[INFO] updating cached repository https://github.com/tawashichan/toy_lang
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] de785a2762c96a20645643bc66be482aba37094b
[INFO] checking tawashichan/toy_lang against master#fdc0011561c6365c596dfd8fa1ef388162bc89c7 for pr-66504-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftawashichan%2Ftoy_lang" "/workspace/builds/worker-7/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/tawashichan/toy_lang on toolchain fdc0011561c6365c596dfd8fa1ef388162bc89c7
[INFO] running `"/workspace/cargo-home/bin/cargo" "+fdc0011561c6365c596dfd8fa1ef388162bc89c7" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/tawashichan/toy_lang
[INFO] finished tweaking git repo https://github.com/tawashichan/toy_lang
[INFO] tweaked toml for git repo https://github.com/tawashichan/toy_lang written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/tawashichan/toy_lang already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+fdc0011561c6365c596dfd8fa1ef388162bc89c7" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+fdc0011561c6365c596dfd8fa1ef388162bc89c7" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 6eff77d841b489f5ba3667b2c422e33a8ee43c4f0b2269c8b86307e739be0d7c
[INFO] running `"docker" "start" "-a" "6eff77d841b489f5ba3667b2c422e33a8ee43c4f0b2269c8b86307e739be0d7c"`
[INFO] [stderr]     Checking dentaku-gen v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused variable: `source`
[INFO] [stderr]  --> src/main.rs:7:13
[INFO] [stderr]   |
[INFO] [stderr] 7 |     let mut source = "1 + 2 * 6 - 1".chars().collect::<Vec<char>>();
[INFO] [stderr]   |             ^^^^^^ help: consider prefixing with an underscore: `_source`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]  --> src/main.rs:7:9
[INFO] [stderr]   |
[INFO] [stderr] 7 |     let mut source = "1 + 2 * 6 - 1".chars().collect::<Vec<char>>();
[INFO] [stderr]   |         ----^^^^^^
[INFO] [stderr]   |         |
[INFO] [stderr]   |         help: remove this `mut`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Equal`
[INFO] [stderr]   --> src/lexer.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 |     Equal,
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Colon`
[INFO] [stderr]   --> src/lexer.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 |     Colon,
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `RDI`
[INFO] [stderr]  --> src/stack_machine.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 |     RDI,
[INFO] [stderr]   |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `RSI`
[INFO] [stderr]  --> src/stack_machine.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     RSI,
[INFO] [stderr]   |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `RAX`
[INFO] [stderr]  --> src/stack_machine.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     RAX,
[INFO] [stderr]   |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Pop`
[INFO] [stderr]   --> src/stack_machine.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 |     Pop,
[INFO] [stderr]    |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Ret`
[INFO] [stderr]   --> src/stack_machine.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 18 |     Ret,
[INFO] [stderr]    |     ^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0308]: mismatched types
[INFO] [stderr]    --> src/lexer.rs:104:30
[INFO] [stderr]     |
[INFO] [stderr] 104 |     let tokens = parse_token(&chars);
[INFO] [stderr]     |                              ^^^^^^ types differ in mutability
[INFO] [stderr]     |
[INFO] [stderr]     = note: expected mutable reference `&mut [char]`
[INFO] [stderr]                        found reference `&std::vec::Vec<char>`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0308`.
[INFO] [stderr] error: could not compile `dentaku-gen`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "6eff77d841b489f5ba3667b2c422e33a8ee43c4f0b2269c8b86307e739be0d7c"`
[INFO] running `"docker" "rm" "-f" "6eff77d841b489f5ba3667b2c422e33a8ee43c4f0b2269c8b86307e739be0d7c"`
[INFO] [stdout] 6eff77d841b489f5ba3667b2c422e33a8ee43c4f0b2269c8b86307e739be0d7c