[INFO] cloning repository https://github.com/yangbin/qumulus
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/yangbin/qumulus" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyangbin%2Fqumulus", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyangbin%2Fqumulus'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3f004d57f50cd8d339b460093982efbd86e1e97b
[INFO] testing yangbin/qumulus against try#eafdee2dfae8c2233b74f98b123308be7ccefcc6 for pr-79296
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyangbin%2Fqumulus" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/yangbin/qumulus on toolchain eafdee2dfae8c2233b74f98b123308be7ccefcc6
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+eafdee2dfae8c2233b74f98b123308be7ccefcc6" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/yangbin/qumulus
[INFO] finished tweaking git repo https://github.com/yangbin/qumulus
[INFO] tweaked toml for git repo https://github.com/yangbin/qumulus written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/yangbin/qumulus already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+eafdee2dfae8c2233b74f98b123308be7ccefcc6" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating git repository `https://github.com/dpc/mioco.pre-0.9.git`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded spin v0.4.6
[INFO] [stderr]   Downloaded threadpool v1.7.0
[INFO] [stderr]   Downloaded owning_ref v0.2.4
[INFO] [stderr]   Downloaded slab v0.2.0
[INFO] [stderr]   Downloaded context v1.0.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "+eafdee2dfae8c2233b74f98b123308be7ccefcc6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a0f4aed87935be44cb86d80b0ae09d8a7aabe3af04625337f0345466ab2d20ba
[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" "a0f4aed87935be44cb86d80b0ae09d8a7aabe3af04625337f0345466ab2d20ba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a0f4aed87935be44cb86d80b0ae09d8a7aabe3af04625337f0345466ab2d20ba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a0f4aed87935be44cb86d80b0ae09d8a7aabe3af04625337f0345466ab2d20ba", kill_on_drop: false }`
[INFO] [stdout] a0f4aed87935be44cb86d80b0ae09d8a7aabe3af04625337f0345466ab2d20ba
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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=forbid" "-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" "+eafdee2dfae8c2233b74f98b123308be7ccefcc6" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b0306ad2d668160a56395ffab70b5bf290a5e83230c17ff95f3d0b06cf95b9a7
[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" "b0306ad2d668160a56395ffab70b5bf290a5e83230c17ff95f3d0b06cf95b9a7", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.31
[INFO] [stderr]    Compiling winapi-build v0.1.1
[INFO] [stderr]    Compiling semver v0.1.20
[INFO] [stderr]    Compiling winapi v0.2.8
[INFO] [stderr]    Compiling gcc v0.3.54
[INFO] [stderr]    Compiling log v0.3.8
[INFO] [stderr]    Compiling regex-syntax v0.4.1
[INFO] [stderr]    Compiling num-traits v0.1.40
[INFO] [stderr]    Compiling slab v0.1.3
[INFO] [stderr]    Compiling bytes v0.3.0
[INFO] [stderr]    Compiling serde v1.0.15
[INFO] [stderr]    Compiling utf8-ranges v1.0.0
[INFO] [stderr]    Compiling slab v0.2.0
[INFO] [stderr]    Compiling thread-scoped v1.0.2
[INFO] [stderr]    Compiling spin v0.4.6
[INFO] [stderr]    Compiling owning_ref v0.2.4
[INFO] [stderr]    Compiling unreachable v1.0.0
[INFO] [stderr]    Compiling serde_derive_internals v0.16.0
[INFO] [stderr]    Compiling thread_local v0.3.4
[INFO] [stderr]    Compiling ws2_32-sys v0.2.1
[INFO] [stderr]    Compiling kernel32-sys v0.2.2
[INFO] [stderr]    Compiling rustc_version v0.1.7
[INFO] [stderr]    Compiling net2 v0.2.31
[INFO] [stderr]    Compiling memchr v1.0.1
[INFO] [stderr]    Compiling time v0.1.38
[INFO] [stderr]    Compiling num_cpus v1.6.2
[INFO] [stderr]    Compiling nix v0.5.1
[INFO] [stderr]    Compiling rand v0.3.16
[INFO] [stderr]    Compiling aho-corasick v0.6.3
[INFO] [stderr]    Compiling nix v0.6.0
[INFO] [stderr]    Compiling miow v0.1.5
[INFO] [stderr]    Compiling threadpool v1.7.0
[INFO] [stderr]    Compiling context v1.0.1
[INFO] [stderr]    Compiling serde_derive v1.0.15
[INFO] [stderr]    Compiling regex v0.2.2
[INFO] [stderr]    Compiling mio v0.5.1
[INFO] [stderr]    Compiling env_logger v0.4.3
[INFO] [stderr]    Compiling mioco v0.8.1 (https://github.com/dpc/mioco.pre-0.9.git#f6705de1)
[INFO] [stderr]    Compiling bincode v0.8.0
[INFO] [stderr]    Compiling serde_json v1.0.3
[INFO] [stdout] error[E0446]: private type `ReceiverCore<T>` in public interface
[INFO] [stdout]   --> /opt/rustwide/cargo-home/git/checkouts/mioco.pre-0.9-c53d3468b1c5ae28/f6705de/src/sync/mpsc.rs:35:5
[INFO] [stdout]    |
[INFO] [stdout] 26 | struct ReceiverCore<T> {
[INFO] [stdout]    | ---------------------- `ReceiverCore<T>` declared as private
[INFO] [stdout] ...
[INFO] [stdout] 35 |     type Raw = ReceiverCore<T>;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^ can't leak private type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0446]: private type `TimerCore` in public interface
[INFO] [stdout]   --> /opt/rustwide/cargo-home/git/checkouts/mioco.pre-0.9-c53d3468b1c5ae28/f6705de/src/timer.rs:47:5
[INFO] [stdout]    |
[INFO] [stdout] 18 | struct TimerCore {
[INFO] [stdout]    | ---------------- `TimerCore` declared as private
[INFO] [stdout] ...
[INFO] [stdout] 47 |     type Raw = TimerCore;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^ can't leak private type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0446`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `mioco`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "b0306ad2d668160a56395ffab70b5bf290a5e83230c17ff95f3d0b06cf95b9a7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b0306ad2d668160a56395ffab70b5bf290a5e83230c17ff95f3d0b06cf95b9a7", kill_on_drop: false }`
[INFO] [stdout] b0306ad2d668160a56395ffab70b5bf290a5e83230c17ff95f3d0b06cf95b9a7