In readr, where combine using parameter col_names = TRUE and col_character as below code3, it's failed and the error message as attached image. Anyone can help
systemtime
opa
expansion-tile
react-native-pdf
master-data-management
blueprint
threejs-editor
modelform
random-time-generation
nsundomanager
twitter-card
selenium-ide
nspredicate
qdial
html5-notifications
strong-named-key
prism
pdp-11
xlpagertabstrip
safe-browsing
android-preferences
dos
pybrain
wagtail-admin
sql-server-2005
aptitude
dbcc
getcolor
viola-jones
scrollpane