Oct 13 16:01:18.421 INFO checking disjoint-set-0.0.2 against try#4021bd0b3c5815b087d6db10ce461e7e4854ade7 for pr-54977
Oct 13 16:01:18.421 INFO running `"docker" "create" "-v" "/mnt/big/crater/./work/local/target-dirs/pr-54977/worker-2/try#4021bd0b3c5815b087d6db10ce461e7e4854ade7:/target:rw,Z" "-v" "/mnt/big/crater/./work/local/test-source/worker-2/pr-54977/try#4021bd0b3c5815b087d6db10ce461e7e4854ade7:/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 +4021bd0b3c5815b087d6db10ce461e7e4854ade7-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"`
Oct 13 16:01:18.844 INFO blam! 28295b70b386acfb82fc510838009d40a26d21faa9000a5de4d2389fa57c9630
Oct 13 16:01:18.846 INFO running `"docker" "start" "-a" "28295b70b386acfb82fc510838009d40a26d21faa9000a5de4d2389fa57c9630"`
Oct 13 16:01:19.838 INFO kablam! usermod: no changes
Oct 13 16:01:19.868 INFO kablam!     Checking disjoint-set v0.0.2 (/source)
Oct 13 16:01:20.519 INFO kablam! warning: unused import: `std::rc::Rc`
Oct 13 16:01:20.519 INFO kablam!  --> src/lib.rs:3:5
Oct 13 16:01:20.519 INFO kablam!   |
Oct 13 16:01:20.519 INFO kablam! 3 | use std::rc::Rc;
Oct 13 16:01:20.519 INFO kablam!   |     ^^^^^^^^^^^
Oct 13 16:01:20.519 INFO kablam!   |
Oct 13 16:01:20.519 INFO kablam!   = note: #[warn(unused_imports)] on by default
Oct 13 16:01:20.519 INFO kablam! 
Oct 13 16:01:20.541 INFO kablam! warning: unused variable: `p`
Oct 13 16:01:20.541 INFO kablam!   --> src/lib.rs:37:18
Oct 13 16:01:20.542 INFO kablam!    |
Oct 13 16:01:20.543 INFO kablam! 37 |             Some(p) => return,
Oct 13 16:01:20.544 INFO kablam!    |                  ^ help: consider using `_p` instead
Oct 13 16:01:20.544 INFO kablam!    |
Oct 13 16:01:20.545 INFO kablam!    = note: #[warn(unused_variables)] on by default
Oct 13 16:01:20.545 INFO kablam! 
Oct 13 16:01:20.546 INFO kablam! warning: variable does not need to be mutable
Oct 13 16:01:20.546 INFO kablam!   --> src/lib.rs:35:13
Oct 13 16:01:20.547 INFO kablam!    |
Oct 13 16:01:20.548 INFO kablam! 35 |         let mut len = &mut self.set_size;
Oct 13 16:01:20.548 INFO kablam!    |             ----^^^
Oct 13 16:01:20.549 INFO kablam!    |             |
Oct 13 16:01:20.549 INFO kablam!    |             help: remove this `mut`
Oct 13 16:01:20.549 INFO kablam!    |
Oct 13 16:01:20.549 INFO kablam!    = note: #[warn(unused_mut)] on by default
Oct 13 16:01:20.549 INFO kablam! 
Oct 13 16:01:20.549 INFO kablam! warning: variable does not need to be mutable
Oct 13 16:01:20.549 INFO kablam!   --> src/lib.rs:53:13
Oct 13 16:01:20.549 INFO kablam!    |
Oct 13 16:01:20.549 INFO kablam! 53 |         let mut pos: usize;
Oct 13 16:01:20.549 INFO kablam!    |             ----^^^
Oct 13 16:01:20.549 INFO kablam!    |             |
Oct 13 16:01:20.549 INFO kablam!    |             help: remove this `mut`
Oct 13 16:01:20.549 INFO kablam! 
Oct 13 16:01:20.549 INFO kablam! warning: variant is never constructed: `Root`
Oct 13 16:01:20.549 INFO kablam!  --> src/lib.rs:7:5
Oct 13 16:01:20.549 INFO kablam!   |
Oct 13 16:01:20.549 INFO kablam! 7 |     Root(ValueType, u32),
Oct 13 16:01:20.549 INFO kablam!   |     ^^^^^^^^^^^^^^^^^^^^
Oct 13 16:01:20.549 INFO kablam!   |
Oct 13 16:01:20.549 INFO kablam!   = note: #[warn(dead_code)] on by default
Oct 13 16:01:20.549 INFO kablam! 
Oct 13 16:01:20.549 INFO kablam! warning: variant is never constructed: `Link`
Oct 13 16:01:20.549 INFO kablam!  --> src/lib.rs:8:5
Oct 13 16:01:20.549 INFO kablam!   |
Oct 13 16:01:20.549 INFO kablam! 8 |     Link(Box<SetItem<ValueType>>)
Oct 13 16:01:20.549 INFO kablam!   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Oct 13 16:01:20.549 INFO kablam! 
Oct 13 16:01:20.699 INFO kablam! warning: unused import: `std::rc::Rc`
Oct 13 16:01:20.699 INFO kablam!  --> src/lib.rs:3:5
Oct 13 16:01:20.699 INFO kablam!   |
Oct 13 16:01:20.699 INFO kablam! 3 | use std::rc::Rc;
Oct 13 16:01:20.699 INFO kablam!   |     ^^^^^^^^^^^
Oct 13 16:01:20.699 INFO kablam!   |
Oct 13 16:01:20.699 INFO kablam!   = note: #[warn(unused_imports)] on by default
Oct 13 16:01:20.699 INFO kablam! 
Oct 13 16:01:20.742 INFO kablam! warning: unused variable: `p`
Oct 13 16:01:20.742 INFO kablam!   --> src/lib.rs:37:18
Oct 13 16:01:20.742 INFO kablam!    |
Oct 13 16:01:20.742 INFO kablam! 37 |             Some(p) => return,
Oct 13 16:01:20.743 INFO kablam!    |                  ^ help: consider using `_p` instead
Oct 13 16:01:20.743 INFO kablam!    |
Oct 13 16:01:20.743 INFO kablam!    = note: #[warn(unused_variables)] on by default
Oct 13 16:01:20.743 INFO kablam! 
Oct 13 16:01:20.745 INFO kablam! warning: variable does not need to be mutable
Oct 13 16:01:20.745 INFO kablam!   --> src/lib.rs:35:13
Oct 13 16:01:20.745 INFO kablam!    |
Oct 13 16:01:20.745 INFO kablam! 35 |         let mut len = &mut self.set_size;
Oct 13 16:01:20.745 INFO kablam!    |             ----^^^
Oct 13 16:01:20.745 INFO kablam!    |             |
Oct 13 16:01:20.745 INFO kablam!    |             help: remove this `mut`
Oct 13 16:01:20.745 INFO kablam!    |
Oct 13 16:01:20.745 INFO kablam!    = note: #[warn(unused_mut)] on by default
Oct 13 16:01:20.745 INFO kablam! 
Oct 13 16:01:20.747 INFO kablam! warning: variable does not need to be mutable
Oct 13 16:01:20.747 INFO kablam!   --> src/lib.rs:53:13
Oct 13 16:01:20.747 INFO kablam!    |
Oct 13 16:01:20.747 INFO kablam! 53 |         let mut pos: usize;
Oct 13 16:01:20.747 INFO kablam!    |             ----^^^
Oct 13 16:01:20.747 INFO kablam!    |             |
Oct 13 16:01:20.747 INFO kablam!    |             help: remove this `mut`
Oct 13 16:01:20.747 INFO kablam! 
Oct 13 16:01:20.750 INFO kablam! warning: variant is never constructed: `Root`
Oct 13 16:01:20.750 INFO kablam!  --> src/lib.rs:7:5
Oct 13 16:01:20.751 INFO kablam!   |
Oct 13 16:01:20.751 INFO kablam! 7 |     Root(ValueType, u32),
Oct 13 16:01:20.751 INFO kablam!   |     ^^^^^^^^^^^^^^^^^^^^
Oct 13 16:01:20.752 INFO kablam!   |
Oct 13 16:01:20.752 INFO kablam!   = note: #[warn(dead_code)] on by default
Oct 13 16:01:20.752 INFO kablam! 
Oct 13 16:01:20.752 INFO kablam! warning: variant is never constructed: `Link`
Oct 13 16:01:20.753 INFO kablam!  --> src/lib.rs:8:5
Oct 13 16:01:20.753 INFO kablam!   |
Oct 13 16:01:20.753 INFO kablam! 8 |     Link(Box<SetItem<ValueType>>)
Oct 13 16:01:20.753 INFO kablam!   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Oct 13 16:01:20.753 INFO kablam! 
Oct 13 16:01:20.768 INFO kablam! warning: unused `std::result::Result` which must be used
Oct 13 16:01:20.768 INFO kablam!    --> src/lib.rs:106:5
Oct 13 16:01:20.768 INFO kablam!     |
Oct 13 16:01:20.768 INFO kablam! 106 |     ds.union(1, 2);
Oct 13 16:01:20.768 INFO kablam!     |     ^^^^^^^^^^^^^^^
Oct 13 16:01:20.768 INFO kablam!     |
Oct 13 16:01:20.769 INFO kablam!     = note: #[warn(unused_must_use)] on by default
Oct 13 16:01:20.769 INFO kablam!     = note: this `Result` may be an `Err` variant, which should be handled
Oct 13 16:01:20.769 INFO kablam! 
Oct 13 16:01:20.769 INFO kablam! warning: unused `std::result::Result` which must be used
Oct 13 16:01:20.769 INFO kablam!    --> src/lib.rs:107:5
Oct 13 16:01:20.769 INFO kablam!     |
Oct 13 16:01:20.769 INFO kablam! 107 |     ds.union(2, 3);
Oct 13 16:01:20.769 INFO kablam!     |     ^^^^^^^^^^^^^^^
Oct 13 16:01:20.769 INFO kablam!     |
Oct 13 16:01:20.769 INFO kablam!     = note: this `Result` may be an `Err` variant, which should be handled
Oct 13 16:01:20.769 INFO kablam! 
Oct 13 16:01:20.769 INFO kablam! warning: unused `std::result::Result` which must be used
Oct 13 16:01:20.769 INFO kablam!    --> src/lib.rs:118:5
Oct 13 16:01:20.769 INFO kablam!     |
Oct 13 16:01:20.769 INFO kablam! 118 |     ds.union(-1, 4);
Oct 13 16:01:20.769 INFO kablam!     |     ^^^^^^^^^^^^^^^^
Oct 13 16:01:20.769 INFO kablam!     |
Oct 13 16:01:20.769 INFO kablam!     = note: this `Result` may be an `Err` variant, which should be handled
Oct 13 16:01:20.769 INFO kablam! 
Oct 13 16:01:20.769 INFO kablam! warning: unused `std::result::Result` which must be used
Oct 13 16:01:20.769 INFO kablam!    --> src/lib.rs:119:5
Oct 13 16:01:20.769 INFO kablam!     |
Oct 13 16:01:20.769 INFO kablam! 119 |     ds.union(2, 4);
Oct 13 16:01:20.769 INFO kablam!     |     ^^^^^^^^^^^^^^^
Oct 13 16:01:20.769 INFO kablam!     |
Oct 13 16:01:20.770 INFO kablam!     = note: this `Result` may be an `Err` variant, which should be handled
Oct 13 16:01:20.770 INFO kablam! 
Oct 13 16:01:20.783 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 0.93s
Oct 13 16:01:20.785 INFO kablam! su: No module specific data is present
Oct 13 16:01:21.107 INFO running `"docker" "rm" "-f" "28295b70b386acfb82fc510838009d40a26d21faa9000a5de4d2389fa57c9630"`
Oct 13 16:01:21.255 INFO blam! 28295b70b386acfb82fc510838009d40a26d21faa9000a5de4d2389fa57c9630