Dec 11 23:41:22.086 INFO checking VitalyAnkh/learn_error_handling against try#aa9aa79c3c583aab59ac9134542d60a780c35e2e for pr-56677
Dec 11 23:41:22.086 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56677/worker-4/try#aa9aa79c3c583aab59ac9134542d60a780c35e2e:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-4/pr-56677/try#aa9aa79c3c583aab59ac9134542d60a780c35e2e:/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 +aa9aa79c3c583aab59ac9134542d60a780c35e2e-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 11 23:41:22.640 INFO [stdout] 14a8402be8595ecdccf4ce080301474f604c4067c266285175710b8ff0c01f2e
Dec 11 23:41:22.642 INFO running `"docker" "start" "-a" "14a8402be8595ecdccf4ce080301474f604c4067c266285175710b8ff0c01f2e"`
Dec 11 23:41:23.798 INFO [stderr] usermod: no changes
Dec 11 23:41:23.888 INFO [stderr]     Checking learn_error_handling v0.1.0 (/source)
Dec 11 23:41:24.308 INFO [stderr] warning: unused imports: `Cons`, `Nil`
Dec 11 23:41:24.308 INFO [stderr]  --> src/smart_pointer/rc.rs:7:18
Dec 11 23:41:24.308 INFO [stderr]   |
Dec 11 23:41:24.308 INFO [stderr] 7 | use self::List::{Cons,Nil};
Dec 11 23:41:24.308 INFO [stderr]   |                  ^^^^ ^^^
Dec 11 23:41:24.308 INFO [stderr]   |
Dec 11 23:41:24.308 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 11 23:41:24.308 INFO [stderr] 
Dec 11 23:41:24.337 INFO [stderr] warning: struct is never constructed: `Guess`
Dec 11 23:41:24.337 INFO [stderr]  --> src/read/mod.rs:5:1
Dec 11 23:41:24.338 INFO [stderr]   |
Dec 11 23:41:24.338 INFO [stderr] 5 | struct Guess {
Dec 11 23:41:24.338 INFO [stderr]   | ^^^^^^^^^^^^
Dec 11 23:41:24.338 INFO [stderr]   |
Dec 11 23:41:24.338 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 11 23:41:24.338 INFO [stderr] 
Dec 11 23:41:24.338 INFO [stderr] warning: method is never used: `new`
Dec 11 23:41:24.338 INFO [stderr]   --> src/read/mod.rs:10:5
Dec 11 23:41:24.339 INFO [stderr]    |
Dec 11 23:41:24.339 INFO [stderr] 10 |     fn new(value: u32) -> Guess {
Dec 11 23:41:24.339 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 23:41:24.339 INFO [stderr] 
Dec 11 23:41:24.339 INFO [stderr] warning: enum is never used: `List`
Dec 11 23:41:24.339 INFO [stderr]  --> src/smart_pointer/rc.rs:1:1
Dec 11 23:41:24.339 INFO [stderr]   |
Dec 11 23:41:24.339 INFO [stderr] 1 | enum List{
Dec 11 23:41:24.339 INFO [stderr]   | ^^^^^^^^^
Dec 11 23:41:24.339 INFO [stderr] 
Dec 11 23:41:24.340 INFO [stderr] warning: comparison is useless due to type limits
Dec 11 23:41:24.342 INFO [stderr]   --> src/read/mod.rs:11:12
Dec 11 23:41:24.342 INFO [stderr]    |
Dec 11 23:41:24.342 INFO [stderr] 11 |         if value < 0 || value > 100 {
Dec 11 23:41:24.342 INFO [stderr]    |            ^^^^^^^^^
Dec 11 23:41:24.342 INFO [stderr]    |
Dec 11 23:41:24.342 INFO [stderr]    = note: #[warn(unused_comparisons)] on by default
Dec 11 23:41:24.342 INFO [stderr] 
Dec 11 23:41:25.145 INFO [stderr] warning: unused variable: `b`
Dec 11 23:41:25.145 INFO [stderr]   --> src/smart_pointer/rc.rs:12:9
Dec 11 23:41:25.145 INFO [stderr]    |
Dec 11 23:41:25.145 INFO [stderr] 12 |     let b = Cons(2,Rc::clone(&a));
Dec 11 23:41:25.145 INFO [stderr]    |         ^ help: consider using `_b` instead
Dec 11 23:41:25.145 INFO [stderr]    |
Dec 11 23:41:25.145 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 11 23:41:25.145 INFO [stderr] 
Dec 11 23:41:25.145 INFO [stderr] warning: unused variable: `y`
Dec 11 23:41:25.145 INFO [stderr]  --> src/smart_pointer/ref_cell.rs:4:13
Dec 11 23:41:25.145 INFO [stderr]   |
Dec 11 23:41:25.145 INFO [stderr] 4 |     let mut y =&a;
Dec 11 23:41:25.145 INFO [stderr]   |             ^ help: consider using `_y` instead
Dec 11 23:41:25.145 INFO [stderr] 
Dec 11 23:41:25.180 INFO [stderr] warning: variable does not need to be mutable
Dec 11 23:41:25.180 INFO [stderr]  --> src/smart_pointer/ref_cell.rs:4:9
Dec 11 23:41:25.180 INFO [stderr]   |
Dec 11 23:41:25.180 INFO [stderr] 4 |     let mut y =&a;
Dec 11 23:41:25.180 INFO [stderr]   |         ----^
Dec 11 23:41:25.180 INFO [stderr]   |         |
Dec 11 23:41:25.180 INFO [stderr]   |         help: remove this `mut`
Dec 11 23:41:25.180 INFO [stderr]   |
Dec 11 23:41:25.180 INFO [stderr]   = note: #[warn(unused_mut)] on by default
Dec 11 23:41:25.180 INFO [stderr] 
Dec 11 23:41:25.180 INFO [stderr] warning: field is never used: `value`
Dec 11 23:41:25.181 INFO [stderr]  --> src/read/mod.rs:6:5
Dec 11 23:41:25.181 INFO [stderr]   |
Dec 11 23:41:25.181 INFO [stderr] 6 |     value: u32
Dec 11 23:41:25.181 INFO [stderr]   |     ^^^^^^^^^^
Dec 11 23:41:25.181 INFO [stderr]   |
Dec 11 23:41:25.181 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 11 23:41:25.182 INFO [stderr] 
Dec 11 23:41:25.182 INFO [stderr] warning: comparison is useless due to type limits
Dec 11 23:41:25.182 INFO [stderr]   --> src/read/mod.rs:11:12
Dec 11 23:41:25.182 INFO [stderr]    |
Dec 11 23:41:25.182 INFO [stderr] 11 |         if value < 0 || value > 100 {
Dec 11 23:41:25.182 INFO [stderr]    |            ^^^^^^^^^
Dec 11 23:41:25.182 INFO [stderr]    |
Dec 11 23:41:25.183 INFO [stderr]    = note: #[warn(unused_comparisons)] on by default
Dec 11 23:41:25.183 INFO [stderr] 
Dec 11 23:41:25.912 INFO [stderr] warning: unused variable: `y`
Dec 11 23:41:25.912 INFO [stderr]   --> tests/integration_test.rs:11:9
Dec 11 23:41:25.912 INFO [stderr]    |
Dec 11 23:41:25.912 INFO [stderr] 11 |     let y =&a;
Dec 11 23:41:25.912 INFO [stderr]    |         ^ help: consider using `_y` instead
Dec 11 23:41:25.913 INFO [stderr]    |
Dec 11 23:41:25.913 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 11 23:41:25.913 INFO [stderr] 
Dec 11 23:41:25.915 INFO [stderr] warning: function is never used: `it_add_two`
Dec 11 23:41:25.915 INFO [stderr]  --> tests/integration_test.rs:5:1
Dec 11 23:41:25.915 INFO [stderr]   |
Dec 11 23:41:25.915 INFO [stderr] 5 | fn it_add_two(){
Dec 11 23:41:25.916 INFO [stderr]   | ^^^^^^^^^^^^^^^
Dec 11 23:41:25.916 INFO [stderr]   |
Dec 11 23:41:25.916 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 11 23:41:25.916 INFO [stderr] 
Dec 11 23:41:25.916 INFO [stderr] warning: function is never used: `check_borrow_rules`
Dec 11 23:41:25.916 INFO [stderr]  --> tests/integration_test.rs:9:1
Dec 11 23:41:25.916 INFO [stderr]   |
Dec 11 23:41:25.916 INFO [stderr] 9 | fn check_borrow_rules(){
Dec 11 23:41:25.916 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 23:41:25.916 INFO [stderr] 
Dec 11 23:41:25.944 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.10s
Dec 11 23:41:25.956 INFO [stderr] su: No module specific data is present
Dec 11 23:41:26.790 INFO running `"docker" "inspect" "14a8402be8595ecdccf4ce080301474f604c4067c266285175710b8ff0c01f2e"`
Dec 11 23:41:27.038 INFO running `"docker" "rm" "-f" "14a8402be8595ecdccf4ce080301474f604c4067c266285175710b8ff0c01f2e"`
Dec 11 23:41:27.383 INFO [stdout] 14a8402be8595ecdccf4ce080301474f604c4067c266285175710b8ff0c01f2e