Logan Smith 092a57f508 [libc++] Fix unqualified call to 'ref' inside shared_ptr(unique_ptr<U, D>)
This prevents unintended ADL: https://gcc.godbolt.org/z/EHw3Gy
This issue was mentioned as an addendum in PR44398.

Differential Revision: https://reviews.llvm.org/D74289
2020-02-20 12:24:40 -05:00
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