[INFO] fetching crate appendbuf 0.1.6...
[INFO] testing appendbuf-0.1.6 against 1.49.0 for beta-1.50-1
[INFO] extracting crate appendbuf 0.1.6 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate appendbuf 0.1.6 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 crates.io crate appendbuf 0.1.6
[INFO] finished tweaking crates.io crate appendbuf 0.1.6
[INFO] tweaked toml for crates.io crate appendbuf 0.1.6 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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" "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] fbe13a3955db00ee74b167236d805c1258b550351adbeed0c9661555a31df410
[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" "fbe13a3955db00ee74b167236d805c1258b550351adbeed0c9661555a31df410", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fbe13a3955db00ee74b167236d805c1258b550351adbeed0c9661555a31df410", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fbe13a3955db00ee74b167236d805c1258b550351adbeed0c9661555a31df410", kill_on_drop: false }`
[INFO] [stdout] fbe13a3955db00ee74b167236d805c1258b550351adbeed0c9661555a31df410
[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" "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] 6f0882dcaccb973858cc3d1fbb5bc95ab2d613e42c680ef7beede930b0bd4285
[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" "6f0882dcaccb973858cc3d1fbb5bc95ab2d613e42c680ef7beede930b0bd4285", kill_on_drop: false }`
[INFO] [stderr]    Compiling memalloc v0.1.0
[INFO] [stderr]    Compiling appendbuf v0.1.6 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.21s
[INFO] running `Command { std: "docker" "inspect" "6f0882dcaccb973858cc3d1fbb5bc95ab2d613e42c680ef7beede930b0bd4285", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6f0882dcaccb973858cc3d1fbb5bc95ab2d613e42c680ef7beede930b0bd4285", kill_on_drop: false }`
[INFO] [stdout] 6f0882dcaccb973858cc3d1fbb5bc95ab2d613e42c680ef7beede930b0bd4285
[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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7e3f1c812129eca75b11a33082df42039419a2cf10aeb7370b7e8da5abc4b932
[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" "7e3f1c812129eca75b11a33082df42039419a2cf10aeb7370b7e8da5abc4b932", kill_on_drop: false }`
[INFO] [stderr]    Compiling appendbuf v0.1.6 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.13s
[INFO] running `Command { std: "docker" "inspect" "7e3f1c812129eca75b11a33082df42039419a2cf10aeb7370b7e8da5abc4b932", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7e3f1c812129eca75b11a33082df42039419a2cf10aeb7370b7e8da5abc4b932", kill_on_drop: false }`
[INFO] [stdout] 7e3f1c812129eca75b11a33082df42039419a2cf10aeb7370b7e8da5abc4b932
[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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 073a1ca6ad9486b2285dc3ee81c2a6a17bb71c2b36fe3c66361352e89ae8cef7
[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" "073a1ca6ad9486b2285dc3ee81c2a6a17bb71c2b36fe3c66361352e89ae8cef7", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stdout] running 9 tests
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/appendbuf-9c860f4f87c99c60
[INFO] [stdout] test test_convert_from_vec ... ok
[INFO] [stdout] test test_slice_slicing ... ok
[INFO] [stdout] test test_slice_then_write ... ok
[INFO] [stdout] test test_overlong_write ... ok
[INFO] [stdout] test test_slice_bounds_edge_cases ... ok
[INFO] [stdout] test test_many_writes ... ok
[INFO] [stdout] test test_write_and_slice ... ok
[INFO] [stdout] test test_slice_to_bounds_checks ... ok
[INFO] [stdout] test test_slice_from_bounds_checks ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 9 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests appendbuf
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "073a1ca6ad9486b2285dc3ee81c2a6a17bb71c2b36fe3c66361352e89ae8cef7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "073a1ca6ad9486b2285dc3ee81c2a6a17bb71c2b36fe3c66361352e89ae8cef7", kill_on_drop: false }`
[INFO] [stdout] 073a1ca6ad9486b2285dc3ee81c2a6a17bb71c2b36fe3c66361352e89ae8cef7