Weirdness on adding a book

When I added a book just now, the following appeared above the new book on the Add Books page:

Two

original ==> LC3746.I3
collection ==>
class ==> array:

letters ==> LC
number ==> 3746
letter_expansion ==> I
decimal_expansion ==> 3
string ==> LC3746.I3

cutter1 ==> array:

dot ==>
letter ==>
number ==>
suffix ==>
string ==>

cutter2 ==> array:

dot ==>
letter ==>
number ==>
suffix ==>
string ==>

the_rest ==>
abstractA ==> array:

class_main ==> L
class_secondary ==> C
number ==> 3746
letter_expansion ==> I
decimal_expansion ==> 3

elegant ==> array:

complete ==> LC3746.I3
abstract ==> LC3746.I3
minimal ==> LC3746.I3

inclasslistB ==> 1
validB ==> 1

NOTE! I added a second book and this did not appear.

ETA: If it helps, the books was History of Immigrant Female Students in Chicago Public Schools, and the source I used was Washington State University.

Looks like the same as https://www.librarything.com/topic/334958

>2 DuncanHill:

It does. I'll close this and report it over on that thread.

Thanks!

Closing as a duplicate of the one mentioned in >2 DuncanHill:.