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[SR-1790] Adding protocol conformance to DispatchQueue gives dyld runtime errors. #44399

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swift-ci opened this issue Jun 16, 2016 · 2 comments
Closed

[SR-1790] Adding protocol conformance to DispatchQueue gives dyld runtime errors. #44399

swift-ci opened this issue Jun 16, 2016 · 2 comments
Labels
bug A deviation from expected or documented behavior. Also: expected but undesirable behavior. SDKOverlay

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Previous ID SR-1790
Radar https://openradar.appspot.com/26850367
Original Reporter mattgallagher (JIRA User)
Type Bug
Status Closed
Resolution Cannot Reproduce
Environment

Version 8.0 beta (8S128d)
Apple Swift version 3.0 (swiftlang-800.0.30 clang-800.0.24)
Base SDK 10.12
Tested on Mac OS X 10.11.5

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

md5: f50a97ffb18e5ff180a0f40484dc98b3

Issue Description:

In Xcode 8 beta 1/Swift 3, the following code:

protocol Nothing {}
extension DispatchQueue: Nothing {}

compiles and links then gives the following error at runtime:

dyld: Symbol not found: _OBJC_CLASS_$_OS_dispatch_queue
  Referenced from: /Users/matt/Library/Developer/Xcode/DerivedData/LinkTest-gstlyfegnnfpwhdvkejgjjkxjxwj/Build/Products/Debug/LinkTest
  Expected in: /usr/lib/libSystem.B.dylib
 in /Users/matt/Library/Developer/Xcode/DerivedData/LinkTest-gstlyfegnnfpwhdvkejgjjkxjxwj/Build/Products/Debug/LinkTest
@swift-ci
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Comment by Matt Gallagher (JIRA)

Looks like this is a duplicate of this:

https://openradar.appspot.com/radar?id=4624971611504640

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Comment by Matt Gallagher (JIRA)

I can no longer reproduce this bug in Xcode 8 beta 3. It appears to be fixed.

@swift-ci swift-ci transferred this issue from apple/swift-issues Apr 25, 2022
This issue was closed.
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bug A deviation from expected or documented behavior. Also: expected but undesirable behavior. SDKOverlay
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