magic causes different result

[DerZc]

Hi,

Consider the following program:

.decl yona(A:symbol, C:float)
.decl idck(B:float) magic
.decl zsjo(A:float) 

yona("DrdskfIQ9A", 0).

idck(A) :- yona(D, A).
zsjo(D) :- idck(D), idck(min(-D,D)).

.output zsjo

This program has an empty result in interpreter mode. But if I remove the magic keyword, the result becomes 0.
I notice that there was a similar issue #1732, but I modify magic to inline, the result still is 0, which equals to that of without any keyword.
I found this problem on version 3cd802d