Do not delete the nsIInputStream. Call Release() instead. Reference counting is important!!

htmlparser/src/nsScanner.cpp

@@ -54,7 +54,7 @@ CScanner::CScanner(nsIURL* aURL,eParseMode aMode) : mBuffer("") {
  */
 CScanner::~CScanner() {
   mStream->Close();
-  delete mStream;
+  mStream->Release();
 }
 
 

parser/htmlparser/src/nsScanner.cpp

@@ -54,7 +54,7 @@ CScanner::CScanner(nsIURL* aURL,eParseMode aMode) : mBuffer("") {
  */
 CScanner::~CScanner() {
   mStream->Close();
-  delete mStream;
+  mStream->Release();
 }