[Rd] .Internal(inspect(x)) gives overly verbose output for reference classes

[Richard Cotton]

Even for an extremely simple instance of a reference class

x <- setRefClass("x")
y <- x$new()

calling the internal inspect function

.Internal(inspect(y))

produces enough output that it takes several minutes to print to the
console.  (Actually I gave up and terminated the command after ~10
mins.  It isn't clear whether the output would eventually complete.)

Are reference classes really so complicated inside, or is this a bug?