[SR-5852] Compilation failure for overloaded enum initializers with whole module optimization turned on #48422
Labels
compiler
The Swift compiler in itself
Comments
|
Reproduced. Very strange! Thanks, Allen. @swift-ci create |
|
Reduced: // ProxyStruct.swift
enum SecondEnum: String {
case one
init(rawValue: RawValue?) {
fatalError()
}
}
func g(secondEnumString: String?) {
SecondEnum(rawValue: secondEnumString)
}
// main.swift
func f(proxy: SecondEnum?) {
_ = proxy?.rawValue
}Manually writing out a RawRepresentable conformance has funny behavior, e.g. this works (as does adding enum SecondEnum: RawRepresentable {
case one
typealias RawValue = String
var rawValue: RawValue { return "" }
init?(rawValue: RawValue) {
fatalError()
}
init(rawValue: RawValue?) {
fatalError()
}
}But these two (relying on associated type inference) don't: enum SecondEnum: RawRepresentable {
case one
var rawValue: String { return "" }
init?(rawValue: RawValue) {
fatalError()
}
init(rawValue: RawValue?) {
fatalError()
}
}
// error: cannot invoke initializer for type 'SecondEnum' with an argument list of type '(rawValue: String?)'
enum SecondEnum: RawRepresentable {
case one
var rawValue: String { return "" }
init?(rawValue: String) {
fatalError()
}
init(rawValue: RawValue?) {
fatalError()
}
}
// error: value of optional type 'String?' not unwrapped; did you mean to use '!' or '?'? |
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Attachment: Download
Environment
```
swiftc --version
Apple Swift version 3.1 (swiftlang-802.0.53 clang-802.0.42)
Target: x86_64-apple-macosx10.9
```
Additional Detail from JIRA
md5: 8ff64ffe67c51133465e3d6c3f6367e1
Parent-Task:
Issue Description:
This bug has a complicated set of prerequisites to produce.
swiftc -O -whole-module-optimization ProxyStruct.swift main.swiftThe text was updated successfully, but these errors were encountered: