[INFO] updating cached repository huonw/revisiting-knn
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/huonw/revisiting-knn
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/huonw/revisiting-knn" "work/ex/beta-1.38-1/sources/1.37.0/gh/huonw/revisiting-knn"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/huonw/revisiting-knn'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/huonw/revisiting-knn" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/huonw/revisiting-knn"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/huonw/revisiting-knn'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 219ad78a9b15554b10d08c4e626e11e09256b8dd
[INFO] sha for GitHub repo huonw/revisiting-knn: 219ad78a9b15554b10d08c4e626e11e09256b8dd
[INFO] validating manifest of huonw/revisiting-knn 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 huonw/revisiting-knn 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 huonw/revisiting-knn
[INFO] finished frobbing huonw/revisiting-knn
[INFO] frobbed toml for huonw/revisiting-knn written to work/ex/beta-1.38-1/sources/1.37.0/gh/huonw/revisiting-knn/Cargo.toml
[INFO] started frobbing huonw/revisiting-knn
[INFO] finished frobbing huonw/revisiting-knn
[INFO] frobbed toml for huonw/revisiting-knn written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/huonw/revisiting-knn/Cargo.toml
[INFO] crate huonw/revisiting-knn 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/huonw/revisiting-knn/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[INFO] the lockfile is outdated, regenerating it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] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing huonw/revisiting-knn 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-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/huonw/revisiting-knn:/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] 98b87327a631f62d0f3a85c10e53bb581da5d84d127bb306c21d5c17fe97cf8e
[INFO] running `"docker" "start" "-a" "98b87327a631f62d0f3a85c10e53bb581da5d84d127bb306c21d5c17fe97cf8e"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling crossbeam v0.1.6
[INFO] [stderr] error[E0512]: cannot transmute between types of different sizes, or dependently-sized types
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/crossbeam-0.1.6/src/sync/seg_queue.rs:34:29
[INFO] [stderr]    |
[INFO] [stderr] 34 |             ready: unsafe { mem::transmute([0usize; SEG_SIZE]) },
[INFO] [stderr]    |                             ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: source type: `[usize; 32]` (2048 bits)
[INFO] [stderr]    = note: target type: `[std::sync::atomic::AtomicBool; 32]` (256 bits)
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0512`.
[INFO] [stderr] error: Could not compile `crossbeam`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "98b87327a631f62d0f3a85c10e53bb581da5d84d127bb306c21d5c17fe97cf8e"`
[INFO] running `"docker" "rm" "-f" "98b87327a631f62d0f3a85c10e53bb581da5d84d127bb306c21d5c17fe97cf8e"`
[INFO] [stdout] 98b87327a631f62d0f3a85c10e53bb581da5d84d127bb306c21d5c17fe97cf8e