[INFO] updating cached repository ericrasmussen/rustexercises
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/ericrasmussen/rustexercises
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/ericrasmussen/rustexercises" "work/ex/beta-1.37-6/sources/1.36.0/gh/ericrasmussen/rustexercises"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/ericrasmussen/rustexercises'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/ericrasmussen/rustexercises" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/ericrasmussen/rustexercises"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/ericrasmussen/rustexercises'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] aced4cccab52952721df9378cb1d83d3cbdfb082
[INFO] sha for GitHub repo ericrasmussen/rustexercises: aced4cccab52952721df9378cb1d83d3cbdfb082
[INFO] validating manifest of ericrasmussen/rustexercises 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 ericrasmussen/rustexercises 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 ericrasmussen/rustexercises
[INFO] removed workspace from ericrasmussen/rustexercises
[INFO] finished frobbing ericrasmussen/rustexercises
[INFO] frobbed toml for ericrasmussen/rustexercises written to work/ex/beta-1.37-6/sources/1.36.0/gh/ericrasmussen/rustexercises/Cargo.toml
[INFO] started frobbing ericrasmussen/rustexercises
[INFO] removed workspace from ericrasmussen/rustexercises
[INFO] finished frobbing ericrasmussen/rustexercises
[INFO] frobbed toml for ericrasmussen/rustexercises written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/ericrasmussen/rustexercises/Cargo.toml
[INFO] crate ericrasmussen/rustexercises 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/ericrasmussen/rustexercises/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[INFO] the lockfile is outdated, regenerating it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 ericrasmussen/rustexercises 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-2/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/ericrasmussen/rustexercises:/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] f3672e0d8b183bf003bcd492f4d3d1aa97ca8d51a02a62bf446089a2c9a40410
[INFO] running `"docker" "start" "-a" "f3672e0d8b183bf003bcd492f4d3d1aa97ca8d51a02a62bf446089a2c9a40410"`
[INFO] [stderr]    Compiling exercises v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.35s
[INFO] running `"docker" "inspect" "f3672e0d8b183bf003bcd492f4d3d1aa97ca8d51a02a62bf446089a2c9a40410"`
[INFO] running `"docker" "rm" "-f" "f3672e0d8b183bf003bcd492f4d3d1aa97ca8d51a02a62bf446089a2c9a40410"`
[INFO] [stdout] f3672e0d8b183bf003bcd492f4d3d1aa97ca8d51a02a62bf446089a2c9a40410
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-2/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/ericrasmussen/rustexercises:/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] 102235fff6f8680e757456628972902f18ba3c7cab8eaea8403966264d7a8393
[INFO] running `"docker" "start" "-a" "102235fff6f8680e757456628972902f18ba3c7cab8eaea8403966264d7a8393"`
[INFO] [stderr]    Compiling exercises v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.63s
[INFO] running `"docker" "inspect" "102235fff6f8680e757456628972902f18ba3c7cab8eaea8403966264d7a8393"`
[INFO] running `"docker" "rm" "-f" "102235fff6f8680e757456628972902f18ba3c7cab8eaea8403966264d7a8393"`
[INFO] [stdout] 102235fff6f8680e757456628972902f18ba3c7cab8eaea8403966264d7a8393
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-2/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/ericrasmussen/rustexercises:/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] a03b379d333c09f36cf49bc7b8e760dca14f4062a7619a621618500fb91e8e0b
[INFO] running `"docker" "start" "-a" "a03b379d333c09f36cf49bc7b8e760dca14f4062a7619a621618500fb91e8e0b"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/exercises-34310110aa5c60c5
[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" "a03b379d333c09f36cf49bc7b8e760dca14f4062a7619a621618500fb91e8e0b"`
[INFO] running `"docker" "rm" "-f" "a03b379d333c09f36cf49bc7b8e760dca14f4062a7619a621618500fb91e8e0b"`
[INFO] [stdout] a03b379d333c09f36cf49bc7b8e760dca14f4062a7619a621618500fb91e8e0b