[INFO] crate buildkit-frontend 0.3.0 is already in cache
[INFO] testing buildkit-frontend-0.3.0 against 1.45.2 for beta-1.46-1
[INFO] extracting crate buildkit-frontend 0.3.0 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate buildkit-frontend 0.3.0 on toolchain 1.45.2
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.45.2" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate buildkit-frontend 0.3.0
[INFO] finished tweaking crates.io crate buildkit-frontend 0.3.0
[INFO] tweaked toml for crates.io crate buildkit-frontend 0.3.0 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate crates.io crate buildkit-frontend 0.3.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.45.2" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+1.45.2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8586fa0343da81e0788474e5d812facfb8711737d26641abb9a586ee429ad628
[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" "8586fa0343da81e0788474e5d812facfb8711737d26641abb9a586ee429ad628", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8586fa0343da81e0788474e5d812facfb8711737d26641abb9a586ee429ad628", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8586fa0343da81e0788474e5d812facfb8711737d26641abb9a586ee429ad628", kill_on_drop: false }`
[INFO] [stdout] 8586fa0343da81e0788474e5d812facfb8711737d26641abb9a586ee429ad628
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+1.45.2" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1399295cb5f3ceb648a9e12a8d5ce745dc8b68d9e66cca8cf7d27ee99daecb90
[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" "1399295cb5f3ceb648a9e12a8d5ce745dc8b68d9e66cca8cf7d27ee99daecb90", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.16
[INFO] [stderr]    Compiling tower-service v0.3.0
[INFO] [stderr]    Compiling proc-macro-nested v0.1.3
[INFO] [stderr]    Compiling futures-sink v0.3.4
[INFO] [stderr]    Compiling futures-task v0.3.4
[INFO] [stderr]    Compiling anyhow v1.0.26
[INFO] [stderr]    Compiling futures-io v0.3.4
[INFO] [stderr]    Compiling tower-layer v0.3.0
[INFO] [stderr]    Compiling fixedbitset v0.2.0
[INFO] [stderr]    Compiling multimap v0.8.0
[INFO] [stderr]    Compiling tracing-core v0.1.10
[INFO] [stderr]    Compiling itertools v0.8.2
[INFO] [stderr]    Compiling http v0.2.0
[INFO] [stderr]    Compiling which v3.1.0
[INFO] [stderr]    Compiling time v0.1.42
[INFO] [stderr]    Compiling want v0.3.0
[INFO] [stderr]    Compiling mio v0.6.21
[INFO] [stderr]    Compiling futures-channel v0.3.4
[INFO] [stderr]    Compiling block-buffer v0.7.3
[INFO] [stderr]    Compiling rand_pcg v0.2.1
[INFO] [stderr]    Compiling petgraph v0.5.0
[INFO] [stderr]    Compiling sha2 v0.8.1
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling prost-build v0.6.1
[INFO] [stderr]    Compiling tempfile v3.1.0
[INFO] [stderr]    Compiling http-body v0.3.1
[INFO] [stderr]    Compiling synstructure v0.12.3
[INFO] [stderr]    Compiling tokio-macros v0.2.5
[INFO] [stderr]    Compiling pin-project-internal v0.4.8
[INFO] [stderr]    Compiling proc-macro-hack v0.5.11
[INFO] [stderr]    Compiling prost-derive v0.6.1
[INFO] [stderr]    Compiling tracing-attributes v0.1.7
[INFO] [stderr]    Compiling serde_derive v1.0.104
[INFO] [stderr]    Compiling async-stream-impl v0.2.1
[INFO] [stderr]    Compiling async-trait v0.1.24
[INFO] [stderr]    Compiling failure_derive v0.1.6
[INFO] [stderr]    Compiling failure v0.1.6
[INFO] [stderr]    Compiling tokio v0.2.13
[INFO] [stderr]    Compiling async-stream v0.2.1
[INFO] [stderr]    Compiling futures-macro v0.3.4
[INFO] [stderr]    Compiling tracing v0.1.13
[INFO] [stderr]    Compiling pin-project v0.4.8
[INFO] [stderr]    Compiling tower-discover v0.3.0
[INFO] [stderr]    Compiling tower-load-shed v0.3.0
[INFO] [stderr]    Compiling tracing-futures v0.2.3
[INFO] [stderr]    Compiling futures-util v0.3.4
[INFO] [stderr]    Compiling prost v0.6.1
[INFO] [stderr]    Compiling prost-types v0.6.1
[INFO] [stderr]    Compiling tokio-util v0.2.0
[INFO] [stderr]    Compiling tower-load v0.3.0
[INFO] [stderr]    Compiling tower-make v0.3.0
[INFO] [stderr]    Compiling tower-timeout v0.3.0
[INFO] [stderr]    Compiling tower-retry v0.3.0
[INFO] [stderr]    Compiling tower-limit v0.3.0
[INFO] [stderr]    Compiling tower-buffer v0.3.0
[INFO] [stderr]    Compiling serde v1.0.104
[INFO] [stderr]    Compiling tonic-build v0.1.1
[INFO] [stderr]    Compiling tower-util v0.3.0
[INFO] [stderr]    Compiling tower-ready-cache v0.3.1
[INFO] [stderr]    Compiling h2 v0.2.2
[INFO] [stderr]    Compiling futures-executor v0.3.4
[INFO] [stderr]    Compiling futures v0.3.4
[INFO] [stderr]    Compiling tower-balance v0.3.0
[INFO] [stderr]    Compiling tower v0.3.1
[INFO] [stderr]    Compiling buildkit-proto v0.2.0
[INFO] [stderr]    Compiling hyper v0.13.3
[INFO] [stderr]    Compiling serde_json v1.0.48
[INFO] [stderr]    Compiling chrono v0.4.10
[INFO] [stderr]    Compiling tonic v0.1.1
[INFO] [stderr]    Compiling buildkit-llb v0.2.0
[INFO] [stderr]    Compiling buildkit-frontend v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2m 28s
[INFO] running `Command { std: "docker" "inspect" "1399295cb5f3ceb648a9e12a8d5ce745dc8b68d9e66cca8cf7d27ee99daecb90", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1399295cb5f3ceb648a9e12a8d5ce745dc8b68d9e66cca8cf7d27ee99daecb90", kill_on_drop: false }`
[INFO] [stdout] 1399295cb5f3ceb648a9e12a8d5ce745dc8b68d9e66cca8cf7d27ee99daecb90
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+1.45.2" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2eab72b25b9306f834e0aff8112826cbb4c84a71526450be8b59d73fcd1ddbb1
[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" "2eab72b25b9306f834e0aff8112826cbb4c84a71526450be8b59d73fcd1ddbb1", kill_on_drop: false }`
[INFO] [stderr]    Compiling pretty_assertions v0.6.1
[INFO] [stderr]    Compiling env_logger v0.6.2
[INFO] [stderr]    Compiling buildkit-frontend v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr] error: could not compile `buildkit-frontend`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name reverse --edition=2018 examples/reverse.rs --error-format=json --json=diagnostic-rendered-ansi --crate-type bin --emit=dep-info,link -Cembed-bitcode=no -C debuginfo=2 -C metadata=ab093fd8906930cc -C extra-filename=-ab093fd8906930cc --out-dir /opt/rustwide/target/debug/examples -L dependency=/opt/rustwide/target/debug/deps --extern async_trait=/opt/rustwide/target/debug/deps/libasync_trait-e19c3f783bed492e.so --extern buildkit_frontend=/opt/rustwide/target/debug/deps/libbuildkit_frontend-f90bed6b9d72e5ad.rlib --extern buildkit_llb=/opt/rustwide/target/debug/deps/libbuildkit_llb-59f89172d5f6dd5c.rlib --extern buildkit_proto=/opt/rustwide/target/debug/deps/libbuildkit_proto-150ebc8eb517d52a.rlib --extern bytes=/opt/rustwide/target/debug/deps/libbytes-f43c921aa515af8a.rlib --extern chrono=/opt/rustwide/target/debug/deps/libchrono-118660443ba4e705.rlib --extern either=/opt/rustwide/target/debug/deps/libeither-c099265b15df2eb0.rlib --extern env_logger=/opt/rustwide/target/debug/deps/libenv_logger-915d975b2125d404.rlib --extern failure=/opt/rustwide/target/debug/deps/libfailure-571480f386dc0b63.rlib --extern futures=/opt/rustwide/target/debug/deps/libfutures-41aca33f2fc46ba0.rlib --extern libc=/opt/rustwide/target/debug/deps/liblibc-ed3767444d987d24.rlib --extern log=/opt/rustwide/target/debug/deps/liblog-e935e5f43f7a9542.rlib --extern mio=/opt/rustwide/target/debug/deps/libmio-e846f1885e71ceaa.rlib --extern pin_project=/opt/rustwide/target/debug/deps/libpin_project-97b78be793a4791b.rlib --extern pretty_assertions=/opt/rustwide/target/debug/deps/libpretty_assertions-d09f0230a898fc2a.rlib --extern regex=/opt/rustwide/target/debug/deps/libregex-a2bfe8f672b5ff77.rlib --extern serde=/opt/rustwide/target/debug/deps/libserde-ea1a84dc86ba6205.rlib --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-f647ec086494198d.rlib --extern tokio=/opt/rustwide/target/debug/deps/libtokio-e34a5cc95bb79316.rlib --extern tonic=/opt/rustwide/target/debug/deps/libtonic-5142ce3e2d7842fe.rlib --extern tower=/opt/rustwide/target/debug/deps/libtower-eaf3be4806011db6.rlib --extern url=/opt/rustwide/target/debug/deps/liburl-06291972750af5cd.rlib --cap-lints=warn -L native=/opt/rustwide/target/debug/build/backtrace-sys-63df98ce27ab811c/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" "2eab72b25b9306f834e0aff8112826cbb4c84a71526450be8b59d73fcd1ddbb1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2eab72b25b9306f834e0aff8112826cbb4c84a71526450be8b59d73fcd1ddbb1", kill_on_drop: false }`
[INFO] [stdout] 2eab72b25b9306f834e0aff8112826cbb4c84a71526450be8b59d73fcd1ddbb1