The cairo png device on R 3.2.1 gives a warning "Application built with libpng-1.5.18 but running with 1.6.17" and then produces a completely blank png image.
if(isTRUE(capabilities()[["cairo"]])){
options(bitmapType = "cairo");
}
png(tmp <- tempfile())
plot(cars)
dev.off()
system2("open", tmp)
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