[INFO] cloning repository https://github.com/mattgathu/blog
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mattgathu/blog" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmattgathu%2Fblog", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmattgathu%2Fblog'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f756e238c488fed641f6bd21ed4f7992e6ee038f
[INFO] testing mattgathu/blog against 1.49.0 for beta-1.50-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmattgathu%2Fblog" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mattgathu/blog 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 git repo https://github.com/mattgathu/blog
[INFO] finished tweaking git repo https://github.com/mattgathu/blog
[INFO] tweaked toml for git repo https://github.com/mattgathu/blog written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/mattgathu/blog 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-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" "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] 78336be3333ecc86a27e8736706de6aa52fa68177ac5c29805477f5bdaa1273c
[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" "78336be3333ecc86a27e8736706de6aa52fa68177ac5c29805477f5bdaa1273c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "78336be3333ecc86a27e8736706de6aa52fa68177ac5c29805477f5bdaa1273c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "78336be3333ecc86a27e8736706de6aa52fa68177ac5c29805477f5bdaa1273c", kill_on_drop: false }`
[INFO] [stdout] 78336be3333ecc86a27e8736706de6aa52fa68177ac5c29805477f5bdaa1273c
[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" "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] 1ab6b8de7c53c92a998b32ff3ce1636cd84c1927119fcd2fd4ec5a83ab51b206
[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" "1ab6b8de7c53c92a998b32ff3ce1636cd84c1927119fcd2fd4ec5a83ab51b206", 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] [stderr]    Compiling syn v1.0.17
[INFO] [stderr]    Compiling typed-arena v1.7.0
[INFO] [stderr]    Compiling shell-words v1.0.0
[INFO] [stderr]    Compiling unicode_categories v0.1.1
[INFO] [stderr]    Compiling entities v1.0.1
[INFO] [stderr]    Compiling fs_extra v1.1.0
[INFO] [stderr]    Compiling pest_meta v2.1.3
[INFO] [stderr]    Compiling serde_yaml v0.8.11
[INFO] [stderr]    Compiling sass-sys v0.4.18
[INFO] [stderr]    Compiling serde_json v1.0.51
[INFO] [stderr]    Compiling clap v2.33.0
[INFO] [stderr]    Compiling chrono v0.4.11
[INFO] [stderr] error: could not compile `serde_yaml`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name serde_yaml --edition=2018 /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde_yaml-0.8.11/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 -C metadata=429520be5f794c06 -C extra-filename=-429520be5f794c06 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern dtoa=/opt/rustwide/target/debug/deps/libdtoa-cdadc132b5ab6a6f.rmeta --extern linked_hash_map=/opt/rustwide/target/debug/deps/liblinked_hash_map-375907ee5ab78d8f.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-b5677b2e22d661d8.rmeta --extern yaml_rust=/opt/rustwide/target/debug/deps/libyaml_rust-12a3a4d5932d5509.rmeta --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" "1ab6b8de7c53c92a998b32ff3ce1636cd84c1927119fcd2fd4ec5a83ab51b206", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1ab6b8de7c53c92a998b32ff3ce1636cd84c1927119fcd2fd4ec5a83ab51b206", kill_on_drop: false }`
[INFO] [stdout] 1ab6b8de7c53c92a998b32ff3ce1636cd84c1927119fcd2fd4ec5a83ab51b206