1. Fix bug (using pDesign without check if == NULL)

2. Switch type of variables containing file size to (int => long)

src/base/io/ioReadBlifMv.c

@@ -548,10 +548,10 @@ typedef struct buflist {
   struct buflist * next;
 } buflist;
 
-char * Io_MvLoadFileBz2( char * pFileName, int * pnFileSize )
+char * Io_MvLoadFileBz2( char * pFileName, long * pnFileSize )
 {
     FILE    * pFile;
-    int       nFileSize = 0;
+    long       nFileSize = 0;
     char    * pContents;
     BZFILE  * b;
     int       bzError, RetValue;
@@ -628,12 +628,12 @@ char * Io_MvLoadFileBz2( char * pFileName, int * pnFileSize )
   SeeAlso     []
 
 ***********************************************************************/
-static char * Io_MvLoadFileGz( char * pFileName, int * pnFileSize )
+static char * Io_MvLoadFileGz( char * pFileName, long * pnFileSize )
 {
     const int READ_BLOCK_SIZE = 100000;
     gzFile pFile;
     char * pContents;
-    int amtRead, readBlock, nFileSize = READ_BLOCK_SIZE;
+    long amtRead, readBlock, nFileSize = READ_BLOCK_SIZE;
     pFile = gzopen( pFileName, "rb" ); // if pFileName doesn't end in ".gz" then this acts as a passthrough to fopen
     pContents = ABC_ALLOC( char, nFileSize );        
     readBlock = 0;
@@ -665,7 +665,7 @@ static char * Io_MvLoadFileGz( char * pFileName, int * pnFileSize )
 static char * Io_MvLoadFile( char * pFileName )
 {
     FILE * pFile;
-    int nFileSize;
+    long nFileSize;
     char * pContents;
     int RetValue;
     if ( !strncmp(pFileName+strlen(pFileName)-4,".bz2",4) )

src/base/io/ioUtil.c

@@ -157,8 +157,10 @@ Abc_Ntk_t * Io_ReadNetlist( char * pFileName, Io_FileType_t FileType, int fCheck
         fprintf( stdout, "Reading network from file has failed.\n" );
         return NULL;
     }
-    if ( fCheck && (Abc_NtkBlackboxNum(pNtk) || Abc_NtkWhiteboxNum(pNtk)) )
+
+    if ( fCheck && (Abc_NtkBlackboxNum(pNtk) || Abc_NtkWhiteboxNum(pNtk)) && pNtk->pDesign )
     {
+
         int i, fCycle = 0;
         Abc_Ntk_t * pModel;
 //        fprintf( stdout, "Warning: The network contains hierarchy.\n" );

src/opt/sim/simUtils.c

@@ -60,7 +60,8 @@ Vec_Ptr_t * Sim_UtilInfoAlloc( int nSize, int nWords, int fClean )
     int i;
     assert( nSize > 0 && nWords > 0 );
     vInfo = Vec_PtrAlloc( nSize );
-    vInfo->pArray[0] = ABC_ALLOC( unsigned, nSize * nWords );
+    vInfo->pArray[0] = ABC_ALLOC( unsigned, (long)nSize * (long)nWords );
+    assert( vInfo->pArray[0]);
     if ( fClean )
         memset( vInfo->pArray[0], 0, sizeof(unsigned) * nSize * nWords );
     for ( i = 1; i < nSize; i++ )