Dec 17 18:06:43.020 INFO checking patallen/SlangVM against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 17 18:06:43.020 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-7/master#96d1334e567237b1507cd277938e7ae2de75ff51:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/master#96d1334e567237b1507cd277938e7ae2de75ff51/gh/patallen/SlangVM:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+96d1334e567237b1507cd277938e7ae2de75ff51-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 17 18:06:43.505 INFO [stdout] 883c159e2bcc3bebf348d33d11059f80e1682df5d2f14ea5ff085d4e8599bd27
Dec 17 18:06:43.508 INFO running `"docker" "start" "-a" "883c159e2bcc3bebf348d33d11059f80e1682df5d2f14ea5ff085d4e8599bd27"`
Dec 17 18:06:45.638 INFO [stderr]    Compiling gcc v0.3.46
Dec 17 18:06:45.640 INFO [stderr]     Checking serde v1.0.4
Dec 17 18:06:45.640 INFO [stderr]     Checking quick-error v1.2.0
Dec 17 18:06:45.649 INFO [stderr]     Checking thread-id v3.1.0
Dec 17 18:06:45.649 INFO [stderr]     Checking memchr v1.0.1
Dec 17 18:06:45.649 INFO [stderr]     Checking ordered-float v0.4.0
Dec 17 18:06:45.649 INFO [stderr]    Compiling serde_derive_internals v0.15.0
Dec 17 18:06:45.649 INFO [stderr]     Checking chrono v0.3.1
Dec 17 18:06:46.720 INFO [stderr]     Checking thread_local v0.3.3
Dec 17 18:06:46.882 INFO [stderr]     Checking humantime v1.0.0
Dec 17 18:06:47.154 INFO [stderr]     Checking aho-corasick v0.6.3
Dec 17 18:06:50.154 INFO [stderr]     Checking regex v0.2.1
Dec 17 18:06:56.128 INFO [stderr]    Compiling miniz-sys v0.1.9
Dec 17 18:06:56.500 INFO [stderr]    Compiling serde_derive v1.0.4
Dec 17 18:06:58.996 INFO [stderr]     Checking flate2 v0.2.19
Dec 17 18:07:07.261 INFO [stderr]     Checking serde_yaml v0.7.0
Dec 17 18:07:07.261 INFO [stderr]     Checking serde-value v0.5.0
Dec 17 18:07:07.261 INFO [stderr]     Checking serde_json v1.0.2
Dec 17 18:07:10.685 INFO [stderr]     Checking log4rs v0.7.0
Dec 17 18:07:12.832 INFO [stderr]     Checking slang v0.1.0 (/opt/crater/workdir)
Dec 17 18:07:14.696 INFO [stderr] warning: unused import: `assembler::lexer::Lexer`
Dec 17 18:07:14.696 INFO [stderr]   --> src/main.rs:23:5
Dec 17 18:07:14.696 INFO [stderr]    |
Dec 17 18:07:14.696 INFO [stderr] 23 | use assembler::lexer::Lexer;
Dec 17 18:07:14.696 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 18:07:14.696 INFO [stderr]    |
Dec 17 18:07:14.696 INFO [stderr]    = note: #[warn(unused_imports)] on by default
Dec 17 18:07:14.696 INFO [stderr] 
Dec 17 18:07:14.696 INFO [stderr] warning: unused imports: `Tokenizer`, `shunting_yard`
Dec 17 18:07:14.696 INFO [stderr]   --> src/main.rs:24:21
Dec 17 18:07:14.696 INFO [stderr]    |
Dec 17 18:07:14.696 INFO [stderr] 24 | use compiler::lex::{Tokenizer, shunting_yard};
Dec 17 18:07:14.696 INFO [stderr]    |                     ^^^^^^^^^  ^^^^^^^^^^^^^
Dec 17 18:07:14.696 INFO [stderr] 
Dec 17 18:07:14.732 INFO [stderr] warning: unused import: `assembler::lexer::Lexer`
Dec 17 18:07:14.732 INFO [stderr]   --> src/main.rs:23:5
Dec 17 18:07:14.732 INFO [stderr]    |
Dec 17 18:07:14.732 INFO [stderr] 23 | use assembler::lexer::Lexer;
Dec 17 18:07:14.732 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 18:07:14.732 INFO [stderr]    |
Dec 17 18:07:14.732 INFO [stderr]    = note: #[warn(unused_imports)] on by default
Dec 17 18:07:14.732 INFO [stderr] 
Dec 17 18:07:14.733 INFO [stderr] warning: unused imports: `Tokenizer`, `shunting_yard`
Dec 17 18:07:14.733 INFO [stderr]   --> src/main.rs:24:21
Dec 17 18:07:14.733 INFO [stderr]    |
Dec 17 18:07:14.733 INFO [stderr] 24 | use compiler::lex::{Tokenizer, shunting_yard};
Dec 17 18:07:14.733 INFO [stderr]    |                     ^^^^^^^^^  ^^^^^^^^^^^^^
Dec 17 18:07:14.733 INFO [stderr] 
Dec 17 18:07:15.020 INFO [stderr] warning: use of deprecated item 'core::str::<impl str>::trim_left_matches': superseded by `trim_start_matches`
Dec 17 18:07:15.020 INFO [stderr]   --> src/assembler/lexer.rs:72:30
Dec 17 18:07:15.020 INFO [stderr]    |
Dec 17 18:07:15.020 INFO [stderr] 72 |             let ret = string.trim_left_matches(';').trim_left();
Dec 17 18:07:15.020 INFO [stderr]    |                              ^^^^^^^^^^^^^^^^^
Dec 17 18:07:15.020 INFO [stderr]    |
Dec 17 18:07:15.020 INFO [stderr]    = note: #[warn(deprecated)] on by default
Dec 17 18:07:15.020 INFO [stderr] 
Dec 17 18:07:15.020 INFO [stderr] warning: use of deprecated item 'core::str::<impl str>::trim_left': superseded by `trim_start`
Dec 17 18:07:15.020 INFO [stderr]   --> src/assembler/lexer.rs:72:53
Dec 17 18:07:15.020 INFO [stderr]    |
Dec 17 18:07:15.020 INFO [stderr] 72 |             let ret = string.trim_left_matches(';').trim_left();
Dec 17 18:07:15.021 INFO [stderr]    |                                                     ^^^^^^^^^
Dec 17 18:07:15.021 INFO [stderr] 
Dec 17 18:07:15.088 INFO [stderr] warning: use of deprecated item 'core::str::<impl str>::trim_left_matches': superseded by `trim_start_matches`
Dec 17 18:07:15.088 INFO [stderr]   --> src/assembler/lexer.rs:72:30
Dec 17 18:07:15.088 INFO [stderr]    |
Dec 17 18:07:15.088 INFO [stderr] 72 |             let ret = string.trim_left_matches(';').trim_left();
Dec 17 18:07:15.088 INFO [stderr]    |                              ^^^^^^^^^^^^^^^^^
Dec 17 18:07:15.088 INFO [stderr]    |
Dec 17 18:07:15.088 INFO [stderr]    = note: #[warn(deprecated)] on by default
Dec 17 18:07:15.088 INFO [stderr] 
Dec 17 18:07:15.088 INFO [stderr] warning: use of deprecated item 'core::str::<impl str>::trim_left': superseded by `trim_start`
Dec 17 18:07:15.088 INFO [stderr]   --> src/assembler/lexer.rs:72:53
Dec 17 18:07:15.088 INFO [stderr]    |
Dec 17 18:07:15.088 INFO [stderr] 72 |             let ret = string.trim_left_matches(';').trim_left();
Dec 17 18:07:15.088 INFO [stderr]    |                                                     ^^^^^^^^^
Dec 17 18:07:15.088 INFO [stderr] 
Dec 17 18:07:15.212 INFO [stderr] warning: method is never used: `next_code`
Dec 17 18:07:15.215 INFO [stderr]   --> src/program.rs:28:5
Dec 17 18:07:15.215 INFO [stderr]    |
Dec 17 18:07:15.215 INFO [stderr] 28 |     pub fn next_code(&mut self) -> u16 {
Dec 17 18:07:15.215 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 18:07:15.215 INFO [stderr]    |
Dec 17 18:07:15.215 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 17 18:07:15.215 INFO [stderr] 
Dec 17 18:07:15.215 INFO [stderr] warning: method is never used: `reset`
Dec 17 18:07:15.215 INFO [stderr]   --> src/program.rs:41:5
Dec 17 18:07:15.215 INFO [stderr]    |
Dec 17 18:07:15.215 INFO [stderr] 41 |     pub fn reset(&mut self) {
Dec 17 18:07:15.215 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 18:07:15.215 INFO [stderr] 
Dec 17 18:07:15.215 INFO [stderr] warning: enum is never used: `Token`
Dec 17 18:07:15.215 INFO [stderr]  --> src/compiler/lex.rs:7:1
Dec 17 18:07:15.215 INFO [stderr]   |
Dec 17 18:07:15.215 INFO [stderr] 7 | pub enum Token {
Dec 17 18:07:15.215 INFO [stderr]   | ^^^^^^^^^^^^^^
Dec 17 18:07:15.215 INFO [stderr] 
Dec 17 18:07:15.215 INFO [stderr] warning: enum is never used: `ConsumeType`
Dec 17 18:07:15.215 INFO [stderr]   --> src/compiler/lex.rs:15:1
Dec 17 18:07:15.215 INFO [stderr]    |
Dec 17 18:07:15.215 INFO [stderr] 15 | enum ConsumeType { Ident, Number }
Dec 17 18:07:15.216 INFO [stderr]    | ^^^^^^^^^^^^^^^^
Dec 17 18:07:15.216 INFO [stderr] 
Dec 17 18:07:15.216 INFO [stderr] warning: struct is never constructed: `Tokenizer`
Dec 17 18:07:15.216 INFO [stderr]   --> src/compiler/lex.rs:17:1
Dec 17 18:07:15.216 INFO [stderr]    |
Dec 17 18:07:15.216 INFO [stderr] 17 | pub struct Tokenizer<'a> {
Dec 17 18:07:15.216 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 18:07:15.216 INFO [stderr] 
Dec 17 18:07:15.216 INFO [stderr] warning: method is never used: `new`
Dec 17 18:07:15.216 INFO [stderr]   --> src/compiler/lex.rs:21:5
Dec 17 18:07:15.216 INFO [stderr]    |
Dec 17 18:07:15.216 INFO [stderr] 21 |     pub fn new(input: &'a str) -> Self {
Dec 17 18:07:15.216 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 18:07:15.216 INFO [stderr] 
Dec 17 18:07:15.216 INFO [stderr] warning: method is never used: `tokenize`
Dec 17 18:07:15.216 INFO [stderr]   --> src/compiler/lex.rs:26:5
Dec 17 18:07:15.216 INFO [stderr]    |
Dec 17 18:07:15.216 INFO [stderr] 26 |     pub fn tokenize(&mut self) -> Vec<Token> {
Dec 17 18:07:15.216 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 18:07:15.216 INFO [stderr] 
Dec 17 18:07:15.216 INFO [stderr] warning: function is never used: `consume_ident`
Dec 17 18:07:15.216 INFO [stderr]   --> src/compiler/lex.rs:48:1
Dec 17 18:07:15.216 INFO [stderr]    |
Dec 17 18:07:15.216 INFO [stderr] 48 | fn consume_ident(peekable: &mut Peekable<Chars>) -> Token {
Dec 17 18:07:15.216 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 18:07:15.216 INFO [stderr] 
Dec 17 18:07:15.216 INFO [stderr] warning: function is never used: `consume_number`
Dec 17 18:07:15.216 INFO [stderr]   --> src/compiler/lex.rs:53:1
Dec 17 18:07:15.216 INFO [stderr]    |
Dec 17 18:07:15.216 INFO [stderr] 53 | fn consume_number(peekable: &mut Peekable<Chars>) -> Token {
Dec 17 18:07:15.216 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 18:07:15.216 INFO [stderr] 
Dec 17 18:07:15.216 INFO [stderr] warning: function is never used: `valid_token_char`
Dec 17 18:07:15.216 INFO [stderr]   --> src/compiler/lex.rs:58:1
Dec 17 18:07:15.216 INFO [stderr]    |
Dec 17 18:07:15.216 INFO [stderr] 58 | fn valid_token_char(ch: &char, tt: ConsumeType) -> bool {
Dec 17 18:07:15.216 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 18:07:15.216 INFO [stderr] 
Dec 17 18:07:15.216 INFO [stderr] warning: function is never used: `shunting_yard`
Dec 17 18:07:15.216 INFO [stderr]   --> src/compiler/lex.rs:71:1
Dec 17 18:07:15.216 INFO [stderr]    |
Dec 17 18:07:15.216 INFO [stderr] 71 | pub fn shunting_yard(tokens: Vec<Token>) -> Vec<Token> {
Dec 17 18:07:15.216 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 18:07:15.216 INFO [stderr] 
Dec 17 18:07:15.216 INFO [stderr] warning: field is never used: `current_line`
Dec 17 18:07:15.216 INFO [stderr]   --> src/assembler/mod.rs:12:5
Dec 17 18:07:15.216 INFO [stderr]    |
Dec 17 18:07:15.216 INFO [stderr] 12 |     current_line: usize,
Dec 17 18:07:15.216 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^
Dec 17 18:07:15.216 INFO [stderr] 
Dec 17 18:07:15.216 INFO [stderr] warning: field is never used: `errors`
Dec 17 18:07:15.216 INFO [stderr]   --> src/assembler/mod.rs:13:5
Dec 17 18:07:15.216 INFO [stderr]    |
Dec 17 18:07:15.216 INFO [stderr] 13 |     errors: Vec<String>,
Dec 17 18:07:15.216 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^
Dec 17 18:07:15.216 INFO [stderr] 
Dec 17 18:07:15.220 INFO [stderr] warning: unused return value of `std::iter::Iterator::collect` that must be used
Dec 17 18:07:15.220 INFO [stderr]   --> src/compiler/lex.rs:38:73
Dec 17 18:07:15.220 INFO [stderr]    |
Dec 17 18:07:15.220 INFO [stderr] 38 |                     ')'             => {tokens.push(Token::RightParen); chars.take(1).collect::<String>();},
Dec 17 18:07:15.220 INFO [stderr]    |                                                                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 18:07:15.220 INFO [stderr]    |
Dec 17 18:07:15.220 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 17 18:07:15.220 INFO [stderr]    = note: if you really need to exhaust the iterator, consider `.for_each(drop)` instead
Dec 17 18:07:15.220 INFO [stderr] 
Dec 17 18:07:15.220 INFO [stderr] warning: unused return value of `std::iter::Iterator::collect` that must be used
Dec 17 18:07:15.220 INFO [stderr]   --> src/compiler/lex.rs:39:72
Dec 17 18:07:15.220 INFO [stderr]    |
Dec 17 18:07:15.220 INFO [stderr] 39 |                     '('             => {tokens.push(Token::LeftParen); chars.take(1).collect::<String>();},
Dec 17 18:07:15.220 INFO [stderr]    |                                                                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 18:07:15.220 INFO [stderr]    |
Dec 17 18:07:15.221 INFO [stderr]    = note: if you really need to exhaust the iterator, consider `.for_each(drop)` instead
Dec 17 18:07:15.221 INFO [stderr] 
Dec 17 18:07:15.221 INFO [stderr] warning: unused return value of `std::iter::Iterator::collect` that must be used
Dec 17 18:07:15.221 INFO [stderr]   --> src/compiler/lex.rs:40:42
Dec 17 18:07:15.221 INFO [stderr]    |
Dec 17 18:07:15.221 INFO [stderr] 40 |                     ' '             => { chars.take(1).collect::<String>(); }
Dec 17 18:07:15.221 INFO [stderr]    |                                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 18:07:15.221 INFO [stderr]    |
Dec 17 18:07:15.221 INFO [stderr]    = note: if you really need to exhaust the iterator, consider `.for_each(drop)` instead
Dec 17 18:07:15.221 INFO [stderr] 
Dec 17 18:07:15.356 INFO [stderr] warning: enum is never used: `Token`
Dec 17 18:07:15.356 INFO [stderr]  --> src/compiler/lex.rs:7:1
Dec 17 18:07:15.356 INFO [stderr]   |
Dec 17 18:07:15.356 INFO [stderr] 7 | pub enum Token {
Dec 17 18:07:15.356 INFO [stderr]   | ^^^^^^^^^^^^^^
Dec 17 18:07:15.356 INFO [stderr]   |
Dec 17 18:07:15.356 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 17 18:07:15.356 INFO [stderr] 
Dec 17 18:07:15.356 INFO [stderr] warning: enum is never used: `ConsumeType`
Dec 17 18:07:15.356 INFO [stderr]   --> src/compiler/lex.rs:15:1
Dec 17 18:07:15.356 INFO [stderr]    |
Dec 17 18:07:15.356 INFO [stderr] 15 | enum ConsumeType { Ident, Number }
Dec 17 18:07:15.356 INFO [stderr]    | ^^^^^^^^^^^^^^^^
Dec 17 18:07:15.356 INFO [stderr] 
Dec 17 18:07:15.356 INFO [stderr] warning: struct is never constructed: `Tokenizer`
Dec 17 18:07:15.356 INFO [stderr]   --> src/compiler/lex.rs:17:1
Dec 17 18:07:15.356 INFO [stderr]    |
Dec 17 18:07:15.356 INFO [stderr] 17 | pub struct Tokenizer<'a> {
Dec 17 18:07:15.356 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 18:07:15.356 INFO [stderr] 
Dec 17 18:07:15.356 INFO [stderr] warning: method is never used: `new`
Dec 17 18:07:15.356 INFO [stderr]   --> src/compiler/lex.rs:21:5
Dec 17 18:07:15.356 INFO [stderr]    |
Dec 17 18:07:15.356 INFO [stderr] 21 |     pub fn new(input: &'a str) -> Self {
Dec 17 18:07:15.356 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 18:07:15.356 INFO [stderr] 
Dec 17 18:07:15.356 INFO [stderr] warning: method is never used: `tokenize`
Dec 17 18:07:15.356 INFO [stderr]   --> src/compiler/lex.rs:26:5
Dec 17 18:07:15.356 INFO [stderr]    |
Dec 17 18:07:15.356 INFO [stderr] 26 |     pub fn tokenize(&mut self) -> Vec<Token> {
Dec 17 18:07:15.356 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 18:07:15.356 INFO [stderr] 
Dec 17 18:07:15.356 INFO [stderr] warning: function is never used: `consume_ident`
Dec 17 18:07:15.356 INFO [stderr]   --> src/compiler/lex.rs:48:1
Dec 17 18:07:15.356 INFO [stderr]    |
Dec 17 18:07:15.356 INFO [stderr] 48 | fn consume_ident(peekable: &mut Peekable<Chars>) -> Token {
Dec 17 18:07:15.356 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 18:07:15.356 INFO [stderr] 
Dec 17 18:07:15.356 INFO [stderr] warning: function is never used: `consume_number`
Dec 17 18:07:15.356 INFO [stderr]   --> src/compiler/lex.rs:53:1
Dec 17 18:07:15.356 INFO [stderr]    |
Dec 17 18:07:15.356 INFO [stderr] 53 | fn consume_number(peekable: &mut Peekable<Chars>) -> Token {
Dec 17 18:07:15.356 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 18:07:15.356 INFO [stderr] 
Dec 17 18:07:15.356 INFO [stderr] warning: function is never used: `valid_token_char`
Dec 17 18:07:15.356 INFO [stderr]   --> src/compiler/lex.rs:58:1
Dec 17 18:07:15.356 INFO [stderr]    |
Dec 17 18:07:15.356 INFO [stderr] 58 | fn valid_token_char(ch: &char, tt: ConsumeType) -> bool {
Dec 17 18:07:15.356 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 18:07:15.356 INFO [stderr] 
Dec 17 18:07:15.356 INFO [stderr] warning: function is never used: `shunting_yard`
Dec 17 18:07:15.356 INFO [stderr]   --> src/compiler/lex.rs:71:1
Dec 17 18:07:15.356 INFO [stderr]    |
Dec 17 18:07:15.356 INFO [stderr] 71 | pub fn shunting_yard(tokens: Vec<Token>) -> Vec<Token> {
Dec 17 18:07:15.356 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 18:07:15.356 INFO [stderr] 
Dec 17 18:07:15.362 INFO [stderr] warning: unused return value of `std::iter::Iterator::collect` that must be used
Dec 17 18:07:15.362 INFO [stderr]   --> src/compiler/lex.rs:38:73
Dec 17 18:07:15.362 INFO [stderr]    |
Dec 17 18:07:15.362 INFO [stderr] 38 |                     ')'             => {tokens.push(Token::RightParen); chars.take(1).collect::<String>();},
Dec 17 18:07:15.362 INFO [stderr]    |                                                                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 18:07:15.362 INFO [stderr]    |
Dec 17 18:07:15.362 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 17 18:07:15.362 INFO [stderr]    = note: if you really need to exhaust the iterator, consider `.for_each(drop)` instead
Dec 17 18:07:15.362 INFO [stderr] 
Dec 17 18:07:15.362 INFO [stderr] warning: unused return value of `std::iter::Iterator::collect` that must be used
Dec 17 18:07:15.362 INFO [stderr]   --> src/compiler/lex.rs:39:72
Dec 17 18:07:15.362 INFO [stderr]    |
Dec 17 18:07:15.362 INFO [stderr] 39 |                     '('             => {tokens.push(Token::LeftParen); chars.take(1).collect::<String>();},
Dec 17 18:07:15.362 INFO [stderr]    |                                                                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 18:07:15.362 INFO [stderr]    |
Dec 17 18:07:15.362 INFO [stderr]    = note: if you really need to exhaust the iterator, consider `.for_each(drop)` instead
Dec 17 18:07:15.362 INFO [stderr] 
Dec 17 18:07:15.362 INFO [stderr] warning: unused return value of `std::iter::Iterator::collect` that must be used
Dec 17 18:07:15.362 INFO [stderr]   --> src/compiler/lex.rs:40:42
Dec 17 18:07:15.362 INFO [stderr]    |
Dec 17 18:07:15.362 INFO [stderr] 40 |                     ' '             => { chars.take(1).collect::<String>(); }
Dec 17 18:07:15.362 INFO [stderr]    |                                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 18:07:15.362 INFO [stderr]    |
Dec 17 18:07:15.362 INFO [stderr]    = note: if you really need to exhaust the iterator, consider `.for_each(drop)` instead
Dec 17 18:07:15.362 INFO [stderr] 
Dec 17 18:07:15.424 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 29.96s
Dec 17 18:07:16.414 INFO running `"docker" "inspect" "883c159e2bcc3bebf348d33d11059f80e1682df5d2f14ea5ff085d4e8599bd27"`
Dec 17 18:07:16.834 INFO running `"docker" "rm" "-f" "883c159e2bcc3bebf348d33d11059f80e1682df5d2f14ea5ff085d4e8599bd27"`
Dec 17 18:07:17.123 INFO [stdout] 883c159e2bcc3bebf348d33d11059f80e1682df5d2f14ea5ff085d4e8599bd27