1:      1  1 CALL pred revise.main/2-0 (cc_multi) revise.m:13
mdb> echo on
Command echo enabled.
mdb> register --quiet
mdb> break p
 0: + stop  interface pred revise.p/2-0 (multi)
mdb> continue
       2:      2  2 CALL pred revise.p/2-0 (multi) revise.m:26 (revise.m:14)
mdb> finish
      14:      2  2 EXIT pred revise.p/2-0 (multi) revise.m:26 (revise.m:14)
mdb> dd -d 3 -n 7
p("foo", "foo")
Valid? no
q("foo", "foo")
Valid? yes
r("foo", "foo")
Valid? no
a("foo", "foo")
Valid? yes
b("foo", "foo")
Valid? yes
Found incorrect contour:
a("foo", "foo")
b("foo", "foo")
r("foo", "foo")
Is this a bug? no
r("foo", "foo")
Valid? [no] yes
s("foo", "foo")
Valid? yes
Found incorrect contour:
q("foo", "foo")
r("foo", "foo")
s("foo", "foo")
p("foo", "foo")
Is this a bug? no
p("foo", "foo")
Valid? [no] 
q("foo", "foo")
Valid? [yes] no
Found incorrect contour:
q("foo", "foo")
Is this a bug? yes
       4:      3  3 EXIT pred revise.q/2-0 (det) revise.m:28 (revise.m:26)
mdb> quit -y