[INFO] cloning repository https://github.com/danielpclark/bench_ruby_ffi_example
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/danielpclark/bench_ruby_ffi_example" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdanielpclark%2Fbench_ruby_ffi_example", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdanielpclark%2Fbench_ruby_ffi_example'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2f8fae8311f8d69695d428e538201c98ba2c67c2
[INFO] testing danielpclark/bench_ruby_ffi_example against beta-2021-08-01 for beta-1.55-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdanielpclark%2Fbench_ruby_ffi_example" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/danielpclark/bench_ruby_ffi_example on toolchain beta-2021-08-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[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 /workspace/builds/worker-7/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 `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ruru v0.9.3
[INFO] [stderr]   Downloaded array_tool v0.4.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ad25f826a1a3b436836d84343ad62c8fe581e8f8c85e65afe74dda3b4b477e7d
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "ad25f826a1a3b436836d84343ad62c8fe581e8f8c85e65afe74dda3b4b477e7d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ad25f826a1a3b436836d84343ad62c8fe581e8f8c85e65afe74dda3b4b477e7d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ad25f826a1a3b436836d84343ad62c8fe581e8f8c85e65afe74dda3b4b477e7d", kill_on_drop: false }`
[INFO] [stdout] ad25f826a1a3b436836d84343ad62c8fe581e8f8c85e65afe74dda3b4b477e7d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-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" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a5c0ddfddc04f9ef052f32f3e1703c671519ceef86e68a8b7bab9ccc9c84f6f1
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "a5c0ddfddc04f9ef052f32f3e1703c671519ceef86e68a8b7bab9ccc9c84f6f1", kill_on_drop: false }`
[INFO] [stderr]    Compiling ruby-sys v0.2.20
[INFO] [stderr]    Compiling libc v0.2.33
[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] [stdout] warning: unused import: `self::array_tool::string::Squeeze`
[INFO] [stdout]   --> src/lib.rs:11:7
[INFO] [stdout]    |
[INFO] [stdout] 11 |   use self::array_tool::string::Squeeze;
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `RuruExample`, which is not FFI-safe
[INFO] [stdout]   --> src/lib.rs:95:3
[INFO] [stdout]    |
[INFO] [stdout] 95 |   RuruExample,
[INFO] [stdout]    |   ^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(improper_ctypes_definitions)]` on by default
[INFO] [stdout]    = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct
[INFO] [stdout]    = note: this struct has unspecified layout
[INFO] [stdout] note: the type is defined here
[INFO] [stdout]   --> src/lib.rs:92:1
[INFO] [stdout]    |
[INFO] [stdout] 92 | class!(RuruExample);
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    = note: this warning originates in the macro `class` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: linking with `cc` failed: exit status: 1
[INFO] [stdout]   |
[INFO] [stdout]   = note: "cc" "-Wl,--version-script=/tmp/rustcM3IiSL/list" "-m64" "/opt/rustwide/target/debug/deps/ffi_example.ffi_example.cc5bbd7c-cgu.0.rcgu.o" "/opt/rustwide/target/debug/deps/ffi_example.ffi_example.cc5bbd7c-cgu.1.rcgu.o" "/opt/rustwide/target/debug/deps/ffi_example.ffi_example.cc5bbd7c-cgu.10.rcgu.o" "/opt/rustwide/target/debug/deps/ffi_example.ffi_example.cc5bbd7c-cgu.11.rcgu.o" "/opt/rustwide/target/debug/deps/ffi_example.ffi_example.cc5bbd7c-cgu.12.rcgu.o" "/opt/rustwide/target/debug/deps/ffi_example.ffi_example.cc5bbd7c-cgu.13.rcgu.o" "/opt/rustwide/target/debug/deps/ffi_example.ffi_example.cc5bbd7c-cgu.14.rcgu.o" "/opt/rustwide/target/debug/deps/ffi_example.ffi_example.cc5bbd7c-cgu.15.rcgu.o" "/opt/rustwide/target/debug/deps/ffi_example.ffi_example.cc5bbd7c-cgu.2.rcgu.o" "/opt/rustwide/target/debug/deps/ffi_example.ffi_example.cc5bbd7c-cgu.3.rcgu.o" "/opt/rustwide/target/debug/deps/ffi_example.ffi_example.cc5bbd7c-cgu.4.rcgu.o" "/opt/rustwide/target/debug/deps/ffi_example.ffi_example.cc5bbd7c-cgu.5.rcgu.o" "/opt/rustwide/target/debug/deps/ffi_example.ffi_example.cc5bbd7c-cgu.6.rcgu.o" "/opt/rustwide/target/debug/deps/ffi_example.ffi_example.cc5bbd7c-cgu.7.rcgu.o" "/opt/rustwide/target/debug/deps/ffi_example.ffi_example.cc5bbd7c-cgu.8.rcgu.o" "/opt/rustwide/target/debug/deps/ffi_example.ffi_example.cc5bbd7c-cgu.9.rcgu.o" "/opt/rustwide/target/debug/deps/ffi_example.2t5wug0axek5a0uh.rcgu.o" "/opt/rustwide/target/debug/deps/ffi_example.1q08j8xeqzit42g5.rcgu.o" "-Wl,--as-needed" "-L" "/opt/rustwide/target/debug/deps" "-L" "/usr/lib" "-L" "/opt/rustwide/rustup-home/toolchains/beta-2021-08-01-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-Wl,-Bstatic" "-Wl,--whole-archive" "/opt/rustwide/target/debug/deps/libarray_tool-8659868bb7b2de43.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/opt/rustwide/target/debug/deps/libruru-cdbddd0825983766.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/opt/rustwide/target/debug/deps/libruby_sys-cb66608bacf9ec5d.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/opt/rustwide/target/debug/deps/liblibc-b0bc7d06f5acb730.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/opt/rustwide/target/debug/deps/liblazy_static-9d59bc161134fae7.rlib" "-Wl,--no-whole-archive" "-Wl,--start-group" "-Wl,--whole-archive" "/opt/rustwide/rustup-home/toolchains/beta-2021-08-01-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-197d933f09d9a590.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/opt/rustwide/rustup-home/toolchains/beta-2021-08-01-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libpanic_unwind-46a006cddfd334f0.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/opt/rustwide/rustup-home/toolchains/beta-2021-08-01-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libminiz_oxide-5b9870310e470b38.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/opt/rustwide/rustup-home/toolchains/beta-2021-08-01-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libadler-260022ba8f1ab4ee.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/opt/rustwide/rustup-home/toolchains/beta-2021-08-01-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libobject-71377435a799394f.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/opt/rustwide/rustup-home/toolchains/beta-2021-08-01-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libaddr2line-658ee5924fde57cd.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/opt/rustwide/rustup-home/toolchains/beta-2021-08-01-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libgimli-9e8627da6bd1b94a.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/opt/rustwide/rustup-home/toolchains/beta-2021-08-01-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd_detect-19fdaac49f59be84.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/opt/rustwide/rustup-home/toolchains/beta-2021-08-01-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_demangle-cb00e2691ea45905.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/opt/rustwide/rustup-home/toolchains/beta-2021-08-01-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libhashbrown-50f6726defae5ae1.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/opt/rustwide/rustup-home/toolchains/beta-2021-08-01-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_alloc-2afc16311deea26e.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/opt/rustwide/rustup-home/toolchains/beta-2021-08-01-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libunwind-bb5cb0fe086ee8cf.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/opt/rustwide/rustup-home/toolchains/beta-2021-08-01-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcfg_if-896053247b5dfd0b.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/opt/rustwide/rustup-home/toolchains/beta-2021-08-01-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/liblibc-735e1f2ac3cf23be.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/opt/rustwide/rustup-home/toolchains/beta-2021-08-01-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/liballoc-9dfb6622644c732c.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/opt/rustwide/rustup-home/toolchains/beta-2021-08-01-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_core-beea7d9617fe25c5.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/opt/rustwide/rustup-home/toolchains/beta-2021-08-01-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-8ef7dd43fc671f88.rlib" "-Wl,--no-whole-archive" "-Wl,--end-group" "/opt/rustwide/rustup-home/toolchains/beta-2021-08-01-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcompiler_builtins-a9a3b2ad67977f47.rlib" "-Wl,-Bdynamic" "-lruby-2.7" "-lutil" "-lgcc_s" "-lutil" "-lrt" "-lpthread" "-lm" "-ldl" "-lc" "-Wl,--eh-frame-hdr" "-Wl,-znoexecstack" "-L" "/opt/rustwide/rustup-home/toolchains/beta-2021-08-01-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-o" "/opt/rustwide/target/debug/deps/libffi_example.so" "-shared" "-Wl,-zrelro" "-Wl,-znow" "-nodefaultlibs"
[INFO] [stdout]   = note: /usr/bin/ld: cannot find -lruby-2.7
[INFO] [stdout]           collect2: error: ld returned 1 exit status
[INFO] [stdout]           
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `ffi_example` due to 2 previous errors; 2 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "a5c0ddfddc04f9ef052f32f3e1703c671519ceef86e68a8b7bab9ccc9c84f6f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a5c0ddfddc04f9ef052f32f3e1703c671519ceef86e68a8b7bab9ccc9c84f6f1", kill_on_drop: false }`
[INFO] [stdout] a5c0ddfddc04f9ef052f32f3e1703c671519ceef86e68a8b7bab9ccc9c84f6f1
