V3057. Function receives an odd argument.

The analyzer detected a possible error that has to do with passing a suspicious value as an argument to a function.

Consider the following examples:

Invalid characters in a path

string GetLogPath(string root)
{
  return System.IO.Path.Combine(root, @"\my|folder\log.txt");
}

A path containing invalid character '|' is passed to function 'Combine()'. It will result in an 'ArgumentException'.

The fixed version:

string GetLogPath(string root)
{
  return System.IO.Path.Combine(root, @"\my\folder\log.txt"); 
}

Invalid index

var pos = mask.IndexOf('\0');
if (pos != 0)
    asciiname = mask.Substring(0, pos);

'IndexOf()' returns the position of a specified argument. If the argument is not found, the function returns the value '-1'. And passing a negative index to function 'Substring()' results in an 'ArgumentOutOfRangeException'.

The fixed version:

var pos = mask.IndexOf('\0');
if (pos > 0)
    asciiname = mask.Substring(0, pos);

Suspicious argument to format function

string.Format(mask, 1, 2, mask);

The 'string.Format()' function replaces one or more format items in a specified string. An attempt to write the same string into the format string is treated as suspicious by the analyzer.

This diagnostic is classified as:

You can look at examples of errors detected by the V3057 diagnostic.


Bugs Found

Checked Projects
411
Collected Errors
14 123
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