[INFO] fetching crate rbuf 0.1.1...
[INFO] testing rbuf-0.1.1 against 1.49.0 for beta-1.50-1
[INFO] extracting crate rbuf 0.1.1 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate rbuf 0.1.1 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 rbuf 0.1.1
[INFO] finished tweaking crates.io crate rbuf 0.1.1
[INFO] tweaked toml for crates.io crate rbuf 0.1.1 written to /workspace/builds/worker-8/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-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "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] 40fc237095a6550e498dfc026a7c21ac3696f6f572ada36ba6763a255f73f133
[INFO] running `Command { std: "docker" "start" "-a" "40fc237095a6550e498dfc026a7c21ac3696f6f572ada36ba6763a255f73f133", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "40fc237095a6550e498dfc026a7c21ac3696f6f572ada36ba6763a255f73f133", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "40fc237095a6550e498dfc026a7c21ac3696f6f572ada36ba6763a255f73f133", kill_on_drop: false }`
[INFO] [stdout] 40fc237095a6550e498dfc026a7c21ac3696f6f572ada36ba6763a255f73f133
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "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] 60c9c01b7b9ce957d71615f389131661c6aa05ec5b5d863c789868f0dc76a1da
[INFO] running `Command { std: "docker" "start" "-a" "60c9c01b7b9ce957d71615f389131661c6aa05ec5b5d863c789868f0dc76a1da", kill_on_drop: false }`
[INFO] [stderr]    Compiling rbuf v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.46s
[INFO] running `Command { std: "docker" "inspect" "60c9c01b7b9ce957d71615f389131661c6aa05ec5b5d863c789868f0dc76a1da", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "60c9c01b7b9ce957d71615f389131661c6aa05ec5b5d863c789868f0dc76a1da", kill_on_drop: false }`
[INFO] [stdout] 60c9c01b7b9ce957d71615f389131661c6aa05ec5b5d863c789868f0dc76a1da
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen" "--no-run" "--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] a9f58d8dc5d000361277ed68c4256ac71e61000f0b43ffaaccfdf22762da9bfd
[INFO] running `Command { std: "docker" "start" "-a" "a9f58d8dc5d000361277ed68c4256ac71e61000f0b43ffaaccfdf22762da9bfd", kill_on_drop: false }`
[INFO] [stderr]    Compiling rbuf v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.66s
[INFO] running `Command { std: "docker" "inspect" "a9f58d8dc5d000361277ed68c4256ac71e61000f0b43ffaaccfdf22762da9bfd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a9f58d8dc5d000361277ed68c4256ac71e61000f0b43ffaaccfdf22762da9bfd", kill_on_drop: false }`
[INFO] [stdout] a9f58d8dc5d000361277ed68c4256ac71e61000f0b43ffaaccfdf22762da9bfd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 48613b5f749080309409242166810d56ef5556897f84a0ef73151c199b57a9a1
[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" "48613b5f749080309409242166810d56ef5556897f84a0ef73151c199b57a9a1", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/rbuf-cd2683f2d85cccc6
[INFO] [stdout] 
[INFO] [stdout] running 6 tests
[INFO] [stdout] test tests::iter_size_hint ... ok
[INFO] [stdout] test tests::buf_index ... ok
[INFO] [stdout] test tests::buf_len ... ok
[INFO] [stdout] test tests::double_ended_iter ... ok
[INFO] [stdout] test tests::front_back ... ok
[INFO] [stdout] test tests::iter_next ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 6 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/test-034f167874eec739
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests rbuf
[INFO] [stdout] running 1 test
[INFO] [stdout] test ring_buf_macro ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[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" "48613b5f749080309409242166810d56ef5556897f84a0ef73151c199b57a9a1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "48613b5f749080309409242166810d56ef5556897f84a0ef73151c199b57a9a1", kill_on_drop: false }`
[INFO] [stdout] 48613b5f749080309409242166810d56ef5556897f84a0ef73151c199b57a9a1