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pocketfft_hdronly.h

@@ -1456,7 +1456,7 @@ template<bool fwd, typename T> void pass_all(T c[], T0 fct) const
       for (size_t i=0; i<length; ++i)
         c[i] = ch[i]*fct;
     else
-      std::copy (p1, p1+length, c);
+      std::copy_n (p1, length, c);
     }
   else
     if (fct!=1.)