[INFO] crate tokio-trace 0.1.0 is already in cache
[INFO] checking tokio-trace-0.1.0 against nightly-2019-10-27 for pr-65897
[INFO] extracting crate tokio-trace 0.1.0 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate tokio-trace 0.1.0 on toolchain nightly-2019-10-27
[INFO] running `"/workspace/cargo-home/bin/cargo" "+nightly-2019-10-27" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate tokio-trace 0.1.0
[INFO] finished tweaking crates.io crate tokio-trace 0.1.0
[INFO] tweaked toml for crates.io crate tokio-trace 0.1.0 written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+nightly-2019-10-27" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+nightly-2019-10-27" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=allow" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+nightly-2019-10-27" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 493c45059c61c07d63a14040565d32ba28b21ce89d57c4eee3d5d095d608d554
[INFO] running `"docker" "start" "-a" "493c45059c61c07d63a14040565d32ba28b21ce89d57c4eee3d5d095d608d554"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking tokio-trace-core v0.2.0
[INFO] [stderr]     Checking tokio-trace v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0658]: type ascription is experimental
[INFO] [stderr]   --> tests/macros.rs:89:47
[INFO] [stderr]    |
[INFO] [stderr] 89 |     span!(Level::DEBUG, target: "foo_events", parent: None, "foo");
[INFO] [stderr]    |                                               ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/23416
[INFO] [stderr]    = help: add `#![feature(type_ascription)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: type ascription is experimental
[INFO] [stderr]    --> tests/macros.rs:162:47
[INFO] [stderr]     |
[INFO] [stderr] 162 |     span!(Level::DEBUG, target: "foo_events", parent: &p, "foo");
[INFO] [stderr]     |                                               ^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/23416
[INFO] [stderr]     = help: add `#![feature(type_ascription)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0658`.
[INFO] [stderr] error: could not compile `tokio-trace`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "493c45059c61c07d63a14040565d32ba28b21ce89d57c4eee3d5d095d608d554"`
[INFO] running `"docker" "rm" "-f" "493c45059c61c07d63a14040565d32ba28b21ce89d57c4eee3d5d095d608d554"`
[INFO] [stdout] 493c45059c61c07d63a14040565d32ba28b21ce89d57c4eee3d5d095d608d554