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[SR-15774] Error "the compiler is unable to type-check this expression in reasonable time" for what should be a fairly trivial expression #58051

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swift-ci opened this issue Jan 26, 2022 · 0 comments
Open

[SR-15774] Error "the compiler is unable to type-check this expression in reasonable time" for what should be a fairly trivial expression #58051

swift-ci opened this issue Jan 26, 2022 · 0 comments
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bug A deviation from expected or documented behavior. Also: expected but undesirable behavior. compiler The Swift compiler in itself

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Previous ID SR-15774
Radar None
Original Reporter aaargh! (JIRA User)
Type Bug
Environment

IDE/Compiler: XCode version 13.2.1 (13C100), Apple Swift version 5.5.2 (swiftlang-1300.0.47.5 clang-1300.0.29.30)

OS: macOS 12.1

Arch: Arm64

Additional Detail from JIRA
Votes 0
Component/s Compiler
Labels Bug
Assignee None
Priority Medium

md5: d350d8f547493a4f867fe9cd4741de79

Issue Description:

The following code causes the compiler to fail with an "the compiler is unable to type-check this expression in reasonable time" error.

fileprivate extension URLSessionTaskTransactionMetrics {
    
    var timeOfLastEvent: Date? {
        responseEndDate ?? responseStartDate ?? requestEndDate ?? requestStartDate ?? connectEndDate ?? secureConnectionEndDate ?? secureConnectionStartDate ?? connectStartDate ?? domainLookupEndDate ?? domainLookupStartDate ?? fetchStartDate
    }
}

All properties here are of type Date?

@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. compiler The Swift compiler in itself
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