--- a/mailnews/compose/src/nsMsgAttachment.cpp
+++ b/mailnews/compose/src/nsMsgAttachment.cpp
@@ -241,16 +241,28 @@ NS_IMETHODIMP nsMsgAttachment::EqualsUrl
 
 nsresult nsMsgAttachment::DeleteAttachment() {
   nsresult rv;
   bool isAFile = false;
 
   nsCOMPtr<nsIFile> urlFile;
   rv = NS_GetFileFromURLSpec(mUrl, getter_AddRefs(urlFile));
   NS_ASSERTION(NS_SUCCEEDED(rv), "Can't nsIFile from URL string");
+#ifdef DEBUG
+  if (!NS_SUCCEEDED(rv)) {
+    int rc = 0;
+#ifdef linux
+    rc = system("ls -ltr /tmp/");
+#endif
+    fprintf(stderr,
+            "{debug} DeleteAttachment: rv = 0x%" PRIx32
+            ", mUrl.data()==<<%s>>, rc=%d\n",
+            static_cast<uint32_t>(rv), mUrl.Data(), rc);
+  }
+#endif
   if (NS_SUCCEEDED(rv)) {
     bool bExists = false;
     rv = urlFile->Exists(&bExists);
     NS_ASSERTION(NS_SUCCEEDED(rv), "Exists() call failed!");
     if (NS_SUCCEEDED(rv) && bExists) {
       rv = urlFile->IsFile(&isAFile);
       NS_ASSERTION(NS_SUCCEEDED(rv), "IsFile() call failed!");
     }