[Sema] Fix a crash in use-before-declaration case #18466
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Check use-before-declaration early so we don't typecheck referenced decl which might depends on the reference. https://bugs.swift.org/browse/SR-7517 https://bugs.swift.org/browse/SR-8447 rdar://problem/39782719
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This was referenced Aug 3, 2018
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Check "use-before-declaration" early so we don't typecheck referenced decl which might depends on the reference.
https://bugs.swift.org/browse/SR-7517
https://bugs.swift.org/browse/SR-8447
rdar://problem/39782719