[INFO] cloning repository https://github.com/KuabeM/working-time-calculator
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/KuabeM/working-time-calculator" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKuabeM%2Fworking-time-calculator"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKuabeM%2Fworking-time-calculator'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] ae8e54c25caec34c3fbb549d8e2c321abe6004e0
[INFO] checking KuabeM/working-time-calculator against master#2748a9fd93dd1a00a4521f4f16de5befbf77f6cd for pr-62262-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKuabeM%2Fworking-time-calculator" "/workspace/builds/worker-10/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-10/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/KuabeM/working-time-calculator 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/KuabeM/working-time-calculator
[INFO] finished tweaking git repo https://github.com/KuabeM/working-time-calculator
[INFO] tweaked toml for git repo https://github.com/KuabeM/working-time-calculator written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] crate git repo https://github.com/KuabeM/working-time-calculator already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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] 7b5e255d087906ebce836a5a6d444bdce387c2b63e7b715b2ddb97bc6537004f
[INFO] running `"docker" "start" "-a" "7b5e255d087906ebce836a5a6d444bdce387c2b63e7b715b2ddb97bc6537004f"`
[INFO] [stderr]     Checking time v0.1.39
[INFO] [stderr]     Checking log v0.4.1
[INFO] [stderr]     Checking working-time-calc v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: value assigned to `content` is never read
[INFO] [stderr]    --> src/main.rs:117:13
[INFO] [stderr]     |
[INFO] [stderr] 117 |     let mut content = String::new();
[INFO] [stderr]     |             ^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:108:9
[INFO] [stderr]     |
[INFO] [stderr] 108 |     let mut content_opt = match read_file_to_string( &file_name) {
[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: value assigned to `content` is never read
[INFO] [stderr]    --> src/main.rs:117:13
[INFO] [stderr]     |
[INFO] [stderr] 117 |     let mut content = String::new();
[INFO] [stderr]     |             ^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:108:9
[INFO] [stderr]     |
[INFO] [stderr] 108 |     let mut content_opt = match read_file_to_string( &file_name) {
[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]     Finished dev [unoptimized + debuginfo] target(s) in 2.23s
[INFO] running `"docker" "inspect" "7b5e255d087906ebce836a5a6d444bdce387c2b63e7b715b2ddb97bc6537004f"`
[INFO] running `"docker" "rm" "-f" "7b5e255d087906ebce836a5a6d444bdce387c2b63e7b715b2ddb97bc6537004f"`
[INFO] [stdout] 7b5e255d087906ebce836a5a6d444bdce387c2b63e7b715b2ddb97bc6537004f