Sep 21 11:18:22.238 INFO checking disjoint-set-0.0.2 against master#f7f4c500b46603386e940f116b469c7adc043a6d for pr-54394
Sep 21 11:18:22.238 INFO running: cargo +f7f4c500b46603386e940f116b469c7adc043a6d-alt check --frozen --all --all-targets
Sep 21 11:18:22.238 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-2/pr-54394/master#f7f4c500b46603386e940f116b469c7adc043a6d:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-54394/worker-2/master#f7f4c500b46603386e940f116b469c7adc043a6d:/target:rw,Z" "-v" "/home/ec2-user/crater/./work/local/cargo-home:/cargo-home:ro,Z" "-v" "/home/ec2-user/crater/./work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "CMD=cargo +f7f4c500b46603386e940f116b469c7adc043a6d-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "1536M" "crater"`
Sep 21 11:18:22.400 INFO blam! dce51ee83b99dae3171f070aa0233c99740301a867197426218686a0276be952
Sep 21 11:18:22.401 INFO running `"docker" "start" "-a" "dce51ee83b99dae3171f070aa0233c99740301a867197426218686a0276be952"`
Sep 21 11:18:23.250 INFO kablam! usermod: no changes
Sep 21 11:18:23.288 INFO kablam!     Checking disjoint-set v0.0.2 (/source)
Sep 21 11:18:23.462 INFO kablam! warning: unused import: `std::rc::Rc`
Sep 21 11:18:23.462 INFO kablam!  --> src/lib.rs:3:5
Sep 21 11:18:23.462 INFO kablam!   |
Sep 21 11:18:23.462 INFO kablam! 3 | use std::rc::Rc;
Sep 21 11:18:23.462 INFO kablam!   |     ^^^^^^^^^^^
Sep 21 11:18:23.462 INFO kablam!   |
Sep 21 11:18:23.462 INFO kablam!   = note: #[warn(unused_imports)] on by default
Sep 21 11:18:23.462 INFO kablam! 
Sep 21 11:18:23.489 INFO kablam! warning: unused variable: `p`
Sep 21 11:18:23.489 INFO kablam!   --> src/lib.rs:37:18
Sep 21 11:18:23.489 INFO kablam!    |
Sep 21 11:18:23.489 INFO kablam! 37 |             Some(p) => return,
Sep 21 11:18:23.489 INFO kablam!    |                  ^ help: consider using `_p` instead
Sep 21 11:18:23.489 INFO kablam!    |
Sep 21 11:18:23.489 INFO kablam!    = note: #[warn(unused_variables)] on by default
Sep 21 11:18:23.489 INFO kablam! 
Sep 21 11:18:23.490 INFO kablam! warning: variable does not need to be mutable
Sep 21 11:18:23.490 INFO kablam!   --> src/lib.rs:35:13
Sep 21 11:18:23.491 INFO kablam!    |
Sep 21 11:18:23.491 INFO kablam! 35 |         let mut len = &mut self.set_size;
Sep 21 11:18:23.491 INFO kablam!    |             ----^^^
Sep 21 11:18:23.491 INFO kablam!    |             |
Sep 21 11:18:23.491 INFO kablam!    |             help: remove this `mut`
Sep 21 11:18:23.491 INFO kablam!    |
Sep 21 11:18:23.491 INFO kablam!    = note: #[warn(unused_mut)] on by default
Sep 21 11:18:23.491 INFO kablam! 
Sep 21 11:18:23.491 INFO kablam! warning: variable does not need to be mutable
Sep 21 11:18:23.491 INFO kablam!   --> src/lib.rs:53:13
Sep 21 11:18:23.491 INFO kablam!    |
Sep 21 11:18:23.491 INFO kablam! 53 |         let mut pos: usize;
Sep 21 11:18:23.491 INFO kablam!    |             ----^^^
Sep 21 11:18:23.491 INFO kablam!    |             |
Sep 21 11:18:23.491 INFO kablam!    |             help: remove this `mut`
Sep 21 11:18:23.491 INFO kablam! 
Sep 21 11:18:23.492 INFO kablam! warning: variant is never constructed: `Root`
Sep 21 11:18:23.492 INFO kablam!  --> src/lib.rs:7:5
Sep 21 11:18:23.492 INFO kablam!   |
Sep 21 11:18:23.492 INFO kablam! 7 |     Root(ValueType, u32),
Sep 21 11:18:23.493 INFO kablam!   |     ^^^^^^^^^^^^^^^^^^^^
Sep 21 11:18:23.493 INFO kablam!   |
Sep 21 11:18:23.493 INFO kablam!   = note: #[warn(dead_code)] on by default
Sep 21 11:18:23.493 INFO kablam! 
Sep 21 11:18:23.493 INFO kablam! warning: variant is never constructed: `Link`
Sep 21 11:18:23.493 INFO kablam!  --> src/lib.rs:8:5
Sep 21 11:18:23.493 INFO kablam!   |
Sep 21 11:18:23.493 INFO kablam! 8 |     Link(Box<SetItem<ValueType>>)
Sep 21 11:18:23.493 INFO kablam!   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Sep 21 11:18:23.493 INFO kablam! 
Sep 21 11:18:23.502 INFO kablam! warning: unused import: `std::rc::Rc`
Sep 21 11:18:23.502 INFO kablam!  --> src/lib.rs:3:5
Sep 21 11:18:23.503 INFO kablam!   |
Sep 21 11:18:23.503 INFO kablam! 3 | use std::rc::Rc;
Sep 21 11:18:23.503 INFO kablam!   |     ^^^^^^^^^^^
Sep 21 11:18:23.503 INFO kablam!   |
Sep 21 11:18:23.503 INFO kablam!   = note: #[warn(unused_imports)] on by default
Sep 21 11:18:23.503 INFO kablam! 
Sep 21 11:18:23.532 INFO kablam! warning: unused variable: `p`
Sep 21 11:18:23.532 INFO kablam!   --> src/lib.rs:37:18
Sep 21 11:18:23.532 INFO kablam!    |
Sep 21 11:18:23.532 INFO kablam! 37 |             Some(p) => return,
Sep 21 11:18:23.532 INFO kablam!    |                  ^ help: consider using `_p` instead
Sep 21 11:18:23.532 INFO kablam!    |
Sep 21 11:18:23.532 INFO kablam!    = note: #[warn(unused_variables)] on by default
Sep 21 11:18:23.532 INFO kablam! 
Sep 21 11:18:23.534 INFO kablam! warning: variable does not need to be mutable
Sep 21 11:18:23.534 INFO kablam!   --> src/lib.rs:35:13
Sep 21 11:18:23.534 INFO kablam!    |
Sep 21 11:18:23.534 INFO kablam! 35 |         let mut len = &mut self.set_size;
Sep 21 11:18:23.534 INFO kablam!    |             ----^^^
Sep 21 11:18:23.534 INFO kablam!    |             |
Sep 21 11:18:23.534 INFO kablam!    |             help: remove this `mut`
Sep 21 11:18:23.534 INFO kablam!    |
Sep 21 11:18:23.534 INFO kablam!    = note: #[warn(unused_mut)] on by default
Sep 21 11:18:23.534 INFO kablam! 
Sep 21 11:18:23.534 INFO kablam! warning: variable does not need to be mutable
Sep 21 11:18:23.534 INFO kablam!   --> src/lib.rs:53:13
Sep 21 11:18:23.534 INFO kablam!    |
Sep 21 11:18:23.534 INFO kablam! 53 |         let mut pos: usize;
Sep 21 11:18:23.534 INFO kablam!    |             ----^^^
Sep 21 11:18:23.534 INFO kablam!    |             |
Sep 21 11:18:23.534 INFO kablam!    |             help: remove this `mut`
Sep 21 11:18:23.534 INFO kablam! 
Sep 21 11:18:23.536 INFO kablam! warning: variant is never constructed: `Root`
Sep 21 11:18:23.537 INFO kablam!  --> src/lib.rs:7:5
Sep 21 11:18:23.537 INFO kablam!   |
Sep 21 11:18:23.537 INFO kablam! 7 |     Root(ValueType, u32),
Sep 21 11:18:23.537 INFO kablam!   |     ^^^^^^^^^^^^^^^^^^^^
Sep 21 11:18:23.537 INFO kablam!   |
Sep 21 11:18:23.537 INFO kablam!   = note: #[warn(dead_code)] on by default
Sep 21 11:18:23.537 INFO kablam! 
Sep 21 11:18:23.537 INFO kablam! warning: variant is never constructed: `Link`
Sep 21 11:18:23.537 INFO kablam!  --> src/lib.rs:8:5
Sep 21 11:18:23.537 INFO kablam!   |
Sep 21 11:18:23.537 INFO kablam! 8 |     Link(Box<SetItem<ValueType>>)
Sep 21 11:18:23.537 INFO kablam!   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Sep 21 11:18:23.537 INFO kablam! 
Sep 21 11:18:23.547 INFO kablam! warning: unused `std::result::Result` which must be used
Sep 21 11:18:23.547 INFO kablam!    --> src/lib.rs:106:5
Sep 21 11:18:23.547 INFO kablam!     |
Sep 21 11:18:23.547 INFO kablam! 106 |     ds.union(1, 2);
Sep 21 11:18:23.547 INFO kablam!     |     ^^^^^^^^^^^^^^^
Sep 21 11:18:23.547 INFO kablam!     |
Sep 21 11:18:23.547 INFO kablam!     = note: #[warn(unused_must_use)] on by default
Sep 21 11:18:23.547 INFO kablam!     = note: this `Result` may be an `Err` variant, which should be handled
Sep 21 11:18:23.547 INFO kablam! 
Sep 21 11:18:23.547 INFO kablam! warning: unused `std::result::Result` which must be used
Sep 21 11:18:23.547 INFO kablam!    --> src/lib.rs:107:5
Sep 21 11:18:23.547 INFO kablam!     |
Sep 21 11:18:23.547 INFO kablam! 107 |     ds.union(2, 3);
Sep 21 11:18:23.547 INFO kablam!     |     ^^^^^^^^^^^^^^^
Sep 21 11:18:23.547 INFO kablam!     |
Sep 21 11:18:23.547 INFO kablam!     = note: this `Result` may be an `Err` variant, which should be handled
Sep 21 11:18:23.547 INFO kablam! 
Sep 21 11:18:23.547 INFO kablam! warning: unused `std::result::Result` which must be used
Sep 21 11:18:23.547 INFO kablam!    --> src/lib.rs:118:5
Sep 21 11:18:23.547 INFO kablam!     |
Sep 21 11:18:23.547 INFO kablam! 118 |     ds.union(-1, 4);
Sep 21 11:18:23.547 INFO kablam!     |     ^^^^^^^^^^^^^^^^
Sep 21 11:18:23.547 INFO kablam!     |
Sep 21 11:18:23.547 INFO kablam!     = note: this `Result` may be an `Err` variant, which should be handled
Sep 21 11:18:23.547 INFO kablam! 
Sep 21 11:18:23.547 INFO kablam! warning: unused `std::result::Result` which must be used
Sep 21 11:18:23.547 INFO kablam!    --> src/lib.rs:119:5
Sep 21 11:18:23.547 INFO kablam!     |
Sep 21 11:18:23.547 INFO kablam! 119 |     ds.union(2, 4);
Sep 21 11:18:23.547 INFO kablam!     |     ^^^^^^^^^^^^^^^
Sep 21 11:18:23.547 INFO kablam!     |
Sep 21 11:18:23.547 INFO kablam!     = note: this `Result` may be an `Err` variant, which should be handled
Sep 21 11:18:23.547 INFO kablam! 
Sep 21 11:18:23.556 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 0.28s
Sep 21 11:18:23.558 INFO kablam! su: No module specific data is present
Sep 21 11:18:24.094 INFO running `"docker" "rm" "-f" "dce51ee83b99dae3171f070aa0233c99740301a867197426218686a0276be952"`
Sep 21 11:18:24.157 INFO blam! dce51ee83b99dae3171f070aa0233c99740301a867197426218686a0276be952