[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-1.38-1/sources/1.37.0/gh/dezgeg/nix-rebuild-stats"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/dezgeg/nix-rebuild-stats'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/dezgeg/nix-rebuild-stats" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/dezgeg/nix-rebuild-stats"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/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 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of dezgeg/nix-rebuild-stats on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "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-1.38-1/sources/1.37.0/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-1.38-1/sources/beta-2019-08-13/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" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing dezgeg/nix-rebuild-stats against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/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-2019-08-13" "build" "--frozen"`
[INFO] [stdout] af33869dd33e980bc93a853a2e67f303b5a9a4a20b3fcb7c51730896f8a8fc92
[INFO] running `"docker" "start" "-a" "af33869dd33e980bc93a853a2e67f303b5a9a4a20b3fcb7c51730896f8a8fc92"`
[INFO] [stderr]    Compiling gcc v0.3.45
[INFO] [stderr]    Compiling backtrace v0.3.0
[INFO] [stderr]    Compiling from-ascii v0.0.1
[INFO] [stderr]    Compiling rustc-serialize v0.3.23
[INFO] [stderr]    Compiling encoding_rs v0.5.0
[INFO] [stderr]    Compiling backtrace-sys v0.1.10
[INFO] [stderr]    Compiling error-chain v0.10.0
[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 29.03s
[INFO] running `"docker" "inspect" "af33869dd33e980bc93a853a2e67f303b5a9a4a20b3fcb7c51730896f8a8fc92"`
[INFO] running `"docker" "rm" "-f" "af33869dd33e980bc93a853a2e67f303b5a9a4a20b3fcb7c51730896f8a8fc92"`
[INFO] [stdout] af33869dd33e980bc93a853a2e67f303b5a9a4a20b3fcb7c51730896f8a8fc92
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/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-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] aedd8ffed1f7f5ebd0a445d168abbe20230068c7d21e845764700d1450cd2414
[INFO] running `"docker" "start" "-a" "aedd8ffed1f7f5ebd0a445d168abbe20230068c7d21e845764700d1450cd2414"`
[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 1.00s
[INFO] running `"docker" "inspect" "aedd8ffed1f7f5ebd0a445d168abbe20230068c7d21e845764700d1450cd2414"`
[INFO] running `"docker" "rm" "-f" "aedd8ffed1f7f5ebd0a445d168abbe20230068c7d21e845764700d1450cd2414"`
[INFO] [stdout] aedd8ffed1f7f5ebd0a445d168abbe20230068c7d21e845764700d1450cd2414
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/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-2019-08-13" "test" "--frozen"`
[INFO] [stdout] 955903f68a1cc201a0764c9171c90680fbad2905792fb8cb38212fd62280256f
[INFO] running `"docker" "start" "-a" "955903f68a1cc201a0764c9171c90680fbad2905792fb8cb38212fd62280256f"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.09s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/nix_rebuild_stats-96db0c34eedacb39
[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" "955903f68a1cc201a0764c9171c90680fbad2905792fb8cb38212fd62280256f"`
[INFO] running `"docker" "rm" "-f" "955903f68a1cc201a0764c9171c90680fbad2905792fb8cb38212fd62280256f"`
[INFO] [stdout] 955903f68a1cc201a0764c9171c90680fbad2905792fb8cb38212fd62280256f