## original code was designed to detect segfaults/hangs from error handling library(lme4) set.seed(101) d <- expand.grid(block = LETTERS[1:26], rep = 1:100) d$x <- runif(nrow(d)) reff_f <- rnorm(length(levels(d$block)),sd=1) ## need intercept large enough to avoid negative values d$eta0 <- 4+3*d$x ## version without random effects d$eta <- d$eta0+reff_f[d$block] ## inverse link d$mu <- 1/d$eta d$y <- rgamma(nrow(d), scale=d$mu/2, shape=2) if (.Platform$OS.type != "windows") { gm0 <- glmer(y ~ 1|block, d, Gamma) gm0.A25 <- glmer(y ~ 1|block, d, Gamma, nAGQ=25L) gm1 <- glmer(y ~ x + (1|block), d, Gamma) gm1.A25 <- glmer(y ~ x + (1|block), d, Gamma, nAGQ=25L) ## strange things happening for logLik ==> AIC, etc for nAGQ ??? anova(gm0, gm1) anova(gm0, gm0.A25) anova(gm1, gm1.A25) summary(gm1) # "fine" summary(gm1.A25) # Inf logLik etc ? }