[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] checking yangbin/qumulus against try#6f12b8fe67b4eed2e838dab803ed9493b9d62c0f for pr-79073
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyangbin%2Fqumulus" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/yangbin/qumulus on toolchain 6f12b8fe67b4eed2e838dab803ed9493b9d62c0f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6f12b8fe67b4eed2e838dab803ed9493b9d62c0f" "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-8/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" "+6f12b8fe67b4eed2e838dab803ed9493b9d62c0f" "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]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded threadpool v1.7.0
[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-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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+6f12b8fe67b4eed2e838dab803ed9493b9d62c0f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 75162d5036c6eb49d51d16e549a88cfaaa433d41baaca59f91e4f1e1ae5d8a17
[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" "75162d5036c6eb49d51d16e549a88cfaaa433d41baaca59f91e4f1e1ae5d8a17", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "75162d5036c6eb49d51d16e549a88cfaaa433d41baaca59f91e4f1e1ae5d8a17", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "75162d5036c6eb49d51d16e549a88cfaaa433d41baaca59f91e4f1e1ae5d8a17", kill_on_drop: false }`
[INFO] [stdout] 75162d5036c6eb49d51d16e549a88cfaaa433d41baaca59f91e4f1e1ae5d8a17
[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=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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+6f12b8fe67b4eed2e838dab803ed9493b9d62c0f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3f359c01d5ca42c61fce93e802da8a6bd9ac114fa80f3f3a680221a6b640ae7a
[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" "3f359c01d5ca42c61fce93e802da8a6bd9ac114fa80f3f3a680221a6b640ae7a", kill_on_drop: false }`
[INFO] [stderr]     Checking libc v0.2.31
[INFO] [stderr]    Compiling winapi-build v0.1.1
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking cfg-if v0.1.2
[INFO] [stderr]     Checking winapi v0.2.8
[INFO] [stderr]    Compiling gcc v0.3.54
[INFO] [stderr]     Checking lazy_static v0.2.8
[INFO] [stderr]     Checking num-traits v0.1.40
[INFO] [stderr]     Checking serde v1.0.15
[INFO] [stderr]     Checking slab v0.1.3
[INFO] [stderr]     Checking regex-syntax v0.4.1
[INFO] [stderr]     Checking utf8-ranges v1.0.0
[INFO] [stderr]     Checking bytes v0.3.0
[INFO] [stderr]     Checking itoa v0.3.4
[INFO] [stderr]     Checking thread-scoped v1.0.2
[INFO] [stderr]     Checking spin v0.4.6
[INFO] [stderr]     Checking owning_ref v0.2.4
[INFO] [stderr]     Checking slab v0.2.0
[INFO] [stderr]     Checking dtoa v0.4.2
[INFO] [stderr]     Checking byteorder v1.1.0
[INFO] [stderr]    Compiling serde_derive_internals v0.16.0
[INFO] [stderr]     Checking unreachable v1.0.0
[INFO] [stderr]     Checking thread_local v0.3.4
[INFO] [stderr]    Compiling ws2_32-sys v0.2.1
[INFO] [stderr]    Compiling kernel32-sys v0.2.2
[INFO] [stderr]     Checking memchr v1.0.1
[INFO] [stderr]     Checking net2 v0.2.31
[INFO] [stderr]     Checking num_cpus v1.6.2
[INFO] [stderr]     Checking nix v0.5.1
[INFO] [stderr]     Checking time v0.1.38
[INFO] [stderr]     Checking nix v0.6.0
[INFO] [stderr]     Checking rand v0.3.16
[INFO] [stderr]     Checking threadpool v1.7.0
[INFO] [stderr]     Checking aho-corasick v0.6.3
[INFO] [stderr]     Checking miow v0.1.5
[INFO] [stderr]    Compiling context v1.0.1
[INFO] [stderr]    Compiling serde_derive v1.0.15
[INFO] [stderr]     Checking regex v0.2.2
[INFO] [stderr]     Checking env_logger v0.4.3
[INFO] [stderr]     Checking mio v0.5.1
[INFO] [stderr]     Checking serde_json v1.0.3
[INFO] [stderr]     Checking bincode v0.8.0
[INFO] [stderr]     Checking mioco v0.8.1 (https://github.com/dpc/mioco.pre-0.9.git#f6705de1)
[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" "3f359c01d5ca42c61fce93e802da8a6bd9ac114fa80f3f3a680221a6b640ae7a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3f359c01d5ca42c61fce93e802da8a6bd9ac114fa80f3f3a680221a6b640ae7a", kill_on_drop: false }`
[INFO] [stdout] 3f359c01d5ca42c61fce93e802da8a6bd9ac114fa80f3f3a680221a6b640ae7a