[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-1.38-1/sources/1.37.0/gh/ericrasmussen/rustexercises"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/ericrasmussen/rustexercises'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/ericrasmussen/rustexercises" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ericrasmussen/rustexercises"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/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 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of ericrasmussen/rustexercises 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 ericrasmussen/rustexercises
[INFO] removed workspace from ericrasmussen/rustexercises
[INFO] finished frobbing ericrasmussen/rustexercises
[INFO] frobbed toml for ericrasmussen/rustexercises written to work/ex/beta-1.38-1/sources/1.37.0/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-1.38-1/sources/beta-2019-08-13/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" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] error: the lock file /mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/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" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing ericrasmussen/rustexercises 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-3/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] f87aea1401e8cc6c677dd7aa36fc46803bec69ba28838240f768aacbf1159dc7
[INFO] running `"docker" "start" "-a" "f87aea1401e8cc6c677dd7aa36fc46803bec69ba28838240f768aacbf1159dc7"`
[INFO] [stderr]    Compiling exercises v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.48s
[INFO] running `"docker" "inspect" "f87aea1401e8cc6c677dd7aa36fc46803bec69ba28838240f768aacbf1159dc7"`
[INFO] running `"docker" "rm" "-f" "f87aea1401e8cc6c677dd7aa36fc46803bec69ba28838240f768aacbf1159dc7"`
[INFO] [stdout] f87aea1401e8cc6c677dd7aa36fc46803bec69ba28838240f768aacbf1159dc7
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/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" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] ac674f19913ed5ba62f04a199a357c1881ab1cd43c40a827afeb714f649065ab
[INFO] running `"docker" "start" "-a" "ac674f19913ed5ba62f04a199a357c1881ab1cd43c40a827afeb714f649065ab"`
[INFO] [stderr]    Compiling exercises v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.50s
[INFO] running `"docker" "inspect" "ac674f19913ed5ba62f04a199a357c1881ab1cd43c40a827afeb714f649065ab"`
[INFO] running `"docker" "rm" "-f" "ac674f19913ed5ba62f04a199a357c1881ab1cd43c40a827afeb714f649065ab"`
[INFO] [stdout] ac674f19913ed5ba62f04a199a357c1881ab1cd43c40a827afeb714f649065ab
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/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" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] cbfc4f2f3d1d1fd89b48aabc0180766ceb63854d9590c2a6a27089338c3003a9
[INFO] running `"docker" "start" "-a" "cbfc4f2f3d1d1fd89b48aabc0180766ceb63854d9590c2a6a27089338c3003a9"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/exercises-8016f77199655618
[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" "cbfc4f2f3d1d1fd89b48aabc0180766ceb63854d9590c2a6a27089338c3003a9"`
[INFO] running `"docker" "rm" "-f" "cbfc4f2f3d1d1fd89b48aabc0180766ceb63854d9590c2a6a27089338c3003a9"`
[INFO] [stdout] cbfc4f2f3d1d1fd89b48aabc0180766ceb63854d9590c2a6a27089338c3003a9