[INFO] updating cached 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" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune", kill_on_drop: false }`
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2f8fae8311f8d69695d428e538201c98ba2c67c2
[INFO] testing danielpclark/bench_ruby_ffi_example against try#03a1ea71b075ab964b5278bc6e74cd6c52c36ee0 for pr-74409
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdanielpclark%2Fbench_ruby_ffi_example" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/danielpclark/bench_ruby_ffi_example on toolchain 03a1ea71b075ab964b5278bc6e74cd6c52c36ee0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "read-manifest" "--manifest-path" "Cargo.toml", 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-5/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" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c3df08898feb29d540d67be6d65ae044676f0fe0f75dd217dccdd600240c3026
[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" "c3df08898feb29d540d67be6d65ae044676f0fe0f75dd217dccdd600240c3026", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c3df08898feb29d540d67be6d65ae044676f0fe0f75dd217dccdd600240c3026", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c3df08898feb29d540d67be6d65ae044676f0fe0f75dd217dccdd600240c3026", kill_on_drop: false }`
[INFO] [stdout] c3df08898feb29d540d67be6d65ae044676f0fe0f75dd217dccdd600240c3026
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-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@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] dda7b2c5649191d8241a8620194835cecdb4a5516fda8ad0d73251bb46597e9e
[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" "dda7b2c5649191d8241a8620194835cecdb4a5516fda8ad0d73251bb46597e9e", kill_on_drop: false }`
[INFO] [stderr]    Compiling ruby-sys v0.2.20
[INFO] [stderr]    Compiling libc v0.2.33
[INFO] [stderr]    Compiling lazy_static v0.2.9
[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 a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: linking with `cc` failed: exit code: 1
[INFO] [stdout]   |
[INFO] [stdout]   = note: "cc" "-Wl,--as-needed" "-Wl,-z,noexecstack" "-m64" "-Wl,--eh-frame-hdr" "-L" "/opt/rustwide/rustup-home/toolchains/03a1ea71b075ab964b5278bc6e74cd6c52c36ee0/lib/rustlib/x86_64-unknown-linux-gnu/lib" "/opt/rustwide/target/debug/deps/ffi_example.ffi_example.6skdqt6n-cgu.0.rcgu.o" "/opt/rustwide/target/debug/deps/ffi_example.ffi_example.6skdqt6n-cgu.1.rcgu.o" "/opt/rustwide/target/debug/deps/ffi_example.ffi_example.6skdqt6n-cgu.10.rcgu.o" "/opt/rustwide/target/debug/deps/ffi_example.ffi_example.6skdqt6n-cgu.11.rcgu.o" "/opt/rustwide/target/debug/deps/ffi_example.ffi_example.6skdqt6n-cgu.12.rcgu.o" "/opt/rustwide/target/debug/deps/ffi_example.ffi_example.6skdqt6n-cgu.13.rcgu.o" "/opt/rustwide/target/debug/deps/ffi_example.ffi_example.6skdqt6n-cgu.14.rcgu.o" "/opt/rustwide/target/debug/deps/ffi_example.ffi_example.6skdqt6n-cgu.15.rcgu.o" "/opt/rustwide/target/debug/deps/ffi_example.ffi_example.6skdqt6n-cgu.2.rcgu.o" "/opt/rustwide/target/debug/deps/ffi_example.ffi_example.6skdqt6n-cgu.3.rcgu.o" "/opt/rustwide/target/debug/deps/ffi_example.ffi_example.6skdqt6n-cgu.4.rcgu.o" "/opt/rustwide/target/debug/deps/ffi_example.ffi_example.6skdqt6n-cgu.5.rcgu.o" "/opt/rustwide/target/debug/deps/ffi_example.ffi_example.6skdqt6n-cgu.6.rcgu.o" "/opt/rustwide/target/debug/deps/ffi_example.ffi_example.6skdqt6n-cgu.7.rcgu.o" "/opt/rustwide/target/debug/deps/ffi_example.ffi_example.6skdqt6n-cgu.8.rcgu.o" "/opt/rustwide/target/debug/deps/ffi_example.ffi_example.6skdqt6n-cgu.9.rcgu.o" "-o" "/opt/rustwide/target/debug/deps/libffi_example.so" "-Wl,--version-script=/tmp/rustcQBMWYg/list" "/opt/rustwide/target/debug/deps/ffi_example.3s7ff8uk2f6l1x54.rcgu.o" "/opt/rustwide/target/debug/deps/ffi_example.7ev6yys56tczrsw.rcgu.o" "-shared" "-Wl,-zrelro" "-Wl,-znow" "-nodefaultlibs" "-L" "/opt/rustwide/target/debug/deps" "-L" "/usr/lib" "-L" "/opt/rustwide/rustup-home/toolchains/03a1ea71b075ab964b5278bc6e74cd6c52c36ee0/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-Wl,-Bstatic" "-Wl,--whole-archive" "/tmp/rustcQBMWYg/libarray_tool-3031852808b8ba8d.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/tmp/rustcQBMWYg/libruru-effa4e77c461b587.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/tmp/rustcQBMWYg/libruby_sys-c0e075825f8ecbec.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/tmp/rustcQBMWYg/liblibc-95696bfcce61be44.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/tmp/rustcQBMWYg/liblazy_static-e7da7dd7cd19118c.rlib" "-Wl,--no-whole-archive" "-Wl,--start-group" "-Wl,--whole-archive" "/tmp/rustcQBMWYg/libstd-5989bcf78182f65e.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/tmp/rustcQBMWYg/libpanic_unwind-4d6da34bc177af8d.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/tmp/rustcQBMWYg/libhashbrown-10e0d6c948699482.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/tmp/rustcQBMWYg/librustc_std_workspace_alloc-c2318e2415657781.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/tmp/rustcQBMWYg/libbacktrace-3815b93ed84badbb.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/tmp/rustcQBMWYg/libbacktrace_sys-d7999143d95238cb.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/tmp/rustcQBMWYg/librustc_demangle-c58298a0d40df8b8.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/tmp/rustcQBMWYg/libunwind-b7de97e2ba6fb4e2.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/tmp/rustcQBMWYg/libcfg_if-6f71c9f654d72cce.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/tmp/rustcQBMWYg/liblibc-95ea48ddc44a311b.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/tmp/rustcQBMWYg/liballoc-7402cd4761aebc14.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/tmp/rustcQBMWYg/librustc_std_workspace_core-68f423c59dc48a40.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/tmp/rustcQBMWYg/libcore-54580c7798bf2225.rlib" "-Wl,--no-whole-archive" "-Wl,--end-group" "/tmp/rustcQBMWYg/libcompiler_builtins-95a4d456339b7385.rlib" "-Wl,-Bdynamic" "-lruby-2.7" "-lutil" "-lutil" "-ldl" "-lrt" "-lpthread" "-lgcc_s" "-lc" "-lm" "-lrt" "-lpthread" "-lutil" "-ldl" "-lutil"
[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`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "dda7b2c5649191d8241a8620194835cecdb4a5516fda8ad0d73251bb46597e9e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dda7b2c5649191d8241a8620194835cecdb4a5516fda8ad0d73251bb46597e9e", kill_on_drop: false }`
[INFO] [stdout] dda7b2c5649191d8241a8620194835cecdb4a5516fda8ad0d73251bb46597e9e