[INFO] updating cached repository https://github.com/chucksmash/hejmo
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune", kill_on_drop: false }`
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 86a850454cbbcaa9d943bfe334b3a124875c4802
[INFO] testing chucksmash/hejmo against try#03a1ea71b075ab964b5278bc6e74cd6c52c36ee0 for pr-74409
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchucksmash%2Fhejmo" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/chucksmash/hejmo on toolchain 03a1ea71b075ab964b5278bc6e74cd6c52c36ee0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/chucksmash/hejmo
[INFO] finished tweaking git repo https://github.com/chucksmash/hejmo
[INFO] tweaked toml for git repo https://github.com/chucksmash/hejmo written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/chucksmash/hejmo already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 50dabeca2cc6a76e8c8fc54aa22f216a7ed3a09f549fadda69595daddd8bdba9
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "50dabeca2cc6a76e8c8fc54aa22f216a7ed3a09f549fadda69595daddd8bdba9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "50dabeca2cc6a76e8c8fc54aa22f216a7ed3a09f549fadda69595daddd8bdba9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "50dabeca2cc6a76e8c8fc54aa22f216a7ed3a09f549fadda69595daddd8bdba9", kill_on_drop: false }`
[INFO] [stdout] 50dabeca2cc6a76e8c8fc54aa22f216a7ed3a09f549fadda69595daddd8bdba9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c12fc21810d4e33baa27e67b9539076887fdd7641884aef593a884edba752b7f
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "c12fc21810d4e33baa27e67b9539076887fdd7641884aef593a884edba752b7f", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.42
[INFO] [stderr]    Compiling lazy_static v1.0.1
[INFO] [stderr]    Compiling regex v1.0.0
[INFO] [stderr]    Compiling ucd-util v0.1.1
[INFO] [stderr]    Compiling bytecount v0.3.1
[INFO] [stderr]    Compiling unicode-segmentation v1.2.1
[INFO] [stderr]    Compiling thread_local v0.3.5
[INFO] [stderr]    Compiling regex-syntax v0.6.0
[INFO] [stderr]    Compiling memchr v2.0.1
[INFO] [stderr]    Compiling termion v1.5.1
[INFO] [stderr]    Compiling aho-corasick v0.6.4
[INFO] [stderr]    Compiling hejmo v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/rope/tree.rs:535:52
[INFO] [stdout]     |
[INFO] [stdout] 535 |     pub fn prev<M: Metric<N>>(&mut self) -> Option<(usize)> {
[INFO] [stdout]     |                                                    ^^^^^^^ help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/rope/tree.rs:585:52
[INFO] [stdout]     |
[INFO] [stdout] 585 |     pub fn next<M: Metric<N>>(&mut self) -> Option<(usize)> {
[INFO] [stdout]     |                                                    ^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `text`
[INFO] [stdout]   --> src/document.rs:76:33
[INFO] [stdout]    |
[INFO] [stdout] 76 |                 Delta::Delete { text, pos } => {
[INFO] [stdout]    |                                 ^^^^ help: try ignoring the field: `text: _`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `text`
[INFO] [stdout]   --> src/document.rs:93:33
[INFO] [stdout]    |
[INFO] [stdout] 93 |                 Delta::Delete { text, pos } => {
[INFO] [stdout]    |                                 ^^^^ help: try ignoring the field: `text: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 14.46s
[INFO] running `Command { std: "docker" "inspect" "c12fc21810d4e33baa27e67b9539076887fdd7641884aef593a884edba752b7f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c12fc21810d4e33baa27e67b9539076887fdd7641884aef593a884edba752b7f", kill_on_drop: false }`
[INFO] [stdout] c12fc21810d4e33baa27e67b9539076887fdd7641884aef593a884edba752b7f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9f59e35103c82ba0101426f72e21736d88e4f99dc7cafbc41aaf03848321721e
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "9f59e35103c82ba0101426f72e21736d88e4f99dc7cafbc41aaf03848321721e", kill_on_drop: false }`
[INFO] [stderr]    Compiling hejmo v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/rope/tree.rs:535:52
[INFO] [stdout]     |
[INFO] [stdout] 535 |     pub fn prev<M: Metric<N>>(&mut self) -> Option<(usize)> {
[INFO] [stdout]     |                                                    ^^^^^^^ help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/rope/tree.rs:585:52
[INFO] [stdout]     |
[INFO] [stdout] 585 |     pub fn next<M: Metric<N>>(&mut self) -> Option<(usize)> {
[INFO] [stdout]     |                                                    ^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `text`
[INFO] [stdout]   --> src/document.rs:76:33
[INFO] [stdout]    |
[INFO] [stdout] 76 |                 Delta::Delete { text, pos } => {
[INFO] [stdout]    |                                 ^^^^ help: try ignoring the field: `text: _`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `text`
[INFO] [stdout]   --> src/document.rs:93:33
[INFO] [stdout]    |
[INFO] [stdout] 93 |                 Delta::Delete { text, pos } => {
[INFO] [stdout]    |                                 ^^^^ help: try ignoring the field: `text: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/rope/tree.rs:535:52
[INFO] [stdout]     |
[INFO] [stdout] 535 |     pub fn prev<M: Metric<N>>(&mut self) -> Option<(usize)> {
[INFO] [stdout]     |                                                    ^^^^^^^ help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/rope/tree.rs:585:52
[INFO] [stdout]     |
[INFO] [stdout] 585 |     pub fn next<M: Metric<N>>(&mut self) -> Option<(usize)> {
[INFO] [stdout]     |                                                    ^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `text`
[INFO] [stdout]   --> src/document.rs:76:33
[INFO] [stdout]    |
[INFO] [stdout] 76 |                 Delta::Delete { text, pos } => {
[INFO] [stdout]    |                                 ^^^^ help: try ignoring the field: `text: _`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `text`
[INFO] [stdout]   --> src/document.rs:93:33
[INFO] [stdout]    |
[INFO] [stdout] 93 |                 Delta::Delete { text, pos } => {
[INFO] [stdout]    |                                 ^^^^ help: try ignoring the field: `text: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.29s
[INFO] running `Command { std: "docker" "inspect" "9f59e35103c82ba0101426f72e21736d88e4f99dc7cafbc41aaf03848321721e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9f59e35103c82ba0101426f72e21736d88e4f99dc7cafbc41aaf03848321721e", kill_on_drop: false }`
[INFO] [stdout] 9f59e35103c82ba0101426f72e21736d88e4f99dc7cafbc41aaf03848321721e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] f8dec1174129e58d1c32eefdd462f8e4339a244874193c304d0cf78b69c61735
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "f8dec1174129e58d1c32eefdd462f8e4339a244874193c304d0cf78b69c61735", kill_on_drop: false }`
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/rope/tree.rs:535:52
[INFO] [stderr]     |
[INFO] [stderr] 535 |     pub fn prev<M: Metric<N>>(&mut self) -> Option<(usize)> {
[INFO] [stderr]     |                                                    ^^^^^^^ help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/rope/tree.rs:585:52
[INFO] [stderr]     |
[INFO] [stderr] 585 |     pub fn next<M: Metric<N>>(&mut self) -> Option<(usize)> {
[INFO] [stderr]     |                                                    ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `text`
[INFO] [stderr]   --> src/document.rs:76:33
[INFO] [stderr]    |
[INFO] [stderr] 76 |                 Delta::Delete { text, pos } => {
[INFO] [stderr]    |                                 ^^^^ help: try ignoring the field: `text: _`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `text`
[INFO] [stderr]   --> src/document.rs:93:33
[INFO] [stderr]    |
[INFO] [stderr] 93 |                 Delta::Delete { text, pos } => {
[INFO] [stderr]    |                                 ^^^^ help: try ignoring the field: `text: _`
[INFO] [stderr] 
[INFO] [stderr] warning: 4 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/rope/tree.rs:535:52
[INFO] [stderr]     |
[INFO] [stderr] 535 |     pub fn prev<M: Metric<N>>(&mut self) -> Option<(usize)> {
[INFO] [stderr]     |                                                    ^^^^^^^ help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/rope/tree.rs:585:52
[INFO] [stderr]     |
[INFO] [stderr] 585 |     pub fn next<M: Metric<N>>(&mut self) -> Option<(usize)> {
[INFO] [stderr]     |                                                    ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `text`
[INFO] [stderr]   --> src/document.rs:76:33
[INFO] [stderr]    |
[INFO] [stderr] 76 |                 Delta::Delete { text, pos } => {
[INFO] [stderr]    |                                 ^^^^ help: try ignoring the field: `text: _`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `text`
[INFO] [stderr]   --> src/document.rs:93:33
[INFO] [stderr]    |
[INFO] [stderr] 93 |                 Delta::Delete { text, pos } => {
[INFO] [stderr]    |                                 ^^^^ help: try ignoring the field: `text: _`
[INFO] [stderr] 
[INFO] [stderr] warning: 4 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.24s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/hejmo-6eb9231836db70bc
[INFO] [stdout] 
[INFO] [stdout] running 35 tests
[INFO] [stdout] test rope::interval::tests::after ... ok
[INFO] [stdout] test rope::interval::tests::contains ... ok
[INFO] [stdout] test delta::test::doc_deltas ... ok
[INFO] [stdout] test delta::test::initialization_works ... ok
[INFO] [stdout] test rope::interval::tests::empty ... ok
[INFO] [stdout] test delta::test::easy_inverse_works ... ok
[INFO] [stdout] test rope::interval::tests::before ... ok
[INFO] [stdout] test rope::interval::tests::intersect ... ok
[INFO] [stdout] test rope::interval::tests::size ... ok
[INFO] [stdout] test rope::interval::tests::new_variants ... ok
[INFO] [stdout] test rope::interval::tests::new_params ... ok
[INFO] [stdout] test rope::interval::tests::prefix ... ok
[INFO] [stdout] test rope::interval::tests::suffix ... ok
[INFO] [stdout] test rope::interval::tests::translate ... ok
[INFO] [stdout] test rope::rope::tests::line_of_offset_small ... ok
[INFO] [stdout] test rope::rope::tests::lines_raw_small ... ok
[INFO] [stdout] test rope::rope::tests::line_offsets ... ok
[INFO] [stdout] test rope::rope::tests::eq_small ... ok
[INFO] [stdout] test rope::rope::tests::next_codepoint_offset_small ... ok
[INFO] [stdout] test rope::rope::tests::next_grapheme_offset ... ok
[INFO] [stdout] test rope::rope::tests::offset_of_line_small ... ok
[INFO] [stdout] test rope::rope::tests::prev_codepoint_offset_small ... ok
[INFO] [stdout] test rope::rope::tests::eq_med ... ok
[INFO] [stdout] test rope::rope::tests::lines_small ... ok
[INFO] [stdout] test rope::rope::tests::lines_med ... ok
[INFO] [stdout] test rope::rope::tests::prev_grapheme_offset ... ok
[INFO] [stdout] test rope::tree::test::cursor_next_empty ... ok
[INFO] [stdout] test rope::rope::tests::replace_small ... ok
[INFO] [stdout] test rope::tree::test::cursor_next_misc ... ok
[INFO] [stdout] test rope::tree::test::cursor_prev_misc ... ok
[INFO] [stdout] test rope::tree::test::cursor_next_triangle ... ok
[INFO] [stdout] test rope::rope::tests::append_large ... ok
[INFO] [stdout] test rope::rope::tests::line_of_offset_panic ... ok
[INFO] [stdout] test rope::rope::tests::offset_of_line_panic ... ok
[INFO] [stdout] test rope::rope::tests::next_grapheme_offset_with_ris_of_leaf_boundaries ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 35 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/demo-228c7e45f6838061
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests hejmo
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> /opt/rustwide/workdir/src/rope/tree.rs:535:52
[INFO] [stderr]     |
[INFO] [stderr] 535 |     pub fn prev<M: Metric<N>>(&mut self) -> Option<(usize)> {
[INFO] [stderr]     |                                                    ^^^^^^^ help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> /opt/rustwide/workdir/src/rope/tree.rs:585:52
[INFO] [stderr]     |
[INFO] [stderr] 585 |     pub fn next<M: Metric<N>>(&mut self) -> Option<(usize)> {
[INFO] [stderr]     |                                                    ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stdout] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stdout] running 0 tests
[INFO] [stderr] 
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "f8dec1174129e58d1c32eefdd462f8e4339a244874193c304d0cf78b69c61735", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f8dec1174129e58d1c32eefdd462f8e4339a244874193c304d0cf78b69c61735", kill_on_drop: false }`
[INFO] [stdout] f8dec1174129e58d1c32eefdd462f8e4339a244874193c304d0cf78b69c61735