[INFO] updating cached repository nsmryan/MachineLearningArtProject
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/nsmryan/MachineLearningArtProject
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/nsmryan/MachineLearningArtProject" "work/ex/beta-1.38-1/sources/1.37.0/gh/nsmryan/MachineLearningArtProject"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/nsmryan/MachineLearningArtProject'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/nsmryan/MachineLearningArtProject" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/nsmryan/MachineLearningArtProject"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/nsmryan/MachineLearningArtProject'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 5f9a523f363582176aa36c9429a7fe1ef8ca439e
[INFO] sha for GitHub repo nsmryan/MachineLearningArtProject: 5f9a523f363582176aa36c9429a7fe1ef8ca439e
[INFO] validating manifest of nsmryan/MachineLearningArtProject 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 nsmryan/MachineLearningArtProject 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 nsmryan/MachineLearningArtProject
[INFO] finished frobbing nsmryan/MachineLearningArtProject
[INFO] frobbed toml for nsmryan/MachineLearningArtProject written to work/ex/beta-1.38-1/sources/1.37.0/gh/nsmryan/MachineLearningArtProject/Cargo.toml
[INFO] started frobbing nsmryan/MachineLearningArtProject
[INFO] finished frobbing nsmryan/MachineLearningArtProject
[INFO] frobbed toml for nsmryan/MachineLearningArtProject written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/nsmryan/MachineLearningArtProject/Cargo.toml
[INFO] crate nsmryan/MachineLearningArtProject 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 nsmryan/MachineLearningArtProject 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-2/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/nsmryan/MachineLearningArtProject:/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] bd5ad0dec6042bc9c867a6a8b9ceca53b1f795443d5b8b08406bf5ec4064163c
[INFO] running `"docker" "start" "-a" "bd5ad0dec6042bc9c867a6a8b9ceca53b1f795443d5b8b08406bf5ec4064163c"`
[INFO] [stderr]    Compiling libc v0.2.53
[INFO] [stderr]    Compiling syn v0.15.33
[INFO] [stderr]    Compiling num-complex v0.2.1
[INFO] [stderr]    Compiling num-rational v0.2.1
[INFO] [stderr]    Compiling custom_derive v0.1.7
[INFO] [stderr]    Compiling itertools v0.7.11
[INFO] [stderr]    Compiling num-bigint v0.2.2
[INFO] [stderr]    Compiling conv v0.3.3
[INFO] [stderr]    Compiling num_cpus v1.10.0
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling fann-sys v0.1.7
[INFO] [stderr]    Compiling fann v0.1.7
[INFO] [stderr]    Compiling rayon-core v1.4.1
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling rayon v1.0.3
[INFO] [stderr]    Compiling num v0.2.0
[INFO] [stderr]    Compiling num-derive v0.2.5
[INFO] [stderr]    Compiling jpeg-decoder v0.1.15
[INFO] [stderr]    Compiling tiff v0.2.2
[INFO] [stderr]    Compiling image v0.21.1
[INFO] [stderr]    Compiling imageproc v0.18.0
[INFO] [stderr]    Compiling nn v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `val`
[INFO] [stderr]   --> src/main.rs:75:34
[INFO] [stderr]    |
[INFO] [stderr] 75 |                 .filter(|(index, val)| index % 3 == 0)
[INFO] [stderr]    |                                  ^^^ help: consider prefixing with an underscore: `_val`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `index`
[INFO] [stderr]   --> src/main.rs:76:24
[INFO] [stderr]    |
[INFO] [stderr] 76 |                 .map(|(index, val)| (*val as f32) / 256.0)
[INFO] [stderr]    |                        ^^^^^ help: consider prefixing with an underscore: `_index`
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:70:5
[INFO] [stderr]    |
[INFO] [stderr] 70 |     fann.save("network.txt");
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] error: linking with `cc` failed: exit code: 1
[INFO] [stderr]   |
[INFO] [stderr]   = note: "cc" "-Wl,--as-needed" "-Wl,-z,noexecstack" "-m64" "-L" "/opt/crater/rustup-home/toolchains/1.37.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "/opt/crater/target/debug/deps/nn-31dc6a5d01307c10.nn.3n0of9p3-cgu.0.rcgu.o" "/opt/crater/target/debug/deps/nn-31dc6a5d01307c10.nn.3n0of9p3-cgu.1.rcgu.o" "/opt/crater/target/debug/deps/nn-31dc6a5d01307c10.nn.3n0of9p3-cgu.10.rcgu.o" "/opt/crater/target/debug/deps/nn-31dc6a5d01307c10.nn.3n0of9p3-cgu.11.rcgu.o" "/opt/crater/target/debug/deps/nn-31dc6a5d01307c10.nn.3n0of9p3-cgu.12.rcgu.o" "/opt/crater/target/debug/deps/nn-31dc6a5d01307c10.nn.3n0of9p3-cgu.13.rcgu.o" "/opt/crater/target/debug/deps/nn-31dc6a5d01307c10.nn.3n0of9p3-cgu.14.rcgu.o" "/opt/crater/target/debug/deps/nn-31dc6a5d01307c10.nn.3n0of9p3-cgu.15.rcgu.o" "/opt/crater/target/debug/deps/nn-31dc6a5d01307c10.nn.3n0of9p3-cgu.2.rcgu.o" "/opt/crater/target/debug/deps/nn-31dc6a5d01307c10.nn.3n0of9p3-cgu.3.rcgu.o" "/opt/crater/target/debug/deps/nn-31dc6a5d01307c10.nn.3n0of9p3-cgu.4.rcgu.o" "/opt/crater/target/debug/deps/nn-31dc6a5d01307c10.nn.3n0of9p3-cgu.5.rcgu.o" "/opt/crater/target/debug/deps/nn-31dc6a5d01307c10.nn.3n0of9p3-cgu.6.rcgu.o" "/opt/crater/target/debug/deps/nn-31dc6a5d01307c10.nn.3n0of9p3-cgu.7.rcgu.o" "/opt/crater/target/debug/deps/nn-31dc6a5d01307c10.nn.3n0of9p3-cgu.8.rcgu.o" "/opt/crater/target/debug/deps/nn-31dc6a5d01307c10.nn.3n0of9p3-cgu.9.rcgu.o" "-o" "/opt/crater/target/debug/deps/nn-31dc6a5d01307c10" "/opt/crater/target/debug/deps/nn-31dc6a5d01307c10.52zo1xw8jpy6k0th.rcgu.o" "-Wl,--gc-sections" "-pie" "-Wl,-zrelro" "-Wl,-znow" "-nodefaultlibs" "-L" "/opt/crater/target/debug/deps" "-L" "/opt/crater/rustup-home/toolchains/1.37.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-Wl,-Bstatic" "/opt/crater/target/debug/deps/libimageproc-a7e04a45990db7b6.rlib" "/opt/crater/target/debug/deps/librand-4fe8de9c4488788e.rlib" "/opt/crater/target/debug/deps/librand_xorshift-15cb6a18b6c74131.rlib" "/opt/crater/target/debug/deps/librand_pcg-9dd28ba596d159b3.rlib" "/opt/crater/target/debug/deps/librand_hc-3f70f11e485734e0.rlib" "/opt/crater/target/debug/deps/librand_chacha-5858715fa3376b59.rlib" "/opt/crater/target/debug/deps/librand_isaac-89e2c3e133c46472.rlib" "/opt/crater/target/debug/deps/librand_core-4e8f985719ac1648.rlib" "/opt/crater/target/debug/deps/librand_os-27b1ca81cc44a96f.rlib" "/opt/crater/target/debug/deps/librand_jitter-c7a8e894021de283.rlib" "/opt/crater/target/debug/deps/librand_core-b87567e86349098d.rlib" "/opt/crater/target/debug/deps/libnum-64fa2a79ac669c1f.rlib" "/opt/crater/target/debug/deps/libnum_complex-c3afb49ca7e9a5ec.rlib" "/opt/crater/target/debug/deps/librusttype-2c919c38cb821ab7.rlib" "/opt/crater/target/debug/deps/libstb_truetype-9c8e4cbd27e5c247.rlib" "/opt/crater/target/debug/deps/libapprox-462ed98f72f2f759.rlib" "/opt/crater/target/debug/deps/libordered_float-30ad91b5dbf371a7.rlib" "/opt/crater/target/debug/deps/libconv-2d202f02c97335ff.rlib" "/opt/crater/target/debug/deps/libcustom_derive-728fc1aa1d61ecbc.rlib" "/opt/crater/target/debug/deps/libitertools-3ae7559e255cf35e.rlib" "/opt/crater/target/debug/deps/libimage-355c64368e54cfd8.rlib" "/opt/crater/target/debug/deps/libtiff-623f689567239eab.rlib" "/opt/crater/target/debug/deps/libpng-5fa845e3e9a716d1.rlib" "/opt/crater/target/debug/deps/libdeflate-624e3e1115864b7e.rlib" "/opt/crater/target/debug/deps/libinflate-28c9c14532c96ab0.rlib" "/opt/crater/target/debug/deps/libadler32-28cce00de1b6c9b3.rlib" "/opt/crater/target/debug/deps/libbitflags-031756039b29afaf.rlib" "/opt/crater/target/debug/deps/libjpeg_decoder-1f6c07add5fc3c82.rlib" "/opt/crater/target/debug/deps/librayon-cdd8b3d51fcfc447.rlib" "/opt/crater/target/debug/deps/libeither-dfa9c429720c7162.rlib" "/opt/crater/target/debug/deps/librayon_core-42ca222f75d61d8d.rlib" "/opt/crater/target/debug/deps/libnum_cpus-9b3a7d2b896c13d0.rlib" "/opt/crater/target/debug/deps/libcrossbeam_deque-16df859fbda2ebd4.rlib" "/opt/crater/target/debug/deps/libcrossbeam_epoch-79fa52262aa8dc27.rlib" "/opt/crater/target/debug/deps/libscopeguard-316f896e0d3e978a.rlib" "/opt/crater/target/debug/deps/libmemoffset-6c4b37f364c61d2a.rlib" "/opt/crater/target/debug/deps/liblazy_static-eb33edc716f69401.rlib" "/opt/crater/target/debug/deps/libcrossbeam_utils-065f1975a96ef8fd.rlib" "/opt/crater/target/debug/deps/libcfg_if-cf9b915f175eb0bb.rlib" "/opt/crater/target/debug/deps/libarrayvec-113ef836fc6f0f3a.rlib" "/opt/crater/target/debug/deps/libnodrop-844425db77ee9480.rlib" "/opt/crater/target/debug/deps/libscoped_threadpool-6ac8fca2f0d457e8.rlib" "/opt/crater/target/debug/deps/libgif-203aced80d59496c.rlib" "/opt/crater/target/debug/deps/libcolor_quant-6cd66d44303ef59b.rlib" "/opt/crater/target/debug/deps/libnum_rational-1700e485addeb199.rlib" "/opt/crater/target/debug/deps/libnum_bigint-b0b0e3b786d274b5.rlib" "/opt/crater/target/debug/deps/libnum_iter-bfcb9cd4cd3594d6.rlib" "/opt/crater/target/debug/deps/libnum_integer-0a0c42d6c9085c63.rlib" "/opt/crater/target/debug/deps/libnum_traits-86600a016bc21e91.rlib" "/opt/crater/target/debug/deps/liblzw-1f37f345e8096c7b.rlib" "/opt/crater/target/debug/deps/libbyteorder-579b0a05de5ca01c.rlib" "/opt/crater/target/debug/deps/libfann-8cd73e9e029d00b5.rlib" "/opt/crater/target/debug/deps/libfann_sys-60485dc3ba3b5459.rlib" "/opt/crater/target/debug/deps/liblibc-d1074a238611feff.rlib" "-Wl,--start-group" "/opt/crater/rustup-home/toolchains/1.37.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-4a76ff35a356aedf.rlib" "/opt/crater/rustup-home/toolchains/1.37.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libpanic_unwind-e11c7b3b3225afe2.rlib" "/opt/crater/rustup-home/toolchains/1.37.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libbacktrace-13217ede3d276f16.rlib" "/opt/crater/rustup-home/toolchains/1.37.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libbacktrace_sys-621a9ee22da6caa1.rlib" "/opt/crater/rustup-home/toolchains/1.37.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_demangle-546c844e8071bbeb.rlib" "/opt/crater/rustup-home/toolchains/1.37.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libhashbrown-be9569e4d599746f.rlib" "/opt/crater/rustup-home/toolchains/1.37.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_alloc-47d8845cef2a3bc5.rlib" "/opt/crater/rustup-home/toolchains/1.37.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libunwind-017511bce73a530c.rlib" "/opt/crater/rustup-home/toolchains/1.37.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcfg_if-be7979c57a08057b.rlib" "/opt/crater/rustup-home/toolchains/1.37.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/liblibc-d6459c4f0817c67c.rlib" "/opt/crater/rustup-home/toolchains/1.37.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/liballoc-580035dd98451925.rlib" "/opt/crater/rustup-home/toolchains/1.37.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_core-aee5c24fff305dea.rlib" "/opt/crater/rustup-home/toolchains/1.37.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-8a55a4098920125a.rlib" "-Wl,--end-group" "/opt/crater/rustup-home/toolchains/1.37.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcompiler_builtins-9fc4b5be2ba5cc19.rlib" "-Wl,-Bdynamic" "-lfann" "-lutil" "-lutil" "-ldl" "-lrt" "-lpthread" "-lgcc_s" "-lc" "-lm" "-lrt" "-lpthread" "-lutil" "-lutil"
[INFO] [stderr]   = note: /usr/bin/ld: cannot find -lfann
[INFO] [stderr]           collect2: error: ld returned 1 exit status
[INFO] [stderr]           
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `nn`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "bd5ad0dec6042bc9c867a6a8b9ceca53b1f795443d5b8b08406bf5ec4064163c"`
[INFO] running `"docker" "rm" "-f" "bd5ad0dec6042bc9c867a6a8b9ceca53b1f795443d5b8b08406bf5ec4064163c"`
[INFO] [stdout] bd5ad0dec6042bc9c867a6a8b9ceca53b1f795443d5b8b08406bf5ec4064163c