[INFO] updating cached repository scottzzq/IFS
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/scottzzq/IFS
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/scottzzq/IFS" "work/ex/beta-1.38-1/sources/1.37.0/gh/scottzzq/IFS"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/scottzzq/IFS'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/scottzzq/IFS" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/scottzzq/IFS"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/scottzzq/IFS'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 18b678ec4f297d093ab2e410247600f56addf027
[INFO] sha for GitHub repo scottzzq/IFS: 18b678ec4f297d093ab2e410247600f56addf027
[INFO] validating manifest of scottzzq/IFS 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 scottzzq/IFS 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 scottzzq/IFS
[INFO] finished frobbing scottzzq/IFS
[INFO] frobbed toml for scottzzq/IFS written to work/ex/beta-1.38-1/sources/1.37.0/gh/scottzzq/IFS/Cargo.toml
[INFO] started frobbing scottzzq/IFS
[INFO] finished frobbing scottzzq/IFS
[INFO] frobbed toml for scottzzq/IFS written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/scottzzq/IFS/Cargo.toml
[INFO] crate scottzzq/IFS 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] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing scottzzq/IFS 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/scottzzq/IFS:/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] fa8d7f3a36fd63c5f100a8b398e3753a268aebd6130731f98ab4d59b67e8ec6d
[INFO] running `"docker" "start" "-a" "fa8d7f3a36fd63c5f100a8b398e3753a268aebd6130731f98ab4d59b67e8ec6d"`
[INFO] [stderr]    Compiling winapi-build v0.1.1
[INFO] [stderr]    Compiling matches v0.1.4
[INFO] [stderr]    Compiling semver v0.1.20
[INFO] [stderr]    Compiling libc v0.2.21
[INFO] [stderr]    Compiling num-traits v0.1.37
[INFO] [stderr]    Compiling unicode-normalization v0.1.4
[INFO] [stderr]    Compiling rustc-serialize v0.3.22
[INFO] [stderr]    Compiling winapi v0.2.8
[INFO] [stderr]    Compiling gcc v0.3.43
[INFO] [stderr]    Compiling log v0.3.6
[INFO] [stderr]    Compiling cfg-if v0.1.0
[INFO] [stderr]    Compiling backtrace v0.2.3
[INFO] [stderr]    Compiling bitflags v0.4.0
[INFO] [stderr]    Compiling httparse v1.2.1
[INFO] [stderr]    Compiling void v1.0.2
[INFO] [stderr]    Compiling traitobject v0.0.1
[INFO] [stderr]    Compiling typeable v0.1.2
[INFO] [stderr]    Compiling bitflags v0.3.3
[INFO] [stderr]    Compiling language-tags v0.2.2
[INFO] [stderr]    Compiling strsim v0.6.0
[INFO] [stderr]    Compiling unicode-segmentation v1.1.0
[INFO] [stderr]    Compiling vec_map v0.6.0
[INFO] [stderr]    Compiling ansi_term v0.9.0
[INFO] [stderr]    Compiling protobuf v1.2.2
[INFO] [stderr]    Compiling utf8-ranges v0.1.3
[INFO] [stderr]    Compiling quick-error v0.2.2
[INFO] [stderr]    Compiling fnv v1.0.5
[INFO] [stderr]    Compiling unicode-width v0.1.4
[INFO] [stderr]    Compiling lazy_static v0.2.4
[INFO] [stderr]    Compiling bytes v0.3.0
[INFO] [stderr]    Compiling regex-syntax v0.3.9
[INFO] [stderr]    Compiling bitflags v0.7.0
[INFO] [stderr]    Compiling libc v0.1.12
[INFO] [stderr]    Compiling slab v0.1.3
[INFO] [stderr]    Compiling rustc-demangle v0.1.4
[INFO] [stderr]    Compiling getopts v0.2.14
[INFO] [stderr]    Compiling threadpool v1.3.2
[INFO] [stderr]    Compiling byteorder v0.5.3
[INFO] [stderr]    Compiling unicode-bidi v0.2.5
[INFO] [stderr]    Compiling kernel32-sys v0.2.2
[INFO] [stderr] warning[E0503]: cannot use `state` because it was mutably borrowed
[INFO] [stderr]     --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/getopts-0.2.14/src/lib.rs:1008:33
[INFO] [stderr]      |
[INFO] [stderr] 955  |     let mut machine = |cont: &mut bool, (i, c): (usize, char)| {
[INFO] [stderr]      |                       ---------------------------------------- borrow of `state` occurs here
[INFO] [stderr] ...
[INFO] [stderr] 959  |         state = match (state, whitespace, limit) {
[INFO] [stderr]      |                        ----- borrow occurs due to use of `state` in closure
[INFO] [stderr] ...
[INFO] [stderr] 1008 |     while cont && match state { B | C => true, A => false } {
[INFO] [stderr]      |                                 ^ use of borrowed `state`
[INFO] [stderr] 1009 |         machine(&mut cont, (fake_i, ' '));
[INFO] [stderr]      |         ------- borrow later used here
[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]    Compiling ws2_32-sys v0.2.1
[INFO] [stderr]    Compiling kernel32-sys v0.1.4
[INFO] [stderr]    Compiling dbghelp-sys v0.2.0
[INFO] [stderr]    Compiling rand v0.3.15
[INFO] [stderr]    Compiling time v0.1.36
[INFO] [stderr]    Compiling net2 v0.2.26
[INFO] [stderr]    Compiling memchr v0.1.11
[INFO] [stderr]    Compiling num_cpus v1.3.0
[INFO] [stderr]    Compiling term_size v0.2.3
[INFO] [stderr]    Compiling fs2 v0.4.1
[INFO] [stderr]    Compiling num-integer v0.1.33
[INFO] [stderr]    Compiling hpack v0.2.0
[INFO] [stderr]    Compiling mime v0.2.2
[INFO] [stderr]    Compiling rustc_version v0.1.7
[INFO] [stderr]    Compiling nix v0.5.0-pre (https://github.com/carllerche/nix-rust?rev=c4257f8a76#c4257f8a)
[INFO] [stderr]    Compiling crc v1.4.0
[INFO] [stderr]    Compiling librocksdb_sys v0.1.0 (https://github.com/pingcap/rust-rocksdb.git#968ba41e)
[INFO] [stderr]    Compiling backtrace-sys v0.1.10
[INFO] [stderr]    Compiling aho-corasick v0.5.3
[INFO] [stderr]    Compiling idna v0.1.0
[INFO] [stderr]    Compiling clap v2.20.5
[INFO] [stderr]    Compiling num-iter v0.1.33
[INFO] [stderr]    Compiling tempdir v0.3.5
[INFO] [stderr]    Compiling uuid v0.3.1
[INFO] [stderr] error[E0591]: can't transmute zero-sized type
[INFO] [stderr]    --> /opt/crater/cargo-home/git/checkouts/nix-rust-d606302ceff0dca5/c4257f8/src/sched.rs:190:20
[INFO] [stderr]     |
[INFO] [stderr] 190 |         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]    Compiling unicase v1.4.0
[INFO] [stderr]    Compiling nix v0.6.0
[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] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "fa8d7f3a36fd63c5f100a8b398e3753a268aebd6130731f98ab4d59b67e8ec6d"`
[INFO] running `"docker" "rm" "-f" "fa8d7f3a36fd63c5f100a8b398e3753a268aebd6130731f98ab4d59b67e8ec6d"`
[INFO] [stdout] fa8d7f3a36fd63c5f100a8b398e3753a268aebd6130731f98ab4d59b67e8ec6d