[5.0] [ClangImporter] NS_ERROR_ENUMs can be redefined in separate modules #20572
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…wiftlang#20527) It's not something that /ought/ to happen, but when modules aren't quite set up properly (often by accident, thanks to header maps), we can get into basically this situation by having the definition end up in a header that's textually included into two different modules, or into a module and a bridging header. Handle that the same way we handle other redeclarations: have it show up in both modules. rdar://problem/45646620 (cherry picked from commit 647dd40)
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@swift-ci Please test macOS |
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Cherry-pick of #20527 to the swift-5.0-branch. Reviewed by @harlanhaskins.
rdar://problem/45646620
rdar://problem/46066125