To add a little more information: it happens when encountering any directory
that the user can’t read.
My app should get an access denied error (the enumerator should be nil for
instance). It shouldn’t crash.
> On 22 Oct 2016, at 20:37, Jean Suisse <jean.li...@gmail.com> wrote:
>
> Well, I was afraid of that.
> Unfortunately, below is the smallest sample of code possible… still crashes.
> Looks like I may have to check the directory rights before even attempting to
> enumerate it.
> Expected result in the present case is: “the while loop doesn’t run because
> the directory isn’t accessible to the current user”.
>
>
> let directoryURL = URL(fileURLWithPath: "/.DocumentRevisions-V100/")
> let manager = FileManager.default
>
> let keys = [URLResourceKey.nameKey, URLResourceKey.isDirectoryKey]
>
> let enumerator = manager.enumerator(at: directoryURL,
> includingPropertiesForKeys: keys, options: [.skipsSubdirectoryDescendants])
> {
> url, error -> Bool in
> return true
> }
>
> // this will
> while let file = enumerator?.nextObject() as? URL
> {
> // ...
> }
>
>
>
>> On 22 Oct 2016, at 20:32, Jens Alfke <j...@mooseyard.com
>> <mailto:j...@mooseyard.com>> wrote:
>>
>> Smells like an OS bug, or a bug in the ObjC-to-Swift bindings. Try to build
>> a minimal test to reproduce it, i.e. narrow down which of the
>> URLResourceKeys triggers the crash, and which specific file being returned
>> by the enumerator. Then see what if anything is unusual about that file.
>> Then probably file a bug report with Apple…
>>
>> As for working around it, perhaps the resource key causing the crash is one
>> you don’t need and can omit? (It’s hard to imagine needing all of those
>> attributes…)
>>
>> —Jens
>
-----------
Jean Suisse
Institut de Chimie Moléculaire de l’Université de Bourgogne
(ICMUB) — UMR 6302
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