[INFO] fetching crate korean_numbers 0.6.6...
[INFO] testing korean_numbers-0.6.6 against 1.49.0 for beta-1.50-1
[INFO] extracting crate korean_numbers 0.6.6 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate korean_numbers 0.6.6 on toolchain 1.49.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate korean_numbers 0.6.6
[INFO] finished tweaking crates.io crate korean_numbers 0.6.6
[INFO] tweaked toml for crates.io crate korean_numbers 0.6.6 written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "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" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 522e2f51526f1a0971dece944ab09e78946f4b6c225392bf47f8b811074b3234
[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" "522e2f51526f1a0971dece944ab09e78946f4b6c225392bf47f8b811074b3234", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "522e2f51526f1a0971dece944ab09e78946f4b6c225392bf47f8b811074b3234", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "522e2f51526f1a0971dece944ab09e78946f4b6c225392bf47f8b811074b3234", kill_on_drop: false }`
[INFO] [stdout] 522e2f51526f1a0971dece944ab09e78946f4b6c225392bf47f8b811074b3234
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "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" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a3dbd00f6204b4a819016350b8e00272bbe58a85bc50ac08e3c84607616539dd
[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" "a3dbd00f6204b4a819016350b8e00272bbe58a85bc50ac08e3c84607616539dd", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-complex v0.2.4
[INFO] [stderr]    Compiling num-bigint v0.2.6
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]    Compiling num-rational v0.2.4
[INFO] [stderr]    Compiling num v0.2.1
[INFO] [stderr]    Compiling korean_numbers v0.6.6 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/errors.rs:24:32
[INFO] [stdout]    |
[INFO] [stdout] 24 |     fn cause(&self) -> Option<&error::Error> {
[INFO] [stdout]    |                                ^^^^^^^^^^^^ help: use `dyn`: `dyn error::Error`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]   --> src/utilities.rs:37:5
[INFO] [stdout]    |
[INFO] [stdout] 37 |     (char >= SYLLABLE_START && char <= SYLLABLE_END)
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `left_side_chars`
[INFO] [stdout]    --> src/parse.rs:171:9
[INFO] [stdout]     |
[INFO] [stdout] 171 |     let mut left_side_chars: Vec<char> = vec![];
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_left_side_chars`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `left_side`
[INFO] [stdout]    --> src/parse.rs:169:28
[INFO] [stdout]     |
[INFO] [stdout] 169 | pub fn parse_hangeul_float(left_side: Vec<char>, right_side: Vec<char>) -> String {
[INFO] [stdout]     |                            ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_left_side`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `right_side`
[INFO] [stdout]    --> src/parse.rs:169:50
[INFO] [stdout]     |
[INFO] [stdout] 169 | pub fn parse_hangeul_float(left_side: Vec<char>, right_side: Vec<char>) -> String {
[INFO] [stdout]     |                                                  ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_right_side`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/parse.rs:170:9
[INFO] [stdout]     |
[INFO] [stdout] 170 |     let mut output = String::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/parse.rs:171:9
[INFO] [stdout]     |
[INFO] [stdout] 171 |     let mut left_side_chars: Vec<char> = vec![];
[INFO] [stdout]     |         ----^^^^^^^^^^^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Fraction`
[INFO] [stdout]   --> src/math.rs:35:5
[INFO] [stdout]    |
[INFO] [stdout] 35 |     Fraction,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `EndingType`
[INFO] [stdout]   --> src/numbers.rs:81:10
[INFO] [stdout]    |
[INFO] [stdout] 81 | pub enum EndingType {
[INFO] [stdout]    |          ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `subject_particle`
[INFO] [stdout]   --> src/numbers.rs:87:12
[INFO] [stdout]    |
[INFO] [stdout] 87 |     pub fn subject_particle(&self) -> &str {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `topic_particle`
[INFO] [stdout]   --> src/numbers.rs:94:12
[INFO] [stdout]    |
[INFO] [stdout] 94 |     pub fn topic_particle(&self) -> &str {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `ending_type`
[INFO] [stdout]    --> src/numbers.rs:155:12
[INFO] [stdout]     |
[INFO] [stdout] 155 |     pub fn ending_type(&self) -> EndingType {
[INFO] [stdout]     |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `parse_hangeul_float`
[INFO] [stdout]    --> src/parse.rs:169:8
[INFO] [stdout]     |
[INFO] [stdout] 169 | pub fn parse_hangeul_float(left_side: Vec<char>, right_side: Vec<char>) -> String {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.66s
[INFO] running `Command { std: "docker" "inspect" "a3dbd00f6204b4a819016350b8e00272bbe58a85bc50ac08e3c84607616539dd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a3dbd00f6204b4a819016350b8e00272bbe58a85bc50ac08e3c84607616539dd", kill_on_drop: false }`
[INFO] [stdout] a3dbd00f6204b4a819016350b8e00272bbe58a85bc50ac08e3c84607616539dd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "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" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] abeb792ef3d419b2669d0a2ccff8678e3288f4af0092095b5c90817e0937fa82
[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" "abeb792ef3d419b2669d0a2ccff8678e3288f4af0092095b5c90817e0937fa82", kill_on_drop: false }`
[INFO] [stderr]    Compiling korean_numbers v0.6.6 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/errors.rs:24:32
[INFO] [stdout]    |
[INFO] [stdout] 24 |     fn cause(&self) -> Option<&error::Error> {
[INFO] [stdout]    |                                ^^^^^^^^^^^^ help: use `dyn`: `dyn error::Error`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]   --> src/utilities.rs:37:5
[INFO] [stdout]    |
[INFO] [stdout] 37 |     (char >= SYLLABLE_START && char <= SYLLABLE_END)
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `left_side_chars`
[INFO] [stdout]    --> src/parse.rs:171:9
[INFO] [stdout]     |
[INFO] [stdout] 171 |     let mut left_side_chars: Vec<char> = vec![];
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_left_side_chars`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `left_side`
[INFO] [stdout]    --> src/parse.rs:169:28
[INFO] [stdout]     |
[INFO] [stdout] 169 | pub fn parse_hangeul_float(left_side: Vec<char>, right_side: Vec<char>) -> String {
[INFO] [stdout]     |                            ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_left_side`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `right_side`
[INFO] [stdout]    --> src/parse.rs:169:50
[INFO] [stdout]     |
[INFO] [stdout] 169 | pub fn parse_hangeul_float(left_side: Vec<char>, right_side: Vec<char>) -> String {
[INFO] [stdout]     |                                                  ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_right_side`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/parse.rs:170:9
[INFO] [stdout]     |
[INFO] [stdout] 170 |     let mut output = String::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/parse.rs:171:9
[INFO] [stdout]     |
[INFO] [stdout] 171 |     let mut left_side_chars: Vec<char> = vec![];
[INFO] [stdout]     |         ----^^^^^^^^^^^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Fraction`
[INFO] [stdout]   --> src/math.rs:35:5
[INFO] [stdout]    |
[INFO] [stdout] 35 |     Fraction,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `EndingType`
[INFO] [stdout]   --> src/numbers.rs:81:10
[INFO] [stdout]    |
[INFO] [stdout] 81 | pub enum EndingType {
[INFO] [stdout]    |          ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `subject_particle`
[INFO] [stdout]   --> src/numbers.rs:87:12
[INFO] [stdout]    |
[INFO] [stdout] 87 |     pub fn subject_particle(&self) -> &str {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `topic_particle`
[INFO] [stdout]   --> src/numbers.rs:94:12
[INFO] [stdout]    |
[INFO] [stdout] 94 |     pub fn topic_particle(&self) -> &str {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `ending_type`
[INFO] [stdout]    --> src/numbers.rs:155:12
[INFO] [stdout]     |
[INFO] [stdout] 155 |     pub fn ending_type(&self) -> EndingType {
[INFO] [stdout]     |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `parse_hangeul_float`
[INFO] [stdout]    --> src/parse.rs:169:8
[INFO] [stdout]     |
[INFO] [stdout] 169 | pub fn parse_hangeul_float(left_side: Vec<char>, right_side: Vec<char>) -> String {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/errors.rs:24:32
[INFO] [stdout]    |
[INFO] [stdout] 24 |     fn cause(&self) -> Option<&error::Error> {
[INFO] [stdout]    |                                ^^^^^^^^^^^^ help: use `dyn`: `dyn error::Error`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]   --> src/utilities.rs:37:5
[INFO] [stdout]    |
[INFO] [stdout] 37 |     (char >= SYLLABLE_START && char <= SYLLABLE_END)
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Float`
[INFO] [stdout]  --> tests/test.rs:4:16
[INFO] [stdout]   |
[INFO] [stdout] 4 | use num::{pow, Float, BigInt};
[INFO] [stdout]   |                ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `subject`
[INFO] [stdout]    --> tests/test.rs:347:10
[INFO] [stdout]     |
[INFO] [stdout] 347 |     for (subject, topic, c) in testcases {
[INFO] [stdout]     |          ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_subject`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `topic`
[INFO] [stdout]    --> tests/test.rs:347:19
[INFO] [stdout]     |
[INFO] [stdout] 347 |     for (subject, topic, c) in testcases {
[INFO] [stdout]     |                   ^^^^^ help: if this is intentional, prefix it with an underscore: `_topic`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]    --> tests/test.rs:347:26
[INFO] [stdout]     |
[INFO] [stdout] 347 |     for (subject, topic, c) in testcases {
[INFO] [stdout]     |                          ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `testcases`
[INFO] [stdout]    --> tests/test.rs:357:9
[INFO] [stdout]     |
[INFO] [stdout] 357 |     let testcases = vec![
[INFO] [stdout]     |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_testcases`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `left_side_chars`
[INFO] [stdout]    --> src/parse.rs:171:9
[INFO] [stdout]     |
[INFO] [stdout] 171 |     let mut left_side_chars: Vec<char> = vec![];
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_left_side_chars`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `left_side`
[INFO] [stdout]    --> src/parse.rs:169:28
[INFO] [stdout]     |
[INFO] [stdout] 169 | pub fn parse_hangeul_float(left_side: Vec<char>, right_side: Vec<char>) -> String {
[INFO] [stdout]     |                            ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_left_side`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `right_side`
[INFO] [stdout]    --> src/parse.rs:169:50
[INFO] [stdout]     |
[INFO] [stdout] 169 | pub fn parse_hangeul_float(left_side: Vec<char>, right_side: Vec<char>) -> String {
[INFO] [stdout]     |                                                  ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_right_side`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `it_determines_vowels`
[INFO] [stdout]    --> tests/test.rs:334:4
[INFO] [stdout]     |
[INFO] [stdout] 334 | fn it_determines_vowels() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `math_operators`
[INFO] [stdout]    --> tests/test.rs:356:4
[INFO] [stdout]     |
[INFO] [stdout] 356 | fn math_operators() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/parse.rs:170:9
[INFO] [stdout]     |
[INFO] [stdout] 170 |     let mut output = String::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/parse.rs:171:9
[INFO] [stdout]     |
[INFO] [stdout] 171 |     let mut left_side_chars: Vec<char> = vec![];
[INFO] [stdout]     |         ----^^^^^^^^^^^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Fraction`
[INFO] [stdout]   --> src/math.rs:35:5
[INFO] [stdout]    |
[INFO] [stdout] 35 |     Fraction,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `EndingType`
[INFO] [stdout]   --> src/numbers.rs:81:10
[INFO] [stdout]    |
[INFO] [stdout] 81 | pub enum EndingType {
[INFO] [stdout]    |          ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `subject_particle`
[INFO] [stdout]   --> src/numbers.rs:87:12
[INFO] [stdout]    |
[INFO] [stdout] 87 |     pub fn subject_particle(&self) -> &str {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `topic_particle`
[INFO] [stdout]   --> src/numbers.rs:94:12
[INFO] [stdout]    |
[INFO] [stdout] 94 |     pub fn topic_particle(&self) -> &str {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `ending_type`
[INFO] [stdout]    --> src/numbers.rs:155:12
[INFO] [stdout]     |
[INFO] [stdout] 155 |     pub fn ending_type(&self) -> EndingType {
[INFO] [stdout]     |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `parse_hangeul_float`
[INFO] [stdout]    --> src/parse.rs:169:8
[INFO] [stdout]     |
[INFO] [stdout] 169 | pub fn parse_hangeul_float(left_side: Vec<char>, right_side: Vec<char>) -> String {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.93s
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "abeb792ef3d419b2669d0a2ccff8678e3288f4af0092095b5c90817e0937fa82", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "abeb792ef3d419b2669d0a2ccff8678e3288f4af0092095b5c90817e0937fa82", kill_on_drop: false }`
[INFO] [stdout] abeb792ef3d419b2669d0a2ccff8678e3288f4af0092095b5c90817e0937fa82
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "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" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] c75849245252a9b949a608159a9f6c847a3542bc55b25f863623a125b9ca87ad
[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" "c75849245252a9b949a608159a9f6c847a3542bc55b25f863623a125b9ca87ad", kill_on_drop: false }`
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/errors.rs:24:32
[INFO] [stderr]    |
[INFO] [stderr] 24 |     fn cause(&self) -> Option<&error::Error> {
[INFO] [stderr]    |                                ^^^^^^^^^^^^ help: use `dyn`: `dyn error::Error`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]   --> src/utilities.rs:37:5
[INFO] [stderr]    |
[INFO] [stderr] 37 |     (char >= SYLLABLE_START && char <= SYLLABLE_END)
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `left_side_chars`
[INFO] [stderr]    --> src/parse.rs:171:9
[INFO] [stderr]     |
[INFO] [stderr] 171 |     let mut left_side_chars: Vec<char> = vec![];
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_left_side_chars`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `left_side`
[INFO] [stderr]    --> src/parse.rs:169:28
[INFO] [stderr]     |
[INFO] [stderr] 169 | pub fn parse_hangeul_float(left_side: Vec<char>, right_side: Vec<char>) -> String {
[INFO] [stderr]     |                            ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_left_side`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `right_side`
[INFO] [stderr]    --> src/parse.rs:169:50
[INFO] [stderr]     |
[INFO] [stderr] 169 | pub fn parse_hangeul_float(left_side: Vec<char>, right_side: Vec<char>) -> String {
[INFO] [stderr]     |                                                  ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_right_side`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/parse.rs:170:9
[INFO] [stderr]     |
[INFO] [stderr] 170 |     let mut output = String::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/parse.rs:171:9
[INFO] [stderr]     |
[INFO] [stderr] 171 |     let mut left_side_chars: Vec<char> = vec![];
[INFO] [stderr]     |         ----^^^^^^^^^^^^^^^
[INFO] [stderr]     |         |
[INFO] [stderr]     |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Fraction`
[INFO] [stderr]   --> src/math.rs:35:5
[INFO] [stderr]    |
[INFO] [stderr] 35 |     Fraction,
[INFO] [stderr]    |     ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `EndingType`
[INFO] [stderr]   --> src/numbers.rs:81:10
[INFO] [stderr]    |
[INFO] [stderr] 81 | pub enum EndingType {
[INFO] [stderr]    |          ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `subject_particle`
[INFO] [stderr]   --> src/numbers.rs:87:12
[INFO] [stderr]    |
[INFO] [stderr] 87 |     pub fn subject_particle(&self) -> &str {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `topic_particle`
[INFO] [stderr]   --> src/numbers.rs:94:12
[INFO] [stderr]    |
[INFO] [stderr] 94 |     pub fn topic_particle(&self) -> &str {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `ending_type`
[INFO] [stderr]    --> src/numbers.rs:155:12
[INFO] [stderr]     |
[INFO] [stderr] 155 |     pub fn ending_type(&self) -> EndingType {
[INFO] [stderr]     |            ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `parse_hangeul_float`
[INFO] [stderr]    --> src/parse.rs:169:8
[INFO] [stderr]     |
[INFO] [stderr] 169 | pub fn parse_hangeul_float(left_side: Vec<char>, right_side: Vec<char>) -> String {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 13 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/errors.rs:24:32
[INFO] [stderr]    |
[INFO] [stderr] 24 |     fn cause(&self) -> Option<&error::Error> {
[INFO] [stderr]    |                                ^^^^^^^^^^^^ help: use `dyn`: `dyn error::Error`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]   --> src/utilities.rs:37:5
[INFO] [stderr]    |
[INFO] [stderr] 37 |     (char >= SYLLABLE_START && char <= SYLLABLE_END)
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `left_side_chars`
[INFO] [stderr]    --> src/parse.rs:171:9
[INFO] [stderr]     |
[INFO] [stderr] 171 |     let mut left_side_chars: Vec<char> = vec![];
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_left_side_chars`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `left_side`
[INFO] [stderr]    --> src/parse.rs:169:28
[INFO] [stderr]     |
[INFO] [stderr] 169 | pub fn parse_hangeul_float(left_side: Vec<char>, right_side: Vec<char>) -> String {
[INFO] [stderr]     |                            ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_left_side`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `right_side`
[INFO] [stderr]    --> src/parse.rs:169:50
[INFO] [stderr]     |
[INFO] [stderr] 169 | pub fn parse_hangeul_float(left_side: Vec<char>, right_side: Vec<char>) -> String {
[INFO] [stderr]     |                                                  ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_right_side`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/parse.rs:170:9
[INFO] [stderr]     |
[INFO] [stderr] 170 |     let mut output = String::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/parse.rs:171:9
[INFO] [stderr]     |
[INFO] [stderr] 171 |     let mut left_side_chars: Vec<char> = vec![];
[INFO] [stderr]     |         ----^^^^^^^^^^^^^^^
[INFO] [stderr]     |         |
[INFO] [stderr]     |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Fraction`
[INFO] [stderr]   --> src/math.rs:35:5
[INFO] [stderr]    |
[INFO] [stderr] 35 |     Fraction,
[INFO] [stderr]    |     ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `EndingType`
[INFO] [stderr]   --> src/numbers.rs:81:10
[INFO] [stderr]    |
[INFO] [stderr] 81 | pub enum EndingType {
[INFO] [stderr]    |          ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `subject_particle`
[INFO] [stderr]   --> src/numbers.rs:87:12
[INFO] [stderr]    |
[INFO] [stderr] 87 |     pub fn subject_particle(&self) -> &str {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `topic_particle`
[INFO] [stderr]   --> src/numbers.rs:94:12
[INFO] [stderr]    |
[INFO] [stderr] 94 |     pub fn topic_particle(&self) -> &str {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `ending_type`
[INFO] [stderr]    --> src/numbers.rs:155:12
[INFO] [stderr]     |
[INFO] [stderr] 155 |     pub fn ending_type(&self) -> EndingType {
[INFO] [stderr]     |            ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `parse_hangeul_float`
[INFO] [stderr]    --> src/parse.rs:169:8
[INFO] [stderr]     |
[INFO] [stderr] 169 | pub fn parse_hangeul_float(left_side: Vec<char>, right_side: Vec<char>) -> String {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 13 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Float`
[INFO] [stderr]  --> tests/test.rs:4:16
[INFO] [stderr]   |
[INFO] [stderr] 4 | use num::{pow, Float, BigInt};
[INFO] [stderr]   |                ^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `subject`
[INFO] [stderr]    --> tests/test.rs:347:10
[INFO] [stderr]     |
[INFO] [stderr] 347 |     for (subject, topic, c) in testcases {
[INFO] [stderr]     |          ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_subject`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `topic`
[INFO] [stderr]    --> tests/test.rs:347:19
[INFO] [stderr]     |
[INFO] [stderr] 347 |     for (subject, topic, c) in testcases {
[INFO] [stderr]     |                   ^^^^^ help: if this is intentional, prefix it with an underscore: `_topic`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `c`
[INFO] [stderr]    --> tests/test.rs:347:26
[INFO] [stderr]     |
[INFO] [stderr] 347 |     for (subject, topic, c) in testcases {
[INFO] [stderr]     |                          ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `testcases`
[INFO] [stderr]    --> tests/test.rs:357:9
[INFO] [stderr]     |
[INFO] [stderr] 357 |     let testcases = vec![
[INFO] [stderr]     |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_testcases`
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `it_determines_vowels`
[INFO] [stderr]    --> tests/test.rs:334:4
[INFO] [stderr]     |
[INFO] [stderr] 334 | fn it_determines_vowels() {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `math_operators`
[INFO] [stderr]    --> tests/test.rs:356:4
[INFO] [stderr]     |
[INFO] [stderr] 356 | fn math_operators() {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 7 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/korean_nums-7cae430df070e5bf
[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] [stderr]      Running /opt/rustwide/target/debug/deps/test-240d71050291e2cf
[INFO] [stdout] 
[INFO] [stdout] running 9 tests
[INFO] [stdout] test it_handles_digits_sino ... ok
[INFO] [stdout] test it_handles_big_zeroes_sino ... ok
[INFO] [stdout] test it_handles_math_expressions ... ok
[INFO] [stdout] test it_handles_mixed_digits_zeroes_money ... ok
[INFO] [stdout] test it_handles_mixed_digits_zeroes_negative ... ok
[INFO] [stdout] test it_handles_ten_through_ninety_nine_pure ... ok
[INFO] [stdout] test it_handles_mixed_digits_zeroes_sino ... ok
[INFO] [stdout] test it_handles_zeroes_sino ... ok
[INFO] [stderr]    Doc-tests korean_nums
[INFO] [stdout] test it_handles_zero_through_nine_korean ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 9 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]   --> /opt/rustwide/workdir/src/utilities.rs:37:5
[INFO] [stderr]    |
[INFO] [stderr] 37 |     (char >= SYLLABLE_START && char <= SYLLABLE_END)
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[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" "c75849245252a9b949a608159a9f6c847a3542bc55b25f863623a125b9ca87ad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c75849245252a9b949a608159a9f6c847a3542bc55b25f863623a125b9ca87ad", kill_on_drop: false }`
[INFO] [stdout] c75849245252a9b949a608159a9f6c847a3542bc55b25f863623a125b9ca87ad