[INFO] updating cached repository https://github.com/o-in25/iron
[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] 48709446c76a23ec3a081a2b9979207f93166786
[INFO] checking o-in25/iron against try#ea663bba38739867a4b75ac820991b4f5d093c3b for pr-62262-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fo-in25%2Firon" "/workspace/builds/worker-5/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/o-in25/iron 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/o-in25/iron
[INFO] finished tweaking git repo https://github.com/o-in25/iron
[INFO] tweaked toml for git repo https://github.com/o-in25/iron written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/o-in25/iron already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] 6f6fa523d458bbbd142553c6bd737a646d7fa9b8e51aba909f3bac02c6dcba93
[INFO] running `"docker" "start" "-a" "6f6fa523d458bbbd142553c6bd737a646d7fa9b8e51aba909f3bac02c6dcba93"`
[INFO] [stderr]     Checking backtrace v0.2.3
[INFO] [stderr]     Checking stacktrace v0.2.1
[INFO] [stderr]     Checking iron v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `regex::Regex`
[INFO] [stderr]   --> src/main.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 | use regex::Regex;
[INFO] [stderr]    |     ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::vec::Vec`
[INFO] [stderr]  --> src/lexer.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 | use std::vec::Vec;
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `regex::Regex`
[INFO] [stderr]   --> src/main.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 | use regex::Regex;
[INFO] [stderr]    |     ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::vec::Vec`
[INFO] [stderr]  --> src/lexer.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 | use std::vec::Vec;
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `CloseBrace`
[INFO] [stderr]   --> src/lexer.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     CloseBrace,
[INFO] [stderr]    |     ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `OpenParenthesis`
[INFO] [stderr]   --> src/lexer.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 |     OpenParenthesis,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `CloseParenthesis`
[INFO] [stderr]   --> src/lexer.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 |     CloseParenthesis,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Semicolon`
[INFO] [stderr]   --> src/lexer.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 15 |     Semicolon,
[INFO] [stderr]    |     ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `IntegerKeyword`
[INFO] [stderr]   --> src/lexer.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 |     IntegerKeyword,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `ReturnKeyword`
[INFO] [stderr]   --> src/lexer.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 |     ReturnKeyword,
[INFO] [stderr]    |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Identifier`
[INFO] [stderr]   --> src/lexer.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 18 |     Identifier,
[INFO] [stderr]    |     ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `IntegerLiteral`
[INFO] [stderr]   --> src/lexer.rs:19:5
[INFO] [stderr]    |
[INFO] [stderr] 19 |     IntegerLiteral
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `name`
[INFO] [stderr]   --> src/lexer.rs:23:5
[INFO] [stderr]    |
[INFO] [stderr] 23 |     name: NameT,
[INFO] [stderr]    |     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `value`
[INFO] [stderr]   --> src/lexer.rs:24:5
[INFO] [stderr]    |
[INFO] [stderr] 24 |     value: &'a str
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `CloseBrace`
[INFO] [stderr]   --> src/lexer.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     CloseBrace,
[INFO] [stderr]    |     ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `OpenParenthesis`
[INFO] [stderr]   --> src/lexer.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 |     OpenParenthesis,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `CloseParenthesis`
[INFO] [stderr]   --> src/lexer.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 |     CloseParenthesis,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Semicolon`
[INFO] [stderr]   --> src/lexer.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 15 |     Semicolon,
[INFO] [stderr]    |     ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `IntegerKeyword`
[INFO] [stderr]   --> src/lexer.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 |     IntegerKeyword,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `ReturnKeyword`
[INFO] [stderr]   --> src/lexer.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 |     ReturnKeyword,
[INFO] [stderr]    |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Identifier`
[INFO] [stderr]   --> src/lexer.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 18 |     Identifier,
[INFO] [stderr]    |     ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `IntegerLiteral`
[INFO] [stderr]   --> src/lexer.rs:19:5
[INFO] [stderr]    |
[INFO] [stderr] 19 |     IntegerLiteral
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `name`
[INFO] [stderr]   --> src/lexer.rs:23:5
[INFO] [stderr]    |
[INFO] [stderr] 23 |     name: NameT,
[INFO] [stderr]    |     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `value`
[INFO] [stderr]   --> src/lexer.rs:24:5
[INFO] [stderr]    |
[INFO] [stderr] 24 |     value: &'a str
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.01s
[INFO] running `"docker" "inspect" "6f6fa523d458bbbd142553c6bd737a646d7fa9b8e51aba909f3bac02c6dcba93"`
[INFO] running `"docker" "rm" "-f" "6f6fa523d458bbbd142553c6bd737a646d7fa9b8e51aba909f3bac02c6dcba93"`
[INFO] [stdout] 6f6fa523d458bbbd142553c6bd737a646d7fa9b8e51aba909f3bac02c6dcba93