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[SR-8244] String equal return different result if I changed the position of parameters #50776

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swift-ci opened this issue Jul 13, 2018 · 5 comments
Closed

[SR-8244] String equal return different result if I changed the position of parameters #50776

swift-ci opened this issue Jul 13, 2018 · 5 comments
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bug A deviation from expected or documented behavior. Also: expected but undesirable behavior. standard library Area: Standard library umbrella

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@swift-ci
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Previous ID SR-8244
Radar None
Original Reporter kmk (JIRA User)
Type Bug
Status Resolved
Resolution Done

Attachment: Download

Environment

Swift 4.1

XCode Version 9.4.1 (9F2000)

Additional Detail from JIRA
Votes 0
Component/s Standard Library
Labels Bug
Assignee kmk (JIRA)
Priority Medium

md5: 0c11ed739805f8bc3fcca4d1a45d4a64

Issue Description:

// String equal return different result if I changed the position of parameters

// I don't know if this is a bug ?

////////////////////////////////////////////////////////////

let u0 = "lǚ"

let u1 = "luǒ"

print(u0 == u1) // false

print(u1 == u0) // true
@belkadan
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@milseman I think this was one of the things we and/or CoreFoundation fixed in Swift 4.2, right? At least, I don't see the bad behavior in the Xcode 10 beta.

@swift-ci
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Comment by kmk (JIRA)

Thank you.

@milseman
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milseman mannequin commented Jul 13, 2018

I don't know about CoreFoundation. For Swift 4.2, we switched off of CoreFoundation and onto our own custom comparison, which directly implements canonical equivalence. This issue does not reproduce for me with Swift 4.2

@milseman
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Mannequin

milseman mannequin commented Jul 13, 2018

Fixed in Swift 4.2

@milseman
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milseman mannequin commented Jul 13, 2018

kmk (JIRA User), can you verify your problem is fixed with a recent Xcode-10 beta and/or a recent 4.2 toolchain on swift.org?

@swift-ci swift-ci transferred this issue from apple/swift-issues Apr 25, 2022
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bug A deviation from expected or documented behavior. Also: expected but undesirable behavior. standard library Area: Standard library umbrella
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@belkadan @swift-ci