[SR-10458] EXC_BAD_ACCESS when calling URL(string:) API

[swift-ci]

Previous ID	SR-10458
Radar	None
Original Reporter	leonid.kokhnovych (JIRA User)
Type	Bug

Attachment: Download

Environment

Version 10.2 (10E125)

Swift 5.0

Mac OS 10.14.4

Additional Detail from JIRA

Votes	0
Component/s	Compiler, Foundation, Standard Library
Labels	Bug, RunTimeCrash
Assignee	None
Priority	Medium

md5: da3eaf8c5f11e2f7f8f57f9ede691808

Issue Description:

Hi everyone! I have an issue that I'm not able to constantly reproduce, but want to share in case someone has a clue what might be going on.

I'm getting the following crash error

EXC_BAD_ACCESS (code=1, address=0x0)

when running the code similar to something below (can't share the original code due to software license):

internal enum Server {
    case ServerFromList(path: String)


    var url: URL? {
        switch self {
        case .ServerFromList(let path):
            return URL(string: path)
        }
    }
}


let server = Server.ServerFromList(path: "https://www.forticloud.com")
print("\(server.url)")
print("test")

The stack trace is:

po Thread.callStackSymbols
▿ 46 elements
  - 0 : "0   ???                                 0x00000001468a3a08 0x0 + 5478431240"
  - 1 : "1   ???                                 0x00000001468a3aab 0x0 + 5478431403"
  - 2 : "2   FortiExplorer                       0x00000001064c42f0 main + 0"
  - 3 : "3   libswiftCore.dylib                  0x00000001145926f9 $sSS23_bridgeToObjectiveCImplyXlyF + 9"
  - 4 : "4   libswiftFoundation.dylib            0x0000000114cbd45a $s10Foundation3URLV6stringACSgSSh_tcfC + 90"
  - 5 : "5   FortiExplorerCore                   0x0000000112bbc305 $s17FortiExplorerCore0A12CloudRequestC6ServerO3url10Foundation3URLVSgvg + 901"
...

The Xcode stack trace looks like:


A few more details about the input path:

(lldb) po type(of: path)
Swift.String


(lldb) po dump(path)
- "https://www.forticloud.com"
"https://www.forticloud.com"

[belkadan]

@milseman, does this look familiar at all?

Leonid, is the project one you can share with just Apple at https://bugreport.apple.com? I don't know how much progress we'll be able to make with just this.

[milseman]

@Catfish-Man, any idea what could be going wrong?

[Catfish-Man]

One relatively likely one given this is bridging is that the incoming object was overreleased and replaced by something else.

Though the lldb backtrace looks like stack corruption, so maybe not?

[swift-ci]

Comment by Leonid Kokhnovych (JIRA)

@belkadan Thanks for your response. I can't share the full source code, sorry... I will try to spend more time to reproduce the issue and will provide more info if I have something to share.