Nov 27 20:34:01.886 INFO checking shhr1214/monkey-rust against try#db42d4dad33013eba11ef37342ad9f614e5652b8 for pr-56074
Nov 27 20:34:01.886 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56074/worker-7/try#db42d4dad33013eba11ef37342ad9f614e5652b8:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-7/pr-56074/try#db42d4dad33013eba11ef37342ad9f614e5652b8:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +db42d4dad33013eba11ef37342ad9f614e5652b8-alt check --frozen --all --all-targets" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Nov 27 20:34:02.025 INFO [stdout] ab0a174425c855838337bfa79548e32c12fc443f747c1569451e20a54d4c0ffb
Nov 27 20:34:02.027 INFO running `"docker" "start" "-a" "ab0a174425c855838337bfa79548e32c12fc443f747c1569451e20a54d4c0ffb"`
Nov 27 20:34:02.310 INFO [stderr] usermod: no changes
Nov 27 20:34:02.336 INFO [stderr]     Checking monkey-rust v0.1.0 (/source)
Nov 27 20:34:02.477 INFO [stderr] warning: unused import: `token::Token`
Nov 27 20:34:02.477 INFO [stderr]  --> src/ast.rs:2:5
Nov 27 20:34:02.477 INFO [stderr]   |
Nov 27 20:34:02.477 INFO [stderr] 2 | use token::Token;
Nov 27 20:34:02.477 INFO [stderr]   |     ^^^^^^^^^^^^
Nov 27 20:34:02.477 INFO [stderr]   |
Nov 27 20:34:02.477 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Nov 27 20:34:02.477 INFO [stderr] 
Nov 27 20:34:02.477 INFO [stderr] warning: unused imports: `Node`, `Statement`
Nov 27 20:34:02.477 INFO [stderr]  --> src/parser.rs:1:11
Nov 27 20:34:02.477 INFO [stderr]   |
Nov 27 20:34:02.477 INFO [stderr] 1 | use ast::{Node, Program, Statement};
Nov 27 20:34:02.477 INFO [stderr]   |           ^^^^           ^^^^^^^^^
Nov 27 20:34:02.477 INFO [stderr] 
Nov 27 20:34:02.477 INFO [stderr] warning: unused import: `token`
Nov 27 20:34:02.477 INFO [stderr]  --> src/parser.rs:3:5
Nov 27 20:34:02.477 INFO [stderr]   |
Nov 27 20:34:02.477 INFO [stderr] 3 | use token;
Nov 27 20:34:02.477 INFO [stderr]   |     ^^^^^
Nov 27 20:34:02.477 INFO [stderr] 
Nov 27 20:34:02.477 INFO [stderr] warning: unused import: `Result`
Nov 27 20:34:02.477 INFO [stderr]  --> src/repl.rs:1:41
Nov 27 20:34:02.477 INFO [stderr]   |
Nov 27 20:34:02.477 INFO [stderr] 1 | use std::io::{BufRead, BufReader, Read, Result, Write};
Nov 27 20:34:02.477 INFO [stderr]   |                                         ^^^^^^
Nov 27 20:34:02.477 INFO [stderr] 
Nov 27 20:34:02.508 INFO [stderr] warning: unused import: `token::Token`
Nov 27 20:34:02.508 INFO [stderr]  --> src/ast.rs:2:5
Nov 27 20:34:02.509 INFO [stderr]   |
Nov 27 20:34:02.509 INFO [stderr] 2 | use token::Token;
Nov 27 20:34:02.509 INFO [stderr]   |     ^^^^^^^^^^^^
Nov 27 20:34:02.509 INFO [stderr]   |
Nov 27 20:34:02.509 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Nov 27 20:34:02.509 INFO [stderr] 
Nov 27 20:34:02.509 INFO [stderr] warning: unused import: `Node`
Nov 27 20:34:02.509 INFO [stderr]  --> src/parser.rs:1:11
Nov 27 20:34:02.509 INFO [stderr]   |
Nov 27 20:34:02.509 INFO [stderr] 1 | use ast::{Node, Program, Statement};
Nov 27 20:34:02.509 INFO [stderr]   |           ^^^^
Nov 27 20:34:02.509 INFO [stderr] 
Nov 27 20:34:02.509 INFO [stderr] warning: unused import: `Result`
Nov 27 20:34:02.509 INFO [stderr]  --> src/repl.rs:1:41
Nov 27 20:34:02.509 INFO [stderr]   |
Nov 27 20:34:02.509 INFO [stderr] 1 | use std::io::{BufRead, BufReader, Read, Result, Write};
Nov 27 20:34:02.509 INFO [stderr]   |                                         ^^^^^^
Nov 27 20:34:02.509 INFO [stderr] 
Nov 27 20:34:02.555 INFO [stderr] warning: enum is never used: `Statement`
Nov 27 20:34:02.556 INFO [stderr]  --> src/ast.rs:8:1
Nov 27 20:34:02.556 INFO [stderr]   |
Nov 27 20:34:02.556 INFO [stderr] 8 | pub enum Statement {
Nov 27 20:34:02.556 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^
Nov 27 20:34:02.556 INFO [stderr]   |
Nov 27 20:34:02.556 INFO [stderr]   = note: #[warn(dead_code)] on by default
Nov 27 20:34:02.556 INFO [stderr] 
Nov 27 20:34:02.556 INFO [stderr] warning: struct is never constructed: `Expression`
Nov 27 20:34:02.556 INFO [stderr]   --> src/ast.rs:22:1
Nov 27 20:34:02.556 INFO [stderr]    |
Nov 27 20:34:02.556 INFO [stderr] 22 | pub struct Expression {}
Nov 27 20:34:02.556 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^
Nov 27 20:34:02.556 INFO [stderr] 
Nov 27 20:34:02.556 INFO [stderr] warning: struct is never constructed: `Program`
Nov 27 20:34:02.556 INFO [stderr]   --> src/ast.rs:24:1
Nov 27 20:34:02.556 INFO [stderr]    |
Nov 27 20:34:02.556 INFO [stderr] 24 | pub struct Program {
Nov 27 20:34:02.556 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^
Nov 27 20:34:02.556 INFO [stderr] 
Nov 27 20:34:02.556 INFO [stderr] warning: method is never used: `new`
Nov 27 20:34:02.556 INFO [stderr]   --> src/ast.rs:29:5
Nov 27 20:34:02.556 INFO [stderr]    |
Nov 27 20:34:02.556 INFO [stderr] 29 |     pub fn new() -> Program {
Nov 27 20:34:02.556 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
Nov 27 20:34:02.556 INFO [stderr] 
Nov 27 20:34:02.556 INFO [stderr] warning: method is never used: `statements`
Nov 27 20:34:02.556 INFO [stderr]   --> src/ast.rs:35:5
Nov 27 20:34:02.556 INFO [stderr]    |
Nov 27 20:34:02.556 INFO [stderr] 35 |     pub fn statements(self) -> Vec<Statement> {
Nov 27 20:34:02.556 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 27 20:34:02.556 INFO [stderr] 
Nov 27 20:34:02.556 INFO [stderr] warning: struct is never constructed: `Identifier`
Nov 27 20:34:02.556 INFO [stderr]   --> src/ast.rs:53:1
Nov 27 20:34:02.556 INFO [stderr]    |
Nov 27 20:34:02.556 INFO [stderr] 53 | pub struct Identifier(pub String);
Nov 27 20:34:02.556 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 27 20:34:02.556 INFO [stderr] 
Nov 27 20:34:02.556 INFO [stderr] warning: struct is never constructed: `Parser`
Nov 27 20:34:02.556 INFO [stderr]  --> src/parser.rs:6:1
Nov 27 20:34:02.556 INFO [stderr]   |
Nov 27 20:34:02.556 INFO [stderr] 6 | struct Parser {
Nov 27 20:34:02.557 INFO [stderr]   | ^^^^^^^^^^^^^
Nov 27 20:34:02.557 INFO [stderr] 
Nov 27 20:34:02.557 INFO [stderr] warning: method is never used: `new`
Nov 27 20:34:02.557 INFO [stderr]   --> src/parser.rs:13:5
Nov 27 20:34:02.557 INFO [stderr]    |
Nov 27 20:34:02.557 INFO [stderr] 13 |     pub fn new(mut lexer: Lexer) -> Parser {
Nov 27 20:34:02.557 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 27 20:34:02.557 INFO [stderr] 
Nov 27 20:34:02.557 INFO [stderr] warning: method is never used: `next_token`
Nov 27 20:34:02.557 INFO [stderr]   --> src/parser.rs:23:5
Nov 27 20:34:02.557 INFO [stderr]    |
Nov 27 20:34:02.557 INFO [stderr] 23 |     fn next_token(mut self) {
Nov 27 20:34:02.557 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
Nov 27 20:34:02.557 INFO [stderr] 
Nov 27 20:34:02.557 INFO [stderr] warning: method is never used: `parse_program`
Nov 27 20:34:02.557 INFO [stderr]   --> src/parser.rs:28:5
Nov 27 20:34:02.557 INFO [stderr]    |
Nov 27 20:34:02.557 INFO [stderr] 28 |     fn parse_program(&self) -> Program {
Nov 27 20:34:02.557 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 27 20:34:02.557 INFO [stderr] 
Nov 27 20:34:02.557 INFO [stderr] warning: method is never used: `literal`
Nov 27 20:34:02.557 INFO [stderr]   --> src/token.rs:60:5
Nov 27 20:34:02.557 INFO [stderr]    |
Nov 27 20:34:02.557 INFO [stderr] 60 |     pub fn literal(&self) -> String {
Nov 27 20:34:02.557 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 27 20:34:02.557 INFO [stderr] 
Nov 27 20:34:02.563 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 27 20:34:02.563 INFO [stderr]   --> src/repl.rs:10:5
Nov 27 20:34:02.563 INFO [stderr]    |
Nov 27 20:34:02.563 INFO [stderr] 10 |     output.write(PROMPT.as_bytes());
Nov 27 20:34:02.563 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 27 20:34:02.563 INFO [stderr]    |
Nov 27 20:34:02.563 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Nov 27 20:34:02.563 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 27 20:34:02.563 INFO [stderr] 
Nov 27 20:34:02.563 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 27 20:34:02.563 INFO [stderr]   --> src/repl.rs:11:5
Nov 27 20:34:02.563 INFO [stderr]    |
Nov 27 20:34:02.563 INFO [stderr] 11 |     output.flush();
Nov 27 20:34:02.563 INFO [stderr]    |     ^^^^^^^^^^^^^^^
Nov 27 20:34:02.563 INFO [stderr]    |
Nov 27 20:34:02.563 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 27 20:34:02.563 INFO [stderr] 
Nov 27 20:34:02.563 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 27 20:34:02.563 INFO [stderr]   --> src/repl.rs:20:13
Nov 27 20:34:02.563 INFO [stderr]    |
Nov 27 20:34:02.563 INFO [stderr] 20 |             output.write(token.display().as_bytes());
Nov 27 20:34:02.563 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 27 20:34:02.563 INFO [stderr]    |
Nov 27 20:34:02.563 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 27 20:34:02.563 INFO [stderr] 
Nov 27 20:34:02.564 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 27 20:34:02.564 INFO [stderr]   --> src/repl.rs:21:13
Nov 27 20:34:02.564 INFO [stderr]    |
Nov 27 20:34:02.564 INFO [stderr] 21 |             output.write("\n".as_bytes());
Nov 27 20:34:02.564 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 27 20:34:02.564 INFO [stderr]    |
Nov 27 20:34:02.564 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 27 20:34:02.564 INFO [stderr] 
Nov 27 20:34:02.564 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 27 20:34:02.564 INFO [stderr]   --> src/repl.rs:22:13
Nov 27 20:34:02.564 INFO [stderr]    |
Nov 27 20:34:02.564 INFO [stderr] 22 |             output.flush();
Nov 27 20:34:02.564 INFO [stderr]    |             ^^^^^^^^^^^^^^^
Nov 27 20:34:02.564 INFO [stderr]    |
Nov 27 20:34:02.564 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 27 20:34:02.564 INFO [stderr] 
Nov 27 20:34:02.564 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 27 20:34:02.564 INFO [stderr]   --> src/repl.rs:24:9
Nov 27 20:34:02.564 INFO [stderr]    |
Nov 27 20:34:02.564 INFO [stderr] 24 |         output.write(PROMPT.as_bytes());
Nov 27 20:34:02.564 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 27 20:34:02.564 INFO [stderr]    |
Nov 27 20:34:02.564 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 27 20:34:02.564 INFO [stderr] 
Nov 27 20:34:02.564 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 27 20:34:02.564 INFO [stderr]   --> src/repl.rs:25:9
Nov 27 20:34:02.564 INFO [stderr]    |
Nov 27 20:34:02.564 INFO [stderr] 25 |         output.flush();
Nov 27 20:34:02.564 INFO [stderr]    |         ^^^^^^^^^^^^^^^
Nov 27 20:34:02.564 INFO [stderr]    |
Nov 27 20:34:02.564 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 27 20:34:02.564 INFO [stderr] 
Nov 27 20:34:02.586 INFO [stderr] warning: unused variable: `e`
Nov 27 20:34:02.586 INFO [stderr]   --> src/parser.rs:65:40
Nov 27 20:34:02.586 INFO [stderr]    |
Nov 27 20:34:02.586 INFO [stderr] 65 |             Statement::LetStatement(i, e) => {
Nov 27 20:34:02.586 INFO [stderr]    |                                        ^ help: consider using `_e` instead
Nov 27 20:34:02.586 INFO [stderr]    |
Nov 27 20:34:02.586 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Nov 27 20:34:02.586 INFO [stderr] 
Nov 27 20:34:02.632 INFO [stderr] warning: variant is never constructed: `LetStatement`
Nov 27 20:34:02.632 INFO [stderr]  --> src/ast.rs:9:5
Nov 27 20:34:02.632 INFO [stderr]   |
Nov 27 20:34:02.632 INFO [stderr] 9 |     LetStatement(Identifier, Expression),
Nov 27 20:34:02.632 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 27 20:34:02.632 INFO [stderr]   |
Nov 27 20:34:02.632 INFO [stderr]   = note: #[warn(dead_code)] on by default
Nov 27 20:34:02.632 INFO [stderr] 
Nov 27 20:34:02.632 INFO [stderr] warning: variant is never constructed: `ExpressionStatement`
Nov 27 20:34:02.632 INFO [stderr]   --> src/ast.rs:10:5
Nov 27 20:34:02.632 INFO [stderr]    |
Nov 27 20:34:02.632 INFO [stderr] 10 |     ExpressionStatement(Expression),
Nov 27 20:34:02.632 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 27 20:34:02.632 INFO [stderr] 
Nov 27 20:34:02.632 INFO [stderr] warning: field is never used: `lexer`
Nov 27 20:34:02.632 INFO [stderr]  --> src/parser.rs:7:5
Nov 27 20:34:02.632 INFO [stderr]   |
Nov 27 20:34:02.632 INFO [stderr] 7 |     lexer: Lexer,
Nov 27 20:34:02.632 INFO [stderr]   |     ^^^^^^^^^^^^
Nov 27 20:34:02.632 INFO [stderr] 
Nov 27 20:34:02.632 INFO [stderr] warning: field is never used: `cur_token`
Nov 27 20:34:02.632 INFO [stderr]  --> src/parser.rs:8:5
Nov 27 20:34:02.632 INFO [stderr]   |
Nov 27 20:34:02.632 INFO [stderr] 8 |     cur_token: Token,
Nov 27 20:34:02.632 INFO [stderr]   |     ^^^^^^^^^^^^^^^^
Nov 27 20:34:02.632 INFO [stderr] 
Nov 27 20:34:02.632 INFO [stderr] warning: field is never used: `peek_token`
Nov 27 20:34:02.632 INFO [stderr]  --> src/parser.rs:9:5
Nov 27 20:34:02.633 INFO [stderr]   |
Nov 27 20:34:02.633 INFO [stderr] 9 |     peek_token: Token,
Nov 27 20:34:02.633 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^
Nov 27 20:34:02.633 INFO [stderr] 
Nov 27 20:34:02.633 INFO [stderr] warning: method is never used: `next_token`
Nov 27 20:34:02.633 INFO [stderr]   --> src/parser.rs:23:5
Nov 27 20:34:02.633 INFO [stderr]    |
Nov 27 20:34:02.633 INFO [stderr] 23 |     fn next_token(mut self) {
Nov 27 20:34:02.633 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
Nov 27 20:34:02.633 INFO [stderr] 
Nov 27 20:34:02.641 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 27 20:34:02.641 INFO [stderr]   --> src/repl.rs:10:5
Nov 27 20:34:02.641 INFO [stderr]    |
Nov 27 20:34:02.641 INFO [stderr] 10 |     output.write(PROMPT.as_bytes());
Nov 27 20:34:02.641 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 27 20:34:02.642 INFO [stderr]    |
Nov 27 20:34:02.642 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Nov 27 20:34:02.642 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 27 20:34:02.642 INFO [stderr] 
Nov 27 20:34:02.642 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 27 20:34:02.642 INFO [stderr]   --> src/repl.rs:11:5
Nov 27 20:34:02.642 INFO [stderr]    |
Nov 27 20:34:02.642 INFO [stderr] 11 |     output.flush();
Nov 27 20:34:02.642 INFO [stderr]    |     ^^^^^^^^^^^^^^^
Nov 27 20:34:02.642 INFO [stderr]    |
Nov 27 20:34:02.642 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 27 20:34:02.642 INFO [stderr] 
Nov 27 20:34:02.642 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 27 20:34:02.642 INFO [stderr]   --> src/repl.rs:20:13
Nov 27 20:34:02.642 INFO [stderr]    |
Nov 27 20:34:02.642 INFO [stderr] 20 |             output.write(token.display().as_bytes());
Nov 27 20:34:02.642 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 27 20:34:02.642 INFO [stderr]    |
Nov 27 20:34:02.642 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 27 20:34:02.642 INFO [stderr] 
Nov 27 20:34:02.642 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 27 20:34:02.642 INFO [stderr]   --> src/repl.rs:21:13
Nov 27 20:34:02.642 INFO [stderr]    |
Nov 27 20:34:02.642 INFO [stderr] 21 |             output.write("\n".as_bytes());
Nov 27 20:34:02.642 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 27 20:34:02.642 INFO [stderr]    |
Nov 27 20:34:02.642 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 27 20:34:02.642 INFO [stderr] 
Nov 27 20:34:02.642 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 27 20:34:02.642 INFO [stderr]   --> src/repl.rs:22:13
Nov 27 20:34:02.642 INFO [stderr]    |
Nov 27 20:34:02.642 INFO [stderr] 22 |             output.flush();
Nov 27 20:34:02.642 INFO [stderr]    |             ^^^^^^^^^^^^^^^
Nov 27 20:34:02.642 INFO [stderr]    |
Nov 27 20:34:02.642 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 27 20:34:02.642 INFO [stderr] 
Nov 27 20:34:02.642 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 27 20:34:02.642 INFO [stderr]   --> src/repl.rs:24:9
Nov 27 20:34:02.642 INFO [stderr]    |
Nov 27 20:34:02.642 INFO [stderr] 24 |         output.write(PROMPT.as_bytes());
Nov 27 20:34:02.642 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 27 20:34:02.642 INFO [stderr]    |
Nov 27 20:34:02.642 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 27 20:34:02.642 INFO [stderr] 
Nov 27 20:34:02.642 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 27 20:34:02.642 INFO [stderr]   --> src/repl.rs:25:9
Nov 27 20:34:02.642 INFO [stderr]    |
Nov 27 20:34:02.642 INFO [stderr] 25 |         output.flush();
Nov 27 20:34:02.642 INFO [stderr]    |         ^^^^^^^^^^^^^^^
Nov 27 20:34:02.642 INFO [stderr]    |
Nov 27 20:34:02.643 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 27 20:34:02.643 INFO [stderr] 
Nov 27 20:34:02.669 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.33s
Nov 27 20:34:02.669 INFO [stderr] su: No module specific data is present
Nov 27 20:34:03.003 INFO running `"docker" "inspect" "ab0a174425c855838337bfa79548e32c12fc443f747c1569451e20a54d4c0ffb"`
Nov 27 20:34:03.110 INFO running `"docker" "rm" "-f" "ab0a174425c855838337bfa79548e32c12fc443f747c1569451e20a54d4c0ffb"`
Nov 27 20:34:03.202 INFO [stdout] ab0a174425c855838337bfa79548e32c12fc443f747c1569451e20a54d4c0ffb