[INFO] updating cached repository droundy/rust-student-pairs
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/droundy/rust-student-pairs
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/droundy/rust-student-pairs" "work/ex/beta-1.37-6/sources/1.36.0/gh/droundy/rust-student-pairs"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/droundy/rust-student-pairs'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/droundy/rust-student-pairs" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/droundy/rust-student-pairs"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/droundy/rust-student-pairs'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 71c5acdacdf8b51fede27b131248c0af9a89bbea
[INFO] sha for GitHub repo droundy/rust-student-pairs: 71c5acdacdf8b51fede27b131248c0af9a89bbea
[INFO] validating manifest of droundy/rust-student-pairs 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 droundy/rust-student-pairs 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 droundy/rust-student-pairs
[INFO] finished frobbing droundy/rust-student-pairs
[INFO] frobbed toml for droundy/rust-student-pairs written to work/ex/beta-1.37-6/sources/1.36.0/gh/droundy/rust-student-pairs/Cargo.toml
[INFO] started frobbing droundy/rust-student-pairs
[INFO] finished frobbing droundy/rust-student-pairs
[INFO] frobbed toml for droundy/rust-student-pairs written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/droundy/rust-student-pairs/Cargo.toml
[INFO] crate droundy/rust-student-pairs 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 droundy/rust-student-pairs against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-7/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/droundy/rust-student-pairs:/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] 63a5bc9f9be313f61f37a68b89e7eddce86b1d942b1158408a4d942e20c2c602
[INFO] running `"docker" "start" "-a" "63a5bc9f9be313f61f37a68b89e7eddce86b1d942b1158408a4d942e20c2c602"`
[INFO] [stderr]    Compiling memchr v2.0.2
[INFO] [stderr]    Compiling thread-id v3.3.0
[INFO] [stderr]    Compiling log v0.4.4
[INFO] [stderr]    Compiling filetime v0.1.15
[INFO] [stderr]    Compiling brotli-sys v0.2.1
[INFO] [stderr]    Compiling tinyset v0.2.2
[INFO] [stderr]    Compiling base64 v0.7.0
[INFO] [stderr]    Compiling buf_redux v0.6.3
[INFO] [stderr]    Compiling toml v0.4.6
[INFO] [stderr]    Compiling serde_yaml v0.7.5
[INFO] [stderr]    Compiling uuid v0.1.18
[INFO] [stderr]    Compiling thread_local v0.3.3
[INFO] [stderr]    Compiling phf_shared v0.7.23
[INFO] [stderr]    Compiling chrono v0.4.6
[INFO] [stderr]    Compiling enum_primitive v0.1.1
[INFO] [stderr]    Compiling nom v4.0.0
[INFO] [stderr]    Compiling twoway v0.1.8
[INFO] [stderr]    Compiling log v0.3.9
[INFO] [stderr]    Compiling gzip-header v0.1.2
[INFO] [stderr]    Compiling url v0.2.38
[INFO] [stderr]    Compiling phf_generator v0.7.23
[INFO] [stderr]    Compiling phf v0.7.23
[INFO] [stderr]    Compiling state v0.4.1
[INFO] [stderr]    Compiling chrono v0.2.25
[INFO] [stderr]    Compiling mime v0.2.6
[INFO] [stderr]    Compiling deflate v0.7.18
[INFO] [stderr]    Compiling phf_codegen v0.7.23
[INFO] [stderr]    Compiling internment v0.3.6
[INFO] [stderr]    Compiling mime_guess v1.8.6
[INFO] [stderr]    Compiling askama_shared v0.7.1
[INFO] [stderr]    Compiling brotli2 v0.2.2
[INFO] [stderr]    Compiling tiny_http v0.5.9
[INFO] [stderr]    Compiling askama_derive v0.7.1
[INFO] [stderr]    Compiling multipart v0.13.6
[INFO] [stderr]    Compiling rouille v2.1.0
[INFO] [stderr]    Compiling askama v0.7.1
[INFO] [stderr]    Compiling rust-student-pairs v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 08s
[INFO] running `"docker" "inspect" "63a5bc9f9be313f61f37a68b89e7eddce86b1d942b1158408a4d942e20c2c602"`
[INFO] running `"docker" "rm" "-f" "63a5bc9f9be313f61f37a68b89e7eddce86b1d942b1158408a4d942e20c2c602"`
[INFO] [stdout] 63a5bc9f9be313f61f37a68b89e7eddce86b1d942b1158408a4d942e20c2c602
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-7/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/droundy/rust-student-pairs:/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" "+1.36.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] bf500822c66951e0c95970f69a52b3b06a419180ad949f90aeeaec8dfd6cd308
[INFO] running `"docker" "start" "-a" "bf500822c66951e0c95970f69a52b3b06a419180ad949f90aeeaec8dfd6cd308"`
[INFO] [stderr]    Compiling rust-student-pairs v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.22s
[INFO] running `"docker" "inspect" "bf500822c66951e0c95970f69a52b3b06a419180ad949f90aeeaec8dfd6cd308"`
[INFO] running `"docker" "rm" "-f" "bf500822c66951e0c95970f69a52b3b06a419180ad949f90aeeaec8dfd6cd308"`
[INFO] [stdout] bf500822c66951e0c95970f69a52b3b06a419180ad949f90aeeaec8dfd6cd308
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-7/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/droundy/rust-student-pairs:/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" "+1.36.0" "test" "--frozen"`
[INFO] [stdout] 36740fb451ab4da17c1a9ea8125b3c3e4a79e9424a33dc03764624a41c8df1a4
[INFO] running `"docker" "start" "-a" "36740fb451ab4da17c1a9ea8125b3c3e4a79e9424a33dc03764624a41c8df1a4"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.15s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rust_student_pairs-fb91eddd131f8007
[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" "36740fb451ab4da17c1a9ea8125b3c3e4a79e9424a33dc03764624a41c8df1a4"`
[INFO] running `"docker" "rm" "-f" "36740fb451ab4da17c1a9ea8125b3c3e4a79e9424a33dc03764624a41c8df1a4"`
[INFO] [stdout] 36740fb451ab4da17c1a9ea8125b3c3e4a79e9424a33dc03764624a41c8df1a4