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d7fb086668
Some months ago, the LookupInfo constructor logic was refactored to not depend on language specific logic, and use languages plugins instead. In this refactor, when the language type is unknown, a single LookupInfo object will handle multiple languages. This doesn't work well, as multiple languages might want to configure the LookupInfo object in different ways. For example, different languages might want to set the m_lookup_name differently from each other, but the previous implementation would pick the first name a language provided, and effectively ignored every other language. Other fields of the LookupInfo object are also configured in incompatible ways. This approach doesn't seem to be a problem upstream, since only the C++/Objective-C language plugins are available, but it broke downstream on the Swift fork, as adding Swift to the list of default languages when the language type is unknown breaks C++ tests. This patch makes it so instead of building a single LookupInfo object for multiple languages, one LookupInfo object is built per language instead. rdar://159531216