re-builder highlighting incorrect for more than 3 groupings

[Christian Plate]

Hello,

I encountered strange behavior with re-builder:

I made a testcase to show it. Consider the following buffer:

t-t-t-t
t-t-t-t
t-t-t-t
t-t-t-t

re-builder with the regex "\\(.\\)-\\(.\\)-\\(.\\)" correctly highlights
all first groupings. But if i make another group,
"\\(.\\)-\\(.\\)-\\(.\\)-\\(.\\)", it only highlights the first
match. Perhaps this has something to do with missing faces for more than
three groupings.

 Christian Plate