[compiler-rt] DO_NOT_MERGE (PR #66682)

[Florian Mayer via llvm-commits]

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@@ -427,6 +436,9 @@ class BaseReport {
     bool is_allocated = false;
   };
 
+  void CopyShadow();
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fmayer wrote:

Should we do the same as with `CopyAllocations`, i.e. return and assign?

https://github.com/llvm/llvm-project/pull/66682