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-rw-r--r--src/base/abc/abcDfs.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/base/abc/abcDfs.c b/src/base/abc/abcDfs.c
index bb960ddc..e1b042b8 100644
--- a/src/base/abc/abcDfs.c
+++ b/src/base/abc/abcDfs.c
@@ -970,7 +970,7 @@ Vec_Int_t * Abc_NtkNodeSupportInt( Abc_Ntk_t * pNtk, int iCo )
int Abc_NtkFunctionalIsoGia_rec( Gia_Man_t * pNew, Abc_Obj_t * pNode )
{
int iLit0, iLit1;
- if ( Abc_NodeIsTravIdCurrent(pNode) || Abc_ObjFaninNum(pNode) == 0 )
+ if ( Abc_NodeIsTravIdCurrent(pNode) || Abc_ObjFaninNum(pNode) == 0 || Abc_ObjIsCi(pNode) )
return pNode->iTemp;
assert( Abc_ObjIsNode( pNode ) );
Abc_NodeSetTravIdCurrent( pNode );