[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-1.37-6/sources/1.36.0/gh/FoxMD/rust_lessons"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/FoxMD/rust_lessons'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/FoxMD/rust_lessons" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/FoxMD/rust_lessons"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/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 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of FoxMD/rust_lessons 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 FoxMD/rust_lessons
[INFO] finished frobbing FoxMD/rust_lessons
[INFO] frobbed toml for FoxMD/rust_lessons written to work/ex/beta-1.37-6/sources/1.36.0/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-1.37-6/sources/beta-2019-07-23/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" "+1.36.0" "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 FoxMD/rust_lessons 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-7/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/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" "+beta-2019-07-23" "build" "--frozen"`
[INFO] [stdout] 7c966005dcd8dc2b2f705a8d59b06e90dc8909c896d953b8243bb70eb4fcbd33
[INFO] running `"docker" "start" "-a" "7c966005dcd8dc2b2f705a8d59b06e90dc8909c896d953b8243bb70eb4fcbd33"`
[INFO] [stderr]    Compiling rust_lessons v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.69s
[INFO] running `"docker" "inspect" "7c966005dcd8dc2b2f705a8d59b06e90dc8909c896d953b8243bb70eb4fcbd33"`
[INFO] running `"docker" "rm" "-f" "7c966005dcd8dc2b2f705a8d59b06e90dc8909c896d953b8243bb70eb4fcbd33"`
[INFO] [stdout] 7c966005dcd8dc2b2f705a8d59b06e90dc8909c896d953b8243bb70eb4fcbd33
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-7/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/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" "+beta-2019-07-23" "test" "--frozen" "--no-run"`
[INFO] [stdout] b1fd767c606524021ba61e931bbaa07c28df70085f2f022ad5ca3312e8f1fe1a
[INFO] running `"docker" "start" "-a" "b1fd767c606524021ba61e931bbaa07c28df70085f2f022ad5ca3312e8f1fe1a"`
[INFO] [stderr]    Compiling rust_lessons v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.62s
[INFO] running `"docker" "inspect" "b1fd767c606524021ba61e931bbaa07c28df70085f2f022ad5ca3312e8f1fe1a"`
[INFO] running `"docker" "rm" "-f" "b1fd767c606524021ba61e931bbaa07c28df70085f2f022ad5ca3312e8f1fe1a"`
[INFO] [stdout] b1fd767c606524021ba61e931bbaa07c28df70085f2f022ad5ca3312e8f1fe1a
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-7/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/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" "+beta-2019-07-23" "test" "--frozen"`
[INFO] [stdout] 2c305b93e868d69281b110779854570165d3b9b44c432e6949c377a86c49bd4d
[INFO] running `"docker" "start" "-a" "2c305b93e868d69281b110779854570165d3b9b44c432e6949c377a86c49bd4d"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rust_lessons-3804f5eb9e7fad80
[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" "2c305b93e868d69281b110779854570165d3b9b44c432e6949c377a86c49bd4d"`
[INFO] running `"docker" "rm" "-f" "2c305b93e868d69281b110779854570165d3b9b44c432e6949c377a86c49bd4d"`
[INFO] [stdout] 2c305b93e868d69281b110779854570165d3b9b44c432e6949c377a86c49bd4d