Dec 11 09:38:35.721 INFO checking shhr1214/monkey-rust against try#aa9aa79c3c583aab59ac9134542d60a780c35e2e for pr-56677
Dec 11 09:38:35.722 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56677/worker-4/try#aa9aa79c3c583aab59ac9134542d60a780c35e2e:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-4/pr-56677/try#aa9aa79c3c583aab59ac9134542d60a780c35e2e:/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 +aa9aa79c3c583aab59ac9134542d60a780c35e2e-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"`
Dec 11 09:38:35.946 INFO [stdout] d0941f464f575d498e71b8e6cc2d42c48b5cc2afb930604ef82e5129b47733f0
Dec 11 09:38:35.946 INFO running `"docker" "start" "-a" "d0941f464f575d498e71b8e6cc2d42c48b5cc2afb930604ef82e5129b47733f0"`
Dec 11 09:38:36.354 INFO [stderr] usermod: no changes
Dec 11 09:38:36.405 INFO [stderr]     Checking monkey-rust v0.1.0 (/source)
Dec 11 09:38:36.562 INFO [stderr] warning: unused import: `token::Token`
Dec 11 09:38:36.562 INFO [stderr]  --> src/ast.rs:2:5
Dec 11 09:38:36.562 INFO [stderr]   |
Dec 11 09:38:36.562 INFO [stderr] 2 | use token::Token;
Dec 11 09:38:36.562 INFO [stderr]   |     ^^^^^^^^^^^^
Dec 11 09:38:36.562 INFO [stderr]   |
Dec 11 09:38:36.562 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 11 09:38:36.562 INFO [stderr] 
Dec 11 09:38:36.562 INFO [stderr] warning: unused imports: `Node`, `Statement`
Dec 11 09:38:36.562 INFO [stderr]  --> src/parser.rs:1:11
Dec 11 09:38:36.562 INFO [stderr]   |
Dec 11 09:38:36.562 INFO [stderr] 1 | use ast::{Node, Program, Statement};
Dec 11 09:38:36.562 INFO [stderr]   |           ^^^^           ^^^^^^^^^
Dec 11 09:38:36.563 INFO [stderr] 
Dec 11 09:38:36.563 INFO [stderr] warning: unused import: `token`
Dec 11 09:38:36.563 INFO [stderr]  --> src/parser.rs:3:5
Dec 11 09:38:36.563 INFO [stderr]   |
Dec 11 09:38:36.563 INFO [stderr] 3 | use token;
Dec 11 09:38:36.563 INFO [stderr]   |     ^^^^^
Dec 11 09:38:36.563 INFO [stderr] 
Dec 11 09:38:36.563 INFO [stderr] warning: unused import: `Result`
Dec 11 09:38:36.563 INFO [stderr]  --> src/repl.rs:1:41
Dec 11 09:38:36.563 INFO [stderr]   |
Dec 11 09:38:36.563 INFO [stderr] 1 | use std::io::{BufRead, BufReader, Read, Result, Write};
Dec 11 09:38:36.563 INFO [stderr]   |                                         ^^^^^^
Dec 11 09:38:36.563 INFO [stderr] 
Dec 11 09:38:36.585 INFO [stderr] warning: unused import: `token::Token`
Dec 11 09:38:36.586 INFO [stderr]  --> src/ast.rs:2:5
Dec 11 09:38:36.586 INFO [stderr]   |
Dec 11 09:38:36.586 INFO [stderr] 2 | use token::Token;
Dec 11 09:38:36.586 INFO [stderr]   |     ^^^^^^^^^^^^
Dec 11 09:38:36.586 INFO [stderr]   |
Dec 11 09:38:36.586 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 11 09:38:36.586 INFO [stderr] 
Dec 11 09:38:36.586 INFO [stderr] warning: unused import: `Node`
Dec 11 09:38:36.586 INFO [stderr]  --> src/parser.rs:1:11
Dec 11 09:38:36.586 INFO [stderr]   |
Dec 11 09:38:36.586 INFO [stderr] 1 | use ast::{Node, Program, Statement};
Dec 11 09:38:36.586 INFO [stderr]   |           ^^^^
Dec 11 09:38:36.586 INFO [stderr] 
Dec 11 09:38:36.586 INFO [stderr] warning: unused import: `Result`
Dec 11 09:38:36.586 INFO [stderr]  --> src/repl.rs:1:41
Dec 11 09:38:36.586 INFO [stderr]   |
Dec 11 09:38:36.586 INFO [stderr] 1 | use std::io::{BufRead, BufReader, Read, Result, Write};
Dec 11 09:38:36.586 INFO [stderr]   |                                         ^^^^^^
Dec 11 09:38:36.586 INFO [stderr] 
Dec 11 09:38:36.631 INFO [stderr] warning: enum is never used: `Statement`
Dec 11 09:38:36.631 INFO [stderr]  --> src/ast.rs:8:1
Dec 11 09:38:36.631 INFO [stderr]   |
Dec 11 09:38:36.631 INFO [stderr] 8 | pub enum Statement {
Dec 11 09:38:36.631 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^
Dec 11 09:38:36.631 INFO [stderr]   |
Dec 11 09:38:36.631 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 11 09:38:36.631 INFO [stderr] 
Dec 11 09:38:36.631 INFO [stderr] warning: struct is never constructed: `Expression`
Dec 11 09:38:36.631 INFO [stderr]   --> src/ast.rs:22:1
Dec 11 09:38:36.631 INFO [stderr]    |
Dec 11 09:38:36.631 INFO [stderr] 22 | pub struct Expression {}
Dec 11 09:38:36.631 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^
Dec 11 09:38:36.631 INFO [stderr] 
Dec 11 09:38:36.631 INFO [stderr] warning: struct is never constructed: `Program`
Dec 11 09:38:36.631 INFO [stderr]   --> src/ast.rs:24:1
Dec 11 09:38:36.631 INFO [stderr]    |
Dec 11 09:38:36.631 INFO [stderr] 24 | pub struct Program {
Dec 11 09:38:36.631 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^
Dec 11 09:38:36.631 INFO [stderr] 
Dec 11 09:38:36.631 INFO [stderr] warning: method is never used: `new`
Dec 11 09:38:36.631 INFO [stderr]   --> src/ast.rs:29:5
Dec 11 09:38:36.631 INFO [stderr]    |
Dec 11 09:38:36.631 INFO [stderr] 29 |     pub fn new() -> Program {
Dec 11 09:38:36.631 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 09:38:36.631 INFO [stderr] 
Dec 11 09:38:36.631 INFO [stderr] warning: method is never used: `statements`
Dec 11 09:38:36.631 INFO [stderr]   --> src/ast.rs:35:5
Dec 11 09:38:36.631 INFO [stderr]    |
Dec 11 09:38:36.631 INFO [stderr] 35 |     pub fn statements(self) -> Vec<Statement> {
Dec 11 09:38:36.631 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 09:38:36.631 INFO [stderr] 
Dec 11 09:38:36.631 INFO [stderr] warning: struct is never constructed: `Identifier`
Dec 11 09:38:36.631 INFO [stderr]   --> src/ast.rs:53:1
Dec 11 09:38:36.631 INFO [stderr]    |
Dec 11 09:38:36.631 INFO [stderr] 53 | pub struct Identifier(pub String);
Dec 11 09:38:36.631 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 09:38:36.631 INFO [stderr] 
Dec 11 09:38:36.631 INFO [stderr] warning: struct is never constructed: `Parser`
Dec 11 09:38:36.631 INFO [stderr]  --> src/parser.rs:6:1
Dec 11 09:38:36.631 INFO [stderr]   |
Dec 11 09:38:36.631 INFO [stderr] 6 | struct Parser {
Dec 11 09:38:36.631 INFO [stderr]   | ^^^^^^^^^^^^^
Dec 11 09:38:36.631 INFO [stderr] 
Dec 11 09:38:36.631 INFO [stderr] warning: method is never used: `new`
Dec 11 09:38:36.631 INFO [stderr]   --> src/parser.rs:13:5
Dec 11 09:38:36.631 INFO [stderr]    |
Dec 11 09:38:36.631 INFO [stderr] 13 |     pub fn new(mut lexer: Lexer) -> Parser {
Dec 11 09:38:36.631 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 09:38:36.631 INFO [stderr] 
Dec 11 09:38:36.631 INFO [stderr] warning: method is never used: `next_token`
Dec 11 09:38:36.631 INFO [stderr]   --> src/parser.rs:23:5
Dec 11 09:38:36.631 INFO [stderr]    |
Dec 11 09:38:36.631 INFO [stderr] 23 |     fn next_token(mut self) {
Dec 11 09:38:36.631 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 09:38:36.631 INFO [stderr] 
Dec 11 09:38:36.631 INFO [stderr] warning: method is never used: `parse_program`
Dec 11 09:38:36.631 INFO [stderr]   --> src/parser.rs:28:5
Dec 11 09:38:36.631 INFO [stderr]    |
Dec 11 09:38:36.631 INFO [stderr] 28 |     fn parse_program(&self) -> Program {
Dec 11 09:38:36.631 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 09:38:36.631 INFO [stderr] 
Dec 11 09:38:36.631 INFO [stderr] warning: method is never used: `literal`
Dec 11 09:38:36.631 INFO [stderr]   --> src/token.rs:60:5
Dec 11 09:38:36.631 INFO [stderr]    |
Dec 11 09:38:36.631 INFO [stderr] 60 |     pub fn literal(&self) -> String {
Dec 11 09:38:36.631 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 09:38:36.631 INFO [stderr] 
Dec 11 09:38:36.642 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 11 09:38:36.642 INFO [stderr]   --> src/repl.rs:10:5
Dec 11 09:38:36.642 INFO [stderr]    |
Dec 11 09:38:36.642 INFO [stderr] 10 |     output.write(PROMPT.as_bytes());
Dec 11 09:38:36.642 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 09:38:36.642 INFO [stderr]    |
Dec 11 09:38:36.642 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 11 09:38:36.642 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 11 09:38:36.642 INFO [stderr] 
Dec 11 09:38:36.642 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 11 09:38:36.642 INFO [stderr]   --> src/repl.rs:11:5
Dec 11 09:38:36.642 INFO [stderr]    |
Dec 11 09:38:36.642 INFO [stderr] 11 |     output.flush();
Dec 11 09:38:36.642 INFO [stderr]    |     ^^^^^^^^^^^^^^^
Dec 11 09:38:36.642 INFO [stderr]    |
Dec 11 09:38:36.642 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 11 09:38:36.642 INFO [stderr] 
Dec 11 09:38:36.642 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 11 09:38:36.642 INFO [stderr]   --> src/repl.rs:20:13
Dec 11 09:38:36.642 INFO [stderr]    |
Dec 11 09:38:36.642 INFO [stderr] 20 |             output.write(token.display().as_bytes());
Dec 11 09:38:36.642 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 09:38:36.642 INFO [stderr]    |
Dec 11 09:38:36.642 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 11 09:38:36.642 INFO [stderr] 
Dec 11 09:38:36.642 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 11 09:38:36.642 INFO [stderr]   --> src/repl.rs:21:13
Dec 11 09:38:36.642 INFO [stderr]    |
Dec 11 09:38:36.642 INFO [stderr] 21 |             output.write("\n".as_bytes());
Dec 11 09:38:36.642 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 09:38:36.642 INFO [stderr]    |
Dec 11 09:38:36.642 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 11 09:38:36.642 INFO [stderr] 
Dec 11 09:38:36.642 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 11 09:38:36.642 INFO [stderr]   --> src/repl.rs:22:13
Dec 11 09:38:36.642 INFO [stderr]    |
Dec 11 09:38:36.642 INFO [stderr] 22 |             output.flush();
Dec 11 09:38:36.642 INFO [stderr]    |             ^^^^^^^^^^^^^^^
Dec 11 09:38:36.642 INFO [stderr]    |
Dec 11 09:38:36.642 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 11 09:38:36.642 INFO [stderr] 
Dec 11 09:38:36.642 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 11 09:38:36.642 INFO [stderr]   --> src/repl.rs:24:9
Dec 11 09:38:36.642 INFO [stderr]    |
Dec 11 09:38:36.642 INFO [stderr] 24 |         output.write(PROMPT.as_bytes());
Dec 11 09:38:36.642 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 09:38:36.642 INFO [stderr]    |
Dec 11 09:38:36.642 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 11 09:38:36.642 INFO [stderr] 
Dec 11 09:38:36.642 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 11 09:38:36.642 INFO [stderr]   --> src/repl.rs:25:9
Dec 11 09:38:36.642 INFO [stderr]    |
Dec 11 09:38:36.642 INFO [stderr] 25 |         output.flush();
Dec 11 09:38:36.642 INFO [stderr]    |         ^^^^^^^^^^^^^^^
Dec 11 09:38:36.642 INFO [stderr]    |
Dec 11 09:38:36.642 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 11 09:38:36.642 INFO [stderr] 
Dec 11 09:38:36.675 INFO [stderr] warning: unused variable: `e`
Dec 11 09:38:36.675 INFO [stderr]   --> src/parser.rs:65:40
Dec 11 09:38:36.675 INFO [stderr]    |
Dec 11 09:38:36.675 INFO [stderr] 65 |             Statement::LetStatement(i, e) => {
Dec 11 09:38:36.675 INFO [stderr]    |                                        ^ help: consider using `_e` instead
Dec 11 09:38:36.675 INFO [stderr]    |
Dec 11 09:38:36.675 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 11 09:38:36.675 INFO [stderr] 
Dec 11 09:38:36.712 INFO [stderr] warning: variant is never constructed: `LetStatement`
Dec 11 09:38:36.712 INFO [stderr]  --> src/ast.rs:9:5
Dec 11 09:38:36.712 INFO [stderr]   |
Dec 11 09:38:36.712 INFO [stderr] 9 |     LetStatement(Identifier, Expression),
Dec 11 09:38:36.712 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 09:38:36.712 INFO [stderr]   |
Dec 11 09:38:36.712 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 11 09:38:36.712 INFO [stderr] 
Dec 11 09:38:36.712 INFO [stderr] warning: variant is never constructed: `ExpressionStatement`
Dec 11 09:38:36.712 INFO [stderr]   --> src/ast.rs:10:5
Dec 11 09:38:36.712 INFO [stderr]    |
Dec 11 09:38:36.712 INFO [stderr] 10 |     ExpressionStatement(Expression),
Dec 11 09:38:36.712 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 09:38:36.712 INFO [stderr] 
Dec 11 09:38:36.712 INFO [stderr] warning: field is never used: `lexer`
Dec 11 09:38:36.712 INFO [stderr]  --> src/parser.rs:7:5
Dec 11 09:38:36.712 INFO [stderr]   |
Dec 11 09:38:36.712 INFO [stderr] 7 |     lexer: Lexer,
Dec 11 09:38:36.712 INFO [stderr]   |     ^^^^^^^^^^^^
Dec 11 09:38:36.712 INFO [stderr] 
Dec 11 09:38:36.712 INFO [stderr] warning: field is never used: `cur_token`
Dec 11 09:38:36.712 INFO [stderr]  --> src/parser.rs:8:5
Dec 11 09:38:36.712 INFO [stderr]   |
Dec 11 09:38:36.712 INFO [stderr] 8 |     cur_token: Token,
Dec 11 09:38:36.712 INFO [stderr]   |     ^^^^^^^^^^^^^^^^
Dec 11 09:38:36.712 INFO [stderr] 
Dec 11 09:38:36.712 INFO [stderr] warning: field is never used: `peek_token`
Dec 11 09:38:36.712 INFO [stderr]  --> src/parser.rs:9:5
Dec 11 09:38:36.712 INFO [stderr]   |
Dec 11 09:38:36.712 INFO [stderr] 9 |     peek_token: Token,
Dec 11 09:38:36.712 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^
Dec 11 09:38:36.712 INFO [stderr] 
Dec 11 09:38:36.712 INFO [stderr] warning: method is never used: `next_token`
Dec 11 09:38:36.712 INFO [stderr]   --> src/parser.rs:23:5
Dec 11 09:38:36.712 INFO [stderr]    |
Dec 11 09:38:36.712 INFO [stderr] 23 |     fn next_token(mut self) {
Dec 11 09:38:36.712 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 09:38:36.712 INFO [stderr] 
Dec 11 09:38:36.722 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 11 09:38:36.722 INFO [stderr]   --> src/repl.rs:10:5
Dec 11 09:38:36.722 INFO [stderr]    |
Dec 11 09:38:36.722 INFO [stderr] 10 |     output.write(PROMPT.as_bytes());
Dec 11 09:38:36.722 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 09:38:36.722 INFO [stderr]    |
Dec 11 09:38:36.722 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 11 09:38:36.722 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 11 09:38:36.722 INFO [stderr] 
Dec 11 09:38:36.722 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 11 09:38:36.722 INFO [stderr]   --> src/repl.rs:11:5
Dec 11 09:38:36.722 INFO [stderr]    |
Dec 11 09:38:36.722 INFO [stderr] 11 |     output.flush();
Dec 11 09:38:36.722 INFO [stderr]    |     ^^^^^^^^^^^^^^^
Dec 11 09:38:36.722 INFO [stderr]    |
Dec 11 09:38:36.722 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 11 09:38:36.722 INFO [stderr] 
Dec 11 09:38:36.722 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 11 09:38:36.722 INFO [stderr]   --> src/repl.rs:20:13
Dec 11 09:38:36.722 INFO [stderr]    |
Dec 11 09:38:36.722 INFO [stderr] 20 |             output.write(token.display().as_bytes());
Dec 11 09:38:36.723 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 09:38:36.723 INFO [stderr]    |
Dec 11 09:38:36.723 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 11 09:38:36.723 INFO [stderr] 
Dec 11 09:38:36.723 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 11 09:38:36.723 INFO [stderr]   --> src/repl.rs:21:13
Dec 11 09:38:36.723 INFO [stderr]    |
Dec 11 09:38:36.723 INFO [stderr] 21 |             output.write("\n".as_bytes());
Dec 11 09:38:36.723 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 09:38:36.723 INFO [stderr]    |
Dec 11 09:38:36.723 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 11 09:38:36.723 INFO [stderr] 
Dec 11 09:38:36.723 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 11 09:38:36.723 INFO [stderr]   --> src/repl.rs:22:13
Dec 11 09:38:36.723 INFO [stderr]    |
Dec 11 09:38:36.723 INFO [stderr] 22 |             output.flush();
Dec 11 09:38:36.723 INFO [stderr]    |             ^^^^^^^^^^^^^^^
Dec 11 09:38:36.723 INFO [stderr]    |
Dec 11 09:38:36.723 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 11 09:38:36.723 INFO [stderr] 
Dec 11 09:38:36.723 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 11 09:38:36.723 INFO [stderr]   --> src/repl.rs:24:9
Dec 11 09:38:36.723 INFO [stderr]    |
Dec 11 09:38:36.723 INFO [stderr] 24 |         output.write(PROMPT.as_bytes());
Dec 11 09:38:36.723 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 09:38:36.723 INFO [stderr]    |
Dec 11 09:38:36.723 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 11 09:38:36.723 INFO [stderr] 
Dec 11 09:38:36.723 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 11 09:38:36.723 INFO [stderr]   --> src/repl.rs:25:9
Dec 11 09:38:36.723 INFO [stderr]    |
Dec 11 09:38:36.723 INFO [stderr] 25 |         output.flush();
Dec 11 09:38:36.723 INFO [stderr]    |         ^^^^^^^^^^^^^^^
Dec 11 09:38:36.723 INFO [stderr]    |
Dec 11 09:38:36.723 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 11 09:38:36.723 INFO [stderr] 
Dec 11 09:38:36.743 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.36s
Dec 11 09:38:36.744 INFO [stderr] su: No module specific data is present
Dec 11 09:38:37.070 INFO running `"docker" "inspect" "d0941f464f575d498e71b8e6cc2d42c48b5cc2afb930604ef82e5129b47733f0"`
Dec 11 09:38:37.159 INFO running `"docker" "rm" "-f" "d0941f464f575d498e71b8e6cc2d42c48b5cc2afb930604ef82e5129b47733f0"`
Dec 11 09:38:37.263 INFO [stdout] d0941f464f575d498e71b8e6cc2d42c48b5cc2afb930604ef82e5129b47733f0