Nov 28 10:30:59.916 INFO checking VitalyAnkh/learn_error_handling against master#0b9f19dff1347e29bf4362ab5a8fab84b43023b5 for pr-56074
Nov 28 10:30:59.916 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56074/worker-3/master#0b9f19dff1347e29bf4362ab5a8fab84b43023b5:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-3/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 28 10:31:00.482 INFO [stdout] c036440b263e1e47b0337f5bff21507ad423e82278b176b2947a302b78771c4c
Nov 28 10:31:00.484 INFO running `"docker" "start" "-a" "c036440b263e1e47b0337f5bff21507ad423e82278b176b2947a302b78771c4c"`
Nov 28 10:31:01.646 INFO [stderr] usermod: no changes
Nov 28 10:31:01.743 INFO [stderr]     Checking learn_error_handling v0.1.0 (/source)
Nov 28 10:31:02.524 INFO [stderr] warning: unused variable: `b`
Nov 28 10:31:02.525 INFO [stderr]   --> src/smart_pointer/rc.rs:12:9
Nov 28 10:31:02.525 INFO [stderr]    |
Nov 28 10:31:02.525 INFO [stderr] 12 |     let b = Cons(2,Rc::clone(&a));
Nov 28 10:31:02.526 INFO [stderr]    |         ^ help: consider using `_b` instead
Nov 28 10:31:02.526 INFO [stderr]    |
Nov 28 10:31:02.526 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Nov 28 10:31:02.526 INFO [stderr] 
Nov 28 10:31:02.527 INFO [stderr] warning: unused variable: `y`
Nov 28 10:31:02.527 INFO [stderr]  --> src/smart_pointer/ref_cell.rs:4:13
Nov 28 10:31:02.527 INFO [stderr]   |
Nov 28 10:31:02.528 INFO [stderr] 4 |     let mut y =&a;
Nov 28 10:31:02.528 INFO [stderr]   |             ^ help: consider using `_y` instead
Nov 28 10:31:02.528 INFO [stderr] 
Nov 28 10:31:02.536 INFO [stderr] warning: unused imports: `Cons`, `Nil`
Nov 28 10:31:02.537 INFO [stderr]  --> src/smart_pointer/rc.rs:7:18
Nov 28 10:31:02.537 INFO [stderr]   |
Nov 28 10:31:02.537 INFO [stderr] 7 | use self::List::{Cons,Nil};
Nov 28 10:31:02.538 INFO [stderr]   |                  ^^^^ ^^^
Nov 28 10:31:02.538 INFO [stderr]   |
Nov 28 10:31:02.538 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Nov 28 10:31:02.539 INFO [stderr] 
Nov 28 10:31:02.552 INFO [stderr] warning: struct is never constructed: `Guess`
Nov 28 10:31:02.553 INFO [stderr]  --> src/read/mod.rs:5:1
Nov 28 10:31:02.553 INFO [stderr]   |
Nov 28 10:31:02.553 INFO [stderr] 5 | struct Guess {
Nov 28 10:31:02.554 INFO [stderr]   | ^^^^^^^^^^^^
Nov 28 10:31:02.554 INFO [stderr]   |
Nov 28 10:31:02.554 INFO [stderr]   = note: #[warn(dead_code)] on by default
Nov 28 10:31:02.555 INFO [stderr] 
Nov 28 10:31:02.555 INFO [stderr] warning: method is never used: `new`
Nov 28 10:31:02.555 INFO [stderr]   --> src/read/mod.rs:10:5
Nov 28 10:31:02.556 INFO [stderr]    |
Nov 28 10:31:02.556 INFO [stderr] 10 |     fn new(value: u32) -> Guess {
Nov 28 10:31:02.556 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 28 10:31:02.556 INFO [stderr] 
Nov 28 10:31:02.557 INFO [stderr] warning: enum is never used: `List`
Nov 28 10:31:02.557 INFO [stderr]  --> src/smart_pointer/rc.rs:1:1
Nov 28 10:31:02.557 INFO [stderr]   |
Nov 28 10:31:02.557 INFO [stderr] 1 | enum List{
Nov 28 10:31:02.558 INFO [stderr]   | ^^^^^^^^^
Nov 28 10:31:02.558 INFO [stderr] 
Nov 28 10:31:02.558 INFO [stderr] warning: comparison is useless due to type limits
Nov 28 10:31:02.558 INFO [stderr]   --> src/read/mod.rs:11:12
Nov 28 10:31:02.559 INFO [stderr]    |
Nov 28 10:31:02.559 INFO [stderr] 11 |         if value < 0 || value > 100 {
Nov 28 10:31:02.559 INFO [stderr]    |            ^^^^^^^^^
Nov 28 10:31:02.559 INFO [stderr]    |
Nov 28 10:31:02.559 INFO [stderr]    = note: #[warn(unused_comparisons)] on by default
Nov 28 10:31:02.560 INFO [stderr] 
Nov 28 10:31:02.560 INFO [stderr] warning: variable does not need to be mutable
Nov 28 10:31:02.560 INFO [stderr]  --> src/smart_pointer/ref_cell.rs:4:9
Nov 28 10:31:02.560 INFO [stderr]   |
Nov 28 10:31:02.561 INFO [stderr] 4 |     let mut y =&a;
Nov 28 10:31:02.561 INFO [stderr]   |         ----^
Nov 28 10:31:02.561 INFO [stderr]   |         |
Nov 28 10:31:02.562 INFO [stderr]   |         help: remove this `mut`
Nov 28 10:31:02.562 INFO [stderr]   |
Nov 28 10:31:02.562 INFO [stderr]   = note: #[warn(unused_mut)] on by default
Nov 28 10:31:02.562 INFO [stderr] 
Nov 28 10:31:02.563 INFO [stderr] warning: field is never used: `value`
Nov 28 10:31:02.563 INFO [stderr]  --> src/read/mod.rs:6:5
Nov 28 10:31:02.563 INFO [stderr]   |
Nov 28 10:31:02.564 INFO [stderr] 6 |     value: u32
Nov 28 10:31:02.564 INFO [stderr]   |     ^^^^^^^^^^
Nov 28 10:31:02.567 INFO [stderr]   |
Nov 28 10:31:02.567 INFO [stderr]   = note: #[warn(dead_code)] on by default
Nov 28 10:31:02.567 INFO [stderr] 
Nov 28 10:31:02.568 INFO [stderr] warning: comparison is useless due to type limits
Nov 28 10:31:02.568 INFO [stderr]   --> src/read/mod.rs:11:12
Nov 28 10:31:02.568 INFO [stderr]    |
Nov 28 10:31:02.569 INFO [stderr] 11 |         if value < 0 || value > 100 {
Nov 28 10:31:02.569 INFO [stderr]    |            ^^^^^^^^^
Nov 28 10:31:02.569 INFO [stderr]    |
Nov 28 10:31:02.569 INFO [stderr]    = note: #[warn(unused_comparisons)] on by default
Nov 28 10:31:02.570 INFO [stderr] 
Nov 28 10:31:03.402 INFO [stderr] warning: unused variable: `y`
Nov 28 10:31:03.402 INFO [stderr]   --> tests/integration_test.rs:11:9
Nov 28 10:31:03.402 INFO [stderr]    |
Nov 28 10:31:03.402 INFO [stderr] 11 |     let y =&a;
Nov 28 10:31:03.402 INFO [stderr]    |         ^ help: consider using `_y` instead
Nov 28 10:31:03.402 INFO [stderr]    |
Nov 28 10:31:03.402 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Nov 28 10:31:03.402 INFO [stderr] 
Nov 28 10:31:03.406 INFO [stderr] warning: function is never used: `it_add_two`
Nov 28 10:31:03.406 INFO [stderr]  --> tests/integration_test.rs:5:1
Nov 28 10:31:03.406 INFO [stderr]   |
Nov 28 10:31:03.406 INFO [stderr] 5 | fn it_add_two(){
Nov 28 10:31:03.406 INFO [stderr]   | ^^^^^^^^^^^^^^^
Nov 28 10:31:03.406 INFO [stderr]   |
Nov 28 10:31:03.406 INFO [stderr]   = note: #[warn(dead_code)] on by default
Nov 28 10:31:03.406 INFO [stderr] 
Nov 28 10:31:03.406 INFO [stderr] warning: function is never used: `check_borrow_rules`
Nov 28 10:31:03.406 INFO [stderr]  --> tests/integration_test.rs:9:1
Nov 28 10:31:03.406 INFO [stderr]   |
Nov 28 10:31:03.406 INFO [stderr] 9 | fn check_borrow_rules(){
Nov 28 10:31:03.406 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
Nov 28 10:31:03.406 INFO [stderr] 
Nov 28 10:31:03.580 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.88s
Nov 28 10:31:03.580 INFO [stderr] su: No module specific data is present
Nov 28 10:31:04.386 INFO running `"docker" "inspect" "c036440b263e1e47b0337f5bff21507ad423e82278b176b2947a302b78771c4c"`
Nov 28 10:31:04.714 INFO running `"docker" "rm" "-f" "c036440b263e1e47b0337f5bff21507ad423e82278b176b2947a302b78771c4c"`
Nov 28 10:31:05.105 INFO [stdout] c036440b263e1e47b0337f5bff21507ad423e82278b176b2947a302b78771c4c