pika failing since the per-column collation patch

Hi,

Since the per-column collation patch went in, pika (NetBSD 5.1/mips) started failing consistently with this diff:

*** /home/pgbuildfarm/workdir/HEAD/pgsql.15101/src/test/regress/expected/polymorphism.out    Sat Feb 12 02:16:07 2011
--- /home/pgbuildfarm/workdir/HEAD/pgsql.15101/src/test/regress/results/polymorphism.out    Sat Feb 12 09:10:21 2011
***************
*** 624,630 ****  -- such functions must protect themselves if varying element type isn't OK select
max(histogram_bounds)from pg_stats; 
! ERROR:  cannot compare arrays of different element types -- test variadic polymorphic functions create function
myleast(variadicanyarray) returns anyelement as $$   select min($1[i]) from generate_subscripts($1,1) g(i) 
--- 624,630 ----  -- such functions must protect themselves if varying element type isn't OK select
max(histogram_bounds)from pg_stats; 
! ERROR:  locale operation to be invoked, but no collation was derived -- test variadic polymorphic functions create
functionmyleast(variadic anyarray) returns anyelement as $$   select min($1[i]) from generate_subscripts($1,1) g(i) 

Is there something I can do to help investigate this ?

Regards,

Rémi Zara