[INFO] updating cached repository cdelauder/learn_rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/cdelauder/learn_rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/cdelauder/learn_rust" "work/ex/beta-1.37-6/sources/1.36.0/gh/cdelauder/learn_rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/cdelauder/learn_rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/cdelauder/learn_rust" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/cdelauder/learn_rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/cdelauder/learn_rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 4c544408049cc7a6e43c41a36515c144eedb034c
[INFO] sha for GitHub repo cdelauder/learn_rust: 4c544408049cc7a6e43c41a36515c144eedb034c
[INFO] validating manifest of cdelauder/learn_rust 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 cdelauder/learn_rust 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 cdelauder/learn_rust
[INFO] finished frobbing cdelauder/learn_rust
[INFO] frobbed toml for cdelauder/learn_rust written to work/ex/beta-1.37-6/sources/1.36.0/gh/cdelauder/learn_rust/Cargo.toml
[INFO] started frobbing cdelauder/learn_rust
[INFO] finished frobbing cdelauder/learn_rust
[INFO] frobbed toml for cdelauder/learn_rust written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/cdelauder/learn_rust/Cargo.toml
[INFO] crate cdelauder/learn_rust 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] [stderr] error: the lock file /mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/cdelauder/learn_rust/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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 cdelauder/learn_rust 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-4/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/cdelauder/learn_rust:/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] a5725684c35a70f7072be1051f439a8a7e3bde30e73c2ba54990996e384322ef
[INFO] running `"docker" "start" "-a" "a5725684c35a70f7072be1051f439a8a7e3bde30e73c2ba54990996e384322ef"`
[INFO] [stderr]    Compiling hello_world v0.0.1 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.76s
[INFO] running `"docker" "inspect" "a5725684c35a70f7072be1051f439a8a7e3bde30e73c2ba54990996e384322ef"`
[INFO] running `"docker" "rm" "-f" "a5725684c35a70f7072be1051f439a8a7e3bde30e73c2ba54990996e384322ef"`
[INFO] [stdout] a5725684c35a70f7072be1051f439a8a7e3bde30e73c2ba54990996e384322ef
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/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/cdelauder/learn_rust:/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] 594179d0b36276226d5e103413643a1d1fdbe1d095f650b1c896b459fb4dca7f
[INFO] running `"docker" "start" "-a" "594179d0b36276226d5e103413643a1d1fdbe1d095f650b1c896b459fb4dca7f"`
[INFO] [stderr]    Compiling hello_world v0.0.1 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.91s
[INFO] running `"docker" "inspect" "594179d0b36276226d5e103413643a1d1fdbe1d095f650b1c896b459fb4dca7f"`
[INFO] running `"docker" "rm" "-f" "594179d0b36276226d5e103413643a1d1fdbe1d095f650b1c896b459fb4dca7f"`
[INFO] [stdout] 594179d0b36276226d5e103413643a1d1fdbe1d095f650b1c896b459fb4dca7f
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/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/cdelauder/learn_rust:/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] 5db9237e5fb1d34732d62bac7580f2e5e62f2efc932d1b974393a51724c5b6cb
[INFO] running `"docker" "start" "-a" "5db9237e5fb1d34732d62bac7580f2e5e62f2efc932d1b974393a51724c5b6cb"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/hello_world-a926f8aed4f74dc4
[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" "5db9237e5fb1d34732d62bac7580f2e5e62f2efc932d1b974393a51724c5b6cb"`
[INFO] running `"docker" "rm" "-f" "5db9237e5fb1d34732d62bac7580f2e5e62f2efc932d1b974393a51724c5b6cb"`
[INFO] [stdout] 5db9237e5fb1d34732d62bac7580f2e5e62f2efc932d1b974393a51724c5b6cb