[INFO] cloning repository https://github.com/nelhage/iron-gollum
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/nelhage/iron-gollum" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnelhage%2Firon-gollum"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnelhage%2Firon-gollum'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 504c88b3d928478fce2c98b6a54d5b85e728e858
[INFO] checking nelhage/iron-gollum against master#2748a9fd93dd1a00a4521f4f16de5befbf77f6cd for pr-62262-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnelhage%2Firon-gollum" "/workspace/builds/worker-1/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/nelhage/iron-gollum on toolchain 2748a9fd93dd1a00a4521f4f16de5befbf77f6cd
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/nelhage/iron-gollum
[INFO] finished tweaking git repo https://github.com/nelhage/iron-gollum
[INFO] tweaked toml for git repo https://github.com/nelhage/iron-gollum written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/nelhage/iron-gollum already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "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] 52eeae4a96317464edb318c8b69e37f2cfc6f588cdd819a0c7ffeb5b00f1be4f
[INFO] running `"docker" "start" "-a" "52eeae4a96317464edb318c8b69e37f2cfc6f588cdd819a0c7ffeb5b00f1be4f"`
[INFO] [stderr]    Compiling pest_derive v1.0.7
[INFO] [stderr]     Checking iron-golem v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/parser.rs:44:17
[INFO] [stderr]    |
[INFO] [stderr] 44 |             let mut inner = pair.into_inner();
[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: variable does not need to be mutable
[INFO] [stderr]   --> src/parser.rs:76:17
[INFO] [stderr]    |
[INFO] [stderr] 76 |             let mut expr = *build(path, inner.next().unwrap());
[INFO] [stderr]    |                 ----^^^^
[INFO] [stderr]    |                 |
[INFO] [stderr]    |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/parser.rs:44:17
[INFO] [stderr]    |
[INFO] [stderr] 44 |             let mut inner = pair.into_inner();
[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: variable does not need to be mutable
[INFO] [stderr]   --> src/parser.rs:76:17
[INFO] [stderr]    |
[INFO] [stderr] 76 |             let mut expr = *build(path, inner.next().unwrap());
[INFO] [stderr]    |                 ----^^^^
[INFO] [stderr]    |                 |
[INFO] [stderr]    |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.57s
[INFO] running `"docker" "inspect" "52eeae4a96317464edb318c8b69e37f2cfc6f588cdd819a0c7ffeb5b00f1be4f"`
[INFO] running `"docker" "rm" "-f" "52eeae4a96317464edb318c8b69e37f2cfc6f588cdd819a0c7ffeb5b00f1be4f"`
[INFO] [stdout] 52eeae4a96317464edb318c8b69e37f2cfc6f588cdd819a0c7ffeb5b00f1be4f