[INFO] updating cached repository ChaosKit/reactor
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/ChaosKit/reactor
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/ChaosKit/reactor" "work/ex/beta-1.38-1/sources/1.37.0/gh/ChaosKit/reactor"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/ChaosKit/reactor'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/ChaosKit/reactor" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ChaosKit/reactor"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ChaosKit/reactor'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 6814a5379faa17b0276fcc4e51445150694c1626
[INFO] sha for GitHub repo ChaosKit/reactor: 6814a5379faa17b0276fcc4e51445150694c1626
[INFO] validating manifest of ChaosKit/reactor 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 ChaosKit/reactor 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 ChaosKit/reactor
[INFO] finished frobbing ChaosKit/reactor
[INFO] frobbed toml for ChaosKit/reactor written to work/ex/beta-1.38-1/sources/1.37.0/gh/ChaosKit/reactor/Cargo.toml
[INFO] started frobbing ChaosKit/reactor
[INFO] finished frobbing ChaosKit/reactor
[INFO] frobbed toml for ChaosKit/reactor written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ChaosKit/reactor/Cargo.toml
[INFO] crate ChaosKit/reactor 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/ChaosKit/reactor/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[INFO] the lockfile is outdated, regenerating it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] [stderr]     Blocking waiting for file lock on package cache
[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] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing ChaosKit/reactor against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ChaosKit/reactor:/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-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 09e24aff16e38e4af1b1c5c8bcc82de6a474340a443986f76cd9986e2cefe039
[INFO] running `"docker" "start" "-a" "09e24aff16e38e4af1b1c5c8bcc82de6a474340a443986f76cd9986e2cefe039"`
[INFO] [stderr]    Compiling bitflags v0.3.3
[INFO] [stderr]    Compiling inflate v0.1.1
[INFO] [stderr]    Compiling lzw v0.9.0
[INFO] [stderr]    Compiling crossbeam v0.1.6
[INFO] [stderr]    Compiling capnp v0.5.4
[INFO] [stderr]    Compiling flate2 v0.2.20
[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]    Compiling gif v0.6.0
[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] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] warning[E0502]: cannot borrow `*reff` as immutable because it is also borrowed as mutable
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/capnp-0.5.4/src/private/layout.rs:639:47
[INFO] [stderr]     |
[INFO] [stderr] 639 |         let ptr = try!(follow_fars(&mut reff, (*reff).target(), &mut segment));
[INFO] [stderr]     |                        ----------- ---------  ^^^^^^^ immutable borrow occurs here
[INFO] [stderr]     |                        |           |
[INFO] [stderr]     |                        |           mutable borrow occurs here
[INFO] [stderr]     |                        mutable borrow later used by call
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[INFO] [stderr]     = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[INFO] [stderr]     = note: for more information, try `rustc --explain E0729`
[INFO] [stderr] 
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "09e24aff16e38e4af1b1c5c8bcc82de6a474340a443986f76cd9986e2cefe039"`
[INFO] running `"docker" "rm" "-f" "09e24aff16e38e4af1b1c5c8bcc82de6a474340a443986f76cd9986e2cefe039"`
[INFO] [stdout] 09e24aff16e38e4af1b1c5c8bcc82de6a474340a443986f76cd9986e2cefe039