Dec 15 16:53:48.054 INFO testing disjoint-set-0.0.2 against master#bd47d6825bf4090517549d33cfef10d3300b4a75 for pr-56550
Dec 15 16:53:48.054 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-0/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-0/pr-56550/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/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 +bd47d6825bf4090517549d33cfef10d3300b4a75-alt build --frozen" "-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 15 16:53:48.287 INFO [stdout] 17bd8211815e42bda14389acb7eda47300a87ab98fb056543b93009605d8f6f3
Dec 15 16:53:48.291 INFO running `"docker" "start" "-a" "17bd8211815e42bda14389acb7eda47300a87ab98fb056543b93009605d8f6f3"`
Dec 15 16:53:49.003 INFO [stderr] usermod: no changes
Dec 15 16:53:49.030 INFO [stderr]    Compiling disjoint-set v0.0.2 (/source)
Dec 15 16:53:49.554 INFO [stderr] warning: unused import: `std::rc::Rc`
Dec 15 16:53:49.554 INFO [stderr]  --> src/lib.rs:3:5
Dec 15 16:53:49.554 INFO [stderr]   |
Dec 15 16:53:49.554 INFO [stderr] 3 | use std::rc::Rc;
Dec 15 16:53:49.554 INFO [stderr]   |     ^^^^^^^^^^^
Dec 15 16:53:49.554 INFO [stderr]   |
Dec 15 16:53:49.554 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 15 16:53:49.554 INFO [stderr] 
Dec 15 16:53:49.587 INFO [stderr] warning: unused variable: `p`
Dec 15 16:53:49.587 INFO [stderr]   --> src/lib.rs:37:18
Dec 15 16:53:49.587 INFO [stderr]    |
Dec 15 16:53:49.587 INFO [stderr] 37 |             Some(p) => return,
Dec 15 16:53:49.587 INFO [stderr]    |                  ^ help: consider using `_p` instead
Dec 15 16:53:49.587 INFO [stderr]    |
Dec 15 16:53:49.587 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 15 16:53:49.587 INFO [stderr] 
Dec 15 16:53:49.587 INFO [stderr] warning: variable does not need to be mutable
Dec 15 16:53:49.587 INFO [stderr]   --> src/lib.rs:35:13
Dec 15 16:53:49.587 INFO [stderr]    |
Dec 15 16:53:49.587 INFO [stderr] 35 |         let mut len = &mut self.set_size;
Dec 15 16:53:49.587 INFO [stderr]    |             ----^^^
Dec 15 16:53:49.587 INFO [stderr]    |             |
Dec 15 16:53:49.587 INFO [stderr]    |             help: remove this `mut`
Dec 15 16:53:49.587 INFO [stderr]    |
Dec 15 16:53:49.587 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 15 16:53:49.587 INFO [stderr] 
Dec 15 16:53:49.587 INFO [stderr] warning: variable does not need to be mutable
Dec 15 16:53:49.587 INFO [stderr]   --> src/lib.rs:53:13
Dec 15 16:53:49.587 INFO [stderr]    |
Dec 15 16:53:49.587 INFO [stderr] 53 |         let mut pos: usize;
Dec 15 16:53:49.587 INFO [stderr]    |             ----^^^
Dec 15 16:53:49.587 INFO [stderr]    |             |
Dec 15 16:53:49.587 INFO [stderr]    |             help: remove this `mut`
Dec 15 16:53:49.587 INFO [stderr] 
Dec 15 16:53:49.587 INFO [stderr] warning: variant is never constructed: `Root`
Dec 15 16:53:49.587 INFO [stderr]  --> src/lib.rs:7:5
Dec 15 16:53:49.587 INFO [stderr]   |
Dec 15 16:53:49.587 INFO [stderr] 7 |     Root(ValueType, u32),
Dec 15 16:53:49.587 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^
Dec 15 16:53:49.587 INFO [stderr]   |
Dec 15 16:53:49.587 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 15 16:53:49.587 INFO [stderr] 
Dec 15 16:53:49.587 INFO [stderr] warning: variant is never constructed: `Link`
Dec 15 16:53:49.587 INFO [stderr]  --> src/lib.rs:8:5
Dec 15 16:53:49.587 INFO [stderr]   |
Dec 15 16:53:49.587 INFO [stderr] 8 |     Link(Box<SetItem<ValueType>>)
Dec 15 16:53:49.587 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 15 16:53:49.587 INFO [stderr] 
Dec 15 16:53:49.643 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.62s
Dec 15 16:53:49.646 INFO [stderr] su: No module specific data is present
Dec 15 16:53:50.411 INFO running `"docker" "inspect" "17bd8211815e42bda14389acb7eda47300a87ab98fb056543b93009605d8f6f3"`
Dec 15 16:53:50.634 INFO running `"docker" "rm" "-f" "17bd8211815e42bda14389acb7eda47300a87ab98fb056543b93009605d8f6f3"`
Dec 15 16:53:50.818 INFO [stdout] 17bd8211815e42bda14389acb7eda47300a87ab98fb056543b93009605d8f6f3
Dec 15 16:53:50.821 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-0/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-0/pr-56550/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/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 +bd47d6825bf4090517549d33cfef10d3300b4a75-alt test --frozen --no-run" "-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 15 16:53:51.121 INFO [stdout] 903e0a4540750f09777919955895f5b439180480191d9ad5b5288e0050aded3c
Dec 15 16:53:51.123 INFO running `"docker" "start" "-a" "903e0a4540750f09777919955895f5b439180480191d9ad5b5288e0050aded3c"`
Dec 15 16:53:52.206 INFO [stderr] usermod: no changes
Dec 15 16:53:52.278 INFO [stderr]    Compiling disjoint-set v0.0.2 (/source)
Dec 15 16:53:53.191 INFO [stderr] warning: unused import: `std::rc::Rc`
Dec 15 16:53:53.191 INFO [stderr]  --> src/lib.rs:3:5
Dec 15 16:53:53.191 INFO [stderr]   |
Dec 15 16:53:53.191 INFO [stderr] 3 | use std::rc::Rc;
Dec 15 16:53:53.191 INFO [stderr]   |     ^^^^^^^^^^^
Dec 15 16:53:53.191 INFO [stderr]   |
Dec 15 16:53:53.191 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 15 16:53:53.191 INFO [stderr] 
Dec 15 16:53:53.223 INFO [stderr] warning: unused variable: `p`
Dec 15 16:53:53.223 INFO [stderr]   --> src/lib.rs:37:18
Dec 15 16:53:53.223 INFO [stderr]    |
Dec 15 16:53:53.223 INFO [stderr] 37 |             Some(p) => return,
Dec 15 16:53:53.223 INFO [stderr]    |                  ^ help: consider using `_p` instead
Dec 15 16:53:53.223 INFO [stderr]    |
Dec 15 16:53:53.223 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 15 16:53:53.223 INFO [stderr] 
Dec 15 16:53:53.223 INFO [stderr] warning: variable does not need to be mutable
Dec 15 16:53:53.223 INFO [stderr]   --> src/lib.rs:35:13
Dec 15 16:53:53.223 INFO [stderr]    |
Dec 15 16:53:53.223 INFO [stderr] 35 |         let mut len = &mut self.set_size;
Dec 15 16:53:53.223 INFO [stderr]    |             ----^^^
Dec 15 16:53:53.223 INFO [stderr]    |             |
Dec 15 16:53:53.223 INFO [stderr]    |             help: remove this `mut`
Dec 15 16:53:53.223 INFO [stderr]    |
Dec 15 16:53:53.223 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 15 16:53:53.223 INFO [stderr] 
Dec 15 16:53:53.223 INFO [stderr] warning: variable does not need to be mutable
Dec 15 16:53:53.223 INFO [stderr]   --> src/lib.rs:53:13
Dec 15 16:53:53.223 INFO [stderr]    |
Dec 15 16:53:53.223 INFO [stderr] 53 |         let mut pos: usize;
Dec 15 16:53:53.223 INFO [stderr]    |             ----^^^
Dec 15 16:53:53.223 INFO [stderr]    |             |
Dec 15 16:53:53.223 INFO [stderr]    |             help: remove this `mut`
Dec 15 16:53:53.223 INFO [stderr] 
Dec 15 16:53:53.227 INFO [stderr] warning: variant is never constructed: `Root`
Dec 15 16:53:53.227 INFO [stderr]  --> src/lib.rs:7:5
Dec 15 16:53:53.227 INFO [stderr]   |
Dec 15 16:53:53.227 INFO [stderr] 7 |     Root(ValueType, u32),
Dec 15 16:53:53.227 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^
Dec 15 16:53:53.227 INFO [stderr]   |
Dec 15 16:53:53.227 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 15 16:53:53.227 INFO [stderr] 
Dec 15 16:53:53.227 INFO [stderr] warning: variant is never constructed: `Link`
Dec 15 16:53:53.227 INFO [stderr]  --> src/lib.rs:8:5
Dec 15 16:53:53.227 INFO [stderr]   |
Dec 15 16:53:53.227 INFO [stderr] 8 |     Link(Box<SetItem<ValueType>>)
Dec 15 16:53:53.227 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 15 16:53:53.227 INFO [stderr] 
Dec 15 16:53:53.239 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 15 16:53:53.239 INFO [stderr]    --> src/lib.rs:106:5
Dec 15 16:53:53.239 INFO [stderr]     |
Dec 15 16:53:53.239 INFO [stderr] 106 |     ds.union(1, 2);
Dec 15 16:53:53.239 INFO [stderr]     |     ^^^^^^^^^^^^^^^
Dec 15 16:53:53.239 INFO [stderr]     |
Dec 15 16:53:53.239 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 15 16:53:53.239 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 15 16:53:53.239 INFO [stderr] 
Dec 15 16:53:53.239 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 15 16:53:53.239 INFO [stderr]    --> src/lib.rs:107:5
Dec 15 16:53:53.239 INFO [stderr]     |
Dec 15 16:53:53.239 INFO [stderr] 107 |     ds.union(2, 3);
Dec 15 16:53:53.239 INFO [stderr]     |     ^^^^^^^^^^^^^^^
Dec 15 16:53:53.239 INFO [stderr]     |
Dec 15 16:53:53.239 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 15 16:53:53.239 INFO [stderr] 
Dec 15 16:53:53.239 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 15 16:53:53.239 INFO [stderr]    --> src/lib.rs:118:5
Dec 15 16:53:53.239 INFO [stderr]     |
Dec 15 16:53:53.239 INFO [stderr] 118 |     ds.union(-1, 4);
Dec 15 16:53:53.239 INFO [stderr]     |     ^^^^^^^^^^^^^^^^
Dec 15 16:53:53.239 INFO [stderr]     |
Dec 15 16:53:53.239 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 15 16:53:53.239 INFO [stderr] 
Dec 15 16:53:53.239 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 15 16:53:53.239 INFO [stderr]    --> src/lib.rs:119:5
Dec 15 16:53:53.239 INFO [stderr]     |
Dec 15 16:53:53.239 INFO [stderr] 119 |     ds.union(2, 4);
Dec 15 16:53:53.239 INFO [stderr]     |     ^^^^^^^^^^^^^^^
Dec 15 16:53:53.239 INFO [stderr]     |
Dec 15 16:53:53.239 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 15 16:53:53.239 INFO [stderr] 
Dec 15 16:53:53.916 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.67s
Dec 15 16:53:53.919 INFO [stderr] su: No module specific data is present
Dec 15 16:53:54.968 INFO running `"docker" "inspect" "903e0a4540750f09777919955895f5b439180480191d9ad5b5288e0050aded3c"`
Dec 15 16:53:55.257 INFO running `"docker" "rm" "-f" "903e0a4540750f09777919955895f5b439180480191d9ad5b5288e0050aded3c"`
Dec 15 16:53:55.570 INFO [stdout] 903e0a4540750f09777919955895f5b439180480191d9ad5b5288e0050aded3c
Dec 15 16:53:55.576 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-0/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-0/pr-56550/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/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 +bd47d6825bf4090517549d33cfef10d3300b4a75-alt test --frozen" "-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 15 16:53:56.065 INFO [stdout] b5a2125e228110a4689a672b75db052a8a221813288da1d224ac820299a5a12e
Dec 15 16:53:56.068 INFO running `"docker" "start" "-a" "b5a2125e228110a4689a672b75db052a8a221813288da1d224ac820299a5a12e"`
Dec 15 16:53:56.875 INFO [stderr] usermod: no changes
Dec 15 16:53:56.906 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
Dec 15 16:53:56.907 INFO [stderr]      Running /target/debug/deps/disjoint_set-6802c3586ace5506
Dec 15 16:53:56.935 INFO [stdout] 
Dec 15 16:53:56.935 INFO [stdout] running 1 test
Dec 15 16:53:56.941 INFO [stdout] test it_works ... ok
Dec 15 16:53:56.941 INFO [stderr]    Doc-tests disjoint-set
Dec 15 16:53:56.941 INFO [stdout] 
Dec 15 16:53:56.941 INFO [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 15 16:53:56.941 INFO [stdout] 
Dec 15 16:53:57.898 INFO [stdout] 
Dec 15 16:53:57.899 INFO [stdout] running 0 tests
Dec 15 16:53:57.899 INFO [stdout] 
Dec 15 16:53:57.899 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 15 16:53:57.899 INFO [stdout] 
Dec 15 16:53:57.906 INFO [stderr] su: No module specific data is present
Dec 15 16:53:58.212 INFO running `"docker" "inspect" "b5a2125e228110a4689a672b75db052a8a221813288da1d224ac820299a5a12e"`
Dec 15 16:53:58.290 INFO running `"docker" "rm" "-f" "b5a2125e228110a4689a672b75db052a8a221813288da1d224ac820299a5a12e"`
Dec 15 16:53:58.392 INFO [stdout] b5a2125e228110a4689a672b75db052a8a221813288da1d224ac820299a5a12e