Dec 05 14:32:30.544 INFO checking disjoint-set-0.0.2 against master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc for pr-56481
Dec 05 14:32:30.544 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56481/worker-2/master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-2/pr-56481/master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc:/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 +c8ae2de8363be088604ffa2ccba84ff7ad7250bc-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 05 14:32:30.969 INFO [stdout] 2e3534d5e4ac54b1f3160236fba61e8696b92efd83114f98ee1e1171fae361cd
Dec 05 14:32:30.972 INFO running `"docker" "start" "-a" "2e3534d5e4ac54b1f3160236fba61e8696b92efd83114f98ee1e1171fae361cd"`
Dec 05 14:32:31.981 INFO [stderr] usermod: no changes
Dec 05 14:32:32.009 INFO [stderr]     Checking disjoint-set v0.0.2 (/source)
Dec 05 14:32:32.527 INFO [stderr] warning: unused import: `std::rc::Rc`
Dec 05 14:32:32.527 INFO [stderr]  --> src/lib.rs:3:5
Dec 05 14:32:32.527 INFO [stderr]   |
Dec 05 14:32:32.527 INFO [stderr] 3 | use std::rc::Rc;
Dec 05 14:32:32.527 INFO [stderr]   |     ^^^^^^^^^^^
Dec 05 14:32:32.527 INFO [stderr]   |
Dec 05 14:32:32.527 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 05 14:32:32.527 INFO [stderr] 
Dec 05 14:32:32.563 INFO [stderr] warning: unused variable: `p`
Dec 05 14:32:32.563 INFO [stderr]   --> src/lib.rs:37:18
Dec 05 14:32:32.563 INFO [stderr]    |
Dec 05 14:32:32.563 INFO [stderr] 37 |             Some(p) => return,
Dec 05 14:32:32.563 INFO [stderr]    |                  ^ help: consider using `_p` instead
Dec 05 14:32:32.563 INFO [stderr]    |
Dec 05 14:32:32.563 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 05 14:32:32.563 INFO [stderr] 
Dec 05 14:32:32.563 INFO [stderr] warning: variable does not need to be mutable
Dec 05 14:32:32.563 INFO [stderr]   --> src/lib.rs:35:13
Dec 05 14:32:32.563 INFO [stderr]    |
Dec 05 14:32:32.563 INFO [stderr] 35 |         let mut len = &mut self.set_size;
Dec 05 14:32:32.563 INFO [stderr]    |             ----^^^
Dec 05 14:32:32.563 INFO [stderr]    |             |
Dec 05 14:32:32.563 INFO [stderr]    |             help: remove this `mut`
Dec 05 14:32:32.563 INFO [stderr]    |
Dec 05 14:32:32.563 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 05 14:32:32.563 INFO [stderr] 
Dec 05 14:32:32.563 INFO [stderr] warning: variable does not need to be mutable
Dec 05 14:32:32.563 INFO [stderr]   --> src/lib.rs:53:13
Dec 05 14:32:32.563 INFO [stderr]    |
Dec 05 14:32:32.563 INFO [stderr] 53 |         let mut pos: usize;
Dec 05 14:32:32.563 INFO [stderr]    |             ----^^^
Dec 05 14:32:32.563 INFO [stderr]    |             |
Dec 05 14:32:32.563 INFO [stderr]    |             help: remove this `mut`
Dec 05 14:32:32.563 INFO [stderr] 
Dec 05 14:32:32.563 INFO [stderr] warning: variant is never constructed: `Root`
Dec 05 14:32:32.563 INFO [stderr]  --> src/lib.rs:7:5
Dec 05 14:32:32.563 INFO [stderr]   |
Dec 05 14:32:32.563 INFO [stderr] 7 |     Root(ValueType, u32),
Dec 05 14:32:32.563 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^
Dec 05 14:32:32.563 INFO [stderr]   |
Dec 05 14:32:32.563 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 05 14:32:32.563 INFO [stderr] 
Dec 05 14:32:32.563 INFO [stderr] warning: variant is never constructed: `Link`
Dec 05 14:32:32.563 INFO [stderr]  --> src/lib.rs:8:5
Dec 05 14:32:32.563 INFO [stderr]   |
Dec 05 14:32:32.563 INFO [stderr] 8 |     Link(Box<SetItem<ValueType>>)
Dec 05 14:32:32.563 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 14:32:32.563 INFO [stderr] 
Dec 05 14:32:32.623 INFO [stderr] warning: unused import: `std::rc::Rc`
Dec 05 14:32:32.623 INFO [stderr]  --> src/lib.rs:3:5
Dec 05 14:32:32.623 INFO [stderr]   |
Dec 05 14:32:32.623 INFO [stderr] 3 | use std::rc::Rc;
Dec 05 14:32:32.623 INFO [stderr]   |     ^^^^^^^^^^^
Dec 05 14:32:32.623 INFO [stderr]   |
Dec 05 14:32:32.623 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 05 14:32:32.623 INFO [stderr] 
Dec 05 14:32:32.679 INFO [stderr] warning: unused variable: `p`
Dec 05 14:32:32.679 INFO [stderr]   --> src/lib.rs:37:18
Dec 05 14:32:32.679 INFO [stderr]    |
Dec 05 14:32:32.679 INFO [stderr] 37 |             Some(p) => return,
Dec 05 14:32:32.679 INFO [stderr]    |                  ^ help: consider using `_p` instead
Dec 05 14:32:32.679 INFO [stderr]    |
Dec 05 14:32:32.679 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 05 14:32:32.679 INFO [stderr] 
Dec 05 14:32:32.679 INFO [stderr] warning: variable does not need to be mutable
Dec 05 14:32:32.679 INFO [stderr]   --> src/lib.rs:35:13
Dec 05 14:32:32.679 INFO [stderr]    |
Dec 05 14:32:32.679 INFO [stderr] 35 |         let mut len = &mut self.set_size;
Dec 05 14:32:32.679 INFO [stderr]    |             ----^^^
Dec 05 14:32:32.679 INFO [stderr]    |             |
Dec 05 14:32:32.679 INFO [stderr]    |             help: remove this `mut`
Dec 05 14:32:32.679 INFO [stderr]    |
Dec 05 14:32:32.679 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 05 14:32:32.679 INFO [stderr] 
Dec 05 14:32:32.679 INFO [stderr] warning: variable does not need to be mutable
Dec 05 14:32:32.679 INFO [stderr]   --> src/lib.rs:53:13
Dec 05 14:32:32.679 INFO [stderr]    |
Dec 05 14:32:32.679 INFO [stderr] 53 |         let mut pos: usize;
Dec 05 14:32:32.679 INFO [stderr]    |             ----^^^
Dec 05 14:32:32.679 INFO [stderr]    |             |
Dec 05 14:32:32.679 INFO [stderr]    |             help: remove this `mut`
Dec 05 14:32:32.679 INFO [stderr] 
Dec 05 14:32:32.683 INFO [stderr] warning: variant is never constructed: `Root`
Dec 05 14:32:32.683 INFO [stderr]  --> src/lib.rs:7:5
Dec 05 14:32:32.683 INFO [stderr]   |
Dec 05 14:32:32.683 INFO [stderr] 7 |     Root(ValueType, u32),
Dec 05 14:32:32.683 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^
Dec 05 14:32:32.683 INFO [stderr]   |
Dec 05 14:32:32.683 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 05 14:32:32.683 INFO [stderr] 
Dec 05 14:32:32.683 INFO [stderr] warning: variant is never constructed: `Link`
Dec 05 14:32:32.683 INFO [stderr]  --> src/lib.rs:8:5
Dec 05 14:32:32.683 INFO [stderr]   |
Dec 05 14:32:32.683 INFO [stderr] 8 |     Link(Box<SetItem<ValueType>>)
Dec 05 14:32:32.683 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 14:32:32.683 INFO [stderr] 
Dec 05 14:32:32.698 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 14:32:32.698 INFO [stderr]    --> src/lib.rs:106:5
Dec 05 14:32:32.698 INFO [stderr]     |
Dec 05 14:32:32.698 INFO [stderr] 106 |     ds.union(1, 2);
Dec 05 14:32:32.698 INFO [stderr]     |     ^^^^^^^^^^^^^^^
Dec 05 14:32:32.698 INFO [stderr]     |
Dec 05 14:32:32.698 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 05 14:32:32.698 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 14:32:32.698 INFO [stderr] 
Dec 05 14:32:32.698 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 14:32:32.698 INFO [stderr]    --> src/lib.rs:107:5
Dec 05 14:32:32.698 INFO [stderr]     |
Dec 05 14:32:32.698 INFO [stderr] 107 |     ds.union(2, 3);
Dec 05 14:32:32.698 INFO [stderr]     |     ^^^^^^^^^^^^^^^
Dec 05 14:32:32.698 INFO [stderr]     |
Dec 05 14:32:32.698 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 14:32:32.698 INFO [stderr] 
Dec 05 14:32:32.698 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 14:32:32.698 INFO [stderr]    --> src/lib.rs:118:5
Dec 05 14:32:32.698 INFO [stderr]     |
Dec 05 14:32:32.698 INFO [stderr] 118 |     ds.union(-1, 4);
Dec 05 14:32:32.698 INFO [stderr]     |     ^^^^^^^^^^^^^^^^
Dec 05 14:32:32.698 INFO [stderr]     |
Dec 05 14:32:32.698 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 14:32:32.698 INFO [stderr] 
Dec 05 14:32:32.698 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 14:32:32.698 INFO [stderr]    --> src/lib.rs:119:5
Dec 05 14:32:32.698 INFO [stderr]     |
Dec 05 14:32:32.698 INFO [stderr] 119 |     ds.union(2, 4);
Dec 05 14:32:32.698 INFO [stderr]     |     ^^^^^^^^^^^^^^^
Dec 05 14:32:32.698 INFO [stderr]     |
Dec 05 14:32:32.698 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 14:32:32.698 INFO [stderr] 
Dec 05 14:32:32.720 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.72s
Dec 05 14:32:32.721 INFO [stderr] su: No module specific data is present
Dec 05 14:32:33.285 INFO running `"docker" "inspect" "2e3534d5e4ac54b1f3160236fba61e8696b92efd83114f98ee1e1171fae361cd"`
Dec 05 14:32:33.499 INFO running `"docker" "rm" "-f" "2e3534d5e4ac54b1f3160236fba61e8696b92efd83114f98ee1e1171fae361cd"`
Dec 05 14:32:33.755 INFO [stdout] 2e3534d5e4ac54b1f3160236fba61e8696b92efd83114f98ee1e1171fae361cd