testlist <- list(ix = c(-621726556L, -1331494887L, 1854878590L, 314985932L,  1361933119L, -1262797933L, -1571830262L, -555281357L, 1176038391L,  -1125445590L, 2051319948L, -555281357L, 600611799L, -2015925719L,  640758675L, -2045256755L, 818332908L, -1294723540L, 415152419L,  -1290633258L, -568676763L, -250049000L, 1237429200L, -645489399L,  1298265599L, 889924430L, -907775620L, -152022060L), jx = c(352546080L,  77995038L, 1848672759L, -273393355L, -2067478347L, 609885071L,  416334778L, -176991733L, 2009017211L, 1715968468L, 1998244710L,  -836461486L, -396097780L, -1088185385L), ti = c(1700650460L,  NA, -857761356L, 1134608386L, -1017390666L, -1184194678L, 1318245361L,  -1315440106L, -187174036L, 2134291275L, 357367640L, -323003472L,  439641811L, -1627038227L, -1741627831L, -942121028L, -1353570258L,  -1998882403L, 662238740L, 928105553L, -2060835804L, 813765064L,  -1292955271L, -948947594L, -1017207733L, 958261601L, -1780517428L,  809049525L, 1665260179L, -1007985803L, -613618014L, -584836704L,  -2101482565L, -606856080L, -1282327069L, -900032210L, -1670135457L,  1579013177L, -1983718298L, -420149656L, -1292753779L, -968819078L,  -767861348L, -1778988495L, 1770819784L, -1453063886L, 668834061L,  -761301371L, -1852173736L, -636431700L, 1261390305L, 638784143L,  -1616685240L, 123304750L, 907295753L, -1280143803L, 1285594406L,  -1318071300L, -1642275388L, 804279503L, -1817503846L, 76728635L,  -1509604262L, -1210933501L, NA, -1409540023L, 419237448L, -312338560L,  221125394L, -1042002585L, -376323680L, 1667277781L, -1664288441L,  -921071135L, 379529476L, 21005326L, 1872699440L, -2089969812L,  -27718559L, -1179699370L, 2083560773L, 1227761247L, -850369586L,  -1863787009L, -2013450485L, 1808234345L, 545573849L, 855781295L,  852358267L, -82060599L, 1799264251L, 645200813L, 1915402461L),      tj = c(845481764L, -1790102199L, 1595945074L, 1002944546L,      1400374777L, 330370028L, -182916179L, 546887506L, -35752302L,      732748682L, -871629561L, -743101914L, 758062913L, -517329450L,      1108968290L, -1319455314L, 942358627L, -686035292L, 652979193L,      -1596645427L, 88018662L, 1765588140L, 1430195718L, -1715227439L,      -269208378L, 253913653L, 219557805L, -347178000L))
result <- do.call(multbxxc:::match_ij,testlist)
str(result)