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[SR-13258] Conditional binding compiles successfully without optional type #55698

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zienag opened this issue Jul 20, 2020 · 3 comments
Closed

[SR-13258] Conditional binding compiles successfully without optional type #55698

zienag opened this issue Jul 20, 2020 · 3 comments
Labels
accepts invalid Bug: Accepts invalid bug A deviation from expected or documented behavior. Also: expected but undesirable behavior. compiler The Swift compiler in itself type checker Area → compiler: Semantic analysis

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@zienag
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zienag commented Jul 20, 2020

Previous ID SR-13258
Radar None
Original Reporter @zienag
Type Bug
Status Resolved
Resolution Done
Environment

Xcode 12 beta 2, beta 1.
Works as expected in Xcode 11.5

Additional Detail from JIRA
Votes 3
Component/s Compiler
Labels Bug, AcceptsInvalid, TypeChecker
Assignee None
Priority Medium

md5: 5b28d669d0ca987c42d8e004109f10d7

Issue Description:

Code to reproduce:

let a = 1
let b = Int?(nil)
if let c = b ?? a { print(c) }

Extracting nil-coalescing expression to another variable helps.
@theblixguy
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I can reproduce this on Xcode 12 beta 1, but not on master. It looks like this has been fixed.

@theblixguy
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I've added a regression test to make sure we catch this if it happens again: #33000

@CodaFi
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CodaFi commented Jul 21, 2020

I fixed this a while ago in #31760

@swift-ci swift-ci transferred this issue from apple/swift-issues Apr 25, 2022
This issue was closed.
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accepts invalid Bug: Accepts invalid bug A deviation from expected or documented behavior. Also: expected but undesirable behavior. compiler The Swift compiler in itself type checker Area → compiler: Semantic analysis
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@theblixguy @CodaFi @zienag