swiftlang/swift
Ver no GitHub[SR-12421] Incorrect/unhelpful error when incorrectly calling return in failable initializer
Open
#54.860 aberto em 26 de mar. de 2020
buggood first issue
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Description
| Previous ID | SR-12421 |
| Radar | None |
| Original Reporter | pilky (JIRA User) |
| Type | Bug |
| Status | In Progress |
| Resolution |
Xcode 11.4 (11E146)
| Votes | 0 |
| Component/s | |
| Labels | Bug, StarterBug |
| Assignee | hassaneldesouky (JIRA) |
| Priority | Medium |
md5: 50d6e39b9624d565f57eea856086a4de
Issue Description:
If you create a failable initialiser and accidentally add a simple return rather than return nil when you want to fail, the Compiler gives an error at the start of the init about a property not being initialised.
Ideally this should detect that you have done a simple return rather than a return nil and show an error at that line, ideally with a fixit to add the nil back in
class TestClass {
let label: String
init?(label: String?) { //Gives "Constant 'self.label' used before being initialized"
guard let actualLabel = label else {
return //Actual error is a missing nil here
}
self.label = actualLabel
}
}