Fixing corner-cases in 'tempor' and in 'unfold'.

src/aig/gia/giaDup.c

@@ -3068,6 +3068,11 @@ Gia_Man_t * Gia_ManDupWithConstr( Gia_Man_t * p )
         printf( "The miter's output is not AND-decomposable.\n" );
         return NULL;
     }
+    if ( Gia_ObjFaninId0p(p, pObj) == 0 )
+    {
+        printf( "The miter's output is a constant.\n" );
+        return NULL;
+    }
     vSuper = Vec_IntAlloc( 100 );
     Gia_ManDupWithConstrCollectAnd_rec( p, Gia_ObjChild0(pObj), vSuper, 1 );
     assert( Vec_IntSize(vSuper) > 1 );

src/base/abci/abc.c

@@ -23548,6 +23548,11 @@ int Abc_CommandTempor( Abc_Frame_t * pAbc, int argc, char ** argv )
         Abc_Print( 0, "The current network is combinational.\n");
         return 0;
     }
+    if ( Abc_NtkPiNum(pNtk) == 0 )
+    {
+        Abc_Print( 0, "The current network does not have primary inputs. Use \"addpi\".\n");
+        return 0;
+    }
     if ( fUpdateCex )
     {
         Abc_Cex_t * pCexNew;
@@ -24020,12 +24025,12 @@ int Abc_CommandUnfold( Abc_Frame_t * pAbc, int argc, char ** argv )
         Gia_Man_t * pGia = Gia_ManFromAigSimple( pAig );
         Aig_ManStop( pAig );
         pNew = Gia_ManDupWithConstr( pGia );
+        Gia_ManStop( pGia );
         if ( pNew == NULL )
         {
             Abc_Print( -1, "Cannot extract constrains from the miter.\n" );
             return 0;
         }
-        Gia_ManStop( pGia );
         pAig = Gia_ManToAigSimple( pNew );
         Gia_ManStop( pNew );
         pNtkRes = Abc_NtkFromAigPhase( pAig );