Dec 12 18:08:53.610 INFO checking an-rope-0.3.1 against master#3a75e80557a103497cffbcab395a2f37061a77ea for pr-56677
Dec 12 18:08:53.610 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56677/worker-2/master#3a75e80557a103497cffbcab395a2f37061a77ea:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-2/pr-56677/master#3a75e80557a103497cffbcab395a2f37061a77ea:/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 +3a75e80557a103497cffbcab395a2f37061a77ea-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 12 18:08:53.858 INFO [stdout] 7eac667fe0fd9af1a8fc34c8c88d95d3156913eb8790923eb700844598a4d532
Dec 12 18:08:53.860 INFO running `"docker" "start" "-a" "7eac667fe0fd9af1a8fc34c8c88d95d3156913eb8790923eb700844598a4d532"`
Dec 12 18:08:54.994 INFO [stderr] usermod: no changes
Dec 12 18:08:55.128 INFO [stderr]     Checking an-rope v0.3.1 (/source)
Dec 12 18:08:55.160 INFO [stderr]     Checking quickcheck v0.3.2
Dec 12 18:08:56.140 INFO [stderr] warning: variable does not need to be mutable
Dec 12 18:08:56.140 INFO [stderr]    --> src/lib.rs:762:46
Dec 12 18:08:56.140 INFO [stderr]     |
Dec 12 18:08:56.140 INFO [stderr] 762 |                               .scan(0, move |mut l, i|  {
Dec 12 18:08:56.140 INFO [stderr]     |                                              ----^
Dec 12 18:08:56.140 INFO [stderr]     |                                              |
Dec 12 18:08:56.140 INFO [stderr]     |                                              help: remove this `mut`
Dec 12 18:08:56.140 INFO [stderr]     |
Dec 12 18:08:56.140 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 12 18:08:56.140 INFO [stderr] 
Dec 12 18:08:56.256 INFO [stderr] warning: method is never used: `nodes`
Dec 12 18:08:56.256 INFO [stderr]    --> src/internals/mod.rs:446:5
Dec 12 18:08:56.256 INFO [stderr]     |
Dec 12 18:08:56.256 INFO [stderr] 446 |     fn nodes(&self) -> Nodes {
Dec 12 18:08:56.256 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 18:08:56.256 INFO [stderr]     |
Dec 12 18:08:56.256 INFO [stderr]     = note: #[warn(dead_code)] on by default
Dec 12 18:08:56.256 INFO [stderr] 
Dec 12 18:08:56.256 INFO [stderr] warning: struct is never constructed: `Nodes`
Dec 12 18:08:56.256 INFO [stderr]    --> src/internals/mod.rs:645:1
Dec 12 18:08:56.256 INFO [stderr]     |
Dec 12 18:08:56.256 INFO [stderr] 645 | struct Nodes<'a>(Vec<&'a Node>);
Dec 12 18:08:56.256 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 18:08:56.256 INFO [stderr] 
Dec 12 18:08:59.663 INFO [stderr] warning: unused import: `metric::Line`
Dec 12 18:08:59.663 INFO [stderr]  --> src/test/mod.rs:4:5
Dec 12 18:08:59.663 INFO [stderr]   |
Dec 12 18:08:59.663 INFO [stderr] 4 | use metric::Line;
Dec 12 18:08:59.663 INFO [stderr]   |     ^^^^^^^^^^^^
Dec 12 18:08:59.664 INFO [stderr]   |
Dec 12 18:08:59.664 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 12 18:08:59.664 INFO [stderr] 
Dec 12 18:08:59.664 INFO [stderr] warning: unused import: `metric::Measured`
Dec 12 18:08:59.664 INFO [stderr]  --> src/test/mod.rs:5:5
Dec 12 18:08:59.664 INFO [stderr]   |
Dec 12 18:08:59.664 INFO [stderr] 5 | use metric::Measured;
Dec 12 18:08:59.664 INFO [stderr]   |     ^^^^^^^^^^^^^^^^
Dec 12 18:08:59.664 INFO [stderr] 
Dec 12 18:08:59.664 INFO [stderr] warning: unnecessary parentheses around method argument
Dec 12 18:08:59.664 INFO [stderr]   --> src/test/mod.rs:61:18
Dec 12 18:08:59.664 INFO [stderr]    |
Dec 12 18:08:59.664 INFO [stderr] 61 |     r = r.delete((8..12));
Dec 12 18:08:59.664 INFO [stderr]    |                  ^^^^^^^ help: remove these parentheses
Dec 12 18:08:59.664 INFO [stderr]    |
Dec 12 18:08:59.664 INFO [stderr]    = note: #[warn(unused_parens)] on by default
Dec 12 18:08:59.664 INFO [stderr] 
Dec 12 18:08:59.664 INFO [stderr] warning: unnecessary parentheses around method argument
Dec 12 18:08:59.664 INFO [stderr]   --> src/test/mod.rs:68:18
Dec 12 18:08:59.664 INFO [stderr]    |
Dec 12 18:08:59.664 INFO [stderr] 68 |     r = r.delete((0..0));
Dec 12 18:08:59.664 INFO [stderr]    |                  ^^^^^^ help: remove these parentheses
Dec 12 18:08:59.664 INFO [stderr] 
Dec 12 18:08:59.664 INFO [stderr] warning: unnecessary parentheses around method argument
Dec 12 18:08:59.664 INFO [stderr]    --> src/test/mod.rs:117:14
Dec 12 18:08:59.664 INFO [stderr]     |
Dec 12 18:08:59.664 INFO [stderr] 117 |     r.delete((12..8)); // lol, fuck you
Dec 12 18:08:59.664 INFO [stderr]     |              ^^^^^^^ help: remove these parentheses
Dec 12 18:08:59.664 INFO [stderr] 
Dec 12 18:08:59.671 INFO [stderr] warning: unused import: `super::*`
Dec 12 18:08:59.671 INFO [stderr]    --> src/slice.rs:710:9
Dec 12 18:08:59.672 INFO [stderr]     |
Dec 12 18:08:59.672 INFO [stderr] 710 |     use super::*;
Dec 12 18:08:59.672 INFO [stderr]     |         ^^^^^^^^
Dec 12 18:08:59.672 INFO [stderr] 
Dec 12 18:09:00.448 INFO [stderr] warning: unused variable: `left`
Dec 12 18:09:00.448 INFO [stderr]   --> src/internals/test.rs:49:10
Dec 12 18:09:00.448 INFO [stderr]    |
Dec 12 18:09:00.448 INFO [stderr] 49 |     let (left, right) = b.split(Line(1));
Dec 12 18:09:00.448 INFO [stderr]    |          ^^^^ help: consider using `_left` instead
Dec 12 18:09:00.448 INFO [stderr]    |
Dec 12 18:09:00.448 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 12 18:09:00.448 INFO [stderr] 
Dec 12 18:09:00.448 INFO [stderr] warning: unused variable: `right`
Dec 12 18:09:00.448 INFO [stderr]   --> src/internals/test.rs:49:16
Dec 12 18:09:00.448 INFO [stderr]    |
Dec 12 18:09:00.448 INFO [stderr] 49 |     let (left, right) = b.split(Line(1));
Dec 12 18:09:00.448 INFO [stderr]    |                ^^^^^ help: consider using `_right` instead
Dec 12 18:09:00.448 INFO [stderr] 
Dec 12 18:09:00.480 INFO [stderr] warning: variable does not need to be mutable
Dec 12 18:09:00.480 INFO [stderr]    --> src/lib.rs:762:46
Dec 12 18:09:00.480 INFO [stderr]     |
Dec 12 18:09:00.480 INFO [stderr] 762 |                               .scan(0, move |mut l, i|  {
Dec 12 18:09:00.480 INFO [stderr]     |                                              ----^
Dec 12 18:09:00.480 INFO [stderr]     |                                              |
Dec 12 18:09:00.480 INFO [stderr]     |                                              help: remove this `mut`
Dec 12 18:09:00.480 INFO [stderr]     |
Dec 12 18:09:00.480 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 12 18:09:00.480 INFO [stderr] 
Dec 12 18:09:00.500 INFO [stderr] warning: variable does not need to be mutable
Dec 12 18:09:00.500 INFO [stderr]   --> src/test/mod.rs:28:9
Dec 12 18:09:00.500 INFO [stderr]    |
Dec 12 18:09:00.500 INFO [stderr] 28 |     let mut rope = Rope::from("this is\n\
Dec 12 18:09:00.500 INFO [stderr]    |         ----^^^^
Dec 12 18:09:00.500 INFO [stderr]    |         |
Dec 12 18:09:00.500 INFO [stderr]    |         help: remove this `mut`
Dec 12 18:09:00.500 INFO [stderr] 
Dec 12 18:09:00.504 INFO [stderr] warning: variable does not need to be mutable
Dec 12 18:09:00.504 INFO [stderr]   --> src/test/mod.rs:44:9
Dec 12 18:09:00.504 INFO [stderr]    |
Dec 12 18:09:00.504 INFO [stderr] 44 |     let mut rope = Rope::from("this is\n\
Dec 12 18:09:00.504 INFO [stderr]    |         ----^^^^
Dec 12 18:09:00.504 INFO [stderr]    |         |
Dec 12 18:09:00.504 INFO [stderr]    |         help: remove this `mut`
Dec 12 18:09:00.504 INFO [stderr] 
Dec 12 18:09:00.508 INFO [stderr] warning: variable does not need to be mutable
Dec 12 18:09:00.508 INFO [stderr]    --> src/test/mod.rs:116:9
Dec 12 18:09:00.508 INFO [stderr]     |
Dec 12 18:09:00.508 INFO [stderr] 116 |     let mut r = Rope::from("this is not fine");
Dec 12 18:09:00.508 INFO [stderr]     |         ----^
Dec 12 18:09:00.508 INFO [stderr]     |         |
Dec 12 18:09:00.508 INFO [stderr]     |         help: remove this `mut`
Dec 12 18:09:00.508 INFO [stderr] 
Dec 12 18:09:00.560 INFO [stderr] warning: variable does not need to be mutable
Dec 12 18:09:00.560 INFO [stderr]    --> src/test/mod.rs:476:17
Dec 12 18:09:00.560 INFO [stderr]     |
Dec 12 18:09:00.560 INFO [stderr] 476 |             let mut rope = Rope::from(a.clone());
Dec 12 18:09:00.560 INFO [stderr]     |                 ----^^^^
Dec 12 18:09:00.560 INFO [stderr]     |                 |
Dec 12 18:09:00.560 INFO [stderr]     |                 help: remove this `mut`
Dec 12 18:09:00.560 INFO [stderr] 
Dec 12 18:09:00.816 INFO [stderr] warning: function is never used: `line_delete_test_1`
Dec 12 18:09:00.816 INFO [stderr]   --> src/test/mod.rs:26:1
Dec 12 18:09:00.816 INFO [stderr]    |
Dec 12 18:09:00.816 INFO [stderr] 26 | fn line_delete_test_1() {
Dec 12 18:09:00.816 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 18:09:00.816 INFO [stderr]    |
Dec 12 18:09:00.816 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 12 18:09:00.816 INFO [stderr] 
Dec 12 18:09:00.816 INFO [stderr] warning: function is never used: `line_delete_test_2`
Dec 12 18:09:00.816 INFO [stderr]   --> src/test/mod.rs:42:1
Dec 12 18:09:00.816 INFO [stderr]    |
Dec 12 18:09:00.816 INFO [stderr] 42 | fn line_delete_test_2() {
Dec 12 18:09:00.816 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 18:09:00.816 INFO [stderr] 
Dec 12 18:09:00.817 INFO [stderr] warning: function is never used: `debug_test_1`
Dec 12 18:09:00.817 INFO [stderr]    --> src/test/mod.rs:125:5
Dec 12 18:09:00.817 INFO [stderr]     |
Dec 12 18:09:00.817 INFO [stderr] 125 |     fn debug_test_1() {
Dec 12 18:09:00.817 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^
Dec 12 18:09:00.817 INFO [stderr] 
Dec 12 18:09:00.817 INFO [stderr] warning: function is never used: `debug_test_2`
Dec 12 18:09:00.817 INFO [stderr]    --> src/test/mod.rs:131:5
Dec 12 18:09:00.817 INFO [stderr]     |
Dec 12 18:09:00.817 INFO [stderr] 131 |     fn debug_test_2() {
Dec 12 18:09:00.817 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^
Dec 12 18:09:00.817 INFO [stderr] 
Dec 12 18:09:00.817 INFO [stderr] warning: function is never used: `debug_test_3`
Dec 12 18:09:00.817 INFO [stderr]    --> src/test/mod.rs:137:5
Dec 12 18:09:00.817 INFO [stderr]     |
Dec 12 18:09:00.817 INFO [stderr] 137 |     fn debug_test_3() {
Dec 12 18:09:00.817 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^
Dec 12 18:09:00.817 INFO [stderr] 
Dec 12 18:09:00.817 INFO [stderr] warning: function is never used: `rope_indexing_is_string_indexing`
Dec 12 18:09:00.817 INFO [stderr]    --> src/test/mod.rs:446:5
Dec 12 18:09:00.817 INFO [stderr]     |
Dec 12 18:09:00.817 INFO [stderr] 446 |     fn rope_indexing_is_string_indexing() {
Dec 12 18:09:00.817 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 18:09:00.817 INFO [stderr] 
Dec 12 18:09:00.817 INFO [stderr] warning: function is never used: `rope_insert_char_is_string_insert_char`
Dec 12 18:09:00.817 INFO [stderr]    --> src/test/mod.rs:462:5
Dec 12 18:09:00.817 INFO [stderr]     |
Dec 12 18:09:00.817 INFO [stderr] 462 |     fn rope_insert_char_is_string_insert_char() {
Dec 12 18:09:00.817 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 18:09:00.817 INFO [stderr] 
Dec 12 18:09:00.820 INFO [stderr] warning: constant item is never used: `TEST_WORD`
Dec 12 18:09:00.820 INFO [stderr]     --> src/unicode/test/testdata.rs:520:5
Dec 12 18:09:00.820 INFO [stderr]      |
Dec 12 18:09:00.820 INFO [stderr] 520  | /     pub const TEST_WORD: &'static [(&'static str, &'static [&'static str])] = &[
Dec 12 18:09:00.820 INFO [stderr] 521  | |         ("\u{1}\u{1}", &["\u{1}", "\u{1}"]), ("\u{1}\u{308}\u{1}", &["\u{1}\u{308}", "\u{1}"]),
Dec 12 18:09:00.820 INFO [stderr] 522  | |         ("\u{1}\u{d}", &["\u{1}", "\u{d}"]), ("\u{1}\u{308}\u{d}", &["\u{1}\u{308}", "\u{d}"]),
Dec 12 18:09:00.820 INFO [stderr] 523  | |         ("\u{1}\u{a}", &["\u{1}", "\u{a}"]), ("\u{1}\u{308}\u{a}", &["\u{1}\u{308}", "\u{a}"]),
Dec 12 18:09:00.820 INFO [stderr] ...    |
Dec 12 18:09:00.820 INFO [stderr] 2056 | |         "\u{2c}", "\u{2c}", "\u{61}"])
Dec 12 18:09:00.820 INFO [stderr] 2057 | |     ];
Dec 12 18:09:00.820 INFO [stderr]      | |______^
Dec 12 18:09:00.820 INFO [stderr] 
Dec 12 18:09:00.820 INFO [stderr] warning: method is never used: `nodes`
Dec 12 18:09:00.820 INFO [stderr]    --> src/internals/mod.rs:446:5
Dec 12 18:09:00.820 INFO [stderr]     |
Dec 12 18:09:00.820 INFO [stderr] 446 |     fn nodes(&self) -> Nodes {
Dec 12 18:09:00.820 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 18:09:00.820 INFO [stderr] 
Dec 12 18:09:00.820 INFO [stderr] warning: struct is never constructed: `Nodes`
Dec 12 18:09:00.821 INFO [stderr]    --> src/internals/mod.rs:645:1
Dec 12 18:09:00.821 INFO [stderr]     |
Dec 12 18:09:00.821 INFO [stderr] 645 | struct Nodes<'a>(Vec<&'a Node>);
Dec 12 18:09:00.821 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 18:09:00.821 INFO [stderr] 
Dec 12 18:09:00.822 INFO [stderr] warning: unused attribute
Dec 12 18:09:00.822 INFO [stderr]   --> src/test/mod.rs:25:1
Dec 12 18:09:00.822 INFO [stderr]    |
Dec 12 18:09:00.822 INFO [stderr] 25 | #[ignore]
Dec 12 18:09:00.822 INFO [stderr]    | ^^^^^^^^^
Dec 12 18:09:00.822 INFO [stderr]    |
Dec 12 18:09:00.822 INFO [stderr]    = note: #[warn(unused_attributes)] on by default
Dec 12 18:09:00.822 INFO [stderr] 
Dec 12 18:09:00.822 INFO [stderr] warning: unused attribute
Dec 12 18:09:00.822 INFO [stderr]   --> src/test/mod.rs:41:1
Dec 12 18:09:00.822 INFO [stderr]    |
Dec 12 18:09:00.822 INFO [stderr] 41 | #[ignore]
Dec 12 18:09:00.822 INFO [stderr]    | ^^^^^^^^^
Dec 12 18:09:00.822 INFO [stderr] 
Dec 12 18:09:00.822 INFO [stderr] warning: unused attribute
Dec 12 18:09:00.822 INFO [stderr]    --> src/test/mod.rs:114:1
Dec 12 18:09:00.822 INFO [stderr]     |
Dec 12 18:09:00.822 INFO [stderr] 114 | #[should_panic]
Dec 12 18:09:00.822 INFO [stderr]     | ^^^^^^^^^^^^^^^
Dec 12 18:09:00.822 INFO [stderr] 
Dec 12 18:09:00.822 INFO [stderr] warning: unused attribute
Dec 12 18:09:00.822 INFO [stderr]    --> src/test/mod.rs:124:5
Dec 12 18:09:00.822 INFO [stderr]     |
Dec 12 18:09:00.822 INFO [stderr] 124 |     #[ignore]
Dec 12 18:09:00.822 INFO [stderr]     |     ^^^^^^^^^
Dec 12 18:09:00.822 INFO [stderr] 
Dec 12 18:09:00.822 INFO [stderr] warning: unused attribute
Dec 12 18:09:00.822 INFO [stderr]    --> src/test/mod.rs:130:5
Dec 12 18:09:00.822 INFO [stderr]     |
Dec 12 18:09:00.822 INFO [stderr] 130 |     #[ignore]
Dec 12 18:09:00.822 INFO [stderr]     |     ^^^^^^^^^
Dec 12 18:09:00.822 INFO [stderr] 
Dec 12 18:09:00.823 INFO [stderr] warning: unused attribute
Dec 12 18:09:00.823 INFO [stderr]    --> src/test/mod.rs:136:5
Dec 12 18:09:00.823 INFO [stderr]     |
Dec 12 18:09:00.823 INFO [stderr] 136 |     #[ignore]
Dec 12 18:09:00.823 INFO [stderr]     |     ^^^^^^^^^
Dec 12 18:09:00.823 INFO [stderr] 
Dec 12 18:09:00.828 INFO [stderr] warning: unused attribute
Dec 12 18:09:00.828 INFO [stderr]    --> src/test/mod.rs:445:5
Dec 12 18:09:00.828 INFO [stderr]     |
Dec 12 18:09:00.828 INFO [stderr] 445 |     #[ignore]
Dec 12 18:09:00.828 INFO [stderr]     |     ^^^^^^^^^
Dec 12 18:09:00.828 INFO [stderr] 
Dec 12 18:09:00.828 INFO [stderr] warning: unused attribute
Dec 12 18:09:00.828 INFO [stderr]    --> src/test/mod.rs:461:5
Dec 12 18:09:00.828 INFO [stderr]     |
Dec 12 18:09:00.828 INFO [stderr] 461 |     #[ignore]
Dec 12 18:09:00.828 INFO [stderr]     |     ^^^^^^^^^
Dec 12 18:09:00.828 INFO [stderr] 
Dec 12 18:09:00.828 INFO [stderr] warning: module `FromIterator` should have a snake case name such as `from_iterator`
Dec 12 18:09:00.828 INFO [stderr]    --> src/test/mod.rs:614:5
Dec 12 18:09:00.828 INFO [stderr]     |
Dec 12 18:09:00.828 INFO [stderr] 614 | /     mod FromIterator {
Dec 12 18:09:00.828 INFO [stderr] 615 | |         use ::Rope;
Dec 12 18:09:00.828 INFO [stderr] 616 | |         quickcheck! {
Dec 12 18:09:00.828 INFO [stderr] 617 | |             fn prop_strings_concat(v: Vec<String>) -> bool {
Dec 12 18:09:00.828 INFO [stderr] ...   |
Dec 12 18:09:00.828 INFO [stderr] 709 | |
Dec 12 18:09:00.828 INFO [stderr] 710 | |     }
Dec 12 18:09:00.828 INFO [stderr]     | |_____^
Dec 12 18:09:00.828 INFO [stderr]     |
Dec 12 18:09:00.828 INFO [stderr]     = note: #[warn(non_snake_case)] on by default
Dec 12 18:09:00.828 INFO [stderr] 
Dec 12 18:09:01.008 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.01s
Dec 12 18:09:01.019 INFO [stderr] su: No module specific data is present
Dec 12 18:09:02.448 INFO running `"docker" "inspect" "7eac667fe0fd9af1a8fc34c8c88d95d3156913eb8790923eb700844598a4d532"`
Dec 12 18:09:02.878 INFO running `"docker" "rm" "-f" "7eac667fe0fd9af1a8fc34c8c88d95d3156913eb8790923eb700844598a4d532"`
Dec 12 18:09:03.236 INFO [stdout] 7eac667fe0fd9af1a8fc34c8c88d95d3156913eb8790923eb700844598a4d532