[INFO] updating cached repository https://github.com/alekratz/file-lang
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/mnt/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 05ab26ebeaa2932b4e5086db52ed1abad3c25894
[INFO] checking alekratz/file-lang against try#e689e5eaefe96e6dc3ed5bb629c521b7d207aff7 for pr-64398
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Falekratz%2Ffile-lang" "work/builds/worker-6/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/alekratz/file-lang on toolchain e689e5eaefe96e6dc3ed5bb629c521b7d207aff7-alt
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+e689e5eaefe96e6dc3ed5bb629c521b7d207aff7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/alekratz/file-lang
[INFO] finished tweaking git repo https://github.com/alekratz/file-lang
[INFO] tweaked toml for git repo https://github.com/alekratz/file-lang written to work/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/alekratz/file-lang already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+e689e5eaefe96e6dc3ed5bb629c521b7d207aff7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/mnt/big/crater/work/builds/worker-6/source:/opt/rustwide/workdir:ro,Z" "-v" "/mnt/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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" "/opt/rustwide/cargo-home/bin/cargo" "+e689e5eaefe96e6dc3ed5bb629c521b7d207aff7-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 7797dd5eed8a48cdba9ab3438afd6113cf0afe89063b167d656f733c62e190d7
[INFO] running `"docker" "start" "-a" "7797dd5eed8a48cdba9ab3438afd6113cf0afe89063b167d656f733c62e190d7"`
[INFO] [stderr]     Checking backtrace-sys v0.1.31
[INFO] [stderr]    Compiling snafu-derive v0.5.0
[INFO] [stderr]     Checking backtrace v0.3.37
[INFO] [stderr]     Checking snafu v0.5.0
[INFO] [stderr]     Checking file-lang v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: type alias is never used: `Result`
[INFO] [stderr]  --> src/syn/lexer.rs:8:1
[INFO] [stderr]   |
[INFO] [stderr] 8 | type Result<T> = std::result::Result<T, LexerError>;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `is_ident_start_char`
[INFO] [stderr]   --> src/syn/lexer.rs:17:9
[INFO] [stderr]    |
[INFO] [stderr] 17 |           fn $predicate (c: char) -> bool {
[INFO] [stderr]    |           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 24 | / char_types! {
[INFO] [stderr] 25 | |     is_ident_start_char => 'a' ..= 'z' | 'A' ..= 'Z' | '_',
[INFO] [stderr] 26 | |     is_ident_char => 'a' ..= 'z' | 'A' ..= 'Z' | '0' ..= '9' | '_',
[INFO] [stderr] 27 | | }
[INFO] [stderr]    | |_- in this macro invocation
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `is_ident_char`
[INFO] [stderr]   --> src/syn/lexer.rs:17:9
[INFO] [stderr]    |
[INFO] [stderr] 17 |           fn $predicate (c: char) -> bool {
[INFO] [stderr]    |           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 24 | / char_types! {
[INFO] [stderr] 25 | |     is_ident_start_char => 'a' ..= 'z' | 'A' ..= 'Z' | '_',
[INFO] [stderr] 26 | |     is_ident_char => 'a' ..= 'z' | 'A' ..= 'Z' | '0' ..= '9' | '_',
[INFO] [stderr] 27 | | }
[INFO] [stderr]    | |_- in this macro invocation
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `NUM_START_CHARS`
[INFO] [stderr]   --> src/syn/lexer.rs:29:1
[INFO] [stderr]    |
[INFO] [stderr] 29 | const NUM_START_CHARS: &[char] = &['0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '.'];
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `DEC_NUM_CHARS`
[INFO] [stderr]   --> src/syn/lexer.rs:30:1
[INFO] [stderr]    |
[INFO] [stderr] 30 | const DEC_NUM_CHARS: &[char] = &['0', '1', '2', '3', '4', '5', '6', '7', '8', '9'];
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `HEX_NUM_CHARS`
[INFO] [stderr]   --> src/syn/lexer.rs:31:1
[INFO] [stderr]    |
[INFO] [stderr] 31 | / const HEX_NUM_CHARS: &[char] = &[
[INFO] [stderr] 32 | |     '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f', 'A', 'B', 'C',
[INFO] [stderr] 33 | |     'D', 'E', 'F',
[INFO] [stderr] 34 | | ];
[INFO] [stderr]    | |__^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `OCT_NUM_CHARS`
[INFO] [stderr]   --> src/syn/lexer.rs:35:1
[INFO] [stderr]    |
[INFO] [stderr] 35 | const OCT_NUM_CHARS: &[char] = &['0', '1', '2', '3', '4', '5', '6', '7'];
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `BIN_NUM_CHARS`
[INFO] [stderr]   --> src/syn/lexer.rs:36:1
[INFO] [stderr]    |
[INFO] [stderr] 36 | const BIN_NUM_CHARS: &[char] = &['0', '1'];
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Lexer`
[INFO] [stderr]   --> src/syn/lexer.rs:38:1
[INFO] [stderr]    |
[INFO] [stderr] 38 | pub struct Lexer<'text> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/syn/lexer.rs:46:5
[INFO] [stderr]    |
[INFO] [stderr] 46 |     pub fn new(text: &'text str) -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `span`
[INFO] [stderr]   --> src/syn/lexer.rs:65:5
[INFO] [stderr]    |
[INFO] [stderr] 65 |     pub fn span(&self) -> Span {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_eof`
[INFO] [stderr]   --> src/syn/lexer.rs:69:5
[INFO] [stderr]    |
[INFO] [stderr] 69 |     pub fn is_eof(&self) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `catchup`
[INFO] [stderr]   --> src/syn/lexer.rs:73:5
[INFO] [stderr]    |
[INFO] [stderr] 73 |     fn catchup(&mut self) -> Span {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `skip_whitespace`
[INFO] [stderr]   --> src/syn/lexer.rs:79:5
[INFO] [stderr]    |
[INFO] [stderr] 79 |     fn skip_whitespace(&mut self) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `next_token`
[INFO] [stderr]   --> src/syn/lexer.rs:84:5
[INFO] [stderr]    |
[INFO] [stderr] 84 |     pub fn next_token(&mut self) -> Result<Token> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `next_ident`
[INFO] [stderr]    --> src/syn/lexer.rs:103:5
[INFO] [stderr]     |
[INFO] [stderr] 103 |     pub fn next_ident(&mut self) -> Result<Token> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `next_number`
[INFO] [stderr]    --> src/syn/lexer.rs:107:5
[INFO] [stderr]     |
[INFO] [stderr] 107 |     pub fn next_number(&mut self) -> Result<Token> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `next_char_token`
[INFO] [stderr]    --> src/syn/lexer.rs:111:5
[INFO] [stderr]     |
[INFO] [stderr] 111 |     fn next_char_token(&mut self, c: char, kind: TokenKind) -> Result<Token> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `make_token`
[INFO] [stderr]    --> src/syn/lexer.rs:120:5
[INFO] [stderr]     |
[INFO] [stderr] 120 |     fn make_token(&mut self, kind: TokenKind) -> Token {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `expect_predicate`
[INFO] [stderr]    --> src/syn/lexer.rs:126:5
[INFO] [stderr]     |
[INFO] [stderr] 126 | /     fn expect_predicate(
[INFO] [stderr] 127 | |         &mut self,
[INFO] [stderr] 128 | |         predicate: impl Fn(char) -> bool,
[INFO] [stderr] 129 | |         expected: impl ToString,
[INFO] [stderr] ...   |
[INFO] [stderr] 154 | |         }
[INFO] [stderr] 155 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `expect_any_char_message`
[INFO] [stderr]    --> src/syn/lexer.rs:157:5
[INFO] [stderr]     |
[INFO] [stderr] 157 |     fn expect_any_char_message(&mut self, chars: &[char], expected: impl ToString) -> Result<char> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `expect_char_message`
[INFO] [stderr]    --> src/syn/lexer.rs:161:5
[INFO] [stderr]     |
[INFO] [stderr] 161 |     fn expect_char_message(&mut self, ch: char, expected: impl ToString) -> Result<char> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `match_predicate`
[INFO] [stderr]    --> src/syn/lexer.rs:165:5
[INFO] [stderr]     |
[INFO] [stderr] 165 |     fn match_predicate(&mut self, predicate: impl Fn(char) -> bool) -> Option<char> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `match_any_char`
[INFO] [stderr]    --> src/syn/lexer.rs:174:5
[INFO] [stderr]     |
[INFO] [stderr] 174 |     fn match_any_char(&mut self, chars: &[char]) -> Option<char> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `match_char`
[INFO] [stderr]    --> src/syn/lexer.rs:178:5
[INFO] [stderr]     |
[INFO] [stderr] 178 |     fn match_char(&mut self, c: char) -> Option<char> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `adv_char`
[INFO] [stderr]    --> src/syn/lexer.rs:182:5
[INFO] [stderr]     |
[INFO] [stderr] 182 |     fn adv_char(&mut self) -> Option<char> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_any_match`
[INFO] [stderr]    --> src/syn/lexer.rs:188:5
[INFO] [stderr]     |
[INFO] [stderr] 188 |     fn is_any_match(&self, chars: &[char]) -> bool {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `next_char`
[INFO] [stderr]    --> src/syn/lexer.rs:194:5
[INFO] [stderr]     |
[INFO] [stderr] 194 |     fn next_char(&self) -> Option<char> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `curr_char`
[INFO] [stderr]    --> src/syn/lexer.rs:198:5
[INFO] [stderr]     |
[INFO] [stderr] 198 |     fn curr_char(&self) -> Option<char> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Eol`
[INFO] [stderr]  --> src/syn/token.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 |     Eol,
[INFO] [stderr]   |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Eof`
[INFO] [stderr]  --> src/syn/token.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     Eof,
[INFO] [stderr]   |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Ident`
[INFO] [stderr]  --> src/syn/token.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     Ident,
[INFO] [stderr]   |     ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `String`
[INFO] [stderr]  --> src/syn/token.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 |     String,
[INFO] [stderr]   |     ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `DecInt`
[INFO] [stderr]   --> src/syn/token.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     DecInt,
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `BinInt`
[INFO] [stderr]   --> src/syn/token.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 |     BinInt,
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `OctInt`
[INFO] [stderr]   --> src/syn/token.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     OctInt,
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `HexInt`
[INFO] [stderr]   --> src/syn/token.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 |     HexInt,
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Real`
[INFO] [stderr]   --> src/syn/token.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 |     Real,
[INFO] [stderr]    |     ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `UnOp`
[INFO] [stderr]   --> src/syn/token.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 |     UnOp,
[INFO] [stderr]    |     ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `BinOp`
[INFO] [stderr]   --> src/syn/token.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 |     BinOp,
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `LParen`
[INFO] [stderr]   --> src/syn/token.rs:19:5
[INFO] [stderr]    |
[INFO] [stderr] 19 |     LParen,
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `RParen`
[INFO] [stderr]   --> src/syn/token.rs:20:5
[INFO] [stderr]    |
[INFO] [stderr] 20 |     RParen,
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `LBrace`
[INFO] [stderr]   --> src/syn/token.rs:21:5
[INFO] [stderr]    |
[INFO] [stderr] 21 |     LBrace,
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `RBrace`
[INFO] [stderr]   --> src/syn/token.rs:22:5
[INFO] [stderr]    |
[INFO] [stderr] 22 |     RBrace,
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `KwFn`
[INFO] [stderr]   --> src/syn/token.rs:24:5
[INFO] [stderr]    |
[INFO] [stderr] 24 |     KwFn,
[INFO] [stderr]    |     ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/syn/token.rs:36:5
[INFO] [stderr]    |
[INFO] [stderr] 36 |     pub fn new(kind: TokenKind, text: &'text str, span: Span) -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `kind`
[INFO] [stderr]   --> src/syn/token.rs:44:5
[INFO] [stderr]    |
[INFO] [stderr] 44 |     pub fn kind(&self) -> TokenKind {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `text`
[INFO] [stderr]   --> src/syn/token.rs:48:5
[INFO] [stderr]    |
[INFO] [stderr] 48 |     pub fn text(&self) -> &'text str {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `span`
[INFO] [stderr]   --> src/syn/token.rs:52:5
[INFO] [stderr]    |
[INFO] [stderr] 52 |     pub fn span(&self) -> Span {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `adv`
[INFO] [stderr]   --> src/common/span.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 |     pub fn adv(&mut self, c: char) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `adv_by`
[INFO] [stderr]   --> src/common/span.rs:19:5
[INFO] [stderr]    |
[INFO] [stderr] 19 |     pub fn adv_by(&mut self, s: &str) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `line`
[INFO] [stderr]   --> src/common/span.rs:25:5
[INFO] [stderr]    |
[INFO] [stderr] 25 |     pub fn line(&mut self) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/common/span.rs:50:5
[INFO] [stderr]    |
[INFO] [stderr] 50 |     pub fn new(start: Pos, end: Pos) -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `len`
[INFO] [stderr]   --> src/common/span.rs:54:5
[INFO] [stderr]    |
[INFO] [stderr] 54 |     pub fn len(&self) -> usize {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `is_ident_start_char`
[INFO] [stderr]   --> src/syn/lexer.rs:17:9
[INFO] [stderr]    |
[INFO] [stderr] 17 |           fn $predicate (c: char) -> bool {
[INFO] [stderr]    |           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 24 | / char_types! {
[INFO] [stderr] 25 | |     is_ident_start_char => 'a' ..= 'z' | 'A' ..= 'Z' | '_',
[INFO] [stderr] 26 | |     is_ident_char => 'a' ..= 'z' | 'A' ..= 'Z' | '0' ..= '9' | '_',
[INFO] [stderr] 27 | | }
[INFO] [stderr]    | |_- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `is_ident_char`
[INFO] [stderr]   --> src/syn/lexer.rs:17:9
[INFO] [stderr]    |
[INFO] [stderr] 17 |           fn $predicate (c: char) -> bool {
[INFO] [stderr]    |           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 24 | / char_types! {
[INFO] [stderr] 25 | |     is_ident_start_char => 'a' ..= 'z' | 'A' ..= 'Z' | '_',
[INFO] [stderr] 26 | |     is_ident_char => 'a' ..= 'z' | 'A' ..= 'Z' | '0' ..= '9' | '_',
[INFO] [stderr] 27 | | }
[INFO] [stderr]    | |_- in this macro invocation
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `NUM_START_CHARS`
[INFO] [stderr]   --> src/syn/lexer.rs:29:1
[INFO] [stderr]    |
[INFO] [stderr] 29 | const NUM_START_CHARS: &[char] = &['0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '.'];
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `DEC_NUM_CHARS`
[INFO] [stderr]   --> src/syn/lexer.rs:30:1
[INFO] [stderr]    |
[INFO] [stderr] 30 | const DEC_NUM_CHARS: &[char] = &['0', '1', '2', '3', '4', '5', '6', '7', '8', '9'];
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `HEX_NUM_CHARS`
[INFO] [stderr]   --> src/syn/lexer.rs:31:1
[INFO] [stderr]    |
[INFO] [stderr] 31 | / const HEX_NUM_CHARS: &[char] = &[
[INFO] [stderr] 32 | |     '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f', 'A', 'B', 'C',
[INFO] [stderr] 33 | |     'D', 'E', 'F',
[INFO] [stderr] 34 | | ];
[INFO] [stderr]    | |__^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `OCT_NUM_CHARS`
[INFO] [stderr]   --> src/syn/lexer.rs:35:1
[INFO] [stderr]    |
[INFO] [stderr] 35 | const OCT_NUM_CHARS: &[char] = &['0', '1', '2', '3', '4', '5', '6', '7'];
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `BIN_NUM_CHARS`
[INFO] [stderr]   --> src/syn/lexer.rs:36:1
[INFO] [stderr]    |
[INFO] [stderr] 36 | const BIN_NUM_CHARS: &[char] = &['0', '1'];
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `expect_predicate`
[INFO] [stderr]    --> src/syn/lexer.rs:126:5
[INFO] [stderr]     |
[INFO] [stderr] 126 | /     fn expect_predicate(
[INFO] [stderr] 127 | |         &mut self,
[INFO] [stderr] 128 | |         predicate: impl Fn(char) -> bool,
[INFO] [stderr] 129 | |         expected: impl ToString,
[INFO] [stderr] ...   |
[INFO] [stderr] 154 | |         }
[INFO] [stderr] 155 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `expect_any_char_message`
[INFO] [stderr]    --> src/syn/lexer.rs:157:5
[INFO] [stderr]     |
[INFO] [stderr] 157 |     fn expect_any_char_message(&mut self, chars: &[char], expected: impl ToString) -> Result<char> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `expect_char_message`
[INFO] [stderr]    --> src/syn/lexer.rs:161:5
[INFO] [stderr]     |
[INFO] [stderr] 161 |     fn expect_char_message(&mut self, ch: char, expected: impl ToString) -> Result<char> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_any_match`
[INFO] [stderr]    --> src/syn/lexer.rs:188:5
[INFO] [stderr]     |
[INFO] [stderr] 188 |     fn is_any_match(&self, chars: &[char]) -> bool {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `next_char`
[INFO] [stderr]    --> src/syn/lexer.rs:194:5
[INFO] [stderr]     |
[INFO] [stderr] 194 |     fn next_char(&self) -> Option<char> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Ident`
[INFO] [stderr]  --> src/syn/token.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     Ident,
[INFO] [stderr]   |     ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `String`
[INFO] [stderr]  --> src/syn/token.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 |     String,
[INFO] [stderr]   |     ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `UnOp`
[INFO] [stderr]   --> src/syn/token.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 |     UnOp,
[INFO] [stderr]    |     ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `BinOp`
[INFO] [stderr]   --> src/syn/token.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 |     BinOp,
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `KwFn`
[INFO] [stderr]   --> src/syn/token.rs:24:5
[INFO] [stderr]    |
[INFO] [stderr] 24 |     KwFn,
[INFO] [stderr]    |     ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `span`
[INFO] [stderr]   --> src/syn/token.rs:52:5
[INFO] [stderr]    |
[INFO] [stderr] 52 |     pub fn span(&self) -> Span {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `adv_by`
[INFO] [stderr]   --> src/common/span.rs:19:5
[INFO] [stderr]    |
[INFO] [stderr] 19 |     pub fn adv_by(&mut self, s: &str) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `line`
[INFO] [stderr]   --> src/common/span.rs:25:5
[INFO] [stderr]    |
[INFO] [stderr] 25 |     pub fn line(&mut self) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `len`
[INFO] [stderr]   --> src/common/span.rs:54:5
[INFO] [stderr]    |
[INFO] [stderr] 54 |     pub fn len(&self) -> usize {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 16.88s
[INFO] running `"docker" "inspect" "7797dd5eed8a48cdba9ab3438afd6113cf0afe89063b167d656f733c62e190d7"`
[INFO] running `"docker" "rm" "-f" "7797dd5eed8a48cdba9ab3438afd6113cf0afe89063b167d656f733c62e190d7"`
[INFO] [stdout] 7797dd5eed8a48cdba9ab3438afd6113cf0afe89063b167d656f733c62e190d7