[INFO] fetching crate prost 0.8.0...
[INFO] testing prost-0.8.0 against beta-2021-09-08 for beta-1.56-1
[INFO] extracting crate prost 0.8.0 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate prost 0.8.0 on toolchain beta-2021-09-08
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate prost 0.8.0
[INFO] finished tweaking crates.io crate prost 0.8.0
[INFO] tweaked toml for crates.io crate prost 0.8.0 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c333ff09006734be451b3f1bf15662afda0d60979575aab7e671bbd2fb931be4
[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" "c333ff09006734be451b3f1bf15662afda0d60979575aab7e671bbd2fb931be4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c333ff09006734be451b3f1bf15662afda0d60979575aab7e671bbd2fb931be4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c333ff09006734be451b3f1bf15662afda0d60979575aab7e671bbd2fb931be4", kill_on_drop: false }`
[INFO] [stdout] c333ff09006734be451b3f1bf15662afda0d60979575aab7e671bbd2fb931be4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9b43983bd39cf3d3f32a283897a90c7254ec2806984d8f097adfaf548a92cba6
[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" "9b43983bd39cf3d3f32a283897a90c7254ec2806984d8f097adfaf548a92cba6", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling bytes v1.1.0
[INFO] [stderr]    Compiling prost-derive v0.8.0
[INFO] [stderr]    Compiling prost v0.8.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.45s
[INFO] running `Command { std: "docker" "inspect" "9b43983bd39cf3d3f32a283897a90c7254ec2806984d8f097adfaf548a92cba6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9b43983bd39cf3d3f32a283897a90c7254ec2806984d8f097adfaf548a92cba6", kill_on_drop: false }`
[INFO] [stdout] 9b43983bd39cf3d3f32a283897a90c7254ec2806984d8f097adfaf548a92cba6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+beta-2021-09-08" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e55754974f82fb224ae33666ff77a1aa9f11351275e55bbb1fba46c1a469f3d3
[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" "e55754974f82fb224ae33666ff77a1aa9f11351275e55bbb1fba46c1a469f3d3", kill_on_drop: false }`
[INFO] [stderr]    Compiling env_logger v0.8.4
[INFO] [stderr]    Compiling rand_xorshift v0.3.0
[INFO] [stderr]    Compiling rusty-fork v0.3.0
[INFO] [stderr]    Compiling criterion v0.3.5
[INFO] [stderr]    Compiling proptest v1.0.0
[INFO] [stderr]    Compiling prost v0.8.0 (/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=c6ae5591d0b19f94 -C extra-filename=-c6ae5591d0b19f94 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern bytes=/opt/rustwide/target/debug/deps/libbytes-82ecc31c23a50698.rlib --extern criterion=/opt/rustwide/target/debug/deps/libcriterion-d13a66c4cd4dc88b.rlib --extern env_logger=/opt/rustwide/target/debug/deps/libenv_logger-2a9b2d43112530a6.rlib --extern log=/opt/rustwide/target/debug/deps/liblog-e79d96be0b9672b0.rlib --extern proptest=/opt/rustwide/target/debug/deps/libproptest-c00f845e7dcfa08b.rlib --extern prost_derive=/opt/rustwide/target/debug/deps/libprost_derive-f453201e7c85c2ab.so --extern rand=/opt/rustwide/target/debug/deps/librand-103265e50e195195.rlib --cap-lints=warn` (signal: 9, SIGKILL: kill)
[INFO] running `Command { std: "docker" "inspect" "e55754974f82fb224ae33666ff77a1aa9f11351275e55bbb1fba46c1a469f3d3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e55754974f82fb224ae33666ff77a1aa9f11351275e55bbb1fba46c1a469f3d3", kill_on_drop: false }`
[INFO] [stdout] e55754974f82fb224ae33666ff77a1aa9f11351275e55bbb1fba46c1a469f3d3