testlist <- list(lmd = c(3.51837721683551e+217, -1.4589380306107e-19, 1.03738116059816e+29,  1.69693613316874e-16, 0.957693818119268, -5.08834775106989e+260,  -6.29095691231313e+97, 1.26164144081533e+93, 1.89909637818446e-217,  -1.21164346271706e+122, -3.58424176012391e-102, 8.2776841892226e-75,  1.05113831150963e+204, NA, 3.82260460901584e+239, 3.59722153122156e-212,  5.63962903752167e-279, -1.65105584493624e-68, -1.59465062045585e-164,  1.44444267323259e+208, 9.98967383663969e+82, 2.95846666743074e+235,  -3.47233071624791e-105, -3.84231427225424e-180, 3.19138402403142e+191,  -7.86562386645901e+302, 8.37481659826131e-244, 1.07729923066322e+214,  9.1057816477464e+223, 1.67295657941277e-53, 1.69581928058438e-255,  1.4197346358434e-52, NA, -3.62228613145635e-168, -Inf, -3.28987807628566e+41,  4.97257744093465e-164, -4.35449829099984e-95, -4.14316086644237e-225,  -3.01732210399015e+29, -9.39397491681059e-194, -7.32837349977466e-168,  -1.8848909115871e-112, Inf, 1.52377672749323e+221, 5.43336241177086e+215,  -4.62813325322558e+48, 3.28677586374991e-152, 3.02641555011519e+302,  1.71297875631963e+273, -2.06524392513697e-222, -2.23194791854231e+226,  -6.37405565803634e+278, 2.32610410998317e+275, -2.77278996141218e-71,  -3.0623357453093e+117, 1.91778267871751e-13, -1.42248294634072e-305,  -8.90346434434045e+175, 1.41458785960295e-128, -1.59536224338429e+260,  -4.81517809699878e-19, 3.84902087524933e+46, -8.27727793921683e+54,  -1.15369587520766e+228, 1.00863281321079e-107, 3.2418818409166e-168,  -1.88134960290412e+282, 1.50907357969493e+248, 0), mu = c(-1.52238653515749e-36,  7.81653747098598e+182, 5.5039521720382e-226, 3.12871617509529e+229,  -2.47405682278543e-27, -2.23701777308771e-52, -3.2186894466334e+185,  -1.22435237228502e-48, 1.36177818877588e+179, -3.35398856195527e-76,  -9.8826276603953e-120, -2.80439824877749e+88, -4.34090658026237e+183,  NA, -1.50033005811135e-210, -4.40096151667048e+248, 1.11744342662879e-156,  8.40976982670374e+282, 2.90486593546266e+220, -1.14708996584552e-299,  NaN, -1.35474071633101e-82, -7.17822519750508e+127, -3.83975005175775e+155,  -8.90745692903561e+117, 5.01890984340985e-170, 9.6347918638195e+288,  3.79404377807382e+272, 9.54463703891436e+297, -1.86549929274537e-33,  NA, 1.17770669213681e-273, -1.67396378341986e-182, 1.61960126417086e-159,  -4.63758364137373e+256, -1.2570071093295e+172, 1.61857442924537e+91,  6.48276950257797e+124, 4.06502073592256e+223, -3.04154220586479e-212,  -6.81140322236195e+259, NA, 0), sigma = c(7.69262787200791e+163,  -4.02889983150659e-216, -9.60636232986214e+117, 1.34978863106561e-242,  -7.81277360638441e-85, -5.01736013424121e-224, 2.02333972900236e+175,  -1.01423234853766e+281, 5.15775999049178e-250, -5.11741176722233e+147,  -5.86337624573026e+47, -2.08462330077744e-228, -7.7143120231124e+249,  NA, -6.12954945906336e+231, NaN, -5.26661930010239e-269, 1.34265780368332e-306,  -1.39149672948096e+82, -8.60235433556738e+192, NaN, -1.19723613940948e+89,  1.28773737367654e+245, 7.85372846903634e+150, 1.73631140920722e+306,  -8.65449860998845e-287, NA, 2.05755036977285e-140, -1.1944775921535e-76,  -1.90102994340335e-286, 3.01295262061663e+122, -9.73023926501651e-150,  NaN, -8.6492341804159e-287, 61.0104050804684, -5.09814266873736e-114,  -0.0726040638471313, 0.00642278031980532, 1.81829648949133e-202,  0))
result <- do.call(dng:::splitn_mean,testlist)
str(result)