 10:17:26.375 INFO [stderr] su: No module specific data is present
Nov 16 10:17:27.037 INFO running `"docker" "inspect" "b52f45488b9f47e438436975c887217bc82306bd3350a4f5b0b521a767e49630"`
Nov 16 10:17:27.473 INFO running `"docker" "rm" "-f" "b52f45488b9f47e438436975c887217bc82306bd3350a4f5b0b521a767e49630"`
Nov 16 10:17:27.813 INFO [stdout] b52f45488b9f47e438436975c887217bc82306bd3350a4f5b0b521a767e49630
Nov 16 10:17:27.817 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-55982/worker-2/master#6b9b97bd9b704f85f0184f7a213cc4d62bd9654c:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-2/pr-55982/master#6b9b97bd9b704f85f0184f7a213cc4d62bd9654c:/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 +6b9b97bd9b704f85f0184f7a213cc4d62bd9654c-alt test --frozen --no-run" "-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 16 10:17:28.052 INFO [stdout] 97343d0a487ff87b5ea793913d164d4b1cccd25cd7d6ff4166807f403b9c5734
Nov 16 10:17:28.055 INFO running `"docker" "start" "-a" "97343d0a487ff87b5ea793913d164d4b1cccd25cd7d6ff4166807f403b9c5734"`
Nov 16 10:17:28.461 INFO [stderr] usermod: no changes
Nov 16 10:17:28.495 INFO [stderr]    Compiling ownership v0.1.0 (/source)
Nov 16 10:17:28.647 INFO [stderr] warning: unused variable: `string`
Nov 16 10:17:28.647 INFO [stderr]   --> src/main.rs:13:13
Nov 16 10:17:28.647 INFO [stderr]    |
Nov 16 10:17:28.647 INFO [stderr] 13 |         let string = "hello"; // string is valid from here forward
Nov 16 10:17:28.647 INFO [stderr]    |             ^^^^^^ help: consider using `_string` instead
Nov 16 10:17:28.647 INFO [stderr]    |
Nov 16 10:17:28.647 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Nov 16 10:17:28.647 INFO [stderr] 
Nov 16 10:17:28.647 INFO [stderr] warning: unused variable: `s2`
Nov 16 10:17:28.647 INFO [stderr]   --> src/main.rs:40:9
Nov 16 10:17:28.647 INFO [stderr]    |
Nov 16 10:17:28.647 INFO [stderr] 40 |     let s2 = s1;
Nov 16 10:17:28.647 INFO [stderr]    |         ^^ help: consider using `_s2` instead
Nov 16 10:17:28.647 INFO [stderr] 
Nov 16 10:17:28.647 INFO [stderr] warning: unused variable: `s1`
Nov 16 10:17:28.647 INFO [stderr]   --> src/main.rs:68:9
Nov 16 10:17:28.647 INFO [stderr]    |
Nov 16 10:17:28.647 INFO [stderr] 68 |     let s1 = gives_ownership();         // gives_ownership moves its return
Nov 16 10:17:28.647 INFO [stderr]    |         ^^ help: consider using `_s1` instead
Nov 16 10:17:28.647 INFO [stderr] 
Nov 16 10:17:28.647 INFO [stderr] warning: unused variable: `r1`
Nov 16 10:17:28.647 INFO [stderr]   --> src/main.rs:98:9
Nov 16 10:17:28.647 INFO [stderr]    |
Nov 16 10:17:28.647 INFO [stderr] 98 |     let r1 = &mut s2;
Nov 16 10:17:28.647 INFO [stderr]    |         ^^ help: consider using `_r1` instead
Nov 16 10:17:28.647 INFO [stderr] 
Nov 16 10:17:28.647 INFO [stderr] warning: unused variable: `r3`
Nov 16 10:17:28.647 INFO [stderr]    --> src/main.rs:107:13
Nov 16 10:17:28.647 INFO [stderr]     |
Nov 16 10:17:28.647 INFO [stderr] 107 |         let r3 = &mut s3;
Nov 16 10:17:28.647 INFO [stderr]     |             ^^ help: consider using `_r3` instead
Nov 16 10:17:28.647 INFO [stderr] 
Nov 16 10:17:28.647 INFO [stderr] warning: unused variable: `r4`
Nov 16 10:17:28.647 INFO [stderr]    --> src/main.rs:110:9
Nov 16 10:17:28.647 INFO [stderr]     |
Nov 16 10:17:28.648 INFO [stderr] 110 |     let r4 = &mut s3;
Nov 16 10:17:28.648 INFO [stderr]     |         ^^ help: consider using `_r4` instead
Nov 16 10:17:28.648 INFO [stderr] 
Nov 16 10:17:28.648 INFO [stderr] warning: unused variable: `r1`
Nov 16 10:17:28.648 INFO [stderr]    --> src/main.rs:113:9
Nov 16 10:17:28.648 INFO [stderr]     |
Nov 16 10:17:28.648 INFO [stderr] 113 |     let r1 = &s; // immutable ref
Nov 16 10:17:28.648 INFO [stderr]     |         ^^ help: consider using `_r1` instead
Nov 16 10:17:28.648 INFO [stderr] 
Nov 16 10:17:28.648 INFO [stderr] warning: unused variable: `r2`
Nov 16 10:17:28.648 INFO [stderr]    --> src/main.rs:114:9
Nov 16 10:17:28.648 INFO [stderr]     |
Nov 16 10:17:28.648 INFO [stderr] 114 |     let r2 = &s; // second because as many refs can read the same data safely
Nov 16 10:17:28.648 INFO [stderr]     |         ^^ help: consider using `_r2` instead
Nov 16 10:17:28.648 INFO [stderr] 
Nov 16 10:17:28.648 INFO [stderr] warning: unused variable: `slice`
Nov 16 10:17:28.648 INFO [stderr]    --> src/main.rs:140:9
Nov 16 10:17:28.648 INFO [stderr]     |
Nov 16 10:17:28.648 INFO [stderr] 140 |     let slice = &s[0..2];   // same
Nov 16 10:17:28.648 INFO [stderr]     |         ^^^^^ help: consider using `_slice` instead
Nov 16 10:17:28.648 INFO [stderr] 
Nov 16 10:17:28.648 INFO [stderr] warning: unused variable: `slice`
Nov 16 10:17:28.648 INFO [stderr]    --> src/main.rs:141:9
Nov 16 10:17:28.648 INFO [stderr]     |
Nov 16 10:17:28.648 INFO [stderr] 141 |     let slice = &s[..2];    // same
Nov 16 10:17:28.648 INFO [stderr]     |         ^^^^^ help: consider using `_slice` instead
Nov 16 10:17:28.648 INFO [stderr] 
Nov 16 10:17:28.648 INFO [stderr] warning: unused variable: `slice`
Nov 16 10:17:28.648 INFO [stderr]    --> src/main.rs:145:9
Nov 16 10:17:28.648 INFO [stderr]     |
Nov 16 10:17:28.648 INFO [stderr] 145 |     let slice = &s[2..len]; // same
Nov 16 10:17:28.648 INFO [stderr]     |         ^^^^^ help: consider using `_slice` instead
Nov 16 10:17:28.648 INFO [stderr] 
Nov 16 10:17:28.648 INFO [stderr] warning: unused variable: `slice`
Nov 16 10:17:28.648 INFO [stderr]    --> src/main.rs:146:9
Nov 16 10:17:28.648 INFO [stderr]     |
Nov 16 10:17:28.648 INFO [stderr] 146 |     let slice = &s[2..];    // same
Nov 16 10:17:28.648 INFO [stderr]     |         ^^^^^ help: consider using `_slice` instead
Nov 16 10:17:28.648 INFO [stderr] 
Nov 16 10:17:28.648 INFO [stderr] warning: unused variable: `slice`
Nov 16 10:17:28.648 INFO [stderr]    --> src/main.rs:148:9
Nov 16 10:17:28.648 INFO [stderr]     |
Nov 16 10:17:28.648 INFO [stderr] 148 |     let slice = &s[0..len]; // same
Nov 16 10:17:28.648 INFO [stderr]     |         ^^^^^ help: consider using `_slice` instead
Nov 16 10:17:28.648 INFO [stderr] 
Nov 16 10:17:28.648 INFO [stderr] warning: unused variable: `slice`
Nov 16 10:17:28.648 INFO [stderr]    --> src/main.rs:149:9
Nov 16 10:17:28.648 INFO [stderr]     |
Nov 16 10:17:28.648 INFO [stderr] 149 |     let slice = &s[..];     // same
Nov 16 10:17:28.648 INFO [stderr]     |         ^^^^^ help: consider using `_slice` instead
Nov 16 10:17:28.648 INFO [stderr] 
Nov 16 10:17:28.648 INFO [stderr] warning: unused variable: `slice`
Nov 16 10:17:28.648 INFO [stderr]    --> src/main.rs:166:9
Nov 16 10:17:28.648 INFO [stderr]     |
Nov 16 10:17:28.648 INFO [stderr] 166 |     let slice = &a[0..2];
Nov 16 10:17:28.648 INFO [stderr]     |         ^^^^^ help: consider using `_slice` instead
Nov 16 10:17:28.648 INFO [stderr] 
Nov 16 10:17:28.659 INFO [stderr] warning: variable does not need to be mutable
Nov 16 10:17:28.659 INFO [stderr]    --> src/main.rs:112:9
Nov 16 10:17:28.659 INFO [stderr]     |
Nov 16 10:17:28.659 INFO [stderr] 112 |     let mut s = String::from("hello s");
Nov 16 10:17:28.659 INFO [stderr]     |         ----^
Nov 16 10:17:28.659 INFO [stderr]     |         |
Nov 16 10:17:28.659 INFO [stderr]     |         help: remove this `mut`
Nov 16 10:17:28.659 INFO [stderr]     |
Nov 16 10:17:28.659 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Nov 16 10:17:28.659 INFO [stderr] 
Nov 16 10:17:28.868 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.38s
Nov 16 10:17:28.868 INFO [stderr] su: No module specific data is present
Nov 16 10:17:29.204 INFO running `"docker" "inspect" "97343d0a487ff87b5ea793913d164d4b1cccd25cd7d6ff4166807f403b9c5734"`
Nov 16 10:17:29.275 INFO running `"docker" "rm" "-f" "97343d0a487ff87b5ea793913d164d4b1cccd25cd7d6ff4166807f403b9c5734"`
Nov 16 10:17:29.457 INFO [stdout] 97343d0a487ff87b5ea793913d164d4b1cccd25cd7d6ff4166807f403b9c5734
Nov 16 10:17:29.457 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-55982/worker-2/master#6b9b97bd9b704f85f0184f7a213cc4d62bd9654c:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-2/pr-55982/master#6b9b97bd9b704f85f0184f7a213cc4d62bd9654c:/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 +6b9b97bd9b704f85f0184f7a213cc4d62bd9654c-alt test --frozen" "-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 16 10:17:29.809 INFO [stdout] f90b1688c07b21aa31afbcbf2f3d6dd8c51bc7a84851c76338308d51e5bd98bb
Nov 16 10:17:29.810 INFO running `"docker" "start" "-a" "f90b1688c07b21aa31afbcbf2f3d6dd8c51bc7a84851c76338308d51e5bd98bb"`
Nov 16 10:17:30.320 INFO [stderr] usermod: no changes
Nov 16 10:17:30.354 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
Nov 16 10:17:30.358 INFO [stderr]      Running /target/debug/deps/ownership-388c6a48651a9b04
Nov 16 10:17:30.360 INFO [stdout] 
Nov 16 10:17:30.360 INFO [stdout] running 0 tests
Nov 16 10:17:30.360 INFO [stdout] 
Nov 16 10:17:30.360 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Nov 16 10:17:30.360 INFO [stdout] 
Nov 16 10:17:30.362 INFO [stderr] su: No module specific data is present
Nov 16 10:17:30.618 INFO running `"docker" "inspect" "f90b1688c07b21aa31afbcbf2f3d6dd8c51bc7a84851c76338308d51e5bd98bb"`
Nov 16 10:17:30.715 INFO running `"docker" "rm" "-f" "f90b1688c07b21aa31afbcbf2f3d6dd8c51bc7a84851c76338308d51e5bd98bb"`
Nov 16 10:17:30.814 INFO [stdout] f90b1688c07b21aa31afbcbf2f3d6dd8c51bc7a84851c76338308d51e5bd98bb