[INFO] cloning repository https://github.com/LnL7/letty
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/LnL7/letty" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLnL7%2Fletty", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLnL7%2Fletty'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 372be41dda29b059fef0e82720f887e92581c5c5
[INFO] testing LnL7/letty against 1.49.0 for beta-1.50-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLnL7%2Fletty" "/workspace/builds/worker-14/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/LnL7/letty on toolchain 1.49.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/LnL7/letty
[INFO] finished tweaking git repo https://github.com/LnL7/letty
[INFO] tweaked toml for git repo https://github.com/LnL7/letty written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate git repo https://github.com/LnL7/letty already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f98311a182d818d68e317c03bbd6683582f37ce4aa2c66c787a6020577a23d1b
[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" "f98311a182d818d68e317c03bbd6683582f37ce4aa2c66c787a6020577a23d1b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f98311a182d818d68e317c03bbd6683582f37ce4aa2c66c787a6020577a23d1b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f98311a182d818d68e317c03bbd6683582f37ce4aa2c66c787a6020577a23d1b", kill_on_drop: false }`
[INFO] [stdout] f98311a182d818d68e317c03bbd6683582f37ce4aa2c66c787a6020577a23d1b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0db34c994d62f44ee6c23c5a49f00625cec57239671c07ae6fc5a8d5cc849cea
[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" "0db34c994d62f44ee6c23c5a49f00625cec57239671c07ae6fc5a8d5cc849cea", kill_on_drop: false }`
[INFO] [stderr]    Compiling core-foundation-sys v0.6.2
[INFO] [stderr]    Compiling io-kit-sys v0.1.0
[INFO] [stderr]    Compiling mach v0.2.3
[INFO] [stderr]    Compiling core-foundation v0.6.4
[INFO] [stderr]    Compiling letty v0.1.0 (/opt/rustwide/workdir)
[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/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "/opt/rustwide/target/debug/deps/letty_blink-9d224643d98efd15.letty_blink.32vnpbs1-cgu.0.rcgu.o" "/opt/rustwide/target/debug/deps/letty_blink-9d224643d98efd15.letty_blink.32vnpbs1-cgu.1.rcgu.o" "/opt/rustwide/target/debug/deps/letty_blink-9d224643d98efd15.letty_blink.32vnpbs1-cgu.10.rcgu.o" "/opt/rustwide/target/debug/deps/letty_blink-9d224643d98efd15.letty_blink.32vnpbs1-cgu.11.rcgu.o" "/opt/rustwide/target/debug/deps/letty_blink-9d224643d98efd15.letty_blink.32vnpbs1-cgu.12.rcgu.o" "/opt/rustwide/target/debug/deps/letty_blink-9d224643d98efd15.letty_blink.32vnpbs1-cgu.13.rcgu.o" "/opt/rustwide/target/debug/deps/letty_blink-9d224643d98efd15.letty_blink.32vnpbs1-cgu.14.rcgu.o" "/opt/rustwide/target/debug/deps/letty_blink-9d224643d98efd15.letty_blink.32vnpbs1-cgu.15.rcgu.o" "/opt/rustwide/target/debug/deps/letty_blink-9d224643d98efd15.letty_blink.32vnpbs1-cgu.2.rcgu.o" "/opt/rustwide/target/debug/deps/letty_blink-9d224643d98efd15.letty_blink.32vnpbs1-cgu.3.rcgu.o" "/opt/rustwide/target/debug/deps/letty_blink-9d224643d98efd15.letty_blink.32vnpbs1-cgu.4.rcgu.o" "/opt/rustwide/target/debug/deps/letty_blink-9d224643d98efd15.letty_blink.32vnpbs1-cgu.5.rcgu.o" "/opt/rustwide/target/debug/deps/letty_blink-9d224643d98efd15.letty_blink.32vnpbs1-cgu.6.rcgu.o" "/opt/rustwide/target/debug/deps/letty_blink-9d224643d98efd15.letty_blink.32vnpbs1-cgu.7.rcgu.o" "/opt/rustwide/target/debug/deps/letty_blink-9d224643d98efd15.letty_blink.32vnpbs1-cgu.8.rcgu.o" "/opt/rustwide/target/debug/deps/letty_blink-9d224643d98efd15.letty_blink.32vnpbs1-cgu.9.rcgu.o" "-o" "/opt/rustwide/target/debug/deps/letty_blink-9d224643d98efd15" "/opt/rustwide/target/debug/deps/letty_blink-9d224643d98efd15.k1lnglqm8owdwot.rcgu.o" "-Wl,--gc-sections" "-pie" "-Wl,-zrelro" "-Wl,-znow" "-nodefaultlibs" "-L" "/opt/rustwide/target/debug/deps" "-L" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-Wl,-Bstatic" "/opt/rustwide/target/debug/deps/libletty-d221b4d25099ebaa.rlib" "/opt/rustwide/target/debug/deps/libio_kit_sys-b13f87839542a15f.rlib" "/opt/rustwide/target/debug/deps/libmach-2d60388cf44b5102.rlib" "/opt/rustwide/target/debug/deps/libcore_foundation-843a82fb29d2d104.rlib" "/opt/rustwide/target/debug/deps/liblibc-a301cf425e3bfd17.rlib" "/opt/rustwide/target/debug/deps/libcore_foundation_sys-c951c6e08f8eef48.rlib" "-Wl,--start-group" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-e12de7683a34c500.rlib" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libpanic_unwind-446a53c2e468675f.rlib" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libminiz_oxide-86fef9fb252a2d33.rlib" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libadler-3bed9bfd30304751.rlib" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libobject-0e38eeb474a7b386.rlib" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libaddr2line-a846ed547b824740.rlib" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libgimli-c9540f0a4fb9265d.rlib" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_demangle-7d2ca66c92c356eb.rlib" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libhashbrown-147e2c808f949493.rlib" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_alloc-bd2a4369506670e9.rlib" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libunwind-74bfdd0ce7d0ed48.rlib" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcfg_if-6777f47f1c491841.rlib" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/liblibc-b104f1790174f2be.rlib" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/liballoc-db37898996f45c13.rlib" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_core-25b7435131fc4938.rlib" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-9d4b6f3c097e876e.rlib" "-Wl,--end-group" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcompiler_builtins-3f953ad652ab829a.rlib" "-Wl,-Bdynamic" "-lutil" "-ldl" "-lutil" "-lgcc_s" "-lutil" "-lrt" "-lpthread" "-lm" "-ldl" "-lc"
[INFO] [stdout]   = note: /usr/bin/ld: /opt/rustwide/target/debug/deps/letty_blink-9d224643d98efd15.letty_blink.32vnpbs1-cgu.13.rcgu.o: in function `<core_foundation::dictionary::CFDictionary<K,V> as core::ops::drop::Drop>::drop':
[INFO] [stdout]           /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/core-foundation-0.6.4/src/dictionary.rs:29: undefined reference to `CFRelease'
[INFO] [stdout]           /usr/bin/ld: /opt/rustwide/target/debug/deps/libletty-d221b4d25099ebaa.rlib(letty-d221b4d25099ebaa.letty.ec43k0b6-cgu.1.rcgu.o): in function `<letty::hid::device::IOHIDDevice as core::ops::drop::Drop>::drop':
[INFO] [stdout]           /opt/rustwide/workdir/src/hid/device.rs:27: undefined reference to `CFRelease'
[INFO] [stdout]           /usr/bin/ld: /opt/rustwide/target/debug/deps/libletty-d221b4d25099ebaa.rlib(letty-d221b4d25099ebaa.letty.ec43k0b6-cgu.1.rcgu.o): in function `letty::hid::device::IOHIDDevice::get_matching_elements':
[INFO] [stdout]           /opt/rustwide/workdir/src/hid/device.rs:34: undefined reference to `IOHIDDeviceCopyMatchingElements'
[INFO] [stdout]           /usr/bin/ld: /opt/rustwide/workdir/src/hid/device.rs:40: undefined reference to `CFArrayGetCount'
[INFO] [stdout]           /usr/bin/ld: /opt/rustwide/workdir/src/hid/device.rs:55: undefined reference to `CFRelease'
[INFO] [stdout]           /usr/bin/ld: /opt/rustwide/workdir/src/hid/device.rs:44: undefined reference to `CFArrayGetValueAtIndex'
[INFO] [stdout]           /usr/bin/ld: /opt/rustwide/target/debug/deps/libletty-d221b4d25099ebaa.rlib(letty-d221b4d25099ebaa.letty.ec43k0b6-cgu.1.rcgu.o): in function `letty::hid::device::IOHIDDevice::set_value':
[INFO] [stdout]           /opt/rustwide/workdir/src/hid/device.rs:84: undefined reference to `kCFAllocatorDefault'
[INFO] [stdout]           /usr/bin/ld: /opt/rustwide/workdir/src/hid/device.rs:85: undefined reference to `IOHIDValueCreateWithIntegerValue'
[INFO] [stdout]           /usr/bin/ld: /opt/rustwide/workdir/src/hid/device.rs:86: undefined reference to `IOHIDDeviceSetValue'
[INFO] [stdout]           /usr/bin/ld: /opt/rustwide/workdir/src/hid/device.rs:88: undefined reference to `CFRelease'
[INFO] [stdout]           /usr/bin/ld: /opt/rustwide/target/debug/deps/libletty-d221b4d25099ebaa.rlib(letty-d221b4d25099ebaa.letty.ec43k0b6-cgu.1.rcgu.o): in function `<letty::hid::device::IOHIDDevice as core_foundation::base::TCFType>::wrap_under_get_rule':
[INFO] [stdout]           /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/core-foundation-0.6.4/src/lib.rs:98: undefined reference to `CFRetain'
[INFO] [stdout]           /usr/bin/ld: /opt/rustwide/target/debug/deps/libletty-d221b4d25099ebaa.rlib(letty-d221b4d25099ebaa.letty.ec43k0b6-cgu.11.rcgu.o): in function `core_foundation::dictionary::CFDictionary<K,V>::from_CFType_pairs':
[INFO] [stdout]           /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/core-foundation-0.6.4/src/dictionary.rs:46: undefined reference to `kCFAllocatorDefault'
[INFO] [stdout]           /usr/bin/ld: /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/core-foundation-0.6.4/src/dictionary.rs:(.text._ZN15core_foundation10dictionary25CFDictionary$LT$K$C$V$GT$17from_CFType_pairs17hf0da4d4fdbbfdcc1E+0xfb): undefined reference to `kCFTypeDictionaryKeyCallBacks'
[INFO] [stdout]           /usr/bin/ld: /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/core-foundation-0.6.4/src/dictionary.rs:(.text._ZN15core_foundation10dictionary25CFDictionary$LT$K$C$V$GT$17from_CFType_pairs17hf0da4d4fdbbfdcc1E+0x102): undefined reference to `kCFTypeDictionaryValueCallBacks'
[INFO] [stdout]           /usr/bin/ld: /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/core-foundation-0.6.4/src/dictionary.rs:46: undefined reference to `CFDictionaryCreate'
[INFO] [stdout]           /usr/bin/ld: /opt/rustwide/target/debug/deps/libletty-d221b4d25099ebaa.rlib(letty-d221b4d25099ebaa.letty.ec43k0b6-cgu.15.rcgu.o): in function `<core_foundation::number::CFNumber as core::convert::From<i32>>::from':
[INFO] [stdout]           /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/core-foundation-0.6.4/src/number.rs:68: undefined reference to `kCFAllocatorDefault'
[INFO] [stdout]           /usr/bin/ld: /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/core-foundation-0.6.4/src/number.rs:70: undefined reference to `CFNumberCreate'
[INFO] [stdout]           /usr/bin/ld: /opt/rustwide/target/debug/deps/libletty-d221b4d25099ebaa.rlib(letty-d221b4d25099ebaa.letty.ec43k0b6-cgu.5.rcgu.o): in function `<letty::hid::manager::IOHIDManager as core::ops::drop::Drop>::drop':
[INFO] [stdout]           /opt/rustwide/workdir/src/hid/manager.rs:29: undefined reference to `CFRelease'
[INFO] [stdout]           /usr/bin/ld: /opt/rustwide/target/debug/deps/libletty-d221b4d25099ebaa.rlib(letty-d221b4d25099ebaa.letty.ec43k0b6-cgu.5.rcgu.o): in function `letty::hid::manager::IOHIDManager::new':
[INFO] [stdout]           /opt/rustwide/workdir/src/hid/manager.rs:34: undefined reference to `kCFAllocatorDefault'
[INFO] [stdout]           /usr/bin/ld: /opt/rustwide/workdir/src/hid/manager.rs:35: undefined reference to `IOHIDManagerCreate'
[INFO] [stdout]           /usr/bin/ld: /opt/rustwide/target/debug/deps/libletty-d221b4d25099ebaa.rlib(letty-d221b4d25099ebaa.letty.ec43k0b6-cgu.5.rcgu.o): in function `letty::hid::manager::IOHIDManager::open':
[INFO] [stdout]           /opt/rustwide/workdir/src/hid/manager.rs:48: undefined reference to `IOHIDManagerOpen'
[INFO] [stdout]           /usr/bin/ld: /opt/rustwide/target/debug/deps/libletty-d221b4d25099ebaa.rlib(letty-d221b4d25099ebaa.letty.ec43k0b6-cgu.5.rcgu.o): in function `letty::hid::manager::IOHIDManager::close':
[INFO] [stdout]           /opt/rustwide/workdir/src/hid/manager.rs:56: undefined reference to `IOHIDManagerSetDeviceMatching'
[INFO] [stdout]           /usr/bin/ld: /opt/rustwide/workdir/src/hid/manager.rs:57: undefined reference to `IOHIDManagerClose'
[INFO] [stdout]           /usr/bin/ld: /opt/rustwide/target/debug/deps/libletty-d221b4d25099ebaa.rlib(letty-d221b4d25099ebaa.letty.ec43k0b6-cgu.5.rcgu.o): in function `letty::hid::manager::IOHIDManager::set_device_matching':
[INFO] [stdout]           /opt/rustwide/workdir/src/hid/manager.rs:61: undefined reference to `IOHIDManagerSetDeviceMatching'
[INFO] [stdout]           /usr/bin/ld: /opt/rustwide/target/debug/deps/libletty-d221b4d25099ebaa.rlib(letty-d221b4d25099ebaa.letty.ec43k0b6-cgu.5.rcgu.o): in function `letty::hid::manager::IOHIDManager::get_devices':
[INFO] [stdout]           /opt/rustwide/workdir/src/hid/manager.rs:65: undefined reference to `IOHIDManagerCopyDevices'
[INFO] [stdout]           /usr/bin/ld: /opt/rustwide/workdir/src/hid/manager.rs:69: undefined reference to `CFSetGetCount'
[INFO] [stdout]           /usr/bin/ld: /opt/rustwide/workdir/src/hid/manager.rs:72: undefined reference to `CFSetApplyFunction'
[INFO] [stdout]           /usr/bin/ld: /opt/rustwide/workdir/src/hid/manager.rs:74: undefined reference to `CFRelease'
[INFO] [stdout]           /usr/bin/ld: /opt/rustwide/target/debug/deps/libletty-d221b4d25099ebaa.rlib(letty-d221b4d25099ebaa.letty.ec43k0b6-cgu.6.rcgu.o): in function `core_foundation::string::CFString::new':
[INFO] [stdout]           /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/core-foundation-0.6.4/src/string.rs:109: undefined reference to `kCFAllocatorDefault'
[INFO] [stdout]           /usr/bin/ld: /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/core-foundation-0.6.4/src/string.rs:111: undefined reference to `CFStringCreateWithBytes'
[INFO] [stdout]           /usr/bin/ld: /opt/rustwide/target/debug/deps/libletty-d221b4d25099ebaa.rlib(letty-d221b4d25099ebaa.letty.ec43k0b6-cgu.9.rcgu.o): in function `<letty::hid::element::IOHIDElement as core::ops::drop::Drop>::drop':
[INFO] [stdout]           /opt/rustwide/workdir/src/hid/element.rs:20: undefined reference to `CFRelease'
[INFO] [stdout]           /usr/bin/ld: /opt/rustwide/target/debug/deps/libletty-d221b4d25099ebaa.rlib(letty-d221b4d25099ebaa.letty.ec43k0b6-cgu.9.rcgu.o): in function `<letty::hid::element::IOHIDElement as core_foundation::base::TCFType>::wrap_under_get_rule':
[INFO] [stdout]           /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/core-foundation-0.6.4/src/lib.rs:98: undefined reference to `CFRetain'
[INFO] [stdout]           /usr/bin/ld: /opt/rustwide/target/debug/deps/libcore_foundation-843a82fb29d2d104.rlib(core_foundation-843a82fb29d2d104.core_foundation.46tj7tvf-cgu.5.rcgu.o): in function `<core_foundation::number::CFNumber as core::ops::drop::Drop>::drop':
[INFO] [stdout]           /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/core-foundation-0.6.4/src/lib.rs:67: undefined reference to `CFRelease'
[INFO] [stdout]           /usr/bin/ld: /opt/rustwide/target/debug/deps/libcore_foundation-843a82fb29d2d104.rlib(core_foundation-843a82fb29d2d104.core_foundation.46tj7tvf-cgu.6.rcgu.o): in function `<core_foundation::string::CFString as core::ops::drop::Drop>::drop':
[INFO] [stdout]           /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/core-foundation-0.6.4/src/lib.rs:67: undefined reference to `CFRelease'
[INFO] [stdout]           collect2: error: ld returned 1 exit status
[INFO] [stdout]           
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `letty`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "0db34c994d62f44ee6c23c5a49f00625cec57239671c07ae6fc5a8d5cc849cea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0db34c994d62f44ee6c23c5a49f00625cec57239671c07ae6fc5a8d5cc849cea", kill_on_drop: false }`
[INFO] [stdout] 0db34c994d62f44ee6c23c5a49f00625cec57239671c07ae6fc5a8d5cc849cea