passerine 0.7.2

A small extensible programming language designed for concise expression with little code.
Documentation
Build #304580 2020-10-16T20:52:55.274292+00:00
# rustc version
rustc 1.49.0-nightly (dd7fc54eb 2020-10-15)
# docs.rs version
docsrs 0.6.0 (0bbe2ff 2020-10-14)

# build log
[INFO] running `Command { std: "docker" "create" "-v" "/home/cratesfyi/workspace/builds/passerine-0.7.2/target:/opt/rustwide/target:rw,Z" "-v" "/home/cratesfyi/workspace/builds/passerine-0.7.2/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-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" "--user" "1001:1001" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+nightly" "rustdoc" "--lib" "-j2" "--" "-Z" "unstable-options" "--resource-suffix" "-20201015-1.49.0-nightly-dd7fc54eb" "--static-root-path" "/" "--cap-lints" "warn" "--disable-per-crate-search", kill_on_drop: false }`
[INFO] [stdout] 2a0c8afdcb1937a9f990551738311f83797edd329508a4865dbdac6c2252663c
[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" "2a0c8afdcb1937a9f990551738311f83797edd329508a4865dbdac6c2252663c", kill_on_drop: false }`
[INFO] [stderr] /opt/crates-build-env/entrypoint.sh: line 7: /etc/hosts: Permission denied
[INFO] [stderr]  Documenting passerine v0.7.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.32s
[INFO] running `Command { std: "docker" "inspect" "2a0c8afdcb1937a9f990551738311f83797edd329508a4865dbdac6c2252663c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2a0c8afdcb1937a9f990551738311f83797edd329508a4865dbdac6c2252663c", kill_on_drop: false }`
[INFO] [stdout] 2a0c8afdcb1937a9f990551738311f83797edd329508a4865dbdac6c2252663c