[INFO] updating cached repository juliuscueto/rust_learning
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/juliuscueto/rust_learning
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/juliuscueto/rust_learning" "work/ex/beta-1.37-6/sources/1.36.0/gh/juliuscueto/rust_learning"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/juliuscueto/rust_learning'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/juliuscueto/rust_learning" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/juliuscueto/rust_learning"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/juliuscueto/rust_learning'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 7792d3b09021a89379d486b32408548cd3507c67
[INFO] sha for GitHub repo juliuscueto/rust_learning: 7792d3b09021a89379d486b32408548cd3507c67
[INFO] validating manifest of juliuscueto/rust_learning 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 juliuscueto/rust_learning 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 juliuscueto/rust_learning
[INFO] finished frobbing juliuscueto/rust_learning
[INFO] frobbed toml for juliuscueto/rust_learning written to work/ex/beta-1.37-6/sources/1.36.0/gh/juliuscueto/rust_learning/Cargo.toml
[INFO] started frobbing juliuscueto/rust_learning
[INFO] finished frobbing juliuscueto/rust_learning
[INFO] frobbed toml for juliuscueto/rust_learning written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/juliuscueto/rust_learning/Cargo.toml
[INFO] crate juliuscueto/rust_learning 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 juliuscueto/rust_learning 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-6/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/juliuscueto/rust_learning:/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] 9ad935f3a6be345346eeb5451840fd4aa31e6a43665b6afca8d7b6f140087908
[INFO] running `"docker" "start" "-a" "9ad935f3a6be345346eeb5451840fd4aa31e6a43665b6afca8d7b6f140087908"`
[INFO] [stderr]    Compiling learning v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.56s
[INFO] running `"docker" "inspect" "9ad935f3a6be345346eeb5451840fd4aa31e6a43665b6afca8d7b6f140087908"`
[INFO] running `"docker" "rm" "-f" "9ad935f3a6be345346eeb5451840fd4aa31e6a43665b6afca8d7b6f140087908"`
[INFO] [stdout] 9ad935f3a6be345346eeb5451840fd4aa31e6a43665b6afca8d7b6f140087908
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/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/juliuscueto/rust_learning:/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] 7f15cc0ee4aede15d8c1a86962a9f3fd94bfbaef0671bba0a04cf7ca8e32098a
[INFO] running `"docker" "start" "-a" "7f15cc0ee4aede15d8c1a86962a9f3fd94bfbaef0671bba0a04cf7ca8e32098a"`
[INFO] [stderr]    Compiling learning v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.83s
[INFO] running `"docker" "inspect" "7f15cc0ee4aede15d8c1a86962a9f3fd94bfbaef0671bba0a04cf7ca8e32098a"`
[INFO] running `"docker" "rm" "-f" "7f15cc0ee4aede15d8c1a86962a9f3fd94bfbaef0671bba0a04cf7ca8e32098a"`
[INFO] [stdout] 7f15cc0ee4aede15d8c1a86962a9f3fd94bfbaef0671bba0a04cf7ca8e32098a
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/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/juliuscueto/rust_learning:/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] 95e158971692232b72390078e3b76eb9db3d91ed437bde6d1adb4dbbfc98fdef
[INFO] running `"docker" "start" "-a" "95e158971692232b72390078e3b76eb9db3d91ed437bde6d1adb4dbbfc98fdef"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/learning-a9a5aef6ef0fa86e
[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" "95e158971692232b72390078e3b76eb9db3d91ed437bde6d1adb4dbbfc98fdef"`
[INFO] running `"docker" "rm" "-f" "95e158971692232b72390078e3b76eb9db3d91ed437bde6d1adb4dbbfc98fdef"`
[INFO] [stdout] 95e158971692232b72390078e3b76eb9db3d91ed437bde6d1adb4dbbfc98fdef