[INFO] updating cached repository https://github.com/darksv/futon
[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] c1641aa859df9f05a202bc5e0d9416009fefa051
[INFO] checking darksv/futon against try#ea663bba38739867a4b75ac820991b4f5d093c3b for pr-62262-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdarksv%2Ffuton" "/workspace/builds/worker-8/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/darksv/futon on toolchain ea663bba38739867a4b75ac820991b4f5d093c3b
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/darksv/futon
[INFO] finished tweaking git repo https://github.com/darksv/futon
[INFO] tweaked toml for git repo https://github.com/darksv/futon written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/darksv/futon already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "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] f1d0e466ad25abba02ee805063ee8dd41ec5a87c38b785bc073afc3883d6280c
[INFO] running `"docker" "start" "-a" "f1d0e466ad25abba02ee805063ee8dd41ec5a87c38b785bc073afc3883d6280c"`
[INFO] [stderr]     Checking untitled v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> src/lexer.rs:29:1
[INFO] [stderr]    |
[INFO] [stderr] 29 |   /// Registration of keywords supported by language
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 30 | / keywords! {
[INFO] [stderr] 31 | |     "if" => If,
[INFO] [stderr] 32 | |     "else" => Else,
[INFO] [stderr] 33 | |     "for" => For,
[INFO] [stderr] ...  |
[INFO] [stderr] 42 | |     "in" => In
[INFO] [stderr] 43 | | }
[INFO] [stderr]    | |_- rustdoc does not generate documentation for macro expansions
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stderr]    = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stderr] 
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> src/lexer.rs:29:1
[INFO] [stderr]    |
[INFO] [stderr] 29 |   /// Registration of keywords supported by language
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 30 | / keywords! {
[INFO] [stderr] 31 | |     "if" => If,
[INFO] [stderr] 32 | |     "else" => Else,
[INFO] [stderr] 33 | |     "for" => For,
[INFO] [stderr] ...  |
[INFO] [stderr] 42 | |     "in" => In
[INFO] [stderr] 43 | | }
[INFO] [stderr]    | |_- rustdoc does not generate documentation for macro expansions
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stderr]    = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]    --> src/lexer.rs:465:25
[INFO] [stderr]     |
[INFO] [stderr] 465 |                 Some('0'...'9') | Some('_') => self.advance().unwrap(),
[INFO] [stderr]     |                         ^^^ help: use `..=` for an inclusive range
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(ellipsis_inclusive_range_patterns)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]    --> src/lexer.rs:465:25
[INFO] [stderr]     |
[INFO] [stderr] 465 |                 Some('0'...'9') | Some('_') => self.advance().unwrap(),
[INFO] [stderr]     |                         ^^^ help: use `..=` for an inclusive range
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(ellipsis_inclusive_range_patterns)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `PunctKind`
[INFO] [stderr]    --> src/lexer.rs:540:87
[INFO] [stderr]     |
[INFO] [stderr] 540 |     use super::{Lexer, LexerError, Token, SourceSpan, TokenType, TokenValue, Keyword, PunctKind};
[INFO] [stderr]     |                                                                                       ^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `from_str`
[INFO] [stderr]    --> src/lexer.rs:235:5
[INFO] [stderr]     |
[INFO] [stderr] 235 |     pub fn from_str(str: &'a str, line: usize, column: usize) -> SourceSpan<'a> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.42s
[INFO] running `"docker" "inspect" "f1d0e466ad25abba02ee805063ee8dd41ec5a87c38b785bc073afc3883d6280c"`
[INFO] running `"docker" "rm" "-f" "f1d0e466ad25abba02ee805063ee8dd41ec5a87c38b785bc073afc3883d6280c"`
[INFO] [stdout] f1d0e466ad25abba02ee805063ee8dd41ec5a87c38b785bc073afc3883d6280c