[INFO] fetching crate ffav 4.3.12...
[INFO] testing ffav-4.3.12 against 1.55.0 for beta-1.56-1
[INFO] extracting crate ffav 4.3.12 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate ffav 4.3.12 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 crates.io crate ffav 4.3.12
[INFO] finished tweaking crates.io crate ffav 4.3.12
[INFO] tweaked toml for crates.io crate ffav 4.3.12 written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate crates.io crate ffav 4.3.12 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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] df75ecce581a39475b0c520b1f0a9f974f6a1e80bdd22869c0be9f6c3dadafbc
[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" "df75ecce581a39475b0c520b1f0a9f974f6a1e80bdd22869c0be9f6c3dadafbc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "df75ecce581a39475b0c520b1f0a9f974f6a1e80bdd22869c0be9f6c3dadafbc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "df75ecce581a39475b0c520b1f0a9f974f6a1e80bdd22869c0be9f6c3dadafbc", kill_on_drop: false }`
[INFO] [stdout] df75ecce581a39475b0c520b1f0a9f974f6a1e80bdd22869c0be9f6c3dadafbc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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] b844176a7f714fc9f1b0733a142af9225609c5fc2b1cc3b0255c0274922ba5a7
[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" "b844176a7f714fc9f1b0733a142af9225609c5fc2b1cc3b0255c0274922ba5a7", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.26
[INFO] [stderr]    Compiling bindgen v0.56.0
[INFO] [stderr]    Compiling ffav v4.3.12 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling clang-sys v1.2.0
[INFO] [stderr]    Compiling nom v5.1.2
[INFO] [stderr]    Compiling which v3.1.1
[INFO] [stderr]    Compiling env_logger v0.8.3
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling cexpr v0.4.0
[INFO] [stderr]    Compiling ffav-sys v4.3.4
[INFO] [stderr] error: could not compile `ffav-sys`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name build_script_build --edition=2018 /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/ffav-sys-4.3.4/build.rs --error-format=json --json=diagnostic-rendered-ansi --crate-type bin --emit=dep-info,link -C embed-bitcode=no -C debuginfo=2 --cfg 'feature="avcodec"' --cfg 'feature="avdevice"' --cfg 'feature="avfilter"' --cfg 'feature="avformat"' --cfg 'feature="avutil"' --cfg 'feature="swresample"' --cfg 'feature="swscale"' -C metadata=2058637b7e7592e9 -C extra-filename=-2058637b7e7592e9 --out-dir /opt/rustwide/target/debug/build/ffav-sys-2058637b7e7592e9 -L dependency=/opt/rustwide/target/debug/deps --extern bindgen=/opt/rustwide/target/debug/deps/libbindgen-e0cdeff51bec5779.rlib --extern cc=/opt/rustwide/target/debug/deps/libcc-103da4db0c9754b7.rlib --extern num_cpus=/opt/rustwide/target/debug/deps/libnum_cpus-4b5718b0b8cb4786.rlib --extern pkg_config=/opt/rustwide/target/debug/deps/libpkg_config-af60bb42056191f6.rlib --extern regex=/opt/rustwide/target/debug/deps/libregex-17cdeefc8882f7b8.rlib --cap-lints allow --cap-lints=warn` (signal: 9, SIGKILL: kill)
[INFO] running `Command { std: "docker" "inspect" "b844176a7f714fc9f1b0733a142af9225609c5fc2b1cc3b0255c0274922ba5a7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b844176a7f714fc9f1b0733a142af9225609c5fc2b1cc3b0255c0274922ba5a7", kill_on_drop: false }`
[INFO] [stdout] b844176a7f714fc9f1b0733a142af9225609c5fc2b1cc3b0255c0274922ba5a7