[INFO] fetching crate mediasoup 0.3.1...
[INFO] testing mediasoup-0.3.1 against 1.49.0 for beta-1.50-1
[INFO] extracting crate mediasoup 0.3.1 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate mediasoup 0.3.1 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 crates.io crate mediasoup 0.3.1
[INFO] finished tweaking crates.io crate mediasoup 0.3.1
[INFO] tweaked toml for crates.io crate mediasoup 0.3.1 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate crates.io crate mediasoup 0.3.1 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] b301f42c4718efef14d40d0c99ad7fa531bcdd1aa8f71e0d49a0515b7a42f65a
[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" "b301f42c4718efef14d40d0c99ad7fa531bcdd1aa8f71e0d49a0515b7a42f65a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b301f42c4718efef14d40d0c99ad7fa531bcdd1aa8f71e0d49a0515b7a42f65a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b301f42c4718efef14d40d0c99ad7fa531bcdd1aa8f71e0d49a0515b7a42f65a", kill_on_drop: false }`
[INFO] [stdout] b301f42c4718efef14d40d0c99ad7fa531bcdd1aa8f71e0d49a0515b7a42f65a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] ae5fb1a367e4fd9aeea90ec5ed77c9f18ff09cd7751947faf532afcb9703961a
[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" "ae5fb1a367e4fd9aeea90ec5ed77c9f18ff09cd7751947faf532afcb9703961a", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.81
[INFO] [stderr]    Compiling syn v1.0.57
[INFO] [stderr]    Compiling cache-padded v1.1.1
[INFO] [stderr]    Compiling parking v2.0.0
[INFO] [stderr]    Compiling waker-fn v1.1.0
[INFO] [stderr]    Compiling fastrand v1.4.0
[INFO] [stderr]    Compiling event-listener v2.5.1
[INFO] [stderr]    Compiling futures-io v0.3.8
[INFO] [stderr]    Compiling vec-arena v1.0.0
[INFO] [stderr]    Compiling async-task v4.0.3
[INFO] [stderr]    Compiling atomic-waker v1.0.0
[INFO] [stderr]    Compiling futures-micro v0.3.1
[INFO] [stderr]    Compiling bytes v1.0.0
[INFO] [stderr]    Compiling paste-impl v0.1.18
[INFO] [stderr]    Compiling concurrent-queue v1.2.2
[INFO] [stderr]    Compiling async-oneshot v0.4.2
[INFO] [stderr]    Compiling futures-lite v1.11.3
[INFO] [stderr]    Compiling async-lock v2.3.0
[INFO] [stderr]    Compiling async-mutex v1.4.0
[INFO] [stderr]    Compiling async-channel v1.5.1
[INFO] [stderr]    Compiling paste v0.1.18
[INFO] [stderr]    Compiling bitpattern v0.1.0
[INFO] [stderr]    Compiling blocking v1.0.2
[INFO] [stderr]    Compiling async-executor v1.4.0
[INFO] [stderr]    Compiling async-fs v1.5.0
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling nb-connect v1.0.2
[INFO] [stderr]    Compiling polling v2.0.2
[INFO] [stderr]    Compiling parking_lot_core v0.8.2
[INFO] [stderr]    Compiling signal-hook-registry v1.3.0
[INFO] [stderr]    Compiling nix v0.19.1
[INFO] [stderr]    Compiling async-io v1.3.1
[INFO] [stderr]    Compiling signal-hook v0.1.17
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling async-process v1.0.1
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling serde_derive v1.0.118
[INFO] [stderr]    Compiling thiserror-impl v1.0.23
[INFO] [stderr]    Compiling async-trait v0.1.42
[INFO] [stderr]    Compiling thiserror v1.0.23
[INFO] [stderr]    Compiling h264-profile-level-id v0.1.1
[INFO] [stderr]    Compiling serde v1.0.118
[INFO] [stderr]    Compiling lock_api v0.4.2
[INFO] [stderr]    Compiling serde_json v1.0.61
[INFO] [stderr]    Compiling uuid v0.8.1
[INFO] [stderr]    Compiling parking_lot v0.11.1
[INFO] [stderr]    Compiling event-listener-primitives v0.2.2
[INFO] [stderr]    Compiling mediasoup v0.3.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 47s
[INFO] running `Command { std: "docker" "inspect" "ae5fb1a367e4fd9aeea90ec5ed77c9f18ff09cd7751947faf532afcb9703961a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ae5fb1a367e4fd9aeea90ec5ed77c9f18ff09cd7751947faf532afcb9703961a", kill_on_drop: false }`
[INFO] [stdout] ae5fb1a367e4fd9aeea90ec5ed77c9f18ff09cd7751947faf532afcb9703961a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 49e5cffd13cd93428b36b8feab73bfdbc178da8993b5531415f7227da51ef6c4
[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" "49e5cffd13cd93428b36b8feab73bfdbc178da8993b5531415f7227da51ef6c4", kill_on_drop: false }`
[INFO] [stderr]    Compiling copyless v0.1.5
[INFO] [stderr]    Compiling either v1.6.1
[INFO] [stderr]    Compiling match_cfg v0.1.0
[INFO] [stderr]    Compiling linked-hash-map v0.5.3
[INFO] [stderr]    Compiling humantime v2.0.1
[INFO] [stderr]    Compiling futures-task v0.3.8
[INFO] [stderr]    Compiling standback v0.2.14
[INFO] [stderr]    Compiling time v0.2.23
[INFO] [stderr]    Compiling cookie v0.14.3
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]    Compiling bytestring v0.1.5
[INFO] [stderr]    Compiling brotli-sys v0.3.2
[INFO] [stderr]    Compiling net2 v0.2.37
[INFO] [stderr]    Compiling iovec v0.1.4
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling socket2 v0.3.19
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling tracing v0.1.22
[INFO] [stderr]    Compiling hostname v0.3.1
[INFO] [stderr]    Compiling backtrace v0.3.55
[INFO] [stderr]    Compiling flate2 v1.0.19
[INFO] [stderr]    Compiling pin-project-internal v1.0.2
[INFO] [stderr]    Compiling futures-macro v0.3.8
[INFO] [stderr]    Compiling pin-project-internal v0.4.27
[INFO] [stderr]    Compiling derive_more v0.99.11
[INFO] [stderr]    Compiling actix-macros v0.1.3
[INFO] [stderr]    Compiling enum-as-inner v0.3.3
[INFO] [stderr]    Compiling actix-web-codegen v0.4.0
[INFO] [stderr]    Compiling actix_derive v0.5.0
[INFO] [stderr]    Compiling lru-cache v0.1.2
[INFO] [stderr]    Compiling env_logger v0.8.2
[INFO] [stderr]    Compiling mio v0.6.23
[INFO] [stderr]    Compiling resolv-conf v0.7.0
[INFO] [stderr]    Compiling threadpool v1.8.1
[INFO] [stderr]    Compiling serde_urlencoded v0.7.0
[INFO] [stderr]    Compiling actix-router v0.2.5
[INFO] [stderr]    Compiling time-macros-impl v0.1.1
[INFO] [stderr]    Compiling mio-uds v0.6.8
[INFO] [stderr]    Compiling crossbeam-channel v0.4.4
[INFO] [stderr]    Compiling tokio v0.2.24
[INFO] [stderr]    Compiling time-macros v0.1.1
[INFO] [stderr]    Compiling pin-project v1.0.2
[INFO] [stderr]    Compiling futures-util v0.3.8
[INFO] [stderr]    Compiling pin-project v0.4.27
[INFO] [stderr]    Compiling tracing-futures v0.2.4
[INFO] [stderr]    Compiling actix-threadpool v0.3.3
[INFO] [stderr]    Compiling brotli2 v0.3.2
[INFO] [stderr]    Compiling tokio-util v0.3.1
[INFO] [stderr]    Compiling actix-codec v0.3.0
[INFO] [stderr]    Compiling actix-rt v1.1.1
[INFO] [stderr]    Compiling actix-service v1.0.6
[INFO] [stderr]    Compiling futures v0.3.8
[INFO] [stderr]    Compiling h2 v0.2.7
[INFO] [stderr]    Compiling trust-dns-proto v0.19.6
[INFO] [stderr]    Compiling actix-utils v2.0.0
[INFO] [stderr]    Compiling actix-server v1.0.4
[INFO] [stderr]    Compiling actix-tls v2.0.0
[INFO] [stderr]    Compiling actix-testing v1.0.1
[INFO] [stderr]    Compiling trust-dns-resolver v0.19.6
[INFO] [stderr]    Compiling actix-connect v2.0.0
[INFO] [stderr]    Compiling actix v0.10.0
[INFO] [stderr]    Compiling actix-http v2.2.0
[INFO] [stderr]    Compiling awc v2.0.3
[INFO] [stderr]    Compiling actix-web v3.3.2
[INFO] [stderr]    Compiling actix-web-actors v3.0.0
[INFO] [stderr]    Compiling mediasoup v0.3.1 (/opt/rustwide/workdir)
[INFO] [stderr] error: could not compile `mediasoup`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name audio_level_observer --edition=2018 tests/audio_level_observer.rs --error-format=json --json=diagnostic-rendered-ansi --emit=dep-info,link -C embed-bitcode=no -C debuginfo=2 --test -C metadata=127bd3892019da77 -C extra-filename=-127bd3892019da77 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern actix=/opt/rustwide/target/debug/deps/libactix-72d7fc1b968e14b4.rlib --extern actix_web=/opt/rustwide/target/debug/deps/libactix_web-c545ea2b8aad3b93.rlib --extern actix_web_actors=/opt/rustwide/target/debug/deps/libactix_web_actors-04fce68dad350718.rlib --extern async_channel=/opt/rustwide/target/debug/deps/libasync_channel-ce38df29c7023a3e.rlib --extern async_executor=/opt/rustwide/target/debug/deps/libasync_executor-fa4ebfa3f1f16a04.rlib --extern async_fs=/opt/rustwide/target/debug/deps/libasync_fs-c7f478a1b43de827.rlib --extern async_io=/opt/rustwide/target/debug/deps/libasync_io-755899e4e834197a.rlib --extern async_mutex=/opt/rustwide/target/debug/deps/libasync_mutex-ad6195bfa15f12bd.rlib --extern async_oneshot=/opt/rustwide/target/debug/deps/libasync_oneshot-196c7843133e52ac.rlib --extern async_process=/opt/rustwide/target/debug/deps/libasync_process-054c5e82aae0d225.rlib --extern async_trait=/opt/rustwide/target/debug/deps/libasync_trait-eba4bebf725f65ae.so --extern bytes=/opt/rustwide/target/debug/deps/libbytes-ef37f5370a7475ae.rlib --extern env_logger=/opt/rustwide/target/debug/deps/libenv_logger-534c2b6ec12b98d5.rlib --extern event_listener_primitives=/opt/rustwide/target/debug/deps/libevent_listener_primitives-682aae3aea7ec243.rlib --extern fastrand=/opt/rustwide/target/debug/deps/libfastrand-d6aec19f4fd85183.rlib --extern futures_lite=/opt/rustwide/target/debug/deps/libfutures_lite-16848b44ae9cb397.rlib --extern h264_profile_level_id=/opt/rustwide/target/debug/deps/libh264_profile_level_id-b5403839f25eadb6.rlib --extern libc=/opt/rustwide/target/debug/deps/liblibc-5b249bd3811ba0bd.rlib --extern log=/opt/rustwide/target/debug/deps/liblog-e85f58044ae91ffe.rlib --extern mediasoup=/opt/rustwide/target/debug/deps/libmediasoup-d55bf7beee756d25.rlib --extern nix=/opt/rustwide/target/debug/deps/libnix-432deacad78d717f.rlib --extern once_cell=/opt/rustwide/target/debug/deps/libonce_cell-835dc9dc28e7c407.rlib --extern parking_lot=/opt/rustwide/target/debug/deps/libparking_lot-96b52314023a59a8.rlib --extern regex=/opt/rustwide/target/debug/deps/libregex-62e055e6c3a1f4aa.rlib --extern serde=/opt/rustwide/target/debug/deps/libserde-4a29e9f3d7140331.rlib --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-69a05d1f69a4334d.rlib --extern thiserror=/opt/rustwide/target/debug/deps/libthiserror-3a719a0fb4fb7fdd.rlib --extern uuid=/opt/rustwide/target/debug/deps/libuuid-427312d6dace4ea2.rlib --cap-lints=warn -L native=/opt/rustwide/target/debug/build/brotli-sys-ab706ca0d133ec2a/out` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "49e5cffd13cd93428b36b8feab73bfdbc178da8993b5531415f7227da51ef6c4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "49e5cffd13cd93428b36b8feab73bfdbc178da8993b5531415f7227da51ef6c4", kill_on_drop: false }`
[INFO] [stdout] 49e5cffd13cd93428b36b8feab73bfdbc178da8993b5531415f7227da51ef6c4