[INFO] updating cached repository danielpclark/bench_ruby_ffi_example
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/danielpclark/bench_ruby_ffi_example
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/danielpclark/bench_ruby_ffi_example" "work/ex/beta-1.37-6/sources/1.36.0/gh/danielpclark/bench_ruby_ffi_example"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/danielpclark/bench_ruby_ffi_example'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/danielpclark/bench_ruby_ffi_example" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/danielpclark/bench_ruby_ffi_example"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/danielpclark/bench_ruby_ffi_example'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 2f8fae8311f8d69695d428e538201c98ba2c67c2
[INFO] sha for GitHub repo danielpclark/bench_ruby_ffi_example: 2f8fae8311f8d69695d428e538201c98ba2c67c2
[INFO] validating manifest of danielpclark/bench_ruby_ffi_example on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of danielpclark/bench_ruby_ffi_example on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing danielpclark/bench_ruby_ffi_example
[INFO] finished frobbing danielpclark/bench_ruby_ffi_example
[INFO] frobbed toml for danielpclark/bench_ruby_ffi_example written to work/ex/beta-1.37-6/sources/1.36.0/gh/danielpclark/bench_ruby_ffi_example/Cargo.toml
[INFO] started frobbing danielpclark/bench_ruby_ffi_example
[INFO] finished frobbing danielpclark/bench_ruby_ffi_example
[INFO] frobbed toml for danielpclark/bench_ruby_ffi_example written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/danielpclark/bench_ruby_ffi_example/Cargo.toml
[INFO] crate danielpclark/bench_ruby_ffi_example already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing danielpclark/bench_ruby_ffi_example against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/danielpclark/bench_ruby_ffi_example:/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-2019-07-23" "build" "--frozen"`
[INFO] [stdout] 86cc3464aa942a98a7f870726425c3f262314ecabc97fa77e909fd36729d6c45
[INFO] running `"docker" "start" "-a" "86cc3464aa942a98a7f870726425c3f262314ecabc97fa77e909fd36729d6c45"`
[INFO] [stderr]    Compiling ruby-sys v0.2.20
[INFO] [stderr]    Compiling array_tool v0.4.1
[INFO] [stderr]    Compiling ruru v0.9.3
[INFO] [stderr]    Compiling ffi_example v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `self::array_tool::string::Squeeze`
[INFO] [stderr]   --> src/lib.rs:11:7
[INFO] [stderr]    |
[INFO] [stderr] 11 |   use self::array_tool::string::Squeeze;
[INFO] [stderr]    |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_imports)] on by default
[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/beta-2019-07-23-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "/opt/crater/target/debug/deps/ffi_example.ffi_example.94zsokn8-cgu.0.rcgu.o" "/opt/crater/target/debug/deps/ffi_example.ffi_example.94zsokn8-cgu.1.rcgu.o" "/opt/crater/target/debug/deps/ffi_example.ffi_example.94zsokn8-cgu.10.rcgu.o" "/opt/crater/target/debug/deps/ffi_example.ffi_example.94zsokn8-cgu.11.rcgu.o" "/opt/crater/target/debug/deps/ffi_example.ffi_example.94zsokn8-cgu.12.rcgu.o" "/opt/crater/target/debug/deps/ffi_example.ffi_example.94zsokn8-cgu.13.rcgu.o" "/opt/crater/target/debug/deps/ffi_example.ffi_example.94zsokn8-cgu.14.rcgu.o" "/opt/crater/target/debug/deps/ffi_example.ffi_example.94zsokn8-cgu.15.rcgu.o" "/opt/crater/target/debug/deps/ffi_example.ffi_example.94zsokn8-cgu.2.rcgu.o" "/opt/crater/target/debug/deps/ffi_example.ffi_example.94zsokn8-cgu.3.rcgu.o" "/opt/crater/target/debug/deps/ffi_example.ffi_example.94zsokn8-cgu.4.rcgu.o" "/opt/crater/target/debug/deps/ffi_example.ffi_example.94zsokn8-cgu.5.rcgu.o" "/opt/crater/target/debug/deps/ffi_example.ffi_example.94zsokn8-cgu.6.rcgu.o" "/opt/crater/target/debug/deps/ffi_example.ffi_example.94zsokn8-cgu.7.rcgu.o" "/opt/crater/target/debug/deps/ffi_example.ffi_example.94zsokn8-cgu.8.rcgu.o" "/opt/crater/target/debug/deps/ffi_example.ffi_example.94zsokn8-cgu.9.rcgu.o" "-o" "/opt/crater/target/debug/deps/libffi_example.so" "-Wl,--version-script=/tmp/rustc9YCxwc/list" "/opt/crater/target/debug/deps/ffi_example.7nke6iw1edbvc21.rcgu.o" "/opt/crater/target/debug/deps/ffi_example.s6d21wwkou14itb.rcgu.o" "-Wl,-zrelro" "-Wl,-znow" "-nodefaultlibs" "-L" "/opt/crater/target/debug/deps" "-L" "/usr/lib" "-L" "/opt/crater/rustup-home/toolchains/beta-2019-07-23-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-Wl,-Bstatic" "-Wl,--whole-archive" "/tmp/rustc9YCxwc/libarray_tool-31ae61ae6a3c83a0.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/tmp/rustc9YCxwc/libruru-f7fd88840695ec57.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/tmp/rustc9YCxwc/libruby_sys-8e07e7dacbb25fc5.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/tmp/rustc9YCxwc/liblibc-99119b4d28284358.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/tmp/rustc9YCxwc/liblazy_static-e2bfda1b54f8e430.rlib" "-Wl,--no-whole-archive" "-Wl,--start-group" "-Wl,--whole-archive" "/tmp/rustc9YCxwc/libstd-a80a1e8e09cafef8.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/tmp/rustc9YCxwc/libpanic_unwind-e0e6351da805c468.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/tmp/rustc9YCxwc/libbacktrace-e04f54bafc95e331.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/tmp/rustc9YCxwc/libbacktrace_sys-67901d3322495bd5.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/tmp/rustc9YCxwc/librustc_demangle-bd390b1abaceaec1.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/tmp/rustc9YCxwc/libhashbrown-312dd37fdc7bedfc.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/tmp/rustc9YCxwc/librustc_std_workspace_alloc-8ed0e51d58d644a3.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/tmp/rustc9YCxwc/libunwind-8a423c320a6c707f.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/tmp/rustc9YCxwc/libcfg_if-d6a95598e2238263.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/tmp/rustc9YCxwc/liblibc-d231614b153016eb.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/tmp/rustc9YCxwc/liballoc-3821619027f463e4.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/tmp/rustc9YCxwc/librustc_std_workspace_core-1cfd794d18771a44.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/tmp/rustc9YCxwc/libcore-dcf33cf10c2452ef.rlib" "-Wl,--no-whole-archive" "-Wl,--end-group" "/tmp/rustc9YCxwc/libcompiler_builtins-c258fea34bf64bce.rlib" "-Wl,-Bdynamic" "-lruby-2.3" "-lutil" "-lutil" "-ldl" "-lrt" "-lpthread" "-lgcc_s" "-lc" "-lm" "-lrt" "-lpthread" "-lutil" "-lutil" "-shared"
[INFO] [stderr]   = note: /usr/bin/ld: cannot find -lruby-2.3
[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 `ffi_example`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "86cc3464aa942a98a7f870726425c3f262314ecabc97fa77e909fd36729d6c45"`
[INFO] running `"docker" "rm" "-f" "86cc3464aa942a98a7f870726425c3f262314ecabc97fa77e909fd36729d6c45"`
[INFO] [stdout] 86cc3464aa942a98a7f870726425c3f262314ecabc97fa77e909fd36729d6c45