Dec 17 15:32:49.425 INFO checking shhr1214/monkey-rust against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 17 15:32:49.426 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-3/master#96d1334e567237b1507cd277938e7ae2de75ff51:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/master#96d1334e567237b1507cd277938e7ae2de75ff51/gh/shhr1214/monkey-rust:/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 15:32:49.868 INFO [stdout] a9e562247ba784d2212efdad7bfb44da45812767940c0d82a89c1fb9dafe537e
Dec 17 15:32:49.870 INFO running `"docker" "start" "-a" "a9e562247ba784d2212efdad7bfb44da45812767940c0d82a89c1fb9dafe537e"`
Dec 17 15:32:51.576 INFO [stderr]     Checking monkey-rust v0.1.0 (/opt/crater/workdir)
Dec 17 15:32:51.772 INFO [stderr] warning: unused import: `token::Token`
Dec 17 15:32:51.772 INFO [stderr]  --> src/ast.rs:2:5
Dec 17 15:32:51.772 INFO [stderr]   |
Dec 17 15:32:51.772 INFO [stderr] 2 | use token::Token;
Dec 17 15:32:51.773 INFO [stderr]   |     ^^^^^^^^^^^^
Dec 17 15:32:51.773 INFO [stderr]   |
Dec 17 15:32:51.773 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 17 15:32:51.773 INFO [stderr] 
Dec 17 15:32:51.773 INFO [stderr] warning: unused import: `Node`
Dec 17 15:32:51.773 INFO [stderr]  --> src/parser.rs:1:11
Dec 17 15:32:51.773 INFO [stderr]   |
Dec 17 15:32:51.773 INFO [stderr] 1 | use ast::{Node, Program, Statement};
Dec 17 15:32:51.773 INFO [stderr]   |           ^^^^
Dec 17 15:32:51.773 INFO [stderr] 
Dec 17 15:32:51.773 INFO [stderr] warning: unused import: `Result`
Dec 17 15:32:51.773 INFO [stderr]  --> src/repl.rs:1:41
Dec 17 15:32:51.773 INFO [stderr]   |
Dec 17 15:32:51.773 INFO [stderr] 1 | use std::io::{BufRead, BufReader, Read, Result, Write};
Dec 17 15:32:51.773 INFO [stderr]   |                                         ^^^^^^
Dec 17 15:32:51.773 INFO [stderr] 
Dec 17 15:32:51.773 INFO [stderr] warning: unused import: `token::Token`
Dec 17 15:32:51.773 INFO [stderr]  --> src/ast.rs:2:5
Dec 17 15:32:51.773 INFO [stderr]   |
Dec 17 15:32:51.773 INFO [stderr] 2 | use token::Token;
Dec 17 15:32:51.773 INFO [stderr]   |     ^^^^^^^^^^^^
Dec 17 15:32:51.773 INFO [stderr]   |
Dec 17 15:32:51.773 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 17 15:32:51.773 INFO [stderr] 
Dec 17 15:32:51.773 INFO [stderr] warning: unused imports: `Node`, `Statement`
Dec 17 15:32:51.773 INFO [stderr]  --> src/parser.rs:1:11
Dec 17 15:32:51.773 INFO [stderr]   |
Dec 17 15:32:51.773 INFO [stderr] 1 | use ast::{Node, Program, Statement};
Dec 17 15:32:51.773 INFO [stderr]   |           ^^^^           ^^^^^^^^^
Dec 17 15:32:51.773 INFO [stderr] 
Dec 17 15:32:51.773 INFO [stderr] warning: unused import: `token`
Dec 17 15:32:51.773 INFO [stderr]  --> src/parser.rs:3:5
Dec 17 15:32:51.773 INFO [stderr]   |
Dec 17 15:32:51.773 INFO [stderr] 3 | use token;
Dec 17 15:32:51.773 INFO [stderr]   |     ^^^^^
Dec 17 15:32:51.773 INFO [stderr] 
Dec 17 15:32:51.773 INFO [stderr] warning: unused import: `Result`
Dec 17 15:32:51.773 INFO [stderr]  --> src/repl.rs:1:41
Dec 17 15:32:51.773 INFO [stderr]   |
Dec 17 15:32:51.773 INFO [stderr] 1 | use std::io::{BufRead, BufReader, Read, Result, Write};
Dec 17 15:32:51.773 INFO [stderr]   |                                         ^^^^^^
Dec 17 15:32:51.773 INFO [stderr] 
Dec 17 15:32:51.868 INFO [stderr] warning: unused variable: `e`
Dec 17 15:32:51.868 INFO [stderr]   --> src/parser.rs:65:40
Dec 17 15:32:51.868 INFO [stderr]    |
Dec 17 15:32:51.868 INFO [stderr] 65 |             Statement::LetStatement(i, e) => {
Dec 17 15:32:51.868 INFO [stderr]    |                                        ^ help: consider using `_e` instead
Dec 17 15:32:51.868 INFO [stderr]    |
Dec 17 15:32:51.868 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 17 15:32:51.868 INFO [stderr] 
Dec 17 15:32:51.916 INFO [stderr] warning: variant is never constructed: `LetStatement`
Dec 17 15:32:51.916 INFO [stderr]  --> src/ast.rs:9:5
Dec 17 15:32:51.916 INFO [stderr]   |
Dec 17 15:32:51.916 INFO [stderr] 9 |     LetStatement(Identifier, Expression),
Dec 17 15:32:51.916 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 15:32:51.916 INFO [stderr]   |
Dec 17 15:32:51.916 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 17 15:32:51.916 INFO [stderr] 
Dec 17 15:32:51.916 INFO [stderr] warning: variant is never constructed: `ExpressionStatement`
Dec 17 15:32:51.916 INFO [stderr]   --> src/ast.rs:10:5
Dec 17 15:32:51.916 INFO [stderr]    |
Dec 17 15:32:51.916 INFO [stderr] 10 |     ExpressionStatement(Expression),
Dec 17 15:32:51.916 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 15:32:51.916 INFO [stderr] 
Dec 17 15:32:51.916 INFO [stderr] warning: field is never used: `lexer`
Dec 17 15:32:51.916 INFO [stderr]  --> src/parser.rs:7:5
Dec 17 15:32:51.916 INFO [stderr]   |
Dec 17 15:32:51.916 INFO [stderr] 7 |     lexer: Lexer,
Dec 17 15:32:51.916 INFO [stderr]   |     ^^^^^^^^^^^^
Dec 17 15:32:51.916 INFO [stderr] 
Dec 17 15:32:51.917 INFO [stderr] warning: field is never used: `cur_token`
Dec 17 15:32:51.917 INFO [stderr]  --> src/parser.rs:8:5
Dec 17 15:32:51.917 INFO [stderr]   |
Dec 17 15:32:51.917 INFO [stderr] 8 |     cur_token: Token,
Dec 17 15:32:51.917 INFO [stderr]   |     ^^^^^^^^^^^^^^^^
Dec 17 15:32:51.917 INFO [stderr] 
Dec 17 15:32:51.917 INFO [stderr] warning: field is never used: `peek_token`
Dec 17 15:32:51.917 INFO [stderr]  --> src/parser.rs:9:5
Dec 17 15:32:51.917 INFO [stderr]   |
Dec 17 15:32:51.917 INFO [stderr] 9 |     peek_token: Token,
Dec 17 15:32:51.917 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^
Dec 17 15:32:51.917 INFO [stderr] 
Dec 17 15:32:51.924 INFO [stderr] warning: method is never used: `next_token`
Dec 17 15:32:51.924 INFO [stderr]   --> src/parser.rs:23:5
Dec 17 15:32:51.924 INFO [stderr]    |
Dec 17 15:32:51.924 INFO [stderr] 23 |     fn next_token(mut self) {
Dec 17 15:32:51.924 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 15:32:51.924 INFO [stderr] 
Dec 17 15:32:51.945 INFO [stderr] warning: enum is never used: `Statement`
Dec 17 15:32:51.945 INFO [stderr]  --> src/ast.rs:8:1
Dec 17 15:32:51.945 INFO [stderr]   |
Dec 17 15:32:51.945 INFO [stderr] 8 | pub enum Statement {
Dec 17 15:32:51.945 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^
Dec 17 15:32:51.945 INFO [stderr]   |
Dec 17 15:32:51.945 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 17 15:32:51.945 INFO [stderr] 
Dec 17 15:32:51.945 INFO [stderr] warning: struct is never constructed: `Expression`
Dec 17 15:32:51.945 INFO [stderr]   --> src/ast.rs:22:1
Dec 17 15:32:51.945 INFO [stderr]    |
Dec 17 15:32:51.945 INFO [stderr] 22 | pub struct Expression {}
Dec 17 15:32:51.945 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^
Dec 17 15:32:51.945 INFO [stderr] 
Dec 17 15:32:51.945 INFO [stderr] warning: struct is never constructed: `Program`
Dec 17 15:32:51.945 INFO [stderr]   --> src/ast.rs:24:1
Dec 17 15:32:51.945 INFO [stderr]    |
Dec 17 15:32:51.945 INFO [stderr] 24 | pub struct Program {
Dec 17 15:32:51.945 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^
Dec 17 15:32:51.945 INFO [stderr] 
Dec 17 15:32:51.945 INFO [stderr] warning: method is never used: `new`
Dec 17 15:32:51.945 INFO [stderr]   --> src/ast.rs:29:5
Dec 17 15:32:51.945 INFO [stderr]    |
Dec 17 15:32:51.945 INFO [stderr] 29 |     pub fn new() -> Program {
Dec 17 15:32:51.945 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 15:32:51.945 INFO [stderr] 
Dec 17 15:32:51.945 INFO [stderr] warning: method is never used: `statements`
Dec 17 15:32:51.945 INFO [stderr]   --> src/ast.rs:35:5
Dec 17 15:32:51.945 INFO [stderr]    |
Dec 17 15:32:51.945 INFO [stderr] 35 |     pub fn statements(self) -> Vec<Statement> {
Dec 17 15:32:51.945 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 15:32:51.945 INFO [stderr] 
Dec 17 15:32:51.945 INFO [stderr] warning: struct is never constructed: `Identifier`
Dec 17 15:32:51.945 INFO [stderr]   --> src/ast.rs:53:1
Dec 17 15:32:51.945 INFO [stderr]    |
Dec 17 15:32:51.945 INFO [stderr] 53 | pub struct Identifier(pub String);
Dec 17 15:32:51.945 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 15:32:51.945 INFO [stderr] 
Dec 17 15:32:51.945 INFO [stderr] warning: struct is never constructed: `Parser`
Dec 17 15:32:51.945 INFO [stderr]  --> src/parser.rs:6:1
Dec 17 15:32:51.945 INFO [stderr]   |
Dec 17 15:32:51.945 INFO [stderr] 6 | struct Parser {
Dec 17 15:32:51.945 INFO [stderr]   | ^^^^^^^^^^^^^
Dec 17 15:32:51.945 INFO [stderr] 
Dec 17 15:32:51.945 INFO [stderr] warning: method is never used: `new`
Dec 17 15:32:51.945 INFO [stderr]   --> src/parser.rs:13:5
Dec 17 15:32:51.945 INFO [stderr]    |
Dec 17 15:32:51.945 INFO [stderr] 13 |     pub fn new(mut lexer: Lexer) -> Parser {
Dec 17 15:32:51.945 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 15:32:51.945 INFO [stderr] 
Dec 17 15:32:51.945 INFO [stderr] warning: method is never used: `next_token`
Dec 17 15:32:51.945 INFO [stderr]   --> src/parser.rs:23:5
Dec 17 15:32:51.945 INFO [stderr]    |
Dec 17 15:32:51.945 INFO [stderr] 23 |     fn next_token(mut self) {
Dec 17 15:32:51.945 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 15:32:51.945 INFO [stderr] 
Dec 17 15:32:51.945 INFO [stderr] warning: method is never used: `parse_program`
Dec 17 15:32:51.945 INFO [stderr]   --> src/parser.rs:28:5
Dec 17 15:32:51.945 INFO [stderr]    |
Dec 17 15:32:51.945 INFO [stderr] 28 |     fn parse_program(&self) -> Program {
Dec 17 15:32:51.945 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 15:32:51.945 INFO [stderr] 
Dec 17 15:32:51.945 INFO [stderr] warning: method is never used: `literal`
Dec 17 15:32:51.945 INFO [stderr]   --> src/token.rs:60:5
Dec 17 15:32:51.945 INFO [stderr]    |
Dec 17 15:32:51.945 INFO [stderr] 60 |     pub fn literal(&self) -> String {
Dec 17 15:32:51.945 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 15:32:51.945 INFO [stderr] 
Dec 17 15:32:51.945 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 15:32:51.945 INFO [stderr]   --> src/repl.rs:10:5
Dec 17 15:32:51.945 INFO [stderr]    |
Dec 17 15:32:51.945 INFO [stderr] 10 |     output.write(PROMPT.as_bytes());
Dec 17 15:32:51.945 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 15:32:51.945 INFO [stderr]    |
Dec 17 15:32:51.946 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 17 15:32:51.946 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 15:32:51.946 INFO [stderr] 
Dec 17 15:32:51.946 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 15:32:51.946 INFO [stderr]   --> src/repl.rs:11:5
Dec 17 15:32:51.946 INFO [stderr]    |
Dec 17 15:32:51.946 INFO [stderr] 11 |     output.flush();
Dec 17 15:32:51.946 INFO [stderr]    |     ^^^^^^^^^^^^^^^
Dec 17 15:32:51.946 INFO [stderr]    |
Dec 17 15:32:51.946 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 15:32:51.946 INFO [stderr] 
Dec 17 15:32:51.946 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 15:32:51.946 INFO [stderr]   --> src/repl.rs:20:13
Dec 17 15:32:51.946 INFO [stderr]    |
Dec 17 15:32:51.946 INFO [stderr] 20 |             output.write(token.display().as_bytes());
Dec 17 15:32:51.946 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 15:32:51.946 INFO [stderr]    |
Dec 17 15:32:51.946 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 15:32:51.946 INFO [stderr] 
Dec 17 15:32:51.946 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 15:32:51.946 INFO [stderr]   --> src/repl.rs:21:13
Dec 17 15:32:51.946 INFO [stderr]    |
Dec 17 15:32:51.946 INFO [stderr] 21 |             output.write("\n".as_bytes());
Dec 17 15:32:51.946 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 15:32:51.946 INFO [stderr]    |
Dec 17 15:32:51.946 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 15:32:51.946 INFO [stderr] 
Dec 17 15:32:51.946 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 15:32:51.946 INFO [stderr]   --> src/repl.rs:22:13
Dec 17 15:32:51.946 INFO [stderr]    |
Dec 17 15:32:51.946 INFO [stderr] 22 |             output.flush();
Dec 17 15:32:51.946 INFO [stderr]    |             ^^^^^^^^^^^^^^^
Dec 17 15:32:51.946 INFO [stderr]    |
Dec 17 15:32:51.946 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 15:32:51.946 INFO [stderr] 
Dec 17 15:32:51.946 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 15:32:51.946 INFO [stderr]   --> src/repl.rs:24:9
Dec 17 15:32:51.946 INFO [stderr]    |
Dec 17 15:32:51.946 INFO [stderr] 24 |         output.write(PROMPT.as_bytes());
Dec 17 15:32:51.946 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 15:32:51.946 INFO [stderr]    |
Dec 17 15:32:51.946 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 15:32:51.946 INFO [stderr] 
Dec 17 15:32:51.946 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 15:32:51.946 INFO [stderr]   --> src/repl.rs:25:9
Dec 17 15:32:51.946 INFO [stderr]    |
Dec 17 15:32:51.946 INFO [stderr] 25 |         output.flush();
Dec 17 15:32:51.946 INFO [stderr]    |         ^^^^^^^^^^^^^^^
Dec 17 15:32:51.946 INFO [stderr]    |
Dec 17 15:32:51.946 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 15:32:51.946 INFO [stderr] 
Dec 17 15:32:51.972 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 15:32:51.976 INFO [stderr]   --> src/repl.rs:10:5
Dec 17 15:32:51.976 INFO [stderr]    |
Dec 17 15:32:51.976 INFO [stderr] 10 |     output.write(PROMPT.as_bytes());
Dec 17 15:32:51.976 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 15:32:51.976 INFO [stderr]    |
Dec 17 15:32:51.976 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 17 15:32:51.976 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 15:32:51.976 INFO [stderr] 
Dec 17 15:32:51.976 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 15:32:51.976 INFO [stderr]   --> src/repl.rs:11:5
Dec 17 15:32:51.976 INFO [stderr]    |
Dec 17 15:32:51.976 INFO [stderr] 11 |     output.flush();
Dec 17 15:32:51.976 INFO [stderr]    |     ^^^^^^^^^^^^^^^
Dec 17 15:32:51.976 INFO [stderr]    |
Dec 17 15:32:51.976 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 15:32:51.976 INFO [stderr] 
Dec 17 15:32:51.976 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 15:32:51.976 INFO [stderr]   --> src/repl.rs:20:13
Dec 17 15:32:51.976 INFO [stderr]    |
Dec 17 15:32:51.976 INFO [stderr] 20 |             output.write(token.display().as_bytes());
Dec 17 15:32:51.976 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 15:32:51.976 INFO [stderr]    |
Dec 17 15:32:51.976 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 15:32:51.976 INFO [stderr] 
Dec 17 15:32:51.976 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 15:32:51.976 INFO [stderr]   --> src/repl.rs:21:13
Dec 17 15:32:51.976 INFO [stderr]    |
Dec 17 15:32:51.976 INFO [stderr] 21 |             output.write("\n".as_bytes());
Dec 17 15:32:51.976 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 15:32:51.976 INFO [stderr]    |
Dec 17 15:32:51.976 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 15:32:51.976 INFO [stderr] 
Dec 17 15:32:51.976 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 15:32:51.976 INFO [stderr]   --> src/repl.rs:22:13
Dec 17 15:32:51.976 INFO [stderr]    |
Dec 17 15:32:51.976 INFO [stderr] 22 |             output.flush();
Dec 17 15:32:51.976 INFO [stderr]    |             ^^^^^^^^^^^^^^^
Dec 17 15:32:51.976 INFO [stderr]    |
Dec 17 15:32:51.976 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 15:32:51.976 INFO [stderr] 
Dec 17 15:32:51.976 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 15:32:51.976 INFO [stderr]   --> src/repl.rs:24:9
Dec 17 15:32:51.976 INFO [stderr]    |
Dec 17 15:32:51.976 INFO [stderr] 24 |         output.write(PROMPT.as_bytes());
Dec 17 15:32:51.977 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 15:32:51.977 INFO [stderr]    |
Dec 17 15:32:51.977 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 15:32:51.977 INFO [stderr] 
Dec 17 15:32:51.977 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 15:32:51.977 INFO [stderr]   --> src/repl.rs:25:9
Dec 17 15:32:51.977 INFO [stderr]    |
Dec 17 15:32:51.977 INFO [stderr] 25 |         output.flush();
Dec 17 15:32:51.977 INFO [stderr]    |         ^^^^^^^^^^^^^^^
Dec 17 15:32:51.977 INFO [stderr]    |
Dec 17 15:32:51.977 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 15:32:51.977 INFO [stderr] 
Dec 17 15:32:52.010 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.53s
Dec 17 15:32:52.690 INFO running `"docker" "inspect" "a9e562247ba784d2212efdad7bfb44da45812767940c0d82a89c1fb9dafe537e"`
Dec 17 15:32:52.912 INFO running `"docker" "rm" "-f" "a9e562247ba784d2212efdad7bfb44da45812767940c0d82a89c1fb9dafe537e"`
Dec 17 15:32:53.236 INFO [stdout] a9e562247ba784d2212efdad7bfb44da45812767940c0d82a89c1fb9dafe537e