Readr functions will only throw an error if parsing fails in an unrecoverable way. However, there are lots of potential problems that you might want to know about - these are stored in the problems attribute of the output, which you can easily access with this function.
A locale object tries to capture all the defaults that can vary between countries. You set the locale in once, and the details are automatically passed on down to the columns parsers. The defaults have been chosen to match R (i.e. US English) as closely as possible.
read_delim
(Package: readr) :
Read a delimited file into a data frame.
read_csv and read_tsv are special cases of the general read_delim. They're useful for reading the most common types of flat file data, comma separated values and tab separated values, respectively. read_csv2 uses ; for separators, instead of ,. This is common in European countries which use , as the decimal separator.
This is a fairly standard format for log files - it uses both quotes and square brackets for quoting, and there may be literal quotes embedded in a quoted string. The dash, "-", is used for missing values.
providing 
.