probe design - bug in split calculation

[westram]

fails assertion

pt_split.h:116: Assertion 'is_std_base(base) && is_std_base(ref)' failed

in

#0  Splits::check (this=0x7fffffffd760, base=2 '\002', ref=1 '\001') at pt_split.h:117
#1  0x00000000004a557e in MatchingOligo::bind_against (this=0x7fffffffcc70, c=1 '\001', splits=...) at PT_new_design.cxx:212
#2  0x00000000004a6c6a in OutgroupMatcher::bind_rest (this=0x7fffffffd750, oligo=..., loc=..., height=11) at PT_new_design.cxx:944
#3  0x00000000004a6eb8 in OutgroupMatcher::bind_rest_if_outside_group (this=0x7fffffffd750, oligo=..., loc=..., height=11) at PT_new_design.cxx:962
#4  0x00000000004a7212 in OutgroupMatcher::bind_rest (this=0x7fffffffd750, oligo=..., pt=0x7ffff157efa5, height=11) at PT_new_design.cxx:994
#5  0x00000000004a71c1 in OutgroupMatcher::bind_rest (this=0x7fffffffd750, oligo=..., pt=0x7ffff157efbe, height=10) at PT_new_design.cxx:988
#6  0x00000000004a7aa5 in OutgroupMatcher::bind_till_domain (this=0x7fffffffd750, oligo=..., pt=0x7ffff157efc9, height=9) at PT_new_design.cxx:1054
#7  0x00000000004a7ae0 in OutgroupMatcher::bind_till_domain (this=0x7fffffffd750, oligo=..., pt=0x7ffff157efcf, height=8) at PT_new_design.cxx:1055
#8  0x00000000004a7ae0 in OutgroupMatcher::bind_till_domain (this=0x7fffffffd750, oligo=..., pt=0x7ffff157f213, height=7) at PT_new_design.cxx:1055
#9  0x00000000004a7ae0 in OutgroupMatcher::bind_till_domain (this=0x7fffffffd750, oligo=..., pt=0x7ffff157f21e, height=6) at PT_new_design.cxx:1055
#10 0x00000000004a7ae0 in OutgroupMatcher::bind_till_domain (this=0x7fffffffd750, oligo=..., pt=0x7ffff1596f24, height=5) at PT_new_design.cxx:1055
#11 0x00000000004a7ae0 in OutgroupMatcher::bind_till_domain (this=0x7fffffffd750, oligo=..., pt=0x7ffff15a66a2, height=4) at PT_new_design.cxx:1055
#12 0x00000000004a7ae0 in OutgroupMatcher::bind_till_domain (this=0x7fffffffd750, oligo=..., pt=0x7ffff667aa90, height=3) at PT_new_design.cxx:1055
#13 0x00000000004a7ae0 in OutgroupMatcher::bind_till_domain (this=0x7fffffffd750, oligo=..., pt=0x7ffff667aaf8, height=2) at PT_new_design.cxx:1055
#14 0x00000000004a7ae0 in OutgroupMatcher::bind_till_domain (this=0x7fffffffd750, oligo=..., pt=0x7ffff667ab08, height=1) at PT_new_design.cxx:1055
#15 0x00000000004a7ae0 in OutgroupMatcher::bind_till_domain (this=0x7fffffffd750, oligo=..., pt=0x7ffff667b0c1, height=0) at PT_new_design.cxx:1055
#16 0x00000000004a7fb1 in OutgroupMatcher::calculate_outgroup_matches (this=0x7fffffffd750, tprobe=...) at PT_new_design.cxx:1098
#17 0x0000000000475251 in PT_start_design (pdc=0x9b6b70) at PT_new_design.cxx:1487