Dec 19 21:24:29.244 INFO checking VitalyAnkh/learn_error_handling against try#e70472fc501b855c9080f3772432c10fe20b8866 for pr-56955
Dec 19 21:24:29.244 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-5/try#e70472fc501b855c9080f3772432c10fe20b8866:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/gh/VitalyAnkh/learn_error_handling:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+e70472fc501b855c9080f3772432c10fe20b8866-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 21:24:29.745 INFO [stdout] cb71787b0fbe4325d9fb91d1f84764a592d55a82ff9f653e3123feb62f041d88
Dec 19 21:24:29.747 INFO running `"docker" "start" "-a" "cb71787b0fbe4325d9fb91d1f84764a592d55a82ff9f653e3123feb62f041d88"`
Dec 19 21:24:30.508 INFO [stderr]     Checking learn_error_handling v0.1.0 (/opt/crater/workdir)
Dec 19 21:24:30.648 INFO [stderr] warning: unused imports: `Cons`, `Nil`
Dec 19 21:24:30.648 INFO [stderr]  --> src/smart_pointer/rc.rs:7:18
Dec 19 21:24:30.648 INFO [stderr]   |
Dec 19 21:24:30.648 INFO [stderr] 7 | use self::List::{Cons,Nil};
Dec 19 21:24:30.648 INFO [stderr]   |                  ^^^^ ^^^
Dec 19 21:24:30.648 INFO [stderr]   |
Dec 19 21:24:30.648 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 19 21:24:30.648 INFO [stderr] 
Dec 19 21:24:30.676 INFO [stderr] warning: struct is never constructed: `Guess`
Dec 19 21:24:30.676 INFO [stderr]  --> src/read/mod.rs:5:1
Dec 19 21:24:30.676 INFO [stderr]   |
Dec 19 21:24:30.676 INFO [stderr] 5 | struct Guess {
Dec 19 21:24:30.676 INFO [stderr]   | ^^^^^^^^^^^^
Dec 19 21:24:30.676 INFO [stderr]   |
Dec 19 21:24:30.676 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 19 21:24:30.676 INFO [stderr] 
Dec 19 21:24:30.676 INFO [stderr] warning: method is never used: `new`
Dec 19 21:24:30.676 INFO [stderr]   --> src/read/mod.rs:10:5
Dec 19 21:24:30.676 INFO [stderr]    |
Dec 19 21:24:30.676 INFO [stderr] 10 |     fn new(value: u32) -> Guess {
Dec 19 21:24:30.676 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 21:24:30.676 INFO [stderr] 
Dec 19 21:24:30.676 INFO [stderr] warning: enum is never used: `List`
Dec 19 21:24:30.676 INFO [stderr]  --> src/smart_pointer/rc.rs:1:1
Dec 19 21:24:30.676 INFO [stderr]   |
Dec 19 21:24:30.676 INFO [stderr] 1 | enum List{
Dec 19 21:24:30.676 INFO [stderr]   | ^^^^^^^^^
Dec 19 21:24:30.676 INFO [stderr] 
Dec 19 21:24:30.676 INFO [stderr] warning: comparison is useless due to type limits
Dec 19 21:24:30.676 INFO [stderr]   --> src/read/mod.rs:11:12
Dec 19 21:24:30.676 INFO [stderr]    |
Dec 19 21:24:30.676 INFO [stderr] 11 |         if value < 0 || value > 100 {
Dec 19 21:24:30.676 INFO [stderr]    |            ^^^^^^^^^
Dec 19 21:24:30.676 INFO [stderr]    |
Dec 19 21:24:30.676 INFO [stderr]    = note: #[warn(unused_comparisons)] on by default
Dec 19 21:24:30.676 INFO [stderr] 
Dec 19 21:24:30.760 INFO [stderr] warning: unused variable: `b`
Dec 19 21:24:30.760 INFO [stderr]   --> src/smart_pointer/rc.rs:12:9
Dec 19 21:24:30.760 INFO [stderr]    |
Dec 19 21:24:30.760 INFO [stderr] 12 |     let b = Cons(2,Rc::clone(&a));
Dec 19 21:24:30.760 INFO [stderr]    |         ^ help: consider using `_b` instead
Dec 19 21:24:30.760 INFO [stderr]    |
Dec 19 21:24:30.760 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 19 21:24:30.760 INFO [stderr] 
Dec 19 21:24:30.760 INFO [stderr] warning: unused variable: `y`
Dec 19 21:24:30.760 INFO [stderr]  --> src/smart_pointer/ref_cell.rs:4:13
Dec 19 21:24:30.760 INFO [stderr]   |
Dec 19 21:24:30.760 INFO [stderr] 4 |     let mut y =&a;
Dec 19 21:24:30.760 INFO [stderr]   |             ^ help: consider using `_y` instead
Dec 19 21:24:30.760 INFO [stderr] 
Dec 19 21:24:30.768 INFO [stderr] warning: variable does not need to be mutable
Dec 19 21:24:30.768 INFO [stderr]  --> src/smart_pointer/ref_cell.rs:4:9
Dec 19 21:24:30.768 INFO [stderr]   |
Dec 19 21:24:30.768 INFO [stderr] 4 |     let mut y =&a;
Dec 19 21:24:30.768 INFO [stderr]   |         ----^
Dec 19 21:24:30.768 INFO [stderr]   |         |
Dec 19 21:24:30.768 INFO [stderr]   |         help: remove this `mut`
Dec 19 21:24:30.768 INFO [stderr]   |
Dec 19 21:24:30.768 INFO [stderr]   = note: #[warn(unused_mut)] on by default
Dec 19 21:24:30.768 INFO [stderr] 
Dec 19 21:24:30.768 INFO [stderr] warning: field is never used: `value`
Dec 19 21:24:30.768 INFO [stderr]  --> src/read/mod.rs:6:5
Dec 19 21:24:30.768 INFO [stderr]   |
Dec 19 21:24:30.768 INFO [stderr] 6 |     value: u32
Dec 19 21:24:30.768 INFO [stderr]   |     ^^^^^^^^^^
Dec 19 21:24:30.768 INFO [stderr]   |
Dec 19 21:24:30.768 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 19 21:24:30.768 INFO [stderr] 
Dec 19 21:24:30.768 INFO [stderr] warning: comparison is useless due to type limits
Dec 19 21:24:30.768 INFO [stderr]   --> src/read/mod.rs:11:12
Dec 19 21:24:30.768 INFO [stderr]    |
Dec 19 21:24:30.768 INFO [stderr] 11 |         if value < 0 || value > 100 {
Dec 19 21:24:30.768 INFO [stderr]    |            ^^^^^^^^^
Dec 19 21:24:30.768 INFO [stderr]    |
Dec 19 21:24:30.768 INFO [stderr]    = note: #[warn(unused_comparisons)] on by default
Dec 19 21:24:30.768 INFO [stderr] 
Dec 19 21:24:30.900 INFO [stderr] warning: unused variable: `y`
Dec 19 21:24:30.900 INFO [stderr]   --> tests/integration_test.rs:11:9
Dec 19 21:24:30.900 INFO [stderr]    |
Dec 19 21:24:30.900 INFO [stderr] 11 |     let y =&a;
Dec 19 21:24:30.900 INFO [stderr]    |         ^ help: consider using `_y` instead
Dec 19 21:24:30.900 INFO [stderr]    |
Dec 19 21:24:30.900 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 19 21:24:30.900 INFO [stderr] 
Dec 19 21:24:30.903 INFO [stderr] warning: function is never used: `it_add_two`
Dec 19 21:24:30.903 INFO [stderr]  --> tests/integration_test.rs:5:1
Dec 19 21:24:30.903 INFO [stderr]   |
Dec 19 21:24:30.903 INFO [stderr] 5 | fn it_add_two(){
Dec 19 21:24:30.903 INFO [stderr]   | ^^^^^^^^^^^^^^^
Dec 19 21:24:30.908 INFO [stderr]   |
Dec 19 21:24:30.908 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 19 21:24:30.908 INFO [stderr] 
Dec 19 21:24:30.908 INFO [stderr] warning: function is never used: `check_borrow_rules`
Dec 19 21:24:30.908 INFO [stderr]  --> tests/integration_test.rs:9:1
Dec 19 21:24:30.908 INFO [stderr]   |
Dec 19 21:24:30.908 INFO [stderr] 9 | fn check_borrow_rules(){
Dec 19 21:24:30.908 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 21:24:30.908 INFO [stderr] 
Dec 19 21:24:31.021 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.52s
Dec 19 21:24:31.562 INFO running `"docker" "inspect" "cb71787b0fbe4325d9fb91d1f84764a592d55a82ff9f653e3123feb62f041d88"`
Dec 19 21:24:31.741 INFO running `"docker" "rm" "-f" "cb71787b0fbe4325d9fb91d1f84764a592d55a82ff9f653e3123feb62f041d88"`
Dec 19 21:24:31.860 INFO [stdout] cb71787b0fbe4325d9fb91d1f84764a592d55a82ff9f653e3123feb62f041d88