[SR-6618] ProcedureKit source breakage: error: instance method 'add(observer:)' in non-final class 'Procedure' cannot be used to satisfy requirement instance method 'add(observer:)' #49167
Labels
bug
A deviation from expected or documented behavior. Also: expected but undesirable behavior.
compiler
The Swift compiler in itself
regression
swift 4.1
Additional Detail from JIRA
md5: c0014323865910c25f3b98573e2e3f92
duplicates:
Issue Description:
To reproduce:
To build Swift from scratch before testing:
4. $ ./reproduce.py master --project-path ProcedureKit --assertions
Or if you've already built Swift:
4. $ ./reproduce.py master --project-path ProcedureKit --assertions --swiftc path/to/swiftc
XFAIL: error:, ProcedureKit, 3.1, 46bdfd, ProcedureKit, platform=macOS
https://ci.swift.org/job/swift-PR-source-compat-suite-test-macOS/67/artifact/swift-source-compat-suite/XFAIL_BuildXcodeProjectTarget_-ProcedureKit-xcodeproj_ProcedureKit_generic-platform-iOS.log
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