Fix Data.count’s setter #2601
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Fix Data.count’s setter #2601
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@swift-ci test |
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D'oh. |
Data provides a settable `count` property. Its expected behavior is undocumented, but based on the implementation, it is intended to zero-extend (or truncate) the collection to the specified length. This does not work correctly if we start with an empty Data and we try to increase the count by a small integer: ``` import Foundation var d = Data() d.count = 2 print(d.count) // ⟹ 0⁉️ d.count = 100 print(d.count) // ⟹ 100 ✓ ``` It looks like this bug was introduced with the Data overhaul that shipped in Swift 5. (This issue was uncovered by swiftlang/swift#28918.) rdar://58134026
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@swift-ci test |
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@swift-ci please test linux platform |
This looks unrelated. |
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@swift-ci test linux |
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@swift-ci test |
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@swift-ci test linux |
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@swift-ci test |
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@swift-ci test macOS platform |
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@lorentey the macOS testing doesn't currently work correctly on this repo so the failure here can be ignored. |
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(This was ported from the overlay fix in swiftlang/swift#28919)
Data provides a settable
countproperty. Its expected behavior is undocumented, but based on the implementation, it is intended to zero-extend (or truncate) the collection to the specified length.This does not work correctly if we start with an empty Data and we try to increase the count by a small integer:
It looks like this bug was introduced with the Data overhaul that shipped in Swift 5.
(This issue was uncovered by swiftlang/swift#28918.)
rdar://58134026