[INFO] cloning repository https://github.com/michalseweryn/didactic-guide
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/michalseweryn/didactic-guide" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmichalseweryn%2Fdidactic-guide", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmichalseweryn%2Fdidactic-guide'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] bb052bd871c41f6bd7de2e0312576fe84193daf9
[INFO] testing michalseweryn/didactic-guide against beta-2021-08-01 for beta-1.55-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmichalseweryn%2Fdidactic-guide" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/michalseweryn/didactic-guide on toolchain beta-2021-08-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/michalseweryn/didactic-guide
[INFO] finished tweaking git repo https://github.com/michalseweryn/didactic-guide
[INFO] tweaked toml for git repo https://github.com/michalseweryn/didactic-guide written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/michalseweryn/didactic-guide already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded wasmtime-fiber v0.27.0
[INFO] [stderr]   Downloaded cranelift-codegen-shared v0.74.0
[INFO] [stderr]   Downloaded cranelift-bforest v0.74.0
[INFO] [stderr]   Downloaded cranelift-native v0.74.0
[INFO] [stderr]   Downloaded wasmtime-cache v0.27.0
[INFO] [stderr]   Downloaded wasmtime-runtime v0.27.0
[INFO] [stderr]   Downloaded cranelift-frontend v0.74.0
[INFO] [stderr]   Downloaded wast v36.0.0
[INFO] [stderr]   Downloaded cranelift-codegen-meta v0.74.0
[INFO] [stderr]   Downloaded cpp_demangle v0.3.2
[INFO] [stderr]   Downloaded wasmtime-cranelift v0.27.0
[INFO] [stderr]   Downloaded wasmtime-jit v0.27.0
[INFO] [stderr]   Downloaded wasmtime-profiling v0.27.0
[INFO] [stderr]   Downloaded target-lexicon v0.12.0
[INFO] [stderr]   Downloaded parity-scale-codec v2.1.3
[INFO] [stderr]   Downloaded cranelift-wasm v0.74.0
[INFO] [stderr]   Downloaded wasmparser v0.78.2
[INFO] [stderr]   Downloaded wasmtime-environ v0.27.0
[INFO] [stderr]   Downloaded wat v1.0.38
[INFO] [stderr]   Downloaded wasmtime v0.27.0
[INFO] [stderr]   Downloaded wasmtime-debug v0.27.0
[INFO] [stderr]   Downloaded wasmtime-obj v0.27.0
[INFO] [stderr]   Downloaded parity-scale-codec-derive v2.1.3
[INFO] [stderr]   Downloaded cranelift-entity v0.74.0
[INFO] [stderr]   Downloaded cranelift-codegen v0.74.0
[INFO] [stderr]   Downloaded librocksdb-sys v6.17.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 34520919caa25ed03f28f7b5d4d1fb0cfcb9162981814b5e06530d89e2b52f1a
[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" "34520919caa25ed03f28f7b5d4d1fb0cfcb9162981814b5e06530d89e2b52f1a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "34520919caa25ed03f28f7b5d4d1fb0cfcb9162981814b5e06530d89e2b52f1a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "34520919caa25ed03f28f7b5d4d1fb0cfcb9162981814b5e06530d89e2b52f1a", kill_on_drop: false }`
[INFO] [stdout] 34520919caa25ed03f28f7b5d4d1fb0cfcb9162981814b5e06530d89e2b52f1a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 0beea2806023ee5955e2a50c6f47eb1438fce966a6dbab973d89d13cb9ed9981
[INFO] running `Command { std: "docker" "start" "-a" "0beea2806023ee5955e2a50c6f47eb1438fce966a6dbab973d89d13cb9ed9981", kill_on_drop: false }`
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]    Compiling region v2.2.0
[INFO] [stderr]    Compiling clang-sys v1.2.0
[INFO] [stderr]    Compiling clap v2.33.3
[INFO] [stderr]    Compiling serde_derive v1.0.126
[INFO] [stderr]    Compiling ctor v0.1.20
[INFO] [stderr]    Compiling thiserror-impl v1.0.25
[INFO] [stderr]    Compiling synstructure v0.12.4
[INFO] [stderr]    Compiling futures-macro v0.3.15
[INFO] [stderr]    Compiling tracing-attributes v0.1.15
[INFO] [stderr]    Compiling impl-trait-for-tuples v0.2.1
[INFO] [stderr]    Compiling sp-debug-derive v3.0.0 (https://github.com/paritytech/substrate.git?tag=monthly-2021-07#83808aa8)
[INFO] [stderr]    Compiling ref-cast-impl v1.0.6
[INFO] [stderr]    Compiling dyn-clonable-impl v0.9.0
[INFO] [stderr]    Compiling async-trait v0.1.50
[INFO] [stderr]    Compiling prost-derive v0.7.0
[INFO] [stderr]    Compiling derive_more v0.99.14
[INFO] [stderr]    Compiling pin-project-internal v1.0.7
[INFO] [stderr] error: could not compile `async-trait`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name async_trait --edition=2018 /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/async-trait-0.1.50/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi --crate-type proc-macro --emit=dep-info,link -C prefer-dynamic -C embed-bitcode=no -C debuginfo=2 -C metadata=38dccd6cc1d52d01 -C extra-filename=-38dccd6cc1d52d01 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-c93edf686a01401b.rlib --extern quote=/opt/rustwide/target/debug/deps/libquote-7582d5e7a88c37e8.rlib --extern syn=/opt/rustwide/target/debug/deps/libsyn-0eeb2ffcac1536de.rlib --extern proc_macro --cap-lints allow --cap-lints=warn` (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" "0beea2806023ee5955e2a50c6f47eb1438fce966a6dbab973d89d13cb9ed9981", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0beea2806023ee5955e2a50c6f47eb1438fce966a6dbab973d89d13cb9ed9981", kill_on_drop: false }`
[INFO] [stdout] 0beea2806023ee5955e2a50c6f47eb1438fce966a6dbab973d89d13cb9ed9981
