[INFO] fetching crate mdbook-dtmo 0.8.2...
[INFO] checking mdbook-dtmo-0.8.2 against try#82acd1d76add2232e19c1f0feb250d2a19ec6efe for pr-81213
[INFO] extracting crate mdbook-dtmo 0.8.2 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate mdbook-dtmo 0.8.2 on toolchain 82acd1d76add2232e19c1f0feb250d2a19ec6efe
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+82acd1d76add2232e19c1f0feb250d2a19ec6efe" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mdbook-dtmo 0.8.2
[INFO] finished tweaking crates.io crate mdbook-dtmo 0.8.2
[INFO] tweaked toml for crates.io crate mdbook-dtmo 0.8.2 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate crates.io crate mdbook-dtmo 0.8.2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+82acd1d76add2232e19c1f0feb250d2a19ec6efe" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded mdbook-toc v0.6.0
[INFO] [stderr]   Downloaded mdbook-open-on-gh v1.4.0
[INFO] [stderr]   Downloaded mdbook-mermaid v0.7.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+82acd1d76add2232e19c1f0feb250d2a19ec6efe" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0fe12512c6d11071d74775a5a572cec93d01e6e1dcd30d476ab275f1954008e8
[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" "0fe12512c6d11071d74775a5a572cec93d01e6e1dcd30d476ab275f1954008e8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0fe12512c6d11071d74775a5a572cec93d01e6e1dcd30d476ab275f1954008e8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0fe12512c6d11071d74775a5a572cec93d01e6e1dcd30d476ab275f1954008e8", kill_on_drop: false }`
[INFO] [stdout] 0fe12512c6d11071d74775a5a572cec93d01e6e1dcd30d476ab275f1954008e8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+82acd1d76add2232e19c1f0feb250d2a19ec6efe" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 86e1f4ce668ea785ebc8b0baf8814870e062954d0fa7935e06c2f30057f6841f
[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" "86e1f4ce668ea785ebc8b0baf8814870e062954d0fa7935e06c2f30057f6841f", kill_on_drop: false }`
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]     Checking ascii v0.9.3
[INFO] [stderr]     Checking bit-vec v0.6.2
[INFO] [stderr]     Checking difference v2.0.0
[INFO] [stderr]     Checking unreachable v1.0.0
[INFO] [stderr]     Checking pin-project v0.4.24
[INFO] [stderr]     Checking tokio v0.2.22
[INFO] [stderr]     Checking pulldown-cmark-to-cmark v4.0.2
[INFO] [stderr]    Compiling html5ever v0.25.1
[INFO] [stderr]     Checking elasticlunr-rs v2.3.9
[INFO] [stderr]    Compiling markup5ever v0.10.0
[INFO] [stderr]     Checking futures-util v0.3.5
[INFO] [stderr]     Checking tracing-futures v0.2.4
[INFO] [stderr]     Checking pretty_assertions v0.6.1
[INFO] [stderr]     Checking bit-set v0.5.2
[INFO] [stderr]     Checking combine v3.8.1
[INFO] [stdout] error[E0277]: the trait bound `read_dir::DirEntry: std::sealed::Sealed` is not satisfied
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/tokio-0.2.22/src/fs/read_dir.rs:240:6
[INFO] [stdout]     |
[INFO] [stdout] 240 | impl DirEntryExt for DirEntry {
[INFO] [stdout]     |      ^^^^^^^^^^^ the trait `std::sealed::Sealed` is not implemented for `read_dir::DirEntry`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `tokio`
[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" "86e1f4ce668ea785ebc8b0baf8814870e062954d0fa7935e06c2f30057f6841f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "86e1f4ce668ea785ebc8b0baf8814870e062954d0fa7935e06c2f30057f6841f", kill_on_drop: false }`
[INFO] [stdout] 86e1f4ce668ea785ebc8b0baf8814870e062954d0fa7935e06c2f30057f6841f