[INFO] updating cached repository https://github.com/cassaundra/backlight
[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] 36bd9a0740ad2737fdf5554396abb750a67b3114
[INFO] testing cassaundra/backlight against beta-2019-09-28 for beta-1.39-1
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcassaundra%2Fbacklight" "work/builds/worker-6/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/cassaundra/backlight 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/cassaundra/backlight
[INFO] finished tweaking git repo https://github.com/cassaundra/backlight
[INFO] tweaked toml for git repo https://github.com/cassaundra/backlight written to work/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/cassaundra/backlight 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-6/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-6/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] aee29a6b0211009e4385bef40f64ba18c3eda7121e96e76fcc8ca6b8448b2f7f
[INFO] running `"docker" "start" "-a" "aee29a6b0211009e4385bef40f64ba18c3eda7121e96e76fcc8ca6b8448b2f7f"`
[INFO] [stderr]    Compiling scrap v0.5.0
[INFO] [stderr]    Compiling launchpad v1.0.0 (https://github.com/cassaundra/launch-rs.git#105cf8ef)
[INFO] [stderr]    Compiling backlight v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused variable: `count`
[INFO] [stderr]   --> src/main.rs:35:7
[INFO] [stderr]    |
[INFO] [stderr] 35 |         let count = (buffer.len() / 4) as u128;
[INFO] [stderr]    |             ^^^^^ help: consider prefixing with an underscore: `_count`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:14:2
[INFO] [stderr]    |
[INFO] [stderr] 14 |     launchpad.light_all_raw(0);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:74:5
[INFO] [stderr]    |
[INFO] [stderr] 74 |                 launchpad.light_single(7 - pad_x as u8, 7 - pad_y as u8, &color);
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[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/backlight-75ee8d683d8885b9.backlight.5nmu8zru-cgu.0.rcgu.o" "/opt/rustwide/target/debug/deps/backlight-75ee8d683d8885b9.backlight.5nmu8zru-cgu.1.rcgu.o" "/opt/rustwide/target/debug/deps/backlight-75ee8d683d8885b9.backlight.5nmu8zru-cgu.10.rcgu.o" "/opt/rustwide/target/debug/deps/backlight-75ee8d683d8885b9.backlight.5nmu8zru-cgu.11.rcgu.o" "/opt/rustwide/target/debug/deps/backlight-75ee8d683d8885b9.backlight.5nmu8zru-cgu.12.rcgu.o" "/opt/rustwide/target/debug/deps/backlight-75ee8d683d8885b9.backlight.5nmu8zru-cgu.13.rcgu.o" "/opt/rustwide/target/debug/deps/backlight-75ee8d683d8885b9.backlight.5nmu8zru-cgu.2.rcgu.o" "/opt/rustwide/target/debug/deps/backlight-75ee8d683d8885b9.backlight.5nmu8zru-cgu.3.rcgu.o" "/opt/rustwide/target/debug/deps/backlight-75ee8d683d8885b9.backlight.5nmu8zru-cgu.4.rcgu.o" "/opt/rustwide/target/debug/deps/backlight-75ee8d683d8885b9.backlight.5nmu8zru-cgu.5.rcgu.o" "/opt/rustwide/target/debug/deps/backlight-75ee8d683d8885b9.backlight.5nmu8zru-cgu.6.rcgu.o" "/opt/rustwide/target/debug/deps/backlight-75ee8d683d8885b9.backlight.5nmu8zru-cgu.7.rcgu.o" "/opt/rustwide/target/debug/deps/backlight-75ee8d683d8885b9.backlight.5nmu8zru-cgu.8.rcgu.o" "/opt/rustwide/target/debug/deps/backlight-75ee8d683d8885b9.backlight.5nmu8zru-cgu.9.rcgu.o" "-o" "/opt/rustwide/target/debug/deps/backlight-75ee8d683d8885b9" "/opt/rustwide/target/debug/deps/backlight-75ee8d683d8885b9.2n661shp6b67u958.rcgu.o" "-Wl,--gc-sections" "-pie" "-Wl,-zrelro" "-Wl,-znow" "-nodefaultlibs" "-L" "/opt/rustwide/target/debug/deps" "-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" "/opt/rustwide/target/debug/deps/liblaunchpad-b885428c22dcc2b1.rlib" "/opt/rustwide/target/debug/deps/libportmidi-d59d0edc93510103.rlib" "/opt/rustwide/target/debug/deps/libpalette-6ef1d89202c3eddb.rlib" "/opt/rustwide/target/debug/deps/libphf-1bd73c880216984c.rlib" "/opt/rustwide/target/debug/deps/libphf_shared-877376db81d2fcce.rlib" "/opt/rustwide/target/debug/deps/libsiphasher-313eabf8a1722ae5.rlib" "/opt/rustwide/target/debug/deps/libnum_traits-bb27b758b3871057.rlib" "/opt/rustwide/target/debug/deps/libapprox-18d240db38cea552.rlib" "/opt/rustwide/target/debug/deps/libscrap-fae58f073ef0fa2f.rlib" "/opt/rustwide/target/debug/deps/liblibc-1a96662f1f5639b3.rlib" "/opt/rustwide/target/debug/deps/libcfg_if-7390b7ae06eb302e.rlib" "-Wl,--start-group" "/opt/rustwide/rustup-home/toolchains/beta-2019-09-28-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-db812c66f862af4c.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2019-09-28-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libpanic_unwind-e7871a21575d5ff7.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2019-09-28-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libhashbrown-2f2c581bc0d759e6.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2019-09-28-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_alloc-35731cabc05dc8a0.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2019-09-28-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libbacktrace-36477394541292db.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2019-09-28-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libbacktrace_sys-8b706b170c1272d8.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2019-09-28-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_demangle-801dbb3043ccf581.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2019-09-28-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libunwind-a32aa66ce6f72b21.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2019-09-28-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcfg_if-d00ea3bfb2bb6c00.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2019-09-28-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/liblibc-d2c6ebe88c3e113c.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2019-09-28-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/liballoc-df74f62f6bb60621.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2019-09-28-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_core-2170473575daeedb.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2019-09-28-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-1a08089bbddc4f51.rlib" "-Wl,--end-group" "/opt/rustwide/rustup-home/toolchains/beta-2019-09-28-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcompiler_builtins-f8f562e5472ad5c3.rlib" "-Wl,-Bdynamic" "-lportmidi" "-lxcb" "-lxcb-shm" "-lxcb-randr" "-lutil" "-lutil" "-ldl" "-lrt" "-lpthread" "-lgcc_s" "-lc" "-lm" "-lrt" "-lpthread" "-lutil" "-lutil"
[INFO] [stderr]   = note: /usr/bin/ld: cannot find -lportmidi
[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 `backlight`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "aee29a6b0211009e4385bef40f64ba18c3eda7121e96e76fcc8ca6b8448b2f7f"`
[INFO] running `"docker" "rm" "-f" "aee29a6b0211009e4385bef40f64ba18c3eda7121e96e76fcc8ca6b8448b2f7f"`
[INFO] [stdout] aee29a6b0211009e4385bef40f64ba18c3eda7121e96e76fcc8ca6b8448b2f7f