packrat::restore(dry.run=TRUE) prints too much on linux

This has crashed my Windows 10 x64 RStudio a couple of times when running a linux R session through the terminal via ssh.

I'm on packrat * 0.4.8-53 2017-12-18 Github (rstudio/packrat@708cd13)

Some sample (unwanted) output from packrat::restore(dry.run=TRUE):

$pkgRecords[[130]]$depends[[24]]$depends[[9]]$depends[[4]]
$pkgRecords[[130]]$depends[[24]]$depends[[9]]$depends[[4]]$name
[1] "rlang"

$pkgRecords[[130]]$depends[[24]]$depends[[9]]$depends[[4]]$source
[1] "CRAN"

$pkgRecords[[130]]$depends[[24]]$depends[[9]]$depends[[4]]$version
[1] "0.1.4"

$pkgRecords[[130]]$depends[[24]]$depends[[9]]$depends[[4]]$hash
[1] "fef2abdadbb8db061b9d37e7ca5cb0b4"

$pkgRecords[[130]]$depends[[24]]$depends[[9]]$depends[[4]]$depends
list()






$pkgRecords[[130]]$depends[[25]]
$pkgRecords[[130]]$depends[[25]]$name
[1] "xml2"

$pkgRecords[[130]]$depends[[25]]$source
[1] "CRAN"

$pkgRecords[[130]]$depends[[25]]$version
[1] "1.1.1"

$pkgRecords[[130]]$depends[[25]]$hash
[1] "b531448e498836e5eafe026e2d355c8b"

$pkgRecords[[130]]$depends[[25]]$depends
$pkgRecords[[130]]$depends[[25]]$depends[[1]]
$pkgRecords[[130]]$depends[[25]]$depends[[1]]$name
[1] "BH"

$pkgRecords[[130]]$depends[[25]]$depends[[1]]$source
[1] "CRAN"

$pkgRecords[[130]]$depends[[25]]$depends[[1]]$version
[1] "1.65.0-1"

$pkgRecords[[130]]$depends[[25]]$depends[[1]]$hash
[1] "95f62be4d6916aae14a310a8b56a6475"

$pkgRecords[[130]]$depends[[25]]$depends[[1]]$depends
list()


$pkgRecords[[130]]$depends[[25]]$depends[[2]]
$pkgRecords[[130]]$depends[[25]]$depends[[2]]$name
[1] "Rcpp"

$pkgRecords[[130]]$depends[[25]]$depends[[2]]$source
[1] "CRAN"

$pkgRecords[[130]]$depends[[25]]$depends[[2]]$version
[1] "0.12.15"

$pkgRecords[[130]]$depends[[25]]$depends[[2]]$hash
[1] "a419463fc86b3ecc7338ae3ac3bbb268"

$pkgRecords[[130]]$depends[[25]]$depends[[2]]$depends
list()

Start by reproducing packrat::restore(dry.run=TRUE) in a Linux R session, using the dependency-structure output shown in the issue as the symptom to investigate. Trace the dry-run output path and determine why the internal package records are printed. Done means the dry run no longer emits that unwanted structure while retaining its intended output.