[INFO] updating cached repository https://github.com/dezgeg/nix-rebuild-stats
[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] 909b97402dad8ecc95d96dc685e4024476819496
[INFO] checking dezgeg/nix-rebuild-stats against master#b61e69433951e31f7bd746e22f516a48ad41623b for prs-64470-and-65389
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdezgeg%2Fnix-rebuild-stats" "/workspace/builds/worker-14/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/dezgeg/nix-rebuild-stats on toolchain b61e69433951e31f7bd746e22f516a48ad41623b
[INFO] running `"/workspace/cargo-home/bin/cargo" "+b61e69433951e31f7bd746e22f516a48ad41623b" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/dezgeg/nix-rebuild-stats
[INFO] finished tweaking git repo https://github.com/dezgeg/nix-rebuild-stats
[INFO] tweaked toml for git repo https://github.com/dezgeg/nix-rebuild-stats written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate git repo https://github.com/dezgeg/nix-rebuild-stats already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+b61e69433951e31f7bd746e22f516a48ad41623b" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "+b61e69433951e31f7bd746e22f516a48ad41623b" "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] f49fedbe2e8f62368d44aa3b986e2923391aafd6df22f12cb2309f601890baf9
[INFO] running `"docker" "start" "-a" "f49fedbe2e8f62368d44aa3b986e2923391aafd6df22f12cb2309f601890baf9"`
[INFO] [stderr]     Checking from-ascii v0.0.1
[INFO] [stderr]     Checking encoding_rs v0.5.0
[INFO] [stderr]     Checking backtrace-sys v0.1.10
[INFO] [stderr]     Checking backtrace v0.3.0
[INFO] [stderr]     Checking error-chain v0.10.0
[INFO] [stderr]     Checking quick-xml v0.6.2
[INFO] [stderr]     Checking nix-rebuild-stats v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused variable: `drv_paths`
[INFO] [stderr]   --> src/main.rs:40:19
[INFO] [stderr]    |
[INFO] [stderr] 40 | fn build_dep_tree(drv_paths: Vec<String>) -> HashMap<String, Vec<String>> {
[INFO] [stderr]    |                   ^^^^^^^^^ help: consider prefixing with an underscore: `_drv_paths`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `drv_paths`
[INFO] [stderr]   --> src/main.rs:40:19
[INFO] [stderr]    |
[INFO] [stderr] 40 | fn build_dep_tree(drv_paths: Vec<String>) -> HashMap<String, Vec<String>> {
[INFO] [stderr]    |                   ^^^^^^^^^ help: consider prefixing with an underscore: `_drv_paths`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.68s
[INFO] running `"docker" "inspect" "f49fedbe2e8f62368d44aa3b986e2923391aafd6df22f12cb2309f601890baf9"`
[INFO] running `"docker" "rm" "-f" "f49fedbe2e8f62368d44aa3b986e2923391aafd6df22f12cb2309f601890baf9"`
[INFO] [stdout] f49fedbe2e8f62368d44aa3b986e2923391aafd6df22f12cb2309f601890baf9