Only fill in holes if storing the number to the double array has succeeded.

src/x64/stub-cache-x64.cc

Index: src/x64/stub-cache-x64.cc
diff --git a/src/x64/stub-cache-x64.cc b/src/x64/stub-cache-x64.cc
index cd0124b03253a2964ea232be67864c220f6f9b22..683aa9d40904bcaf3cd75c7e510d50f5d9a1f014 100644
--- a/src/x64/stub-cache-x64.cc
+++ b/src/x64/stub-cache-x64.cc
@@ -4108,16 +4108,16 @@ void KeyedStoreStubCompiler::GenerateStoreFastDoubleElement(
     __ Move(FieldOperand(rdi, FixedDoubleArray::kLengthOffset),
             Smi::FromInt(JSArray::kPreallocatedArrayElements));
 
-    __ movq(r8, BitCast<int64_t, uint64_t>(kHoleNanInt64), RelocInfo::NONE);
-    for (int i = 1; i < JSArray::kPreallocatedArrayElements; i++) {
-      __ movq(FieldOperand(rdi, FixedDoubleArray::OffsetOfElementAt(i)), r8);
-    }
-
     // Increment the length of the array.
     __ SmiToInteger32(rcx, rcx);
     __ StoreNumberToDoubleElements(rax, rdi, rcx, xmm0,
                                    &restore_key_transition_elements_kind);
 
+    __ movq(r8, BitCast<int64_t, uint64_t>(kHoleNanInt64), RelocInfo::NONE);
+    for (int i = 1; i < JSArray::kPreallocatedArrayElements; i++) {
+      __ movq(FieldOperand(rdi, FixedDoubleArray::OffsetOfElementAt(i)), r8);
+    }
+
     // Install the new backing store in the JSArray.
     __ movq(FieldOperand(rdx, JSObject::kElementsOffset), rdi);
     __ RecordWriteField(rdx, JSObject::kElementsOffset, rdi, rbx,