[clang] [APINotes] Avoid duplicate attributes when fields instantiate class templates (PR #173386)

[Susana Monteiro via cfe-commits]

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@@ -8,3 +8,12 @@ struct Box {
 
 using FloatBox = Box<float>;
 using IntBox = Box<int>;
+
+template <typename T>
+struct MoveOnly {
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susmonteiro wrote:

Sure! I'll add this test

https://github.com/llvm/llvm-project/pull/173386