[Mono-bugs] [Bug 601772] New: String.Split() can return too many substrings

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http://bugzilla.novell.com/show_bug.cgi?id=601772

http://bugzilla.novell.com/show_bug.cgi?id=601772#c0


           Summary: String.Split() can return too many substrings
    Classification: Mono
           Product: Mono: Class Libraries
           Version: 2.6.x
          Platform: All
        OS/Version: Linux
            Status: NEW
          Severity: Normal
          Priority: P5 - None
         Component: CORLIB
        AssignedTo: mono-bugs at lists.ximian.com
        ReportedBy: Chuck.Esterbrook at gmail.com
         QAContact: mono-bugs at lists.ximian.com
          Found By: ---
           Blocker: ---


User-Agent:       Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_6_3; en-us)
AppleWebKit/531.22.7 (KHTML, like Gecko) Version/4.0.5 Safari/531.22.7

The docs for String.Split say that the 'count' argument is the "The maximum
number of substrings to return."  See
http://msdn.microsoft.com/en-us/library/1bwe3zdy.aspx

But at least one of the overloads of Split will return count+1 substrings. Code
in "Steps to Reproduce"

Reproducible: Always

Steps to Reproduce:
// compile and run this program.
// Bug: String.Split() can return an extra substring in violation of the
'count' parameter value passed to it.
// This program
// ... prints "1" and "True" on .NET 3.5 as expected
// ... prints "2" and "False" on Mono 2.6.3 on Linux (and Mono 2.6.1 on Mac OS
X 10.6)
using System;

namespace TestSplit {
    class Program {
        static void Main(string[] args) {
            var maxSubStrings = 1;
            var r = "aoeuXXasdf".Split(new string[] { "XX" }, maxSubStrings,
StringSplitOptions.None);
            Console.WriteLine(r.Length);
            Console.WriteLine(r.Length == maxSubStrings);
        }
    }
}

Actual Results:  
2
False

Expected Results:  
1
True

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