[INFO] cloning repository https://github.com/bmollot/letter-c
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/bmollot/letter-c" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbmollot%2Fletter-c"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbmollot%2Fletter-c'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] edb13f1cf18788bcee1810a9cc2b8a7d0d49db84
[INFO] checking bmollot/letter-c against master#6250d56355d72264ece721e8d0dc95b16a6824b1 for pr-68350
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbmollot%2Fletter-c" "/workspace/builds/worker-6/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/bmollot/letter-c on toolchain 6250d56355d72264ece721e8d0dc95b16a6824b1
[INFO] running `"/workspace/cargo-home/bin/cargo" "+6250d56355d72264ece721e8d0dc95b16a6824b1" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/bmollot/letter-c
[INFO] finished tweaking git repo https://github.com/bmollot/letter-c
[INFO] tweaked toml for git repo https://github.com/bmollot/letter-c written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/bmollot/letter-c already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+6250d56355d72264ece721e8d0dc95b16a6824b1" "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-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+6250d56355d72264ece721e8d0dc95b16a6824b1" "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] 2b67ec783bf2d293377272080f492135242f25a69e760f27f6868fd08e69725a
[INFO] running `"docker" "start" "-a" "2b67ec783bf2d293377272080f492135242f25a69e760f27f6868fd08e69725a"`
[INFO] [stderr]     Checking letter-c v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: variant is never constructed: `QuarterDot`
[INFO] [stderr]   --> src/lib.rs:54:5
[INFO] [stderr]    |
[INFO] [stderr] 54 |     QuarterDot,
[INFO] [stderr]    |     ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `MEGALOVANIA_RAW`
[INFO] [stderr]    --> src/lib.rs:245:5
[INFO] [stderr]     |
[INFO] [stderr] 245 | /     const MEGALOVANIA_RAW: &'static str = "5|--d---------------d-------|
[INFO] [stderr] 246 | | 4|dd--a--G-g-f-dfgcc--a--G-g|
[INFO] [stderr] 247 | |
[INFO] [stderr] 248 | | 5|--------d---------------d-|
[INFO] [stderr] ...   |
[INFO] [stderr] 351 | | 5|------------d-------------|
[INFO] [stderr] 352 | | 4|-G-g-f-dfgcc--a--G-g-f-dfg|";
[INFO] [stderr]     | |_______________________________^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `QuarterDot`
[INFO] [stderr]   --> src/lib.rs:54:5
[INFO] [stderr]    |
[INFO] [stderr] 54 |     QuarterDot,
[INFO] [stderr]    |     ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.54s
[INFO] running `"docker" "inspect" "2b67ec783bf2d293377272080f492135242f25a69e760f27f6868fd08e69725a"`
[INFO] running `"docker" "rm" "-f" "2b67ec783bf2d293377272080f492135242f25a69e760f27f6868fd08e69725a"`
[INFO] [stdout] 2b67ec783bf2d293377272080f492135242f25a69e760f27f6868fd08e69725a