Dec 04 08:14:46.421 INFO checking tperdue321/rust_basics against master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc for pr-56481
Dec 04 08:14:46.421 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56481/worker-4/master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-4/pr-56481/master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc:/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 +c8ae2de8363be088604ffa2ccba84ff7ad7250bc-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"`
Dec 04 08:14:46.827 INFO [stdout] 9f2aca3b8fa5819ec653e836568a72e0b51e6ec53857ba6f9e3cd637c9cde4eb
Dec 04 08:14:46.829 INFO running `"docker" "start" "-a" "9f2aca3b8fa5819ec653e836568a72e0b51e6ec53857ba6f9e3cd637c9cde4eb"`
Dec 04 08:14:48.143 INFO [stderr] usermod: no changes
Dec 04 08:14:48.223 INFO [stderr]     Checking basics v0.1.0 (/source)
Dec 04 08:14:48.520 INFO [stderr] warning: unused variable: `a`
Dec 04 08:14:48.520 INFO [stderr]  --> src/main.rs:9:9
Dec 04 08:14:48.520 INFO [stderr]   |
Dec 04 08:14:48.520 INFO [stderr] 9 |     let a: i32 = 1;
Dec 04 08:14:48.520 INFO [stderr]   |         ^ help: consider using `_a` instead
Dec 04 08:14:48.520 INFO [stderr]   |
Dec 04 08:14:48.520 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Dec 04 08:14:48.520 INFO [stderr] 
Dec 04 08:14:48.520 INFO [stderr] warning: variable `b` is assigned to, but never used
Dec 04 08:14:48.520 INFO [stderr]   --> src/main.rs:14:13
Dec 04 08:14:48.520 INFO [stderr]    |
Dec 04 08:14:48.520 INFO [stderr] 14 |     let mut b: i32 = 15;
Dec 04 08:14:48.520 INFO [stderr]    |             ^
Dec 04 08:14:48.520 INFO [stderr]    |
Dec 04 08:14:48.520 INFO [stderr]    = note: consider using `_b` instead
Dec 04 08:14:48.520 INFO [stderr] 
Dec 04 08:14:48.520 INFO [stderr] warning: value assigned to `b` is never read
Dec 04 08:14:48.520 INFO [stderr]   --> src/main.rs:15:5
Dec 04 08:14:48.520 INFO [stderr]    |
Dec 04 08:14:48.520 INFO [stderr] 15 |     b = 25;
Dec 04 08:14:48.520 INFO [stderr]    |     ^
Dec 04 08:14:48.520 INFO [stderr]    |
Dec 04 08:14:48.520 INFO [stderr]    = note: #[warn(unused_assignments)] on by default
Dec 04 08:14:48.520 INFO [stderr] 
Dec 04 08:14:48.520 INFO [stderr] warning: unused variable: `x`
Dec 04 08:14:48.520 INFO [stderr]   --> src/main.rs:17:9
Dec 04 08:14:48.520 INFO [stderr]    |
Dec 04 08:14:48.520 INFO [stderr] 17 |     let x: i32; // bindings need to be given a starting val. this is bad
Dec 04 08:14:48.520 INFO [stderr]    |         ^ help: consider using `_x` instead
Dec 04 08:14:48.520 INFO [stderr] 
Dec 04 08:14:48.520 INFO [stderr] warning: value assigned to `x` is never read
Dec 04 08:14:48.520 INFO [stderr]   --> src/main.rs:38:13
Dec 04 08:14:48.520 INFO [stderr]    |
Dec 04 08:14:48.520 INFO [stderr] 38 |     let mut x: i32 = 1;
Dec 04 08:14:48.520 INFO [stderr]    |             ^
Dec 04 08:14:48.520 INFO [stderr] 
Dec 04 08:14:48.520 INFO [stderr] warning: unused variable: `y`
Dec 04 08:14:48.520 INFO [stderr]   --> src/main.rs:42:9
Dec 04 08:14:48.520 INFO [stderr]    |
Dec 04 08:14:48.520 INFO [stderr] 42 |     let y = 4;
Dec 04 08:14:48.520 INFO [stderr]    |         ^ help: consider using `_y` instead
Dec 04 08:14:48.520 INFO [stderr] 
Dec 04 08:14:48.520 INFO [stderr] warning: unused variable: `y`
Dec 04 08:14:48.520 INFO [stderr]   --> src/main.rs:45:9
Dec 04 08:14:48.520 INFO [stderr]    |
Dec 04 08:14:48.520 INFO [stderr] 45 |     let y = "I can also be bound to text!"; // `y` is now of a different type.
Dec 04 08:14:48.520 INFO [stderr]    |         ^ help: consider using `_y` instead
Dec 04 08:14:48.520 INFO [stderr] 
Dec 04 08:14:48.520 INFO [stderr] warning: unused variable: `x`
Dec 04 08:14:48.520 INFO [stderr]   --> src/main.rs:60:9
Dec 04 08:14:48.520 INFO [stderr]    |
Dec 04 08:14:48.520 INFO [stderr] 60 |     let x = return_int_plus_1(1);
Dec 04 08:14:48.520 INFO [stderr]    |         ^ help: consider using `_x` instead
Dec 04 08:14:48.520 INFO [stderr] 
Dec 04 08:14:48.527 INFO [stderr] warning: unused variable: `a`
Dec 04 08:14:48.527 INFO [stderr]  --> src/main.rs:9:9
Dec 04 08:14:48.527 INFO [stderr]   |
Dec 04 08:14:48.527 INFO [stderr] 9 |     let a: i32 = 1;
Dec 04 08:14:48.527 INFO [stderr]   |         ^ help: consider using `_a` instead
Dec 04 08:14:48.527 INFO [stderr]   |
Dec 04 08:14:48.527 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Dec 04 08:14:48.527 INFO [stderr] 
Dec 04 08:14:48.527 INFO [stderr] warning: variable `b` is assigned to, but never used
Dec 04 08:14:48.527 INFO [stderr]   --> src/main.rs:14:13
Dec 04 08:14:48.527 INFO [stderr]    |
Dec 04 08:14:48.527 INFO [stderr] 14 |     let mut b: i32 = 15;
Dec 04 08:14:48.527 INFO [stderr]    |             ^
Dec 04 08:14:48.527 INFO [stderr]    |
Dec 04 08:14:48.527 INFO [stderr]    = note: consider using `_b` instead
Dec 04 08:14:48.527 INFO [stderr] 
Dec 04 08:14:48.527 INFO [stderr] warning: value assigned to `b` is never read
Dec 04 08:14:48.527 INFO [stderr]   --> src/main.rs:15:5
Dec 04 08:14:48.527 INFO [stderr]    |
Dec 04 08:14:48.527 INFO [stderr] 15 |     b = 25;
Dec 04 08:14:48.527 INFO [stderr]    |     ^
Dec 04 08:14:48.527 INFO [stderr]    |
Dec 04 08:14:48.527 INFO [stderr]    = note: #[warn(unused_assignments)] on by default
Dec 04 08:14:48.527 INFO [stderr] 
Dec 04 08:14:48.527 INFO [stderr] warning: unused variable: `x`
Dec 04 08:14:48.527 INFO [stderr]   --> src/main.rs:17:9
Dec 04 08:14:48.527 INFO [stderr]    |
Dec 04 08:14:48.527 INFO [stderr] 17 |     let x: i32; // bindings need to be given a starting val. this is bad
Dec 04 08:14:48.527 INFO [stderr]    |         ^ help: consider using `_x` instead
Dec 04 08:14:48.527 INFO [stderr] 
Dec 04 08:14:48.527 INFO [stderr] warning: value assigned to `x` is never read
Dec 04 08:14:48.527 INFO [stderr]   --> src/main.rs:38:13
Dec 04 08:14:48.527 INFO [stderr]    |
Dec 04 08:14:48.527 INFO [stderr] 38 |     let mut x: i32 = 1;
Dec 04 08:14:48.527 INFO [stderr]    |             ^
Dec 04 08:14:48.527 INFO [stderr] 
Dec 04 08:14:48.527 INFO [stderr] warning: unused variable: `y`
Dec 04 08:14:48.527 INFO [stderr]   --> src/main.rs:42:9
Dec 04 08:14:48.527 INFO [stderr]    |
Dec 04 08:14:48.528 INFO [stderr] 42 |     let y = 4;
Dec 04 08:14:48.528 INFO [stderr]    |         ^ help: consider using `_y` instead
Dec 04 08:14:48.528 INFO [stderr] 
Dec 04 08:14:48.528 INFO [stderr] warning: unused variable: `y`
Dec 04 08:14:48.528 INFO [stderr]   --> src/main.rs:45:9
Dec 04 08:14:48.528 INFO [stderr]    |
Dec 04 08:14:48.528 INFO [stderr] 45 |     let y = "I can also be bound to text!"; // `y` is now of a different type.
Dec 04 08:14:48.528 INFO [stderr]    |         ^ help: consider using `_y` instead
Dec 04 08:14:48.528 INFO [stderr] 
Dec 04 08:14:48.528 INFO [stderr] warning: unused variable: `x`
Dec 04 08:14:48.528 INFO [stderr]   --> src/main.rs:60:9
Dec 04 08:14:48.528 INFO [stderr]    |
Dec 04 08:14:48.528 INFO [stderr] 60 |     let x = return_int_plus_1(1);
Dec 04 08:14:48.528 INFO [stderr]    |         ^ help: consider using `_x` instead
Dec 04 08:14:48.528 INFO [stderr] 
Dec 04 08:14:48.539 INFO [stderr] warning: function is never used: `diverges`
Dec 04 08:14:48.539 INFO [stderr]   --> src/main.rs:93:1
Dec 04 08:14:48.539 INFO [stderr]    |
Dec 04 08:14:48.539 INFO [stderr] 93 | fn diverges() -> ! {
Dec 04 08:14:48.539 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^
Dec 04 08:14:48.539 INFO [stderr]    |
Dec 04 08:14:48.539 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 04 08:14:48.539 INFO [stderr] 
Dec 04 08:14:48.547 INFO [stderr] warning: function is never used: `diverges`
Dec 04 08:14:48.547 INFO [stderr]   --> src/main.rs:93:1
Dec 04 08:14:48.547 INFO [stderr]    |
Dec 04 08:14:48.547 INFO [stderr] 93 | fn diverges() -> ! {
Dec 04 08:14:48.547 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^
Dec 04 08:14:48.547 INFO [stderr]    |
Dec 04 08:14:48.547 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 04 08:14:48.547 INFO [stderr] 
Dec 04 08:14:48.604 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.43s
Dec 04 08:14:48.611 INFO [stderr] su: No module specific data is present
Dec 04 08:14:49.237 INFO running `"docker" "inspect" "9f2aca3b8fa5819ec653e836568a72e0b51e6ec53857ba6f9e3cd637c9cde4eb"`
Dec 04 08:14:49.565 INFO running `"docker" "rm" "-f" "9f2aca3b8fa5819ec653e836568a72e0b51e6ec53857ba6f9e3cd637c9cde4eb"`
Dec 04 08:14:49.851 INFO [stdout] 9f2aca3b8fa5819ec653e836568a72e0b51e6ec53857ba6f9e3cd637c9cde4eb