[INFO] updating cached repository https://github.com/DownsizeEngineering/tRust_problems [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] [stderr] From https://github.com/DownsizeEngineering/tRust_problems [INFO] [stderr] 02fe87b..841f597 master -> master [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 841f597189045ad13c6e44af1af9f7bdea92cc78 [INFO] testing DownsizeEngineering/tRust_problems against 1.45.2 for beta-1.46-1 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDownsizeEngineering%2FtRust_problems" "/workspace/builds/worker-3/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/DownsizeEngineering/tRust_problems on toolchain 1.45.2 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.45.2" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/DownsizeEngineering/tRust_problems [INFO] finished tweaking git repo https://github.com/DownsizeEngineering/tRust_problems [INFO] tweaked toml for git repo https://github.com/DownsizeEngineering/tRust_problems written to /workspace/builds/worker-3/source/Cargo.toml [INFO] crate git repo https://github.com/DownsizeEngineering/tRust_problems already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.45.2" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+1.45.2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] dfcdcc1592b25f918a77608b10171811037bb13e31ce8888b1963ac9d4c531e3 [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" "dfcdcc1592b25f918a77608b10171811037bb13e31ce8888b1963ac9d4c531e3", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "dfcdcc1592b25f918a77608b10171811037bb13e31ce8888b1963ac9d4c531e3", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "dfcdcc1592b25f918a77608b10171811037bb13e31ce8888b1963ac9d4c531e3", kill_on_drop: false }` [INFO] [stdout] dfcdcc1592b25f918a77608b10171811037bb13e31ce8888b1963ac9d4c531e3 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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=warn" "-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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+1.45.2" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] e712f47c10b4dc16b30dd0b0e750328bbcf522ecfc0cd8846a772a35be5a322d [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" "e712f47c10b4dc16b30dd0b0e750328bbcf522ecfc0cd8846a772a35be5a322d", kill_on_drop: false }` [INFO] [stderr] Compiling t_rust_problems v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused variable: `dictionary` [INFO] [stdout] --> src/CharTrie.rs:108:9 [INFO] [stdout] | [INFO] [stdout] 108 | let dictionary = CharTrie::new(dictionary); [INFO] [stdout] | ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_dictionary` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `phrase` [INFO] [stdout] --> src/CharTrie.rs:106:15 [INFO] [stdout] | [INFO] [stdout] 106 | pub fn search(phrase: &str, dictionary: Vec) -> Vec> { [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_phrase` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/CharTrie.rs:107:9 [INFO] [stdout] | [INFO] [stdout] 107 | let mut output = Vec::new(); [INFO] [stdout] | ----^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/CharTrie.rs:112:9 [INFO] [stdout] | [INFO] [stdout] 112 | mut words: Vec, [INFO] [stdout] | ----^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/CharTrie.rs:119:13 [INFO] [stdout] | [INFO] [stdout] 119 | let mut step = dictionary.step(chars.next().unwrap()); [INFO] [stdout] | ----^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `is_end` [INFO] [stdout] --> src/CharTrie.rs:29:12 [INFO] [stdout] | [INFO] [stdout] 29 | pub fn is_end(&self) -> bool { return self.end; } [INFO] [stdout] | ^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `step` [INFO] [stdout] --> src/CharTrie.rs:31:12 [INFO] [stdout] | [INFO] [stdout] 31 | pub fn step(&self, c: char) -> Option<&Box> { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `contains` [INFO] [stdout] --> src/CharTrie.rs:52:8 [INFO] [stdout] | [INFO] [stdout] 52 | fn contains(&self, string: &str) -> bool { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `is_end` [INFO] [stdout] --> src/CharTrie.rs:71:12 [INFO] [stdout] | [INFO] [stdout] 71 | pub fn is_end(&self) -> bool { return self.end; } [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `step` [INFO] [stdout] --> src/CharTrie.rs:73:12 [INFO] [stdout] | [INFO] [stdout] 73 | pub fn step(&self, c: char) -> Option<&Box> { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `recurse` [INFO] [stdout] --> src/CharTrie.rs:110:8 [INFO] [stdout] | [INFO] [stdout] 110 | fn recurse( [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: module `CharTrie` should have a snake case name [INFO] [stdout] --> src/main.rs:26:5 [INFO] [stdout] | [INFO] [stdout] 26 | mod CharTrie; [INFO] [stdout] | ^^^^^^^^ help: convert the identifier to snake case: `char_trie` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(non_snake_case)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 1.32s [INFO] [stdout] warning: 12 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] running `Command { std: "docker" "inspect" "e712f47c10b4dc16b30dd0b0e750328bbcf522ecfc0cd8846a772a35be5a322d", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "e712f47c10b4dc16b30dd0b0e750328bbcf522ecfc0cd8846a772a35be5a322d", kill_on_drop: false }` [INFO] [stdout] e712f47c10b4dc16b30dd0b0e750328bbcf522ecfc0cd8846a772a35be5a322d [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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=warn" "-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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+1.45.2" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] abb65830cb1d65357b7b309bbadc3e6b602e863b8287dbd9b2e8aa07555f7203 [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" "abb65830cb1d65357b7b309bbadc3e6b602e863b8287dbd9b2e8aa07555f7203", kill_on_drop: false }` [INFO] [stderr] Compiling t_rust_problems v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused variable: `dictionary` [INFO] [stdout] --> src/CharTrie.rs:108:9 [INFO] [stdout] | [INFO] [stdout] 108 | let dictionary = CharTrie::new(dictionary); [INFO] [stdout] | ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_dictionary` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `phrase` [INFO] [stdout] --> src/CharTrie.rs:106:15 [INFO] [stdout] | [INFO] [stdout] 106 | pub fn search(phrase: &str, dictionary: Vec) -> Vec> { [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_phrase` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/CharTrie.rs:107:9 [INFO] [stdout] | [INFO] [stdout] 107 | let mut output = Vec::new(); [INFO] [stdout] | ----^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/CharTrie.rs:112:9 [INFO] [stdout] | [INFO] [stdout] 112 | mut words: Vec, [INFO] [stdout] | ----^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/CharTrie.rs:119:13 [INFO] [stdout] | [INFO] [stdout] 119 | let mut step = dictionary.step(chars.next().unwrap()); [INFO] [stdout] | ----^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `is_end` [INFO] [stdout] --> src/CharTrie.rs:29:12 [INFO] [stdout] | [INFO] [stdout] 29 | pub fn is_end(&self) -> bool { return self.end; } [INFO] [stdout] | ^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `step` [INFO] [stdout] --> src/CharTrie.rs:31:12 [INFO] [stdout] | [INFO] [stdout] 31 | pub fn step(&self, c: char) -> Option<&Box> { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `contains` [INFO] [stdout] --> src/CharTrie.rs:52:8 [INFO] [stdout] | [INFO] [stdout] 52 | fn contains(&self, string: &str) -> bool { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `is_end` [INFO] [stdout] --> src/CharTrie.rs:71:12 [INFO] [stdout] | [INFO] [stdout] 71 | pub fn is_end(&self) -> bool { return self.end; } [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `step` [INFO] [stdout] --> src/CharTrie.rs:73:12 [INFO] [stdout] | [INFO] [stdout] 73 | pub fn step(&self, c: char) -> Option<&Box> { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `recurse` [INFO] [stdout] --> src/CharTrie.rs:110:8 [INFO] [stdout] | [INFO] [stdout] 110 | fn recurse( [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: module `CharTrie` should have a snake case name [INFO] [stdout] --> src/main.rs:26:5 [INFO] [stdout] | [INFO] [stdout] 26 | mod CharTrie; [INFO] [stdout] | ^^^^^^^^ help: convert the identifier to snake case: `char_trie` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(non_snake_case)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 12 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 0.70s [INFO] running `Command { std: "docker" "inspect" "abb65830cb1d65357b7b309bbadc3e6b602e863b8287dbd9b2e8aa07555f7203", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "abb65830cb1d65357b7b309bbadc3e6b602e863b8287dbd9b2e8aa07555f7203", kill_on_drop: false }` [INFO] [stdout] abb65830cb1d65357b7b309bbadc3e6b602e863b8287dbd9b2e8aa07555f7203 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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=warn" "-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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+1.45.2" "test" "--frozen", kill_on_drop: false }` [INFO] [stdout] fe23addd409bee6789016c9dad89ea6f301293b639abec720fb40c2522372db2 [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" "fe23addd409bee6789016c9dad89ea6f301293b639abec720fb40c2522372db2", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] warning: unused variable: `dictionary` [INFO] [stderr] --> src/CharTrie.rs:108:9 [INFO] [stderr] | [INFO] [stderr] 108 | let dictionary = CharTrie::new(dictionary); [INFO] [stderr] | ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_dictionary` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `phrase` [INFO] [stderr] --> src/CharTrie.rs:106:15 [INFO] [stderr] | [INFO] [stderr] 106 | pub fn search(phrase: &str, dictionary: Vec) -> Vec> { [INFO] [stderr] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_phrase` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/CharTrie.rs:107:9 [INFO] [stderr] | [INFO] [stderr] 107 | let mut output = Vec::new(); [INFO] [stderr] | ----^^^^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_mut)]` on by default [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/CharTrie.rs:112:9 [INFO] [stderr] | [INFO] [stderr] 112 | mut words: Vec, [INFO] [stderr] | ----^^^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/CharTrie.rs:119:13 [INFO] [stderr] | [INFO] [stderr] 119 | let mut step = dictionary.step(chars.next().unwrap()); [INFO] [stderr] | ----^^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] [INFO] [stderr] warning: associated function is never used: `is_end` [INFO] [stderr] --> src/CharTrie.rs:29:12 [INFO] [stderr] | [INFO] [stderr] 29 | pub fn is_end(&self) -> bool { return self.end; } [INFO] [stderr] | ^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: associated function is never used: `step` [INFO] [stderr] --> src/CharTrie.rs:31:12 [INFO] [stderr] | [INFO] [stderr] 31 | pub fn step(&self, c: char) -> Option<&Box> { [INFO] [stderr] | ^^^^ [INFO] [stderr] [INFO] [stderr] warning: associated function is never used: `contains` [INFO] [stderr] --> src/CharTrie.rs:52:8 [INFO] [stderr] | [INFO] [stderr] 52 | fn contains(&self, string: &str) -> bool { [INFO] [stderr] | ^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: associated function is never used: `is_end` [INFO] [stderr] --> src/CharTrie.rs:71:12 [INFO] [stderr] | [INFO] [stderr] 71 | pub fn is_end(&self) -> bool { return self.end; } [INFO] [stderr] | ^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: associated function is never used: `step` [INFO] [stderr] --> src/CharTrie.rs:73:12 [INFO] [stderr] | [INFO] [stderr] 73 | pub fn step(&self, c: char) -> Option<&Box> { [INFO] [stderr] | ^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `recurse` [INFO] [stderr] --> src/CharTrie.rs:110:8 [INFO] [stderr] | [INFO] [stderr] 110 | fn recurse( [INFO] [stderr] | ^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: module `CharTrie` should have a snake case name [INFO] [stderr] --> src/main.rs:26:5 [INFO] [stderr] | [INFO] [stderr] 26 | mod CharTrie; [INFO] [stderr] | ^^^^^^^^ help: convert the identifier to snake case: `char_trie` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(non_snake_case)]` on by default [INFO] [stderr] [INFO] [stderr] warning: 12 warnings emitted [INFO] [stderr] [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 0.03s [INFO] [stderr] Running /opt/rustwide/target/debug/deps/t_rust_problems-47b86d8de07ad668 [INFO] [stdout] [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] running `Command { std: "docker" "inspect" "fe23addd409bee6789016c9dad89ea6f301293b639abec720fb40c2522372db2", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "fe23addd409bee6789016c9dad89ea6f301293b639abec720fb40c2522372db2", kill_on_drop: false }` [INFO] [stdout] fe23addd409bee6789016c9dad89ea6f301293b639abec720fb40c2522372db2