[SR-11098] swiftc segfault when compiling in release mode #53493
Labels
bug
A deviation from expected or documented behavior. Also: expected but undesirable behavior.
compiler
The Swift compiler in itself
crash
Bug: A crash, i.e., an abnormal termination of software
optimized only
Flag: An issue whose reproduction requires optimized compilation
Comments
|
You can work around it in the meantime by disabling the speculative devirtualization optimisation pass: swift build -c release -Xswiftc "-Xllvm" -Xswiftc "-sil-disable-pass=specdevirt"I don't think this is a bug with specdevirt though, but possibly an optimisation pass before it. cc @eeckstein |
|
cc aschwaighofer@apple.com (JIRA User) |
|
The problem is in the source and that the type checker allows this: We have a covariant generic parameter type in a method override. This should not type check. public protocol ChildProtocol : ParentProtocol {
}
public class AnyParent : ParentProtocol {
public func unboxed<ParentType : ParentProtocol>() -> ParentType? {
}
}
public class AnyChild : AnyParent, ChildProtocol {
=> public override func unboxed<ChildType : ChildProtocol>() -> ChildType? {
} |
|
Should be fixed by #24484 |
|
aschwaighofer@apple.com (JIRA User) Confirmed fixed in latest master nightly |
|
Great |
|
Done! Sorry I did not know I had to close the issue as it was already marked Resolved 🙂 |
AnthonyLatsis
added
the
crash
This issue was closed.
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Environment
Tested on macOS with Swift 5.0.1 and 5.1 (swiftlang-1100.0.212.5 clang-1100.0.28.2), and on Linux with Swift 4.2.1.
Additional Detail from JIRA
md5: 39d19eb2ea75fefab810e98ddc4e4073
duplicates:
Issue Description:
The following project crashes when compiled with the the
-c releaseoption:https://gitlab.com/frizlab-demo-projects/swift-erasure-crash
Here’s the stack dump.
The text was updated successfully, but these errors were encountered: