title: Suppress reader parse problems in r
body: <p>I am currently reading in a file using the package <code>readr</code>. The idea is to use <code>read_delim</code> to read in row for row to find the maximum columns in my unstructured data file. The code outputs that there are <code>parsing</code> problems. I know of these and will deal with column type after import. Is there a way to turn off the <code>problems()</code> as the usual <code>options(warn)</code> is not working</p>
  
  <pre><code>i=1
  max_col &lt;- 0
  options(warn = -1)
  while(i != "stop")
  {
    n_col&lt;- ncol(read_delim("file.txt", n_max = 1, skip = i, delim="\t"))
    if(n_col &gt; max_col) {
      max_col &lt;- n_col
      print(max_col)
    }
    i &lt;- i+1
    if(n_col==0) i&lt;-"stop"
  }
  options(warn = 0) 
  </code></pre>
  
  <p>The output to console that I am trying to suppress is the following:</p>
  
  <pre><code>.See problems(...) for more details.
  Warning: 11 parsing failures.
  row      col   expected  actual
    1 1####4 valid date 1###8
  </code></pre>