[Xcode 9 beta 5] Fixed an issue causing infinite recursion in the Swift runtime.

[andersio]

Checklist

• Updated CHANGELOG.md.

[mdiep]

Why does this cause infinite recursion? 😕

[andersio]

The stack is overflown by an infinite recursion of Swift._bridgeAnyObjectToAny. We shouldn't have used Any here anyway.

[andersio]

Presumably since beta 5 the bridging call relies on -class and +class, which in turns require bridging due to the use of Any.

[liscio]

This one bit me pretty badly recently during development. Any idea what is causing the CI build to fail? I know nothing about CocoaPods, myself…

[ikesyo]

@liscio @andersio

$ pod lib lint ReactiveCocoa.podspec
 -> ReactiveCocoa (6.0.0)
    - WARN  | swift_version: The validator for Swift projects uses Swift 3.0 by default, if you are using a different version of swift you can use a `.swift-version` file to set the version for your Pod. For example to use Swift 2.3, run: 
    `echo "2.3" > .swift-version`
[!] ReactiveCocoa did not pass validation, due to 1 warning (but you can use `--allow-warnings` to ignore it).
You can use the `--no-clean` option to inspect any issue.
The command "pod lib lint ReactiveCocoa.podspec" exited with 1.

We should pass --swift-version=3.0 to pod lib lint ReactiveCocoa.podspec to silence the warning (or --allow-warnings).