8 files changed, 16 insertions, 8 deletions
diff --git a/webkit/api/src/WebData.cpp b/webkit/api/src/WebData.cpp
index f4ec81a..6aafe79 100644
--- a/webkit/api/src/WebData.cpp
+++ b/webkit/api/src/WebData.cpp
@@ -51,7 +51,8 @@ void WebData::reset()
 void WebData::assign(const WebData& other)
 {
     WebDataPrivate* p = const_cast<WebDataPrivate*>(other.m_private);
-    p->ref();
+    if (p)
+        p->ref();
     assign(p);
 }
 
diff --git a/webkit/api/src/WebDragData.cpp b/webkit/api/src/WebDragData.cpp
index facbcd2..df9991c 100644
--- a/webkit/api/src/WebDragData.cpp
+++ b/webkit/api/src/WebDragData.cpp
@@ -59,7 +59,8 @@ void WebDragData::reset()
 void WebDragData::assign(const WebDragData& other)
 {
     WebDragDataPrivate* p = const_cast<WebDragDataPrivate*>(other.m_private);
-    p->ref();
+    if (p)
+        p->ref();
     assign(p);
 }
 
diff --git a/webkit/api/src/WebForm.cpp b/webkit/api/src/WebForm.cpp
index 3ab7c4a..8b1c6b5 100644
--- a/webkit/api/src/WebForm.cpp
+++ b/webkit/api/src/WebForm.cpp
@@ -49,7 +49,8 @@ void WebForm::reset()
 void WebForm::assign(const WebForm& other)
 {
     WebFormPrivate* p = const_cast<WebFormPrivate*>(other.m_private);
-    p->ref();
+    if (p)
+        p->ref();
     assign(p);
 }
 
diff --git a/webkit/api/src/WebHTTPBody.cpp b/webkit/api/src/WebHTTPBody.cpp
index bd66b08..335ed5c 100644
--- a/webkit/api/src/WebHTTPBody.cpp
+++ b/webkit/api/src/WebHTTPBody.cpp
@@ -53,7 +53,8 @@ void WebHTTPBody::reset()
 void WebHTTPBody::assign(const WebHTTPBody& other)
 {
     WebHTTPBodyPrivate* p = const_cast<WebHTTPBodyPrivate*>(other.m_private);
-    p->ref();
+    if (p)
+        p->ref();
     assign(p);
 }
 
diff --git a/webkit/api/src/WebHistoryItem.cpp b/webkit/api/src/WebHistoryItem.cpp
index 77c0edc..d4ee50a 100644
--- a/webkit/api/src/WebHistoryItem.cpp
+++ b/webkit/api/src/WebHistoryItem.cpp
@@ -60,7 +60,8 @@ void WebHistoryItem::reset()
 void WebHistoryItem::assign(const WebHistoryItem& other)
 {
     WebHistoryItemPrivate* p = const_cast<WebHistoryItemPrivate*>(other.m_private);
-    p->ref();
+    if (p)
+        p->ref();
     assign(p);
 }
 
diff --git a/webkit/api/src/WebNotification.cpp b/webkit/api/src/WebNotification.cpp
index 2b2e3bb..ba1dcba 100644
--- a/webkit/api/src/WebNotification.cpp
+++ b/webkit/api/src/WebNotification.cpp
@@ -54,7 +54,8 @@ void WebNotification::reset()
 void WebNotification::assign(const WebNotification& other)
 {
     WebNotificationPrivate* p = const_cast<WebNotificationPrivate*>(other.m_private);
-    p->ref();
+    if (p)
+        p->ref();
     assign(p);
 }
 
diff --git a/webkit/api/src/WebRange.cpp b/webkit/api/src/WebRange.cpp
index aa101c90..ea1f168 100644
--- a/webkit/api/src/WebRange.cpp
+++ b/webkit/api/src/WebRange.cpp
@@ -51,7 +51,8 @@ void WebRange::reset()
 void WebRange::assign(const WebRange& other)
 {
     WebRangePrivate* p = const_cast<WebRangePrivate*>(other.m_private);
-    p->ref();
+    if (p)
+        p->ref();
     assign(p);
 }
 
diff --git a/webkit/api/src/WebSecurityOrigin.cpp b/webkit/api/src/WebSecurityOrigin.cpp
index f1641e3..c0563af 100644
--- a/webkit/api/src/WebSecurityOrigin.cpp
+++ b/webkit/api/src/WebSecurityOrigin.cpp
@@ -50,7 +50,8 @@ void WebSecurityOrigin::reset()
 void WebSecurityOrigin::assign(const WebSecurityOrigin& other)
 {
     WebSecurityOriginPrivate* p = const_cast<WebSecurityOriginPrivate*>(other.m_private);
-    p->ref();
+    if (p)
+        p->ref();
     assign(p);
 }