[INFO] fetching crate feed 2.1.0...
[INFO] building feed-2.1.0 against beta-2021-01-01 for beta-1.50-1
[INFO] extracting crate feed 2.1.0 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate feed 2.1.0 on toolchain beta-2021-01-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate feed 2.1.0
[INFO] finished tweaking crates.io crate feed 2.1.0
[INFO] tweaked toml for crates.io crate feed 2.1.0 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded rss v0.4.0
[INFO] [stderr]   Downloaded quick-xml v0.4.2
[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" "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" "+beta-2021-01-01" "metadata" "--no-deps" "--format-version=1", 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] 872d294ee40e2e6c7ce2b53701928b34f16ca58b69b50e21889fa8a424ea1721
[INFO] running `Command { std: "docker" "start" "-a" "872d294ee40e2e6c7ce2b53701928b34f16ca58b69b50e21889fa8a424ea1721", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "872d294ee40e2e6c7ce2b53701928b34f16ca58b69b50e21889fa8a424ea1721", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "872d294ee40e2e6c7ce2b53701928b34f16ca58b69b50e21889fa8a424ea1721", kill_on_drop: false }`
[INFO] [stdout] 872d294ee40e2e6c7ce2b53701928b34f16ca58b69b50e21889fa8a424ea1721
[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" "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" "+beta-2021-01-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 730464ea539770750df00995e05e414a14315c000c8afe72bf382d9abf8f5de5
[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" "730464ea539770750df00995e05e414a14315c000c8afe72bf382d9abf8f5de5", kill_on_drop: false }`
[INFO] [stderr]    Compiling libz-sys v1.1.2
[INFO] [stderr]    Compiling curl-sys v0.4.39+curl-7.74.0
[INFO] [stderr]    Compiling quick-xml v0.4.2
[INFO] [stderr]    Compiling chrono v0.3.0
[INFO] [stderr]    Compiling rss v0.4.0
[INFO] [stderr]    Compiling curl v0.4.34
[INFO] [stderr]    Compiling feed v2.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 25.39s
[INFO] running `Command { std: "docker" "inspect" "730464ea539770750df00995e05e414a14315c000c8afe72bf382d9abf8f5de5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "730464ea539770750df00995e05e414a14315c000c8afe72bf382d9abf8f5de5", kill_on_drop: false }`
[INFO] [stdout] 730464ea539770750df00995e05e414a14315c000c8afe72bf382d9abf8f5de5
[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" "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" "+beta-2021-01-01" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 69f398682d31398a4f6494c7d4beb78b71639003bf365fa9a1ffc6a9bd9f05d4
[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" "69f398682d31398a4f6494c7d4beb78b71639003bf365fa9a1ffc6a9bd9f05d4", kill_on_drop: false }`
[INFO] [stderr]    Compiling feed v2.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.49s
[INFO] running `Command { std: "docker" "inspect" "69f398682d31398a4f6494c7d4beb78b71639003bf365fa9a1ffc6a9bd9f05d4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "69f398682d31398a4f6494c7d4beb78b71639003bf365fa9a1ffc6a9bd9f05d4", kill_on_drop: false }`
[INFO] [stdout] 69f398682d31398a4f6494c7d4beb78b71639003bf365fa9a1ffc6a9bd9f05d4