[INFO] updating cached repository jmquigs/mio-webserver
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/jmquigs/mio-webserver
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/jmquigs/mio-webserver" "work/ex/beta-1.38-1/sources/1.37.0/gh/jmquigs/mio-webserver"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/jmquigs/mio-webserver'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/jmquigs/mio-webserver" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/jmquigs/mio-webserver"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/jmquigs/mio-webserver'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 4f2d7ce27d9a24c358d0b9322fd2410e175bf1e9
[INFO] sha for GitHub repo jmquigs/mio-webserver: 4f2d7ce27d9a24c358d0b9322fd2410e175bf1e9
[INFO] validating manifest of jmquigs/mio-webserver 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 jmquigs/mio-webserver 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 jmquigs/mio-webserver
[INFO] finished frobbing jmquigs/mio-webserver
[INFO] frobbed toml for jmquigs/mio-webserver written to work/ex/beta-1.38-1/sources/1.37.0/gh/jmquigs/mio-webserver/Cargo.toml
[INFO] started frobbing jmquigs/mio-webserver
[INFO] finished frobbing jmquigs/mio-webserver
[INFO] frobbed toml for jmquigs/mio-webserver written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/jmquigs/mio-webserver/Cargo.toml
[INFO] crate jmquigs/mio-webserver 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] error: the lock file /mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/jmquigs/mio-webserver/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[INFO] the lockfile is outdated, regenerating it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]     Updating git repository `https://github.com/carllerche/bytes`
[INFO] [stderr]     Updating git repository `https://github.com/carllerche/mio`
[INFO] [stderr]     Updating git repository `https://github.com/alexcrichton/miow`
[INFO] [stderr]     Updating git repository `https://github.com/carllerche/nix-rust`
[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] [stderr]     Updating git repository `https://github.com/carllerche/bytes`
[INFO] [stderr]     Updating git repository `https://github.com/carllerche/mio`
[INFO] [stderr]     Updating git repository `https://github.com/alexcrichton/miow`
[INFO] [stderr]     Updating git repository `https://github.com/carllerche/nix-rust`
[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 jmquigs/mio-webserver 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-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/jmquigs/mio-webserver:/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] c0f94d94693507c87495aa70664bc4cfc3595a4fa32d1e59741dd1f430742157
[INFO] running `"docker" "start" "-a" "c0f94d94693507c87495aa70664bc4cfc3595a4fa32d1e59741dd1f430742157"`
[INFO] [stderr]    Compiling bytes v0.2.10 (https://github.com/carllerche/bytes?rev=7edb577d0a#7edb577d)
[INFO] [stderr]    Compiling ws2_32-sys v0.2.1
[INFO] [stderr]    Compiling nix v0.4.1 (https://github.com/carllerche/nix-rust?rev=ad87c3bdc9#ad87c3bd)
[INFO] [stderr]    Compiling env_logger v0.6.2
[INFO] [stderr]    Compiling miow v0.1.1 (https://github.com/alexcrichton/miow?rev=b00451dfb1#b00451df)
[INFO] [stderr] error[E0591]: can't transmute zero-sized type
[INFO] [stderr]    --> /opt/crater/cargo-home/git/checkouts/nix-rust-d606302ceff0dca5/ad87c3b/src/sched.rs:168:20
[INFO] [stderr]     |
[INFO] [stderr] 168 |         ffi::clone(mem::transmute(callback), ptr as *mut c_void, flags, &mut cb)
[INFO] [stderr]     |                    ^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: source type: for<'r> extern "C" fn(*mut std::boxed::Box<(dyn std::ops::FnMut() -> isize + 'r)>) -> i32 {sched::clone::callback}
[INFO] [stderr]     = note: target type: *const for<'r> extern "C" fn(*const std::boxed::Box<(dyn std::ops::FnMut() -> isize + 'r)>) -> i32
[INFO] [stderr]     = help: cast with `as` to a pointer instead
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0591`.
[INFO] [stderr] error: Could not compile `nix`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "c0f94d94693507c87495aa70664bc4cfc3595a4fa32d1e59741dd1f430742157"`
[INFO] running `"docker" "rm" "-f" "c0f94d94693507c87495aa70664bc4cfc3595a4fa32d1e59741dd1f430742157"`
[INFO] [stdout] c0f94d94693507c87495aa70664bc4cfc3595a4fa32d1e59741dd1f430742157