[swift-dev] [Swift CI] Build Failure: 2. Swift Source Compatibility Suite (master) #220

Ben Langmuir blangmuir at apple.com
Tue Sep 12 15:36:27 CDT 2017

Any ideas?
It looks like we can’t find UICollectionViewLayout.prepare(), but the same file compiled okay in the “Chatto” project (this one is “ChattoApp”). The SDK versions appear to be the same as the previous build, and Doug’s commit looks unrelated to me.  The project is using the same hash as the previous build too.
ChatCollectionViewLayout.swift:86:24: error: method does not override any method from its superclass
    open override func prepare() {
         ~~~~~~~~      ^
ChatCollectionViewLayout.swift:87:15: error: cannot invoke 'prepare' with no arguments
ChatCollectionViewLayout.swift:87:15: note: overloads for 'prepare' exist with these partially matching parameter lists: (forCollectionViewUpdates: [UICollectionViewUpdateItem]), (forAnimatedBoundsChange: CGRect)
rdar://problem/34395450 <rdar://problem/34395450>

> On Sep 12, 2017, at 12:40 PM, no-reply at swift.org wrote:
> [FAILURE] swift-master-source-compat-suite [#220]
> Build URL:	https://ci.swift.org/job/swift-master-source-compat-suite/220/ <https://ci.swift.org/job/swift-master-source-compat-suite/220/>
> Project:	swift-master-source-compat-suite
> Date of build:	Tue, 12 Sep 2017 12:00:32 -0500
> Build duration:	2 hr 41 min
> Changes
> Commit 7dc8737c9c46e5d0c54fe36415e2fd8ed12b5dac by dgregor:
> [Sequence] Make Sequence.SubSequence conform to Sequence.
> edit: stdlib/private/StdlibCollectionUnittest/CheckSequenceType.swift
> edit: stdlib/public/core/ExistentialCollection.swift.gyb
> edit: stdlib/public/core/SequenceWrapper.swift
> edit: stdlib/public/core/Collection.swift
> edit: stdlib/private/StdlibUnittest/StdlibUnittest.swift.gyb
> edit: stdlib/public/core/Sequence.swift

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