Dec 12 23:30:41.284 INFO testing tperdue321/rust_ownership against try#aa49d8ef14939ddec0e34b346b60174a5673d48f for pr-56550
Dec 12 23:30:41.284 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-5/try#aa49d8ef14939ddec0e34b346b60174a5673d48f:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-5/pr-56550/try#aa49d8ef14939ddec0e34b346b60174a5673d48f:/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 +aa49d8ef14939ddec0e34b346b60174a5673d48f-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"`
Dec 12 23:30:41.584 INFO [stdout] 5e5cb25ac05bfbdc5eeb42dddded4ed7510702520c0c83c7cd9731ff91398a0b
Dec 12 23:30:41.593 INFO running `"docker" "start" "-a" "5e5cb25ac05bfbdc5eeb42dddded4ed7510702520c0c83c7cd9731ff91398a0b"`
Dec 12 23:30:41.989 INFO [stderr] usermod: no changes
Dec 12 23:30:42.011 INFO [stderr]    Compiling ownership v0.1.0 (/source)
Dec 12 23:30:42.158 INFO [stderr] warning: unused variable: `string`
Dec 12 23:30:42.158 INFO [stderr]   --> src/main.rs:13:13
Dec 12 23:30:42.158 INFO [stderr]    |
Dec 12 23:30:42.158 INFO [stderr] 13 |         let string = "hello"; // string is valid from here forward
Dec 12 23:30:42.158 INFO [stderr]    |             ^^^^^^ help: consider using `_string` instead
Dec 12 23:30:42.158 INFO [stderr]    |
Dec 12 23:30:42.158 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 12 23:30:42.158 INFO [stderr] 
Dec 12 23:30:42.158 INFO [stderr] warning: unused variable: `s2`
Dec 12 23:30:42.158 INFO [stderr]   --> src/main.rs:40:9
Dec 12 23:30:42.158 INFO [stderr]    |
Dec 12 23:30:42.158 INFO [stderr] 40 |     let s2 = s1;
Dec 12 23:30:42.158 INFO [stderr]    |         ^^ help: consider using `_s2` instead
Dec 12 23:30:42.158 INFO [stderr] 
Dec 12 23:30:42.158 INFO [stderr] warning: unused variable: `s1`
Dec 12 23:30:42.158 INFO [stderr]   --> src/main.rs:68:9
Dec 12 23:30:42.158 INFO [stderr]    |
Dec 12 23:30:42.158 INFO [stderr] 68 |     let s1 = gives_ownership();         // gives_ownership moves its return
Dec 12 23:30:42.158 INFO [stderr]    |         ^^ help: consider using `_s1` instead
Dec 12 23:30:42.158 INFO [stderr] 
Dec 12 23:30:42.158 INFO [stderr] warning: unused variable: `r1`
Dec 12 23:30:42.158 INFO [stderr]   --> src/main.rs:98:9
Dec 12 23:30:42.158 INFO [stderr]    |
Dec 12 23:30:42.158 INFO [stderr] 98 |     let r1 = &mut s2;
Dec 12 23:30:42.158 INFO [stderr]    |         ^^ help: consider using `_r1` instead
Dec 12 23:30:42.158 INFO [stderr] 
Dec 12 23:30:42.158 INFO [stderr] warning: unused variable: `r3`
Dec 12 23:30:42.158 INFO [stderr]    --> src/main.rs:107:13
Dec 12 23:30:42.158 INFO [stderr]     |
Dec 12 23:30:42.159 INFO [stderr] 107 |         let r3 = &mut s3;
Dec 12 23:30:42.159 INFO [stderr]     |             ^^ help: consider using `_r3` instead
Dec 12 23:30:42.159 INFO [stderr] 
Dec 12 23:30:42.159 INFO [stderr] warning: unused variable: `r4`
Dec 12 23:30:42.159 INFO [stderr]    --> src/main.rs:110:9
Dec 12 23:30:42.159 INFO [stderr]     |
Dec 12 23:30:42.159 INFO [stderr] 110 |     let r4 = &mut s3;
Dec 12 23:30:42.159 INFO [stderr]     |         ^^ help: consider using `_r4` instead
Dec 12 23:30:42.159 INFO [stderr] 
Dec 12 23:30:42.159 INFO [stderr] warning: unused variable: `r1`
Dec 12 23:30:42.159 INFO [stderr]    --> src/main.rs:113:9
Dec 12 23:30:42.159 INFO [stderr]     |
Dec 12 23:30:42.159 INFO [stderr] 113 |     let r1 = &s; // immutable ref
Dec 12 23:30:42.159 INFO [stderr]     |         ^^ help: consider using `_r1` instead
Dec 12 23:30:42.159 INFO [stderr] 
Dec 12 23:30:42.159 INFO [stderr] warning: unused variable: `r2`
Dec 12 23:30:42.159 INFO [stderr]    --> src/main.rs:114:9
Dec 12 23:30:42.159 INFO [stderr]     |
Dec 12 23:30:42.159 INFO [stderr] 114 |     let r2 = &s; // second because as many refs can read the same data safely
Dec 12 23:30:42.159 INFO [stderr]     |         ^^ help: consider using `_r2` instead
Dec 12 23:30:42.159 INFO [stderr] 
Dec 12 23:30:42.159 INFO [stderr] warning: unused variable: `slice`
Dec 12 23:30:42.159 INFO [stderr]    --> src/main.rs:140:9
Dec 12 23:30:42.159 INFO [stderr]     |
Dec 12 23:30:42.159 INFO [stderr] 140 |     let slice = &s[0..2];   // same
Dec 12 23:30:42.159 INFO [stderr]     |         ^^^^^ help: consider using `_slice` instead
Dec 12 23:30:42.159 INFO [stderr] 
Dec 12 23:30:42.159 INFO [stderr] warning: unused variable: `slice`
Dec 12 23:30:42.159 INFO [stderr]    --> src/main.rs:141:9
Dec 12 23:30:42.159 INFO [stderr]     |
Dec 12 23:30:42.159 INFO [stderr] 141 |     let slice = &s[..2];    // same
Dec 12 23:30:42.159 INFO [stderr]     |         ^^^^^ help: consider using `_slice` instead
Dec 12 23:30:42.159 INFO [stderr] 
Dec 12 23:30:42.159 INFO [stderr] warning: unused variable: `slice`
Dec 12 23:30:42.159 INFO [stderr]    --> src/main.rs:145:9
Dec 12 23:30:42.159 INFO [stderr]     |
Dec 12 23:30:42.159 INFO [stderr] 145 |     let slice = &s[2..len]; // same
Dec 12 23:30:42.159 INFO [stderr]     |         ^^^^^ help: consider using `_slice` instead
Dec 12 23:30:42.159 INFO [stderr] 
Dec 12 23:30:42.159 INFO [stderr] warning: unused variable: `slice`
Dec 12 23:30:42.159 INFO [stderr]    --> src/main.rs:146:9
Dec 12 23:30:42.159 INFO [stderr]     |
Dec 12 23:30:42.159 INFO [stderr] 146 |     let slice = &s[2..];    // same
Dec 12 23:30:42.159 INFO [stderr]     |         ^^^^^ help: consider using `_slice` instead
Dec 12 23:30:42.159 INFO [stderr] 
Dec 12 23:30:42.159 INFO [stderr] warning: unused variable: `slice`
Dec 12 23:30:42.159 INFO [stderr]    --> src/main.rs:148:9
Dec 12 23:30:42.159 INFO [stderr]     |
Dec 12 23:30:42.159 INFO [stderr] 148 |     let slice = &s[0..len]; // same
Dec 12 23:30:42.159 INFO [stderr]     |         ^^^^^ help: consider using `_slice` instead
Dec 12 23:30:42.159 INFO [stderr] 
Dec 12 23:30:42.159 INFO [stderr] warning: unused variable: `slice`
Dec 12 23:30:42.159 INFO [stderr]    --> src/main.rs:149:9
Dec 12 23:30:42.159 INFO [stderr]     |
Dec 12 23:30:42.159 INFO [stderr] 149 |     let slice = &s[..];     // same
Dec 12 23:30:42.159 INFO [stderr]     |         ^^^^^ help: consider using `_slice` instead
Dec 12 23:30:42.159 INFO [stderr] 
Dec 12 23:30:42.159 INFO [stderr] warning: unused variable: `slice`
Dec 12 23:30:42.159 INFO [stderr]    --> src/main.rs:166:9
Dec 12 23:30:42.159 INFO [stderr]     |
Dec 12 23:30:42.159 INFO [stderr] 166 |     let slice = &a[0..2];
Dec 12 23:30:42.159 INFO [stderr]     |         ^^^^^ help: consider using `_slice` instead
Dec 12 23:30:42.159 INFO [stderr] 
Dec 12 23:30:42.168 INFO [stderr] warning: variable does not need to be mutable
Dec 12 23:30:42.168 INFO [stderr]    --> src/main.rs:112:9
Dec 12 23:30:42.168 INFO [stderr]     |
Dec 12 23:30:42.168 INFO [stderr] 112 |     let mut s = String::from("hello s");
Dec 12 23:30:42.168 INFO [stderr]     |         ----^
Dec 12 23:30:42.168 INFO [stderr]     |         |
Dec 12 23:30:42.168 INFO [stderr]     |         help: remove this `mut`
Dec 12 23:30:42.168 INFO [stderr]     |
Dec 12 23:30:42.168 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 12 23:30:42.168 INFO [stderr] 
Dec 12 23:30:42.465 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.46s
Dec 12 23:30:42.465 INFO [stderr] su: No module specific data is present
Dec 12 23:30:42.830 INFO running `"docker" "inspect" "5e5cb25ac05bfbdc5eeb42dddded4ed7510702520c0c83c7cd9731ff91398a0b"`
Dec 12 23:30:42.969 INFO running `"docker" "rm" "-f" "5e5cb25ac05bfbdc5eeb42dddded4ed7510702520c0c83c7cd9731ff91398a0b"`
Dec 12 23:30:43.037 INFO [stdout] 5e5cb25ac05bfbdc5eeb42dddded4ed7510702520c0c83c7cd9731ff91398a0b
Dec 12 23:30:43.039 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-5/try#aa49d8ef14939ddec0e34b346b60174a5673d48f:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-5/pr-56550/try#aa49d8ef14939ddec0e34b346b60174a5673d48f:/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 +aa49d8ef14939ddec0e34b346b60174a5673d48f-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"`
Dec 12 23:30:43.241 INFO [stdout] b74eb1dddab4572eba379576c6d415d6c14a408a89b5407786187ab492570114
Dec 12 23:30:43.244 INFO running `"docker" "start" "-a" "b74eb1dddab4572eba379576c6d415d6c14a408a89b5407786187ab492570114"`
Dec 12 23:30:43.698 INFO [stderr] usermod: no changes
Dec 12 23:30:43.733 INFO [stderr]    Compiling ownership v0.1.0 (/source)
Dec 12 23:30:43.935 INFO [stderr] warning: unused variable: `string`
Dec 12 23:30:43.935 INFO [stderr]   --> src/main.rs:13:13
Dec 12 23:30:43.935 INFO [stderr]    |
Dec 12 23:30:43.935 INFO [stderr] 13 |         let string = "hello"; // string is valid from here forward
Dec 12 23:30:43.935 INFO [stderr]    |             ^^^^^^ help: consider using `_string` instead
Dec 12 23:30:43.935 INFO [stderr]    |
Dec 12 23:30:43.935 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 12 23:30:43.935 INFO [stderr] 
Dec 12 23:30:43.935 INFO [stderr] warning: unused variable: `s2`
Dec 12 23:30:43.935 INFO [stderr]   --> src/main.rs:40:9
Dec 12 23:30:43.935 INFO [stderr]    |
Dec 12 23:30:43.935 INFO [stderr] 40 |     let s2 = s1;
Dec 12 23:30:43.935 INFO [stderr]    |         ^^ help: consider using `_s2` instead
Dec 12 23:30:43.935 INFO [stderr] 
Dec 12 23:30:43.935 INFO [stderr] warning: unused variable: `s1`
Dec 12 23:30:43.935 INFO [stderr]   --> src/main.rs:68:9
Dec 12 23:30:43.935 INFO [stderr]    |
Dec 12 23:30:43.935 INFO [stderr] 68 |     let s1 = gives_ownership();         // gives_ownership moves its return
Dec 12 23:30:43.935 INFO [stderr]    |         ^^ help: consider using `_s1` instead
Dec 12 23:30:43.935 INFO [stderr] 
Dec 12 23:30:43.935 INFO [stderr] warning: unused variable: `r1`
Dec 12 23:30:43.935 INFO [stderr]   --> src/main.rs:98:9
Dec 12 23:30:43.935 INFO [stderr]    |
Dec 12 23:30:43.935 INFO [stderr] 98 |     let r1 = &mut s2;
Dec 12 23:30:43.935 INFO [stderr]    |         ^^ help: consider using `_r1` instead
Dec 12 23:30:43.935 INFO [stderr] 
Dec 12 23:30:43.935 INFO [stderr] warning: unused variable: `r3`
Dec 12 23:30:43.935 INFO [stderr]    --> src/main.rs:107:13
Dec 12 23:30:43.935 INFO [stderr]     |
Dec 12 23:30:43.935 INFO [stderr] 107 |         let r3 = &mut s3;
Dec 12 23:30:43.935 INFO [stderr]     |             ^^ help: consider using `_r3` instead
Dec 12 23:30:43.935 INFO [stderr] 
Dec 12 23:30:43.935 INFO [stderr] warning: unused variable: `r4`
Dec 12 23:30:43.935 INFO [stderr]    --> src/main.rs:110:9
Dec 12 23:30:43.935 INFO [stderr]     |
Dec 12 23:30:43.936 INFO [stderr] 110 |     let r4 = &mut s3;
Dec 12 23:30:43.936 INFO [stderr]     |         ^^ help: consider using `_r4` instead
Dec 12 23:30:43.936 INFO [stderr] 
Dec 12 23:30:43.936 INFO [stderr] warning: unused variable: `r1`
Dec 12 23:30:43.936 INFO [stderr]    --> src/main.rs:113:9
Dec 12 23:30:43.936 INFO [stderr]     |
Dec 12 23:30:43.936 INFO [stderr] 113 |     let r1 = &s; // immutable ref
Dec 12 23:30:43.936 INFO [stderr]     |         ^^ help: consider using `_r1` instead
Dec 12 23:30:43.936 INFO [stderr] 
Dec 12 23:30:43.936 INFO [stderr] warning: unused variable: `r2`
Dec 12 23:30:43.936 INFO [stderr]    --> src/main.rs:114:9
Dec 12 23:30:43.936 INFO [stderr]     |
Dec 12 23:30:43.936 INFO [stderr] 114 |     let r2 = &s; // second because as many refs can read the same data safely
Dec 12 23:30:43.936 INFO [stderr]     |         ^^ help: consider using `_r2` instead
Dec 12 23:30:43.936 INFO [stderr] 
Dec 12 23:30:43.936 INFO [stderr] warning: unused variable: `slice`
Dec 12 23:30:43.936 INFO [stderr]    --> src/main.rs:140:9
Dec 12 23:30:43.936 INFO [stderr]     |
Dec 12 23:30:43.936 INFO [stderr] 140 |     let slice = &s[0..2];   // same
Dec 12 23:30:43.936 INFO [stderr]     |         ^^^^^ help: consider using `_slice` instead
Dec 12 23:30:43.936 INFO [stderr] 
Dec 12 23:30:43.936 INFO [stderr] warning: unused variable: `slice`
Dec 12 23:30:43.936 INFO [stderr]    --> src/main.rs:141:9
Dec 12 23:30:43.936 INFO [stderr]     |
Dec 12 23:30:43.936 INFO [stderr] 141 |     let slice = &s[..2];    // same
Dec 12 23:30:43.936 INFO [stderr]     |         ^^^^^ help: consider using `_slice` instead
Dec 12 23:30:43.936 INFO [stderr] 
Dec 12 23:30:43.936 INFO [stderr] warning: unused variable: `slice`
Dec 12 23:30:43.936 INFO [stderr]    --> src/main.rs:145:9
Dec 12 23:30:43.936 INFO [stderr]     |
Dec 12 23:30:43.936 INFO [stderr] 145 |     let slice = &s[2..len]; // same
Dec 12 23:30:43.936 INFO [stderr]     |         ^^^^^ help: consider using `_slice` instead
Dec 12 23:30:43.936 INFO [stderr] 
Dec 12 23:30:43.936 INFO [stderr] warning: unused variable: `slice`
Dec 12 23:30:43.936 INFO [stderr]    --> src/main.rs:146:9
Dec 12 23:30:43.936 INFO [stderr]     |
Dec 12 23:30:43.936 INFO [stderr] 146 |     let slice = &s[2..];    // same
Dec 12 23:30:43.936 INFO [stderr]     |         ^^^^^ help: consider using `_slice` instead
Dec 12 23:30:43.936 INFO [stderr] 
Dec 12 23:30:43.936 INFO [stderr] warning: unused variable: `slice`
Dec 12 23:30:43.936 INFO [stderr]    --> src/main.rs:148:9
Dec 12 23:30:43.936 INFO [stderr]     |
Dec 12 23:30:43.936 INFO [stderr] 148 |     let slice = &s[0..len]; // same
Dec 12 23:30:43.936 INFO [stderr]     |         ^^^^^ help: consider using `_slice` instead
Dec 12 23:30:43.936 INFO [stderr] 
Dec 12 23:30:43.936 INFO [stderr] warning: unused variable: `slice`
Dec 12 23:30:43.936 INFO [stderr]    --> src/main.rs:149:9
Dec 12 23:30:43.936 INFO [stderr]     |
Dec 12 23:30:43.936 INFO [stderr] 149 |     let slice = &s[..];     // same
Dec 12 23:30:43.936 INFO [stderr]     |         ^^^^^ help: consider using `_slice` instead
Dec 12 23:30:43.936 INFO [stderr] 
Dec 12 23:30:43.936 INFO [stderr] warning: unused variable: `slice`
Dec 12 23:30:43.936 INFO [stderr]    --> src/main.rs:166:9
Dec 12 23:30:43.936 INFO [stderr]     |
Dec 12 23:30:43.936 INFO [stderr] 166 |     let slice = &a[0..2];
Dec 12 23:30:43.936 INFO [stderr]     |         ^^^^^ help: consider using `_slice` instead
Dec 12 23:30:43.936 INFO [stderr] 
Dec 12 23:30:43.951 INFO [stderr] warning: variable does not need to be mutable
Dec 12 23:30:43.951 INFO [stderr]    --> src/main.rs:112:9
Dec 12 23:30:43.951 INFO [stderr]     |
Dec 12 23:30:43.951 INFO [stderr] 112 |     let mut s = String::from("hello s");
Dec 12 23:30:43.951 INFO [stderr]     |         ----^
Dec 12 23:30:43.951 INFO [stderr]     |         |
Dec 12 23:30:43.951 INFO [stderr]     |         help: remove this `mut`
Dec 12 23:30:43.951 INFO [stderr]     |
Dec 12 23:30:43.951 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 12 23:30:43.951 INFO [stderr] 
Dec 12 23:30:44.223 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.50s
Dec 12 23:30:44.225 INFO [stderr] su: No module specific data is present
Dec 12 23:30:44.668 INFO running `"docker" "inspect" "b74eb1dddab4572eba379576c6d415d6c14a408a89b5407786187ab492570114"`
Dec 12 23:30:44.785 INFO running `"docker" "rm" "-f" "b74eb1dddab4572eba379576c6d415d6c14a408a89b5407786187ab492570114"`
Dec 12 23:30:44.882 INFO [stdout] b74eb1dddab4572eba379576c6d415d6c14a408a89b5407786187ab492570114
Dec 12 23:30:44.884 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-5/try#aa49d8ef14939ddec0e34b346b60174a5673d48f:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-5/pr-56550/try#aa49d8ef14939ddec0e34b346b60174a5673d48f:/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 +aa49d8ef14939ddec0e34b346b60174a5673d48f-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"`
Dec 12 23:30:45.111 INFO [stdout] 9f06887897d0e61efe9d514e8f24d0e415475fca638aee67ed30174fc3d88e36
Dec 12 23:30:45.113 INFO running `"docker" "start" "-a" "9f06887897d0e61efe9d514e8f24d0e415475fca638aee67ed30174fc3d88e36"`
Dec 12 23:30:45.518 INFO [stderr] usermod: no changes
Dec 12 23:30:45.555 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
Dec 12 23:30:45.555 INFO [stdout] 
Dec 12 23:30:45.555 INFO [stderr]      Running /target/debug/deps/ownership-d7e21fff9df1cc7f
Dec 12 23:30:45.555 INFO [stdout] running 0 tests
Dec 12 23:30:45.555 INFO [stderr] su: No module specific data is present
Dec 12 23:30:45.555 INFO [stdout] 
Dec 12 23:30:45.555 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 12 23:30:45.555 INFO [stdout] 
Dec 12 23:30:45.876 INFO running `"docker" "inspect" "9f06887897d0e61efe9d514e8f24d0e415475fca638aee67ed30174fc3d88e36"`
Dec 12 23:30:45.972 INFO running `"docker" "rm" "-f" "9f06887897d0e61efe9d514e8f24d0e415475fca638aee67ed30174fc3d88e36"`
Dec 12 23:30:46.048 INFO [stdout] 9f06887897d0e61efe9d514e8f24d0e415475fca638aee67ed30174fc3d88e36