Stack Overflow in if condition.

I have the following code where i try to recursively call a function:

 if( value == 1 ) function();

I tested and the value is not always 1 but i get a StackOverflow error when running. I can't seem to find the problem. I could use some help solving this.

Thanks in advance.

Edit:

 private void AddNeighbors( Vector2 o, Vector2 s )
     {
         //Debug.Log( "Called" + o );
         int notAdded = 0;
         
         // LEFT //
         int[ , ] left = GetRoom();
         int leftZeroCount = 0;
         for( int x = 0; x < left.GetLength( 0 ); ++x )
         {
             float a = o.x - left.GetLength( 0 ) + x;
             for( int y = 0; y < left.GetLength( 1 ); ++y )
             {
                 float b = o.y + y;
                 if( a > 0 && b > 0 && grid[ ( int )a, ( int )b ] == 0 )
                     ++leftZeroCount;
             }
         }
         if( leftZeroCount == left.GetLength( 0 ) * left.GetLength( 1 ) )
         {
             int add = Random.Range( 0, 2 );
             if( add == 1 )
             {
                 Vector2 origin = new Vector2( o.x - left.GetLength( 0 ), o.y );
                 for( int x = 0; x < left.GetLength( 0 ); ++x )
                 {
                     float a = origin.x + x;
                     for( int y = 0; y < left.GetLength( 1 ); ++y )
                     {
                         float b = origin.y + y;
                         grid[ ( int )a, ( int )b ] = left[ x, y ];
                     }
                 }
                 AddNeighbors(
                     origin,
                     new Vector2( left.GetLength( 0 ), left.GetLength( 1 ) )
                 );
             }
         else ++notAdded;
         }
         else ++notAdded;
         
         // CHECK IF ADDED //
         if( notAdded == 1 ) AddNeighbors( o, s );
     }

The GetRoom function returns an random int[ , ] composed of ones and zeros.