[INFO] cloning repository https://github.com/cuiter/aicourse
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/cuiter/aicourse" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcuiter%2Faicourse", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcuiter%2Faicourse'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 407cbf21dfefe91dea0ac1aafee1ac03cbf88e81
[INFO] testing cuiter/aicourse against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcuiter%2Faicourse" "/workspace/builds/worker-75/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-75/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/cuiter/aicourse on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/cuiter/aicourse
[INFO] finished tweaking git repo https://github.com/cuiter/aicourse
[INFO] tweaked toml for git repo https://github.com/cuiter/aicourse written to /workspace/builds/worker-75/source/Cargo.toml
[INFO] crate git repo https://github.com/cuiter/aicourse already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded rscam v0.5.5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-75/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-75/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c21620e97087093bc3f9411913da1ee2267ec9022a1bf3a1366ab11550b3949e
[INFO] running `Command { std: "docker" "start" "-a" "c21620e97087093bc3f9411913da1ee2267ec9022a1bf3a1366ab11550b3949e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c21620e97087093bc3f9411913da1ee2267ec9022a1bf3a1366ab11550b3949e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c21620e97087093bc3f9411913da1ee2267ec9022a1bf3a1366ab11550b3949e", kill_on_drop: false }`
[INFO] [stdout] c21620e97087093bc3f9411913da1ee2267ec9022a1bf3a1366ab11550b3949e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-75/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-75/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cc274ad7da2333fede07bd40016d867a8cc08098b69a15199edb9e6b132453b6
[INFO] running `Command { std: "docker" "start" "-a" "cc274ad7da2333fede07bd40016d867a8cc08098b69a15199edb9e6b132453b6", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]    Compiling libc v0.2.74
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling rayon-core v1.7.1
[INFO] [stderr]    Compiling scopeguard v1.1.0
[INFO] [stderr]    Compiling version-compare v0.0.10
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling ppv-lite86 v0.2.8
[INFO] [stderr]    Compiling ndarray v0.13.1
[INFO] [stderr]    Compiling rawpointer v0.2.1
[INFO] [stderr]    Compiling either v1.6.0
[INFO] [stderr]    Compiling sdl2 v0.34.2
[INFO] [stderr]    Compiling unicode-width v0.1.8
[INFO] [stderr]    Compiling vec_map v0.8.2
[INFO] [stderr]    Compiling matrixmultiply v0.2.3
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling sdl2-sys v0.34.2
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]    Compiling memoffset v0.5.5
[INFO] [stderr]    Compiling crossbeam-epoch v0.8.2
[INFO] [stderr]    Compiling num-traits v0.2.12
[INFO] [stderr]    Compiling num-complex v0.2.4
[INFO] [stderr]    Compiling num-integer v0.1.43
[INFO] [stderr]    Compiling rayon v1.3.1
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling rscam v0.5.5
[INFO] [stderr]    Compiling clap v2.33.3
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling rand_pcg v0.2.1
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling crossbeam-queue v0.2.3
[INFO] [stderr]    Compiling crossbeam-deque v0.7.3
[INFO] [stderr]    Compiling aicourse v0.1.0 (/opt/rustwide/workdir/aicourse)
[INFO] [stderr]    Compiling aicourse-train v0.1.0 (/opt/rustwide/workdir/aicourse-train)
[INFO] [stderr]    Compiling aicourse-webcam v0.1.0 (/opt/rustwide/workdir/aicourse-webcam)
[INFO] [stdout] error: linking with `cc` failed: exit status: 1
[INFO] [stdout]   |
[INFO] [stdout]   = note: "cc" "-m64" "/opt/rustwide/target/debug/deps/aicourse_webcam-1294818bc4a527a8.aicourse_webcam.4a8c2662-cgu.0.rcgu.o" "/opt/rustwide/target/debug/deps/aicourse_webcam-1294818bc4a527a8.aicourse_webcam.4a8c2662-cgu.1.rcgu.o" "/opt/rustwide/target/debug/deps/aicourse_webcam-1294818bc4a527a8.aicourse_webcam.4a8c2662-cgu.10.rcgu.o" "/opt/rustwide/target/debug/deps/aicourse_webcam-1294818bc4a527a8.aicourse_webcam.4a8c2662-cgu.11.rcgu.o" "/opt/rustwide/target/debug/deps/aicourse_webcam-1294818bc4a527a8.aicourse_webcam.4a8c2662-cgu.12.rcgu.o" "/opt/rustwide/target/debug/deps/aicourse_webcam-1294818bc4a527a8.aicourse_webcam.4a8c2662-cgu.13.rcgu.o" "/opt/rustwide/target/debug/deps/aicourse_webcam-1294818bc4a527a8.aicourse_webcam.4a8c2662-cgu.14.rcgu.o" "/opt/rustwide/target/debug/deps/aicourse_webcam-1294818bc4a527a8.aicourse_webcam.4a8c2662-cgu.15.rcgu.o" "/opt/rustwide/target/debug/deps/aicourse_webcam-1294818bc4a527a8.aicourse_webcam.4a8c2662-cgu.2.rcgu.o" "/opt/rustwide/target/debug/deps/aicourse_webcam-1294818bc4a527a8.aicourse_webcam.4a8c2662-cgu.3.rcgu.o" "/opt/rustwide/target/debug/deps/aicourse_webcam-1294818bc4a527a8.aicourse_webcam.4a8c2662-cgu.4.rcgu.o" "/opt/rustwide/target/debug/deps/aicourse_webcam-1294818bc4a527a8.aicourse_webcam.4a8c2662-cgu.5.rcgu.o" "/opt/rustwide/target/debug/deps/aicourse_webcam-1294818bc4a527a8.aicourse_webcam.4a8c2662-cgu.6.rcgu.o" "/opt/rustwide/target/debug/deps/aicourse_webcam-1294818bc4a527a8.aicourse_webcam.4a8c2662-cgu.7.rcgu.o" "/opt/rustwide/target/debug/deps/aicourse_webcam-1294818bc4a527a8.aicourse_webcam.4a8c2662-cgu.8.rcgu.o" "/opt/rustwide/target/debug/deps/aicourse_webcam-1294818bc4a527a8.aicourse_webcam.4a8c2662-cgu.9.rcgu.o" "/opt/rustwide/target/debug/deps/aicourse_webcam-1294818bc4a527a8.31c9rz93gxbueii0.rcgu.o" "-Wl,--as-needed" "-L" "/opt/rustwide/target/debug/deps" "-L" "/opt/rustwide/rustup-home/toolchains/1.55.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-Wl,-Bstatic" "/opt/rustwide/target/debug/deps/librscam-563bdfe5e8b4511d.rlib" "/opt/rustwide/target/debug/deps/libaicourse-408f74c2b8e0b687.rlib" "/opt/rustwide/target/debug/deps/librand_pcg-00c9746fcf8566e6.rlib" "/opt/rustwide/target/debug/deps/librand-f1cd6e1dca158893.rlib" "/opt/rustwide/target/debug/deps/librand_chacha-d7677a12cb9a7a59.rlib" "/opt/rustwide/target/debug/deps/libppv_lite86-c78691db1e7711de.rlib" "/opt/rustwide/target/debug/deps/librand_core-58f3a77fa006be60.rlib" "/opt/rustwide/target/debug/deps/libgetrandom-5c5385a884f1637b.rlib" "/opt/rustwide/target/debug/deps/librayon-9de4a332ec018b44.rlib" "/opt/rustwide/target/debug/deps/librayon_core-5436fbca2363e3a8.rlib" "/opt/rustwide/target/debug/deps/libnum_cpus-7f8bd0e2e82eca52.rlib" "/opt/rustwide/target/debug/deps/libcrossbeam_deque-442c0515116e876e.rlib" "/opt/rustwide/target/debug/deps/libcrossbeam_epoch-77b7f3b38aa4fb47.rlib" "/opt/rustwide/target/debug/deps/libscopeguard-a57a6a52cef5676e.rlib" "/opt/rustwide/target/debug/deps/libmemoffset-51c3aba53a7b9c4b.rlib" "/opt/rustwide/target/debug/deps/libcrossbeam_queue-71935456e5fa199f.rlib" "/opt/rustwide/target/debug/deps/libcrossbeam_utils-506755c7eca3e021.rlib" "/opt/rustwide/target/debug/deps/libmaybe_uninit-2b57d9522de422df.rlib" "/opt/rustwide/target/debug/deps/libcfg_if-4dc40f94662accb2.rlib" "/opt/rustwide/target/debug/deps/libeither-2903a57827901046.rlib" "/opt/rustwide/target/debug/deps/libndarray-4631700acf0ac22b.rlib" "/opt/rustwide/target/debug/deps/libmatrixmultiply-791d7c3879ad8994.rlib" "/opt/rustwide/target/debug/deps/libnum_complex-870c09ca0fc62bca.rlib" "/opt/rustwide/target/debug/deps/libnum_integer-95e650b56462002c.rlib" "/opt/rustwide/target/debug/deps/libnum_traits-d6c27efbae9f8a85.rlib" "/opt/rustwide/target/debug/deps/librawpointer-6aa2ca10ed178081.rlib" "/opt/rustwide/target/debug/deps/libsdl2-b03145d781d3cccc.rlib" "/opt/rustwide/target/debug/deps/libsdl2_sys-ee57d41ca376613e.rlib" "/opt/rustwide/target/debug/deps/libbitflags-117d41ac256572da.rlib" "/opt/rustwide/target/debug/deps/liblazy_static-df981c5871754530.rlib" "/opt/rustwide/target/debug/deps/liblibc-1c69ea8e90b5be58.rlib" "-Wl,--start-group" "/opt/rustwide/rustup-home/toolchains/1.55.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-008055cc7d873802.rlib" "/opt/rustwide/rustup-home/toolchains/1.55.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libpanic_unwind-06f01ac2578bda94.rlib" "/opt/rustwide/rustup-home/toolchains/1.55.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libminiz_oxide-f9a3c3274a1835e0.rlib" "/opt/rustwide/rustup-home/toolchains/1.55.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libadler-d4cbb754ee9f4daa.rlib" "/opt/rustwide/rustup-home/toolchains/1.55.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libobject-95c14e1c1e3ebcc4.rlib" "/opt/rustwide/rustup-home/toolchains/1.55.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libaddr2line-d489f0ca872880cc.rlib" "/opt/rustwide/rustup-home/toolchains/1.55.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libgimli-75f07df0b18fea39.rlib" "/opt/rustwide/rustup-home/toolchains/1.55.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd_detect-0c35b278736219a2.rlib" "/opt/rustwide/rustup-home/toolchains/1.55.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_demangle-e530649c9a06e3c6.rlib" "/opt/rustwide/rustup-home/toolchains/1.55.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libhashbrown-6b148909d375a785.rlib" "/opt/rustwide/rustup-home/toolchains/1.55.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_alloc-cd15fa647f4775d1.rlib" "/opt/rustwide/rustup-home/toolchains/1.55.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libunwind-74be3a703f788ba2.rlib" "/opt/rustwide/rustup-home/toolchains/1.55.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcfg_if-8f2c5b445c28b2e3.rlib" "/opt/rustwide/rustup-home/toolchains/1.55.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/liblibc-8480e85e0be96197.rlib" "/opt/rustwide/rustup-home/toolchains/1.55.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/liballoc-ac23a75f6f42004e.rlib" "/opt/rustwide/rustup-home/toolchains/1.55.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_core-557ba8776e04d182.rlib" "/opt/rustwide/rustup-home/toolchains/1.55.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-4beb03d03503c439.rlib" "-Wl,--end-group" "/opt/rustwide/rustup-home/toolchains/1.55.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcompiler_builtins-dd7db1bec6909f24.rlib" "-Wl,-Bdynamic" "-lv4l2" "-lSDL2" "-lutil" "-ldl" "-lutil" "-lgcc_s" "-lutil" "-lrt" "-lpthread" "-lm" "-ldl" "-lc" "-Wl,--eh-frame-hdr" "-Wl,-znoexecstack" "-L" "/opt/rustwide/rustup-home/toolchains/1.55.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-o" "/opt/rustwide/target/debug/deps/aicourse_webcam-1294818bc4a527a8" "-Wl,--gc-sections" "-pie" "-Wl,-zrelro" "-Wl,-znow" "-nodefaultlibs"
[INFO] [stdout]   = note: /usr/bin/ld: cannot find -lv4l2
[INFO] [stdout]           collect2: error: ld returned 1 exit status
[INFO] [stdout]           
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `aicourse-webcam` due to 2 previous errors
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "cc274ad7da2333fede07bd40016d867a8cc08098b69a15199edb9e6b132453b6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cc274ad7da2333fede07bd40016d867a8cc08098b69a15199edb9e6b132453b6", kill_on_drop: false }`
[INFO] [stdout] cc274ad7da2333fede07bd40016d867a8cc08098b69a15199edb9e6b132453b6