Index: apps/traincascade/imagestorage.cpp
===================================================================
--- apps/traincascade/imagestorage.cpp	(revision 2836)
+++ apps/traincascade/imagestorage.cpp	(working copy)
@@ -33,7 +33,10 @@
         pos = _filename.rfind('/');
         dlmrt = '/';
     }
-    dirname = _filename.substr(0, pos) + dlmrt;
+    if(pos == String::npos)
+        dirname = "";
+    else
+        dirname = _filename.substr(0, pos) + dlmrt;
     while( !file.eof() )
     {
         std::getline(file, str);
@@ -132,10 +135,22 @@
     if( !file )
         return false;
     short tmp = 0;  
-    fread( &count, sizeof( count ), 1, file );
-    fread( &vecSize, sizeof( vecSize ), 1, file );
-    fread( &tmp, sizeof( tmp ), 1, file );
-    fread( &tmp, sizeof( tmp ), 1, file );
+    int rfields = fread( &count, sizeof( count ), 1, file );
+    if(rfields != 1){
+        CV_Error_(CV_StsParseError, ("wrong file format for %s\n", _filename.c_str()));
+    }
+    rfields = fread( &vecSize, sizeof( vecSize ), 1, file );
+    if(rfields != 1){
+        CV_Error_(CV_StsParseError, ("wrong file format for %s\n", _filename.c_str()));
+    }
+    rfields = fread( &tmp, sizeof( tmp ), 1, file );
+    if(rfields != 1){
+        CV_Error_(CV_StsParseError, ("wrong file format for %s\n", _filename.c_str()));
+    }
+    rfields = fread( &tmp, sizeof( tmp ), 1, file );
+    if(rfields != 1){
+        CV_Error_(CV_StsParseError, ("wrong file format for %s\n", _filename.c_str()));
+    }
     base = sizeof( count ) + sizeof( vecSize ) + 2*sizeof( tmp );
     if( feof( file ) )
         return false;
@@ -149,8 +164,14 @@
 {
     CV_Assert( _img.rows * _img.cols == vecSize );
     uchar tmp = 0;
-    fread( &tmp, sizeof( tmp ), 1, file );
-    fread( vec, sizeof( vec[0] ), vecSize, file );
+    int rfields = fread( &tmp, sizeof( tmp ), 1, file );
+    if(rfields != 1){
+        CV_Error(CV_StsParseError, "wrong file format for positive examples file\n");
+    }
+    rfields = fread( vec, sizeof( vec[0] ), vecSize, file );
+    if(rfields != vecSize){
+        CV_Error(CV_StsParseError, "wrong file format for positive examples file\n");
+    }
 
     if( feof( file ) || last++ >= count )
         return false;