[INFO] updating cached repository dezgeg/nix-rebuild-stats
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/dezgeg/nix-rebuild-stats
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/dezgeg/nix-rebuild-stats" "work/ex/beta-1.37-6/sources/1.36.0/gh/dezgeg/nix-rebuild-stats"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/dezgeg/nix-rebuild-stats'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/dezgeg/nix-rebuild-stats" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/dezgeg/nix-rebuild-stats"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/dezgeg/nix-rebuild-stats'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 909b97402dad8ecc95d96dc685e4024476819496
[INFO] sha for GitHub repo dezgeg/nix-rebuild-stats: 909b97402dad8ecc95d96dc685e4024476819496
[INFO] validating manifest of dezgeg/nix-rebuild-stats on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of dezgeg/nix-rebuild-stats on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing dezgeg/nix-rebuild-stats
[INFO] finished frobbing dezgeg/nix-rebuild-stats
[INFO] frobbed toml for dezgeg/nix-rebuild-stats written to work/ex/beta-1.37-6/sources/1.36.0/gh/dezgeg/nix-rebuild-stats/Cargo.toml
[INFO] started frobbing dezgeg/nix-rebuild-stats
[INFO] finished frobbing dezgeg/nix-rebuild-stats
[INFO] frobbed toml for dezgeg/nix-rebuild-stats written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/dezgeg/nix-rebuild-stats/Cargo.toml
[INFO] crate dezgeg/nix-rebuild-stats already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing dezgeg/nix-rebuild-stats against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-5/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/dezgeg/nix-rebuild-stats:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+beta-2019-07-23" "build" "--frozen"`
[INFO] [stdout] b46cd8b6afc30dfcf08b998685c0a2d4d62191f5c35db083c88ae9c47cacd4bb
[INFO] running `"docker" "start" "-a" "b46cd8b6afc30dfcf08b998685c0a2d4d62191f5c35db083c88ae9c47cacd4bb"`
[INFO] [stderr]    Compiling from-ascii v0.0.1
[INFO] [stderr]    Compiling encoding_rs v0.5.0
[INFO] [stderr]    Compiling quick-xml v0.6.2
[INFO] [stderr]    Compiling nix-rebuild-stats v0.1.0 (/opt/crater/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]     Finished dev [unoptimized + debuginfo] target(s) in 9.67s
[INFO] running `"docker" "inspect" "b46cd8b6afc30dfcf08b998685c0a2d4d62191f5c35db083c88ae9c47cacd4bb"`
[INFO] running `"docker" "rm" "-f" "b46cd8b6afc30dfcf08b998685c0a2d4d62191f5c35db083c88ae9c47cacd4bb"`
[INFO] [stdout] b46cd8b6afc30dfcf08b998685c0a2d4d62191f5c35db083c88ae9c47cacd4bb
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-5/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/dezgeg/nix-rebuild-stats:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+beta-2019-07-23" "test" "--frozen" "--no-run"`
[INFO] [stdout] 20b43f40bd5d78bed368f4f497000289502c55b87ea00d4a9b996ace507fb352
[INFO] running `"docker" "start" "-a" "20b43f40bd5d78bed368f4f497000289502c55b87ea00d4a9b996ace507fb352"`
[INFO] [stderr]    Compiling nix-rebuild-stats v0.1.0 (/opt/crater/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]     Finished dev [unoptimized + debuginfo] target(s) in 0.64s
[INFO] running `"docker" "inspect" "20b43f40bd5d78bed368f4f497000289502c55b87ea00d4a9b996ace507fb352"`
[INFO] running `"docker" "rm" "-f" "20b43f40bd5d78bed368f4f497000289502c55b87ea00d4a9b996ace507fb352"`
[INFO] [stdout] 20b43f40bd5d78bed368f4f497000289502c55b87ea00d4a9b996ace507fb352
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-5/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/dezgeg/nix-rebuild-stats:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+beta-2019-07-23" "test" "--frozen"`
[INFO] [stdout] 16c314c28fc02b4c5f1471e7ac7f08c33d4c23e6700b6181a954b140690f3a77
[INFO] running `"docker" "start" "-a" "16c314c28fc02b4c5f1471e7ac7f08c33d4c23e6700b6181a954b140690f3a77"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.07s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/nix_rebuild_stats-92fefb359a0b1c1d
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "16c314c28fc02b4c5f1471e7ac7f08c33d4c23e6700b6181a954b140690f3a77"`
[INFO] running `"docker" "rm" "-f" "16c314c28fc02b4c5f1471e7ac7f08c33d4c23e6700b6181a954b140690f3a77"`
[INFO] [stdout] 16c314c28fc02b4c5f1471e7ac7f08c33d4c23e6700b6181a954b140690f3a77