Does this sort of thing happen very often?

I found a problem with NMH 1.04 on my Ultra 5+.  The "scan" program was
calling every message in all my folders "?4128":

netbsd4me# pwd
/usr/pkgsrc/mail/nmh/work/nmh-1.0.4/uip
netbsd4me# rm scansbr.o
netbsd4me# make scan
cc -c -DHAVE_CONFIG_H -I.. -I. -I..  -O2 scansbr.c
cc -s -o scan scan.o scansbr.o termsbr.o ../config/version.o ../config/config.o ../sbr/libmh.a ../mts/sendmail/libsend.a ../zotnet/libzot.a    -ltermcap
netbsd4me# su earle -c "./scan +MiNa"
?4128  10/07 "MiNa             hi<<helloooooooo -------------------------------

This only happens if "CFLAGS" is "-O2".

netbsd4me# rm scansbr.o
netbsd4me# make CFLAGS=-g scan
cc -c -DHAVE_CONFIG_H -I.. -I. -I..  -g scansbr.c
cc -s -o scan scan.o scansbr.o termsbr.o ../config/version.o ../config/config.o ../sbr/libmh.a ../mts/sendmail/libsend.a ../zotnet/libzot.a    -ltermcap
netbsd4me# su earle -c "./scan +MiNa"
    1  10/07 "MiNa             hi<<helloooooooo -------------------------------

It works correctly if "CFLAGS" is empty, "-g" or "-O".  But doesn't work if
it's "-O2".  Optimizer buglet?

	- Greg