[INFO] updating cached repository FoxMD/rust_lessons
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/FoxMD/rust_lessons
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/FoxMD/rust_lessons" "work/ex/beta-1.38-1/sources/1.37.0/gh/FoxMD/rust_lessons"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/FoxMD/rust_lessons'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/FoxMD/rust_lessons" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/FoxMD/rust_lessons"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/FoxMD/rust_lessons'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 87610449e5bf29b08336fb32f6763c8263c6f5a5
[INFO] sha for GitHub repo FoxMD/rust_lessons: 87610449e5bf29b08336fb32f6763c8263c6f5a5
[INFO] validating manifest of FoxMD/rust_lessons 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 FoxMD/rust_lessons 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 FoxMD/rust_lessons
[INFO] finished frobbing FoxMD/rust_lessons
[INFO] frobbed toml for FoxMD/rust_lessons written to work/ex/beta-1.38-1/sources/1.37.0/gh/FoxMD/rust_lessons/Cargo.toml
[INFO] started frobbing FoxMD/rust_lessons
[INFO] finished frobbing FoxMD/rust_lessons
[INFO] frobbed toml for FoxMD/rust_lessons written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/FoxMD/rust_lessons/Cargo.toml
[INFO] crate FoxMD/rust_lessons 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 FoxMD/rust_lessons against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/FoxMD/rust_lessons:/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] f84cdad689198ac0a275ac177521925e4f0dc87051057c3ba3eaed3a7bef7b87
[INFO] running `"docker" "start" "-a" "f84cdad689198ac0a275ac177521925e4f0dc87051057c3ba3eaed3a7bef7b87"`
[INFO] [stderr]    Compiling rust_lessons v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.55s
[INFO] running `"docker" "inspect" "f84cdad689198ac0a275ac177521925e4f0dc87051057c3ba3eaed3a7bef7b87"`
[INFO] running `"docker" "rm" "-f" "f84cdad689198ac0a275ac177521925e4f0dc87051057c3ba3eaed3a7bef7b87"`
[INFO] [stdout] f84cdad689198ac0a275ac177521925e4f0dc87051057c3ba3eaed3a7bef7b87
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/FoxMD/rust_lessons:/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" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] f363d8b073f190196724fc8ce63b778747f56e951e5e9553e8ea0463a0c9ceea
[INFO] running `"docker" "start" "-a" "f363d8b073f190196724fc8ce63b778747f56e951e5e9553e8ea0463a0c9ceea"`
[INFO] [stderr]    Compiling rust_lessons v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.73s
[INFO] running `"docker" "inspect" "f363d8b073f190196724fc8ce63b778747f56e951e5e9553e8ea0463a0c9ceea"`
[INFO] running `"docker" "rm" "-f" "f363d8b073f190196724fc8ce63b778747f56e951e5e9553e8ea0463a0c9ceea"`
[INFO] [stdout] f363d8b073f190196724fc8ce63b778747f56e951e5e9553e8ea0463a0c9ceea
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/FoxMD/rust_lessons:/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" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] 2797ce07777b642e0c2807d137a0e0b89b7c4449b934d46f18281f7b7b7ea784
[INFO] running `"docker" "start" "-a" "2797ce07777b642e0c2807d137a0e0b89b7c4449b934d46f18281f7b7b7ea784"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rust_lessons-c6a580624e50bbe0
[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" "2797ce07777b642e0c2807d137a0e0b89b7c4449b934d46f18281f7b7b7ea784"`
[INFO] running `"docker" "rm" "-f" "2797ce07777b642e0c2807d137a0e0b89b7c4449b934d46f18281f7b7b7ea784"`
[INFO] [stdout] 2797ce07777b642e0c2807d137a0e0b89b7c4449b934d46f18281f7b7b7ea784