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[SR-15854] Compiler thinks function closure parameter default value "throws" when it's not #58128

mattyoung opened this issue Feb 12, 2022 · 0 comments


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mattyoung commented Feb 12, 2022

Previous ID SR-15854
Radar None
Original Reporter @mattyoung
Type Bug
Status Resolved
Resolution Duplicate

Xcode Version 13.3 beta 2 (13E5095k)

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

md5: 4c20bc25d194caaf0caaa25c7402115b


  • SR-1534 Error: Call is to rethrows function, but a defaulted argument function can throw

Issue Description:

func f<Target: Comparable>(_ a: Target, _ b: Target, areInIncreasingOrder: (Target, Target) throws -> Bool = (<)) rethrows -> Bool {
    try areInIncreasingOrder(a, b)

#warning("Compiler bug: compiler think this is throws but it's not")
f(1, 2)    // !! Call can throw but is not marked with 'try'


@swift-ci swift-ci transferred this issue from apple/swift-issues Apr 25, 2022
This issue was closed.
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