downcast-rs 1.2.0

Trait object downcasting support using only safe Rust. It supports type parameters, associated types, and type constraints.
Documentation
Build #266088 2020-06-30T00:08:37.135260+00:00
# rustc version
rustc 1.46.0-nightly (2f517ce6f 2020-06-28)
# docs.rs version
docsrs 0.6.0 (c547669 2020-06-29)

# build log
[INFO] running `Command { std: "docker" "create" "-v" "/home/cratesfyi/workspace/builds/downcast-rs-1.2.0/target:/opt/rustwide/target:rw,Z" "-v" "/home/cratesfyi/workspace/builds/downcast-rs-1.2.0/source:/opt/rustwide/workdir:ro,Z" "-v" "/home/cratesfyi/workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/home/cratesfyi/workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1001" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "RUSTFLAGS=" "-e" "RUSTDOCFLAGS=-Z unstable-options --resource-suffix -20200628-1.46.0-nightly-2f517ce6f --static-root-path / --cap-lints warn" "-e" "DOCS_RS=1" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "3221225472" "--cpus" "2" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+nightly" "doc" "--lib" "--no-deps" "-j2", 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] cb169d2a544f74bb2a25b160b84d04070f435569294ab91bd91c6b160b54fee9
[INFO] running `Command { std: "docker" "start" "-a" "cb169d2a544f74bb2a25b160b84d04070f435569294ab91bd91c6b160b54fee9", kill_on_drop: false }`
[INFO] [stderr]  Documenting downcast-rs v1.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.27s
[INFO] running `Command { std: "docker" "inspect" "cb169d2a544f74bb2a25b160b84d04070f435569294ab91bd91c6b160b54fee9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cb169d2a544f74bb2a25b160b84d04070f435569294ab91bd91c6b160b54fee9", kill_on_drop: false }`
[INFO] [stdout] cb169d2a544f74bb2a25b160b84d04070f435569294ab91bd91c6b160b54fee9