Swap to locked gems is allowed, but they are not matched

[JohannesBuchner]

This vertical move is allowed, but should not be. Or the match should be performed.

1
4 X1L X1L

Debug information

I was playing this board:

BOARD: 8x8
 4   1   1  X3L X1L  4   2   4  
 3   3   4  X2L =2L  1   3   4  
 1   2   2  |0L |2L  4   3   1  
 1   2   4  |3L X2L  3   4   1  
 2   3   1  X1L X1L  3   2   3  
X3L |2L |2L |3L X1L =2L X1L |0L 
|2L X2L X0L X0L X3L X3L |2L =0L 
X0L X2L =0L =3L X0L X0L X1L X3L 

with 4 colors, 10 swaps. Goal 1 of type=5.

17: after paircomb.run:

BOARD: 8x8
 4   1   1  X3L X1L  4   2   4  
 3   3   4  X2L =2L  1   3   4  
 1   2   2  |0L |2L  4   3   1  
 1   2   4  |3L X2L  3   4   1  
 2   3   1  X1L X1L  3   2   3  
X3L |2L |2L |3L X1L =2L X1L |0L 
|2L X2L X0L X0L X3L X3L |2L =0L 
X0L X2L =0L =3L X0L X0L X1L X3L 

16. possible moves:

• 2,6 -> 2,5
• 3,2 -> 4,2
• 2,2 -> 1,2
• 2,5 -> 2,6
• 3,5 -> 3,6
• 4,0 -> 4,1
• 3,1 -> 4,1
• 4,2 -> 3,2
• 4,1 -> 3,1
• 3,6 -> 3,5
• 1,2 -> 2,2
• 4,1 -> 4,0
  15: acto (no change)
  14: comb (no change)
  13: topfill (no change)
  12: grav (no change)
  11: after topfill:

BOARD: 8x8
 4   1   1  X3L X1L  4   2   4  
 3   3   4  X2L =2L  1   3   4  
 1   2   2  |0L |2L  4   3   1  
 1   2   1  |3L X2L  3   4   1  
 2   3   4  X1L X1L  3   2   3  
X3L |2L |2L |3L X1L =2L X1L |0L 
|2L X2L X0L X0L X3L X3L |2L =0L 
X0L X2L =0L =3L X0L X0L X1L X3L