[INFO] cloning repository https://github.com/emi2k01/mejorable
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/emi2k01/mejorable" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Femi2k01%2Fmejorable", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Femi2k01%2Fmejorable'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 402f8256178534dfc771ff7dee54039b992ae421
[INFO] checking emi2k01/mejorable against master#36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923 for pr-81863
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Femi2k01%2Fmejorable" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/emi2k01/mejorable on toolchain 36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/emi2k01/mejorable
[INFO] finished tweaking git repo https://github.com/emi2k01/mejorable
[INFO] tweaked toml for git repo https://github.com/emi2k01/mejorable written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/emi2k01/mejorable already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 7d8f348c77120633d23ae4d17cfe18aabb398d18c80f649d73bd5cfad6760d6f
[INFO] running `Command { std: "docker" "start" "-a" "7d8f348c77120633d23ae4d17cfe18aabb398d18c80f649d73bd5cfad6760d6f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7d8f348c77120633d23ae4d17cfe18aabb398d18c80f649d73bd5cfad6760d6f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7d8f348c77120633d23ae4d17cfe18aabb398d18c80f649d73bd5cfad6760d6f", kill_on_drop: false }`
[INFO] [stdout] 7d8f348c77120633d23ae4d17cfe18aabb398d18c80f649d73bd5cfad6760d6f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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=forbid" "-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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 496ceaf640d750869900e1b3047485442652afbed5ed61d5fc051056b00d24b1
[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" "496ceaf640d750869900e1b3047485442652afbed5ed61d5fc051056b00d24b1", kill_on_drop: false }`
[INFO] [stderr]    Compiling anyhow v1.0.38
[INFO] [stderr]     Checking mejorable v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/parser/lexer.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 |     pub fn new(line: &'a [char]) -> Self {
[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: `tokens`
[INFO] [stdout]   --> src/parser/lexer.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 17 |     pub fn tokens(&mut self) -> Vec<Token> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `lex_single_line_func`
[INFO] [stdout]   --> src/parser/lexer.rs:27:12
[INFO] [stdout]    |
[INFO] [stdout] 27 |     pub fn lex_single_line_func(&mut self) {}
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `lex_multi_line_func`
[INFO] [stdout]   --> src/parser/lexer.rs:29:12
[INFO] [stdout]    |
[INFO] [stdout] 29 |     pub fn lex_multi_line_func(&mut self) {}
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `lex_paragraph`
[INFO] [stdout]   --> src/parser/lexer.rs:31:12
[INFO] [stdout]    |
[INFO] [stdout] 31 |     pub fn lex_paragraph(&mut self) {}
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `cur_char`
[INFO] [stdout]   --> src/parser/lexer.rs:33:8
[INFO] [stdout]    |
[INFO] [stdout] 33 |     fn cur_char(&self) -> char {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `advance`
[INFO] [stdout]   --> src/parser/lexer.rs:37:8
[INFO] [stdout]    |
[INFO] [stdout] 37 |     fn advance(&mut self) {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `peek`
[INFO] [stdout]   --> src/parser/lexer.rs:41:8
[INFO] [stdout]    |
[INFO] [stdout] 41 |     fn peek(&self, n: usize) -> char {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `eat_char`
[INFO] [stdout]   --> src/parser/lexer.rs:45:8
[INFO] [stdout]    |
[INFO] [stdout] 45 |     fn eat_char(&mut self) -> char {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `LeftBracket`
[INFO] [stdout]  --> src/parser/token.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     LeftBracket,
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `RightBracket`
[INFO] [stdout]  --> src/parser/token.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     RightBracket,
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `LeftBrace`
[INFO] [stdout]  --> src/parser/token.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     LeftBrace,
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `RightBrace`
[INFO] [stdout]   --> src/parser/token.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     RightBrace,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Bang`
[INFO] [stdout]   --> src/parser/token.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 |     Bang,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Equal`
[INFO] [stdout]   --> src/parser/token.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 |     Equal,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Colon`
[INFO] [stdout]   --> src/parser/token.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 |     Colon,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `String`
[INFO] [stdout]   --> src/parser/token.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 |     String(String),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Integer`
[INFO] [stdout]   --> src/parser/token.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 20 |     Integer(i32),
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Float`
[INFO] [stdout]   --> src/parser/token.rs:22:5
[INFO] [stdout]    |
[INFO] [stdout] 22 |     Float(f32),
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Option`
[INFO] [stdout]   --> src/parser/token.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 24 |     Option(String),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Text`
[INFO] [stdout]   --> src/parser/token.rs:26:5
[INFO] [stdout]    |
[INFO] [stdout] 26 |     Text(String),
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `chars`
[INFO] [stdout]  --> src/parser.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     chars: Vec<char>,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `cur_idx`
[INFO] [stdout]  --> src/parser.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     cur_idx: usize,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/parser/lexer.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 |     pub fn new(line: &'a [char]) -> Self {
[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: `tokens`
[INFO] [stdout]   --> src/parser/lexer.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 17 |     pub fn tokens(&mut self) -> Vec<Token> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `lex_single_line_func`
[INFO] [stdout]   --> src/parser/lexer.rs:27:12
[INFO] [stdout]    |
[INFO] [stdout] 27 |     pub fn lex_single_line_func(&mut self) {}
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `lex_multi_line_func`
[INFO] [stdout]   --> src/parser/lexer.rs:29:12
[INFO] [stdout]    |
[INFO] [stdout] 29 |     pub fn lex_multi_line_func(&mut self) {}
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `lex_paragraph`
[INFO] [stdout]   --> src/parser/lexer.rs:31:12
[INFO] [stdout]    |
[INFO] [stdout] 31 |     pub fn lex_paragraph(&mut self) {}
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `cur_char`
[INFO] [stdout]   --> src/parser/lexer.rs:33:8
[INFO] [stdout]    |
[INFO] [stdout] 33 |     fn cur_char(&self) -> char {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `advance`
[INFO] [stdout]   --> src/parser/lexer.rs:37:8
[INFO] [stdout]    |
[INFO] [stdout] 37 |     fn advance(&mut self) {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `peek`
[INFO] [stdout]   --> src/parser/lexer.rs:41:8
[INFO] [stdout]    |
[INFO] [stdout] 41 |     fn peek(&self, n: usize) -> char {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `eat_char`
[INFO] [stdout]   --> src/parser/lexer.rs:45:8
[INFO] [stdout]    |
[INFO] [stdout] 45 |     fn eat_char(&mut self) -> char {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `LeftBracket`
[INFO] [stdout]  --> src/parser/token.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     LeftBracket,
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `RightBracket`
[INFO] [stdout]  --> src/parser/token.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     RightBracket,
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `LeftBrace`
[INFO] [stdout]  --> src/parser/token.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     LeftBrace,
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `RightBrace`
[INFO] [stdout]   --> src/parser/token.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     RightBrace,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Bang`
[INFO] [stdout]   --> src/parser/token.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 |     Bang,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Equal`
[INFO] [stdout]   --> src/parser/token.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 |     Equal,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Colon`
[INFO] [stdout]   --> src/parser/token.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 |     Colon,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `String`
[INFO] [stdout]   --> src/parser/token.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 |     String(String),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Integer`
[INFO] [stdout]   --> src/parser/token.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 20 |     Integer(i32),
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Float`
[INFO] [stdout]   --> src/parser/token.rs:22:5
[INFO] [stdout]    |
[INFO] [stdout] 22 |     Float(f32),
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Option`
[INFO] [stdout]   --> src/parser/token.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 24 |     Option(String),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Text`
[INFO] [stdout]   --> src/parser/token.rs:26:5
[INFO] [stdout]    |
[INFO] [stdout] 26 |     Text(String),
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `chars`
[INFO] [stdout]  --> src/parser.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     chars: Vec<char>,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `cur_idx`
[INFO] [stdout]  --> src/parser.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     cur_idx: usize,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 23 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 23 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.52s
[INFO] running `Command { std: "docker" "inspect" "496ceaf640d750869900e1b3047485442652afbed5ed61d5fc051056b00d24b1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "496ceaf640d750869900e1b3047485442652afbed5ed61d5fc051056b00d24b1", kill_on_drop: false }`
[INFO] [stdout] 496ceaf640d750869900e1b3047485442652afbed5ed61d5fc051056b00d24b1