Running examples in ‘broom.mixed-Ex.R’ failed
The error most likely occurred in:

> base::assign(".ptime", proc.time(), pos = "CheckExEnv")
> ### Name: augment.ranef.mer
> ### Title: Augmentation for random effects (for caterpillar plots etc.)
> ### Aliases: augment.ranef.mer
> 
> ### ** Examples
> 
> if (require("lme4")) {
+    load(system.file("extdata","lme4_example.rda",package="broom.mixed"))
+    rr <- ranef(lmm1,condVar=TRUE)
+    aa <- broom::augment(rr)
+    ## Q-Q plot:
+    if (require(ggplot2) && require(dplyr)) {
+       g0 <- ggplot(aa,aes(estimate,qq,xmin=lb,xmax=ub))+
+           geom_errorbarh(height=0)+
+           geom_point()+facet_wrap(~variable,scale="free_x")
+       ## regular caterpillar plot:
+       g1 <- ggplot(aa,aes(estimate,level,xmin=lb,xmax=ub))+
+          geom_errorbarh(height=0)+
+          geom_vline(xintercept=0,lty=2)+
+          geom_point()+facet_wrap(~variable,scale="free_x")
+       ## emphasize extreme values
+       aa2 <- group_by(aa,grp,level)
+       aa3 <- mutate(aa2, keep=any(estimate/std.error>2))
+       ## Update caterpillar plot with extreme levels highlighted
+       ##  (highlight all groups with *either* extreme intercept *or*
+       ##   extreme slope)
+       ggplot(aa3, aes(estimate,level,xmin=lb,xmax=ub,colour=factor(keep)))+
+          geom_errorbarh(height=0)+
+          geom_vline(xintercept=0,lty=2)+
+          geom_point()+facet_wrap(~variable,scale="free_x")+
+          scale_colour_manual(values=c("black","red"), guide=FALSE)
+    }
+ }
Loading required package: lme4
Loading required package: Matrix
Loading required package: ggplot2
Loading required package: dplyr

Attaching package: ‘dplyr’

The following objects are masked from ‘package:stats’:

    filter, lag

The following objects are masked from ‘package:base’:

    intersect, setdiff, setequal, union

Error in Summary.unit(c(4.4, 4.4), na.rm = FALSE) : 
  VECTOR_ELT() can only be applied to a 'list', not a 'double'
Calls: <Anonymous> ... render_strips -> build_strip -> ggstrip -> Summary.unit
Execution halted