In bugzilla when bug was marked as duplicate, there was link to new bug,
See T59877:
In T59877#642780, @Ricordisamoa wrote: This is quite surely due to cosmetic changes ("changements de type cosmétique") being enabled. This bug has been marked as a duplicate of bug 66921 ***
This is quite surely due to cosmetic changes ("changements de type cosmétique") being enabled.
words duplicate of bug 66921 should be link to T68921