Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

[SR-6398] Constant strings cannot be deallocated: file Foundation/NSCFString.swift, line 118 #4053

Closed
swift-ci opened this issue Nov 15, 2017 · 1 comment

Comments

@swift-ci
Copy link
Contributor

swift-ci commented Nov 15, 2017

Previous ID SR-6398
Radar None
Original Reporter p_thompson (JIRA User)
Type Bug
Status Resolved
Resolution Done
Environment

Linux w/ Swift 4

Additional Detail from JIRA
Votes 0
Component/s Foundation
Labels Bug, RunTimeCrash
Assignee None
Priority Medium

md5: 8f4158106464e25abf1dd3e4e488841a

is duplicated by:

  • SR-6422 Encountering "Constant strings cannot be deallocated" in Linux foundation

Issue Description:

I have a block of code throwing this fatal error, that seems to require a larger setup to occur.

import Foundation

func default_components(bucket: String, key: String? = nil, query_items: [URLQueryItem] = []) -> URLComponents {
    var components = URLComponents()
    components.scheme = "https"
    components.host = "endpoint"
    components.path = key == nil ? "/\(bucket)" : "/\(bucket)/\(key!)"
    components.queryItems = query_items

    return components
}

func list_objects(in bucket: String, prefix: String = "", marker: String = "", delimiter: String = "", max_keys: Int = 1000) -> URLRequest {
    var components = default_components(bucket: bucket)
    components.queryItems?.append(URLQueryItem(name: "prefix", value: prefix))
    components.queryItems?.append(URLQueryItem(name: "max-keys", value: String(max_keys))) // I think this is the line that crashes. But reducing further than this somehow eliminates the crash
    components.queryItems?.append(URLQueryItem(name: "marker", value: marker))
    components.queryItems?.append(URLQueryItem(name: "delimiter", value: delimiter))


    let headers: [String: String] = [
        "Date": "\(Date())",
    ]

    var request = URLRequest(url: components.url!, timeoutInterval: 60)
    request.httpMethod = "GET"
    for (key, value) in headers {
        request.addValue(value, forHTTPHeaderField: key)
    }

    return request
}

list_objects(
    in: "bucket",
    marker: ""
)

Something about the `components.queryItems?.append(URLQueryItem(name: "max-keys", value: String(max_keys)))` part is causing this to trip, but I can't isolate it further than this. But the above block seems to reproduce reliably for me.

Fatal error: Constant strings cannot be deallocated: file Foundation/NSCFString.swift, line 118
Process 12600 stopped
* thread #​1, name = 'repl_swift', stop reason = signal SIGILL: illegal instruction operand
    frame #&#8203;0: 0x00007ffff7b2a800 libswiftCore.so`function signature specialization <preserving fragile attribute, Arg[1] = Exploded> of Swift._assertionFailure(Swift.StaticString, Swift.String, file: Swift.StaticString, line: Swift.UInt, flags: Swift.UInt32) -> Swift.Never + 144
libswiftCore.so`function signature specialization <preserving fragile attribute, Arg[1] = Exploded> of Swift._assertionFailure(Swift.StaticString, Swift.String, file: Swift.StaticString, line: Swift.UInt, flags: Swift.UInt32) -> Swift.Never:
->  0x7ffff7b2a800 <+144>: ud2    
    0x7ffff7b2a802:        nopw   %cs:(%rax,%rax)
libswiftCore.so`function signature specialization <preserving fragile attribute, Arg[0] = Exploded, Arg[1] = Dead> of static Swift.Unicode.hashASCII(Swift.UnsafeBufferPointer<Swift.UInt8>) -> Swift.Int:
    0x7ffff7b2a810 <+0>:   pushq  %rbp
    0x7ffff7b2a811 <+1>:   movq   %rsp, %rbp
Target 0: (repl_swift) stopped.
Execution interrupted. Enter code to recover and continue.
Enter LLDB commands to investigate (type :help for assistance.)
@parkera
Copy link
Member

parkera commented Dec 1, 2017

#1351

@swift-ci swift-ci transferred this issue from apple/swift-issues Apr 25, 2022
@shahmishal shahmishal transferred this issue from apple/swift May 5, 2022
This issue was closed.
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
Projects
None yet
Development

No branches or pull requests

2 participants