--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test-data/column_join_in2.pileup	Tue Apr 01 09:30:45 2014 -0400
@@ -0,0 +1,30 @@
+chrM	1	T	G	25	0	25	1	^:.	I
+chrM	2	C	A	25	0	25	1	.	I
+chrM	3	C	A	25	0	25	2	..	I+
+chrM	4	G	A	36	0	25	3	.^:.^:.	II+
+chrM	5	A	T	36	0	25	3	...	IDI
+chrM	6	A	G	36	0	25	4	..T.	IIBI
+chrM	7	C	G	42	0	25	5	...^:.^:.	ID@II
+chrM	8	T	T	45	0	25	6	.....^:.	III$BI
+chrM	9	C	A	51	0	25	8	......^:.^:.	$#III+III
+chrM	10	G	G	54	0	25	9	........^:.	III$III#I
+chrM	11	T	C	57	0	25	10	.........^:.	IIIDBIIIII
+chrM	12	A	T	60	0	25	11	..........^:.	IIIIIIIII$I
+chrM	13	A	T	78	0	25	18	..A.........^:.^:.^:.^:.^:.^:.	III#$IIIIII+IIDIIB
+chrM	14	G	A	56	0	25	19	........T.........^:.	BIIIIIII+IIII$IBIII
+chrM	15	G	A	87	0	25	20	..................^:.^:.	DIIIIIII(IIIIIIIIIII
+chr1	1	T	T	87	0	25	20	.............T......	IIIIIIIIIIII$DIIIIII
+chr1	2	A	T	87	0	25	20	......G.............	9IIIIIIIIIIIIICBIIII
+chr1	3	A	G	87	0	25	20	....A...............	@IIIIIIIII#IIII#IIII
+chr1	4	A	T	55	0	25	20	..................GG	IIIII@II$IIIIIIIII'A
+chr1	5	C	A	54	0	25	20	.......A..........C.	IIIIIIIIIDIIIII2II#$
+chr1	6	G	T	87	0	25	20	.............A......	IIIIIIIBIIIIII#IIIII
+chr1	7	A	C	87	0	25	20	..........C.........	IIIII+IIIIIIIIAIIIII
+chr1	8	G	A	87	0	25	20	....G.........T.....	9IIIIIIIIII0IIIIIIII
+chr1	9	A	T	87	0	25	20	........N...........	IIII$III"IIIIICIIIII
+chr1	10	G	A	57	0	25	21	...A................^:.	A@.$IIIIIIIFIIIIIIIII
+chr1	11	C	A	57	0	25	22	....G...A.............	IIHIDII&IIIIII#III$II
+chr1	12	T	A	99	0	25	24	.....................^:.^:.^:.	IE8IFIII9IIIIIIIIIIIIIII
+chr1	13	A	C	99	0	25	25	...N.....................	1FIIIIIIIIIIIIIIIIDEII$II
+chr1	14	G	C	55	0	25	25	....G..............NN....	;IIIBIII+HII=IIIIII""IIII
+chr1	15	T	G	68	0	25	28	...C.......N............^:.	;I?&IAI0IIIIIII@II#$II@II