check for self-assign

Change-Id: I6ffaaa36f2e594a2e8155589a4d7000db21ab30b

2 files changed, 6 insertions, 0 deletions

diff --git a/tools/source/generic/bigint.cxx b/tools/source/generic/bigint.cxx
index e7a98b5eebec..3311efd459b5 100644
--- a/tools/source/generic/bigint.cxx
+++ b/tools/source/generic/bigint.cxx
@@ -616,6 +616,9 @@ BigInt::operator double() const
 
 BigInt& BigInt::operator=( const BigInt& rBigInt )
 {
+    if (this == &rBigInt)
+        return *this;
+
     if ( rBigInt.bIsBig )
         memcpy( (void*)this, (const void*)&rBigInt, sizeof( BigInt ) );
     else
diff --git a/tools/source/generic/poly2.cxx b/tools/source/generic/poly2.cxx
index 7ef7df199f4f..0262a36a0af6 100644
--- a/tools/source/generic/poly2.cxx
+++ b/tools/source/generic/poly2.cxx
@@ -521,6 +521,9 @@ Polygon& PolyPolygon::operator[]( sal_uInt16 nPos )
 
 PolyPolygon& PolyPolygon::operator=( const PolyPolygon& rPolyPoly )
 {
+    if (this == &rPolyPoly)
+        return *this;
+
     DBG_ASSERT( rPolyPoly.mpImplPolyPolygon->mnRefCount < 0xFFFFFFFE, "PolyPolygon: RefCount overflow" );
 
     rPolyPoly.mpImplPolyPolygon->mnRefCount++;