[INFO] updating cached repository https://github.com/clio-lang/rio
[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] 2dca4acf82421ff76c789733d11ecadbc2678356
[INFO] checking clio-lang/rio against try#e4dba30b9b475d8750370c4dfb49b6541990904d for pr-71393
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fclio-lang%2Frio" "/workspace/builds/worker-3/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/clio-lang/rio on toolchain e4dba30b9b475d8750370c4dfb49b6541990904d
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/clio-lang/rio
[INFO] finished tweaking git repo https://github.com/clio-lang/rio
[INFO] tweaked toml for git repo https://github.com/clio-lang/rio written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/clio-lang/rio already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "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] b07e6ca930339d6f4d8da24809d687eed9891961fdbe2fb33bee55a15fcc3544
[INFO] running `"docker" "start" "-a" "b07e6ca930339d6f4d8da24809d687eed9891961fdbe2fb33bee55a15fcc3544"`
[INFO] [stderr]     Checking regex-syntax v0.6.14
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]     Checking memchr v2.3.0
[INFO] [stderr]     Checking aho-corasick v0.7.8
[INFO] [stderr]     Checking regex v1.3.4
[INFO] [stderr]     Checking rio v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `std::io::Error`
[INFO] [stderr]  --> src/core/lexer.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::io::Error;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::io::Error`
[INFO] [stderr]  --> src/core/lexer.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::io::Error;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/core/lexer.rs:18:13
[INFO] [stderr]    |
[INFO] [stderr] 18 |         let mut tokens: Vec<String> = Vec::new();
[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: enum is never used: `Expression`
[INFO] [stderr]  --> src/core/expression.rs:3:10
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub enum Expression {
[INFO] [stderr]   |          ^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `is_linebreak`
[INFO] [stderr]   --> src/core/expression.rs:15:8
[INFO] [stderr]    |
[INFO] [stderr] 15 | pub fn is_linebreak(input: &str) -> bool {
[INFO] [stderr]    |        ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/core/lexer.rs:18:13
[INFO] [stderr]    |
[INFO] [stderr] 18 |         let mut tokens: Vec<String> = Vec::new();
[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: enum is never used: `Expression`
[INFO] [stderr]  --> src/core/expression.rs:3:10
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub enum Expression {
[INFO] [stderr]   |          ^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `is_linebreak`
[INFO] [stderr]   --> src/core/expression.rs:15:8
[INFO] [stderr]    |
[INFO] [stderr] 15 | pub fn is_linebreak(input: &str) -> bool {
[INFO] [stderr]    |        ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 4 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 4 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 9.42s
[INFO] running `"docker" "inspect" "b07e6ca930339d6f4d8da24809d687eed9891961fdbe2fb33bee55a15fcc3544"`
[INFO] running `"docker" "rm" "-f" "b07e6ca930339d6f4d8da24809d687eed9891961fdbe2fb33bee55a15fcc3544"`
[INFO] [stdout] b07e6ca930339d6f4d8da24809d687eed9891961fdbe2fb33bee55a15fcc3544