[INFO] cloning repository https://github.com/hwoongkang/compilers_exercises
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/hwoongkang/compilers_exercises" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhwoongkang%2Fcompilers_exercises", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhwoongkang%2Fcompilers_exercises'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8da73a8847f3b6172a133613e019c3de022c66b2
[INFO] testing hwoongkang/compilers_exercises against master#cdb45c87e2cd43495379f7e867e3cc15dcee9f93 for pr-145838-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhwoongkang%2Fcompilers_exercises" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/hwoongkang/compilers_exercises
[INFO] finished tweaking git repo https://github.com/hwoongkang/compilers_exercises
[INFO] tweaked toml for git repo https://github.com/hwoongkang/compilers_exercises written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/hwoongkang/compilers_exercises on toolchain cdb45c87e2cd43495379f7e867e3cc15dcee9f93
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/hwoongkang/compilers_exercises already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e652dfd5ce67f2f77ff3299407c13a70081c1e52d1387f47a5e9290c50f8b830
[INFO] running `Command { std: "docker" "start" "-a" "e652dfd5ce67f2f77ff3299407c13a70081c1e52d1387f47a5e9290c50f8b830", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e652dfd5ce67f2f77ff3299407c13a70081c1e52d1387f47a5e9290c50f8b830", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e652dfd5ce67f2f77ff3299407c13a70081c1e52d1387f47a5e9290c50f8b830", kill_on_drop: false }`
[INFO] [stdout] e652dfd5ce67f2f77ff3299407c13a70081c1e52d1387f47a5e9290c50f8b830
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 14dee7f245daf1a8cef1e38dbdb29b8c9aefc672a364f65e110d2a8fd8b2dbca
[INFO] running `Command { std: "docker" "start" "-a" "14dee7f245daf1a8cef1e38dbdb29b8c9aefc672a364f65e110d2a8fd8b2dbca", kill_on_drop: false }`
[INFO] [stderr]    Compiling exercises v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around `break` value
[INFO] [stdout]    --> src/chapters/chapter_2_6/lexer.rs:154:35
[INFO] [stdout]     |
[INFO] [stdout] 154 |                     None => break (Err(LexerError::UnexpectedEOF)),
[INFO] [stdout]     |                                   ^                              ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 154 -                     None => break (Err(LexerError::UnexpectedEOF)),
[INFO] [stdout] 154 +                     None => break Err(LexerError::UnexpectedEOF),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated constant `NUM` is never used
[INFO] [stdout]  --> src/chapters/chapter_2_6/tag.rs:5:15
[INFO] [stdout]   |
[INFO] [stdout] 4 | impl Tag {
[INFO] [stdout]   | -------- associated constant in this implementation
[INFO] [stdout] 5 |     pub const NUM: Tag = Tag(256);
[INFO] [stdout]   |               ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `get_tag` is never used
[INFO] [stdout]  --> src/chapters/chapter_2_6/token.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub trait Token: std::fmt::Display {
[INFO] [stdout]   |           ----- method in this trait
[INFO] [stdout] 5 |     fn get_tag(&self) -> Tag;
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.47s
[INFO] running `Command { std: "docker" "inspect" "14dee7f245daf1a8cef1e38dbdb29b8c9aefc672a364f65e110d2a8fd8b2dbca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "14dee7f245daf1a8cef1e38dbdb29b8c9aefc672a364f65e110d2a8fd8b2dbca", kill_on_drop: false }`
[INFO] [stdout] 14dee7f245daf1a8cef1e38dbdb29b8c9aefc672a364f65e110d2a8fd8b2dbca
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a8737b10c5b41999e184ce81775227d6f58c509b2a95fde04e35383fada22562
[INFO] running `Command { std: "docker" "start" "-a" "a8737b10c5b41999e184ce81775227d6f58c509b2a95fde04e35383fada22562", kill_on_drop: false }`
[INFO] [stderr]    Compiling exercises v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around `break` value
[INFO] [stdout]    --> src/chapters/chapter_2_6/lexer.rs:154:35
[INFO] [stdout]     |
[INFO] [stdout] 154 |                     None => break (Err(LexerError::UnexpectedEOF)),
[INFO] [stdout]     |                                   ^                              ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 154 -                     None => break (Err(LexerError::UnexpectedEOF)),
[INFO] [stdout] 154 +                     None => break Err(LexerError::UnexpectedEOF),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated constant `NUM` is never used
[INFO] [stdout]  --> src/chapters/chapter_2_6/tag.rs:5:15
[INFO] [stdout]   |
[INFO] [stdout] 4 | impl Tag {
[INFO] [stdout]   | -------- associated constant in this implementation
[INFO] [stdout] 5 |     pub const NUM: Tag = Tag(256);
[INFO] [stdout]   |               ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `get_tag` is never used
[INFO] [stdout]  --> src/chapters/chapter_2_6/token.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub trait Token: std::fmt::Display {
[INFO] [stdout]   |           ----- method in this trait
[INFO] [stdout] 5 |     fn get_tag(&self) -> Tag;
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.55s
[INFO] running `Command { std: "docker" "inspect" "a8737b10c5b41999e184ce81775227d6f58c509b2a95fde04e35383fada22562", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a8737b10c5b41999e184ce81775227d6f58c509b2a95fde04e35383fada22562", kill_on_drop: false }`
[INFO] [stdout] a8737b10c5b41999e184ce81775227d6f58c509b2a95fde04e35383fada22562
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] acb2abc37cffb2a31323b12ce9ebe7b84f8643f4a7f6fb24d258e4a6c91896cd
[INFO] running `Command { std: "docker" "start" "-a" "acb2abc37cffb2a31323b12ce9ebe7b84f8643f4a7f6fb24d258e4a6c91896cd", kill_on_drop: false }`
[INFO] [stderr] warning: unnecessary parentheses around `break` value
[INFO] [stderr]    --> src/chapters/chapter_2_6/lexer.rs:154:35
[INFO] [stderr]     |
[INFO] [stderr] 154 |                     None => break (Err(LexerError::UnexpectedEOF)),
[INFO] [stderr]     |                                   ^                              ^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr] 154 -                     None => break (Err(LexerError::UnexpectedEOF)),
[INFO] [stderr] 154 +                     None => break Err(LexerError::UnexpectedEOF),
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: associated constant `NUM` is never used
[INFO] [stderr]  --> src/chapters/chapter_2_6/tag.rs:5:15
[INFO] [stderr]   |
[INFO] [stderr] 4 | impl Tag {
[INFO] [stderr]   | -------- associated constant in this implementation
[INFO] [stderr] 5 |     pub const NUM: Tag = Tag(256);
[INFO] [stderr]   |               ^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method `get_tag` is never used
[INFO] [stderr]  --> src/chapters/chapter_2_6/token.rs:5:8
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub trait Token: std::fmt::Display {
[INFO] [stderr]   |           ----- method in this trait
[INFO] [stderr] 5 |     fn get_tag(&self) -> Tag;
[INFO] [stderr]   |        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `exercises` (bin "exercises" test) generated 3 warnings (run `cargo fix --bin "exercises" --tests` to apply 1 suggestion)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/exercises-4709439680bbf3e6)
[INFO] [stdout] 
[INFO] [stdout] running 9 tests
[INFO] [stdout] test chapters::chapter_2_6::lexer::lexer_tests::test_first_scan ... ok
[INFO] [stdout] test chapters::chapter_2_6::lexer::lexer_tests::test_multiline_comment_eof ... ok
[INFO] [stdout] test chapters::chapter_2_6::lexer::lexer_tests::test_single_line_comment ... ok
[INFO] [stdout] test chapters::chapter_2_6::lexer::lexer_tests::test_single_line_comment_fail ... ok
[INFO] [stdout] test chapters::chapter_2_6::lexer::lexer_tests::test_multiline_comment ... ok
[INFO] [stdout] test chapters::chapter_2_6::lexer::lexer_tests::test_multiline_comment_asterisk ... ok
[INFO] [stdout] test chapters::chapter_2_6::lexer::lexer_tests::test_comment_unexpected_token ... ok
[INFO] [stdout] test chapters::chapter_2_6::lexer::lexer_tests::test_white_space ... ok
[INFO] [stdout] test chapters::chapter_2_6::lexer::lexer_tests::test_empty_lexer ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 9 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "acb2abc37cffb2a31323b12ce9ebe7b84f8643f4a7f6fb24d258e4a6c91896cd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "acb2abc37cffb2a31323b12ce9ebe7b84f8643f4a7f6fb24d258e4a6c91896cd", kill_on_drop: false }`
[INFO] [stdout] acb2abc37cffb2a31323b12ce9ebe7b84f8643f4a7f6fb24d258e4a6c91896cd