[INFO] updating cached repository https://github.com/danielpclark/bench_ruby_ffi_example
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 2f8fae8311f8d69695d428e538201c98ba2c67c2
[INFO] testing danielpclark/bench_ruby_ffi_example against beta-2019-09-28 for beta-1.39-1
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdanielpclark%2Fbench_ruby_ffi_example" "work/builds/worker-0/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/danielpclark/bench_ruby_ffi_example on toolchain beta-2019-09-28
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/danielpclark/bench_ruby_ffi_example
[INFO] finished tweaking git repo https://github.com/danielpclark/bench_ruby_ffi_example
[INFO] tweaked toml for git repo https://github.com/danielpclark/bench_ruby_ffi_example written to work/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/danielpclark/bench_ruby_ffi_example already has a lockfile, it will not be regenerated
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-0/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-09-28" "build" "--frozen"`
[INFO] [stdout] 081583aff1e6a865e568dc9f23a8f8b3a54211e4423e559597c8038c53b0d56c
[INFO] running `"docker" "start" "-a" "081583aff1e6a865e568dc9f23a8f8b3a54211e4423e559597c8038c53b0d56c"`
[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/rustwide/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/rustwide/rustup-home/toolchains/beta-2019-09-28-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "/opt/rustwide/target/debug/deps/ffi_example.ffi_example.94zsokn8-cgu.0.rcgu.o" "/opt/rustwide/target/debug/deps/ffi_example.ffi_example.94zsokn8-cgu.1.rcgu.o" "/opt/rustwide/target/debug/deps/ffi_example.ffi_example.94zsokn8-cgu.10.rcgu.o" "/opt/rustwide/target/debug/deps/ffi_example.ffi_example.94zsokn8-cgu.11.rcgu.o" "/opt/rustwide/target/debug/deps/ffi_example.ffi_example.94zsokn8-cgu.12.rcgu.o" "/opt/rustwide/target/debug/deps/ffi_example.ffi_example.94zsokn8-cgu.13.rcgu.o" "/opt/rustwide/target/debug/deps/ffi_example.ffi_example.94zsokn8-cgu.14.rcgu.o" "/opt/rustwide/target/debug/deps/ffi_example.ffi_example.94zsokn8-cgu.15.rcgu.o" "/opt/rustwide/target/debug/deps/ffi_example.ffi_example.94zsokn8-cgu.2.rcgu.o" "/opt/rustwide/target/debug/deps/ffi_example.ffi_example.94zsokn8-cgu.3.rcgu.o" "/opt/rustwide/target/debug/deps/ffi_example.ffi_example.94zsokn8-cgu.4.rcgu.o" "/opt/rustwide/target/debug/deps/ffi_example.ffi_example.94zsokn8-cgu.5.rcgu.o" "/opt/rustwide/target/debug/deps/ffi_example.ffi_example.94zsokn8-cgu.6.rcgu.o" "/opt/rustwide/target/debug/deps/ffi_example.ffi_example.94zsokn8-cgu.7.rcgu.o" "/opt/rustwide/target/debug/deps/ffi_example.ffi_example.94zsokn8-cgu.8.rcgu.o" "/opt/rustwide/target/debug/deps/ffi_example.ffi_example.94zsokn8-cgu.9.rcgu.o" "-o" "/opt/rustwide/target/debug/deps/libffi_example.so" "-Wl,--version-script=/tmp/rustcVj7OAi/list" "/opt/rustwide/target/debug/deps/ffi_example.7nke6iw1edbvc21.rcgu.o" "/opt/rustwide/target/debug/deps/ffi_example.s6d21wwkou14itb.rcgu.o" "-Wl,-zrelro" "-Wl,-znow" "-nodefaultlibs" "-L" "/opt/rustwide/target/debug/deps" "-L" "/usr/lib" "-L" "/opt/rustwide/rustup-home/toolchains/beta-2019-09-28-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-Wl,-Bstatic" "-Wl,--whole-archive" "/tmp/rustcVj7OAi/libarray_tool-bd81b2ae6d164eb5.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/tmp/rustcVj7OAi/libruru-9e695bb98509ad8e.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/tmp/rustcVj7OAi/libruby_sys-6797c8873eab40b0.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/tmp/rustcVj7OAi/liblibc-75c570ca9a590a5e.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/tmp/rustcVj7OAi/liblazy_static-cfc8055357378528.rlib" "-Wl,--no-whole-archive" "-Wl,--start-group" "-Wl,--whole-archive" "/tmp/rustcVj7OAi/libstd-db812c66f862af4c.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/tmp/rustcVj7OAi/libpanic_unwind-e7871a21575d5ff7.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/tmp/rustcVj7OAi/libhashbrown-2f2c581bc0d759e6.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/tmp/rustcVj7OAi/librustc_std_workspace_alloc-35731cabc05dc8a0.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/tmp/rustcVj7OAi/libbacktrace-36477394541292db.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/tmp/rustcVj7OAi/libbacktrace_sys-8b706b170c1272d8.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/tmp/rustcVj7OAi/librustc_demangle-801dbb3043ccf581.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/tmp/rustcVj7OAi/libunwind-a32aa66ce6f72b21.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/tmp/rustcVj7OAi/libcfg_if-d00ea3bfb2bb6c00.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/tmp/rustcVj7OAi/liblibc-d2c6ebe88c3e113c.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/tmp/rustcVj7OAi/liballoc-df74f62f6bb60621.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/tmp/rustcVj7OAi/librustc_std_workspace_core-2170473575daeedb.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/tmp/rustcVj7OAi/libcore-1a08089bbddc4f51.rlib" "-Wl,--no-whole-archive" "-Wl,--end-group" "/tmp/rustcVj7OAi/libcompiler_builtins-f8f562e5472ad5c3.rlib" "-Wl,-Bdynamic" "-lruby-2.5" "-lutil" "-lutil" "-ldl" "-lrt" "-lpthread" "-lgcc_s" "-lc" "-lm" "-lrt" "-lpthread" "-lutil" "-lutil" "-shared"
[INFO] [stderr]   = note: /usr/bin/ld: cannot find -lruby-2.5
[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" "081583aff1e6a865e568dc9f23a8f8b3a54211e4423e559597c8038c53b0d56c"`
[INFO] running `"docker" "rm" "-f" "081583aff1e6a865e568dc9f23a8f8b3a54211e4423e559597c8038c53b0d56c"`
[INFO] [stdout] 081583aff1e6a865e568dc9f23a8f8b3a54211e4423e559597c8038c53b0d56c