[INFO] crate libaio 0.0.1 is already in cache
[INFO] extracting crate libaio 0.0.1 into work/ex/beta-1.38-1/sources/1.37.0/reg/libaio/0.0.1
[INFO] extracting crate libaio 0.0.1 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/libaio/0.0.1
[INFO] validating manifest of libaio-0.0.1 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 libaio-0.0.1 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 libaio-0.0.1
[INFO] finished frobbing libaio-0.0.1
[INFO] frobbed toml for libaio-0.0.1 written to work/ex/beta-1.38-1/sources/1.37.0/reg/libaio/0.0.1/Cargo.toml
[INFO] started frobbing libaio-0.0.1
[INFO] finished frobbing libaio-0.0.1
[INFO] frobbed toml for libaio-0.0.1 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/libaio/0.0.1/Cargo.toml
[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] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing libaio-0.0.1 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-7/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/libaio/0.0.1:/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] 218ee68a69054102fa634035436389b19d068ac7eb4443a47ff0caaf4af880e8
[INFO] running `"docker" "start" "-a" "218ee68a69054102fa634035436389b19d068ac7eb4443a47ff0caaf4af880e8"`
[INFO] [stderr]    Compiling eventfd v0.1.0
[INFO] [stderr] error[E0308]: mismatched types
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/eventfd-0.1.0/src/lib.rs:57:62
[INFO] [stderr]    |
[INFO] [stderr] 57 |             libc::read(self.fd as c_int, ptr as *mut c_void, std::mem::size_of_val(&ret) as u64)
[INFO] [stderr]    |                                                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected usize, found u64
[INFO] [stderr] help: you can convert an `u64` to `usize` and panic if the converted value wouldn't fit
[INFO] [stderr]    |
[INFO] [stderr] 57 |             libc::read(self.fd as c_int, ptr as *mut c_void, (std::mem::size_of_val(&ret) as u64).try_into().unwrap())
[INFO] [stderr]    |                                                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0308]: mismatched types
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/eventfd-0.1.0/src/lib.rs:71:65
[INFO] [stderr]    |
[INFO] [stderr] 71 |             libc::write(self.fd as c_int, ptr as *const c_void, std::mem::size_of_val(&val) as u64)
[INFO] [stderr]    |                                                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected usize, found u64
[INFO] [stderr] help: you can convert an `u64` to `usize` and panic if the converted value wouldn't fit
[INFO] [stderr]    |
[INFO] [stderr] 71 |             libc::write(self.fd as c_int, ptr as *const c_void, (std::mem::size_of_val(&val) as u64).try_into().unwrap())
[INFO] [stderr]    |                                                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0308`.
[INFO] [stderr] error: Could not compile `eventfd`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "218ee68a69054102fa634035436389b19d068ac7eb4443a47ff0caaf4af880e8"`
[INFO] running `"docker" "rm" "-f" "218ee68a69054102fa634035436389b19d068ac7eb4443a47ff0caaf4af880e8"`
[INFO] [stdout] 218ee68a69054102fa634035436389b19d068ac7eb4443a47ff0caaf4af880e8