Reference count seems to be off

[gaborcsardi]

x <- c(1,2,2.5)
.Internal(inspect(x))
#> @110f22ba8 14 REALSXP g0c3 [REF(1)] (len=3, tl=0) 1,2,2.5

lobstr::sxp(x)
#> [1:0x110f22ba8] <REALSXP[3]> (named:3)