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[SR-184] Wrong diagnostic when uninitialized optional is chained #42806

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jckarter opened this issue Dec 10, 2015 · 2 comments
Closed

[SR-184] Wrong diagnostic when uninitialized optional is chained #42806

jckarter opened this issue Dec 10, 2015 · 2 comments
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@gregomni
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bug A deviation from expected or documented behavior. Also: expected but undesirable behavior.

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@jckarter
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Previous ID SR-184
Radar None
Original Reporter @jckarter
Type Bug
Status Resolved
Resolution Done
Additional Detail from JIRA
Votes 0
Component/s
Labels Bug
Assignee @gregomni
Priority Medium

md5: baeea16bd3d67c1a509c4f3789ecf120

Issue Description:

The following code complains that x is used by a closure before being initialized, instead of more accurately complaining that it's optional-chained (or just generically that it's used):

let x: String?

if [1,2,3].contains(2) {
    x = "lala"
} 
// else {
    // x = nil
// }

print(x)
print(x?.characters.count)
@lilyball
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Mannequin

lilyball mannequin commented Dec 10, 2015

Same surprising error with x!.

@gregomni
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Pull request for fix: <https://github.com/apple/swift/pull/418\>

@swift-ci swift-ci transferred this issue from apple/swift-issues Apr 25, 2022
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@gregomni gregomni

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bug A deviation from expected or documented behavior. Also: expected but undesirable behavior.
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@jckarter @gregomni