[INFO] fetching crate prost 0.7.0...
[INFO] testing prost-0.7.0 against 1.49.0 for beta-1.50-1
[INFO] extracting crate prost 0.7.0 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate prost 0.7.0 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 prost 0.7.0
[INFO] finished tweaking crates.io crate prost 0.7.0
[INFO] tweaked toml for crates.io crate prost 0.7.0 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[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-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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] 13c33ddb162ac9829c1b7642ef0a74bd5a0f609f1af72009a57f47be810ca6ca
[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" "13c33ddb162ac9829c1b7642ef0a74bd5a0f609f1af72009a57f47be810ca6ca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "13c33ddb162ac9829c1b7642ef0a74bd5a0f609f1af72009a57f47be810ca6ca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "13c33ddb162ac9829c1b7642ef0a74bd5a0f609f1af72009a57f47be810ca6ca", kill_on_drop: false }`
[INFO] [stdout] 13c33ddb162ac9829c1b7642ef0a74bd5a0f609f1af72009a57f47be810ca6ca
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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] 56cb6b9bb32336693e87554fb519f897d52c772bdcd16a089c089ffdbae1ab7c
[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" "56cb6b9bb32336693e87554fb519f897d52c772bdcd16a089c089ffdbae1ab7c", kill_on_drop: false }`
[INFO] [stderr]    Compiling bytes v1.0.0
[INFO] [stderr]    Compiling prost-derive v0.7.0
[INFO] [stderr]    Compiling prost v0.7.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.07s
[INFO] running `Command { std: "docker" "inspect" "56cb6b9bb32336693e87554fb519f897d52c772bdcd16a089c089ffdbae1ab7c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "56cb6b9bb32336693e87554fb519f897d52c772bdcd16a089c089ffdbae1ab7c", kill_on_drop: false }`
[INFO] [stdout] 56cb6b9bb32336693e87554fb519f897d52c772bdcd16a089c089ffdbae1ab7c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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] bb650476a37dd62de2836b6c8c86a0facbee8487712185acdd326c51ed45bc1c
[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" "bb650476a37dd62de2836b6c8c86a0facbee8487712185acdd326c51ed45bc1c", kill_on_drop: false }`
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling regex v1.4.2
[INFO] [stderr]    Compiling getrandom v0.2.1
[INFO] [stderr]    Compiling wait-timeout v0.2.0
[INFO] [stderr]    Compiling rand_xorshift v0.2.0
[INFO] [stderr]    Compiling env_logger v0.8.2
[INFO] [stderr]    Compiling rand_core v0.6.0
[INFO] [stderr]    Compiling rusty-fork v0.3.0
[INFO] [stderr]    Compiling rand_chacha v0.3.0
[INFO] [stderr]    Compiling rand v0.8.0
[INFO] [stderr]    Compiling regex-automata v0.1.9
[INFO] [stderr]    Compiling proptest v0.10.1
[INFO] [stderr]    Compiling bstr v0.2.14
[INFO] [stderr]    Compiling csv v1.1.5
[INFO] [stderr]    Compiling criterion v0.3.3
[INFO] [stderr]    Compiling prost v0.7.0 (/opt/rustwide/workdir)
[INFO] [stderr] error: could not compile `prost`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name prost --edition=2018 src/lib.rs --error-format=json --json=diagnostic-rendered-ansi --emit=dep-info,link -C embed-bitcode=no -C debuginfo=2 --test --cfg 'feature="default"' --cfg 'feature="prost-derive"' --cfg 'feature="std"' -C metadata=abb82eab5e53e097 -C extra-filename=-abb82eab5e53e097 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern bytes=/opt/rustwide/target/debug/deps/libbytes-3518eb07ea4e2d02.rlib --extern criterion=/opt/rustwide/target/debug/deps/libcriterion-2b13b8ceafdd2b60.rlib --extern env_logger=/opt/rustwide/target/debug/deps/libenv_logger-b23ac52474171dc0.rlib --extern log=/opt/rustwide/target/debug/deps/liblog-e85f58044ae91ffe.rlib --extern proptest=/opt/rustwide/target/debug/deps/libproptest-293b377716fbab06.rlib --extern prost_derive=/opt/rustwide/target/debug/deps/libprost_derive-f5747b24300ee49d.so --extern rand=/opt/rustwide/target/debug/deps/librand-c4e449ee288d1792.rlib --cap-lints=warn` (signal: 9, SIGKILL: kill)
[INFO] running `Command { std: "docker" "inspect" "bb650476a37dd62de2836b6c8c86a0facbee8487712185acdd326c51ed45bc1c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bb650476a37dd62de2836b6c8c86a0facbee8487712185acdd326c51ed45bc1c", kill_on_drop: false }`
[INFO] [stdout] bb650476a37dd62de2836b6c8c86a0facbee8487712185acdd326c51ed45bc1c