crystal 1.16.1

[BrewTestBot]

Created by brew bump

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Created with brew bump-formula-pr.

• resource blocks have been checked for updates.

release notes

### Bugfixes
stdlib

(runtime) Correctly transfer FD ownership in polling event loop (#15650, thanks @ysbaddaden)
(runtime) Fix error message when PollDescriptor can't transfer fd (#15663, thanks @ysbaddaden)
(runtime) Fix libgc pkg-config name for version discovery (#15636, thanks @straight-shoota)
(serialization) [regression] Fix link bcrypt with libxml2 on Windows (#15651, thanks @straight-shoota)

compiler

(cli) [regression] Fix crystal eval read from stdin (#15655, thanks @straight-shoota)

Documentation
stdlib

(runtime) Enable docs for ExecutionContext (#15644, thanks @straight-shoota)
(runtime) Fix mark method overrides on ExecutionContext as :nodoc: (#15659, thanks @ysbaddaden)
(runtime) Update docs for Fiber::ExecutionContext.default_workers_count (#15664, thanks @ysbaddaden)
(runtime) Enhance documentation for ExecutionContext (#15665, thanks @straight-shoota)

Infrastructure

Changelog for 1.16.1 (#15666, thanks @straight-shoota)

[github-actions]

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[branchv]

@Homebrew/core can anyone tell why brew determine-test-runners excluded our arm runners here? It also happened with crystal in #219037, not sure if anyone has seen other instances (note I already dispatched arm bottles to fix this one)

[cho-m]

Probably brew runner detection is not able to handle arch-dependency within system block

homebrew-core/Formula/c/crystal.rb

Lines 49 to 51 in d6e82e2

	on_linux do
	# There is no bootstrap compiler for arm64 Linux
	depends_on arch: :x86_64

Previously we only needed to do this on macOS (e.g. OpenJDK 8). Crystal is one of few formulae that upstream has no official, native build support for aarch64 linux.

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For Crystal specifically, I was also looking at alternative options to build it. Since we cannot cross-compile, 3rd party binaries would be main approach. Not sure yet if possible to extract RPM/Deb from https://packagecloud.io/84codes/crystal to run it without system packages.

EDIT: Looks like upstream added CI (crystal-lang/crystal@d7f38b1) so may be able to get official bootstrap soon.