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  1. using System;
  2. using System.Text.RegularExpressions;
  3. using System.IO;
  4. public class Test
  5. {
  6. 	public static void Main()
  7. 	{
  8. 		var s = Regex.Match("\u00018848486", @"\k<1>8848486");
  9. 		if (s.Success) Console.WriteLine(s.Value);
  10. 	}
  11. }
Runtime error #stdin #stdout #stderr 0.01s 34896KB
comments ()
stdin
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Standard input is empty
stdout
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Standard output is empty
stderr
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Unhandled Exception:
System.ArgumentException: parsing '\k<1>8848486' - Reference to undefined group number 1.
  at System.Text.RegularExpressions.RegexParser.ScanBasicBackslash () [0x00000] in <filename unknown>:0 
  at System.Text.RegularExpressions.RegexParser.ScanBackslash () [0x00000] in <filename unknown>:0 
  at System.Text.RegularExpressions.RegexParser.ScanRegex () [0x00000] in <filename unknown>:0 
  at System.Text.RegularExpressions.RegexParser.Parse (System.String re, RegexOptions op) [0x00000] in <filename unknown>:0 
  at System.Text.RegularExpressions.Regex..ctor (System.String pattern, RegexOptions options, TimeSpan matchTimeout, Boolean useCache) [0x00000] in <filename unknown>:0 
  at System.Text.RegularExpressions.Regex.Match (System.String input, System.String pattern, RegexOptions options, TimeSpan matchTimeout) [0x00000] in <filename unknown>:0 
  at System.Text.RegularExpressions.Regex.Match (System.String input, System.String pattern) [0x00000] in <filename unknown>:0 
  at Test.Main () [0x00000] in <filename unknown>:0 
[ERROR] FATAL UNHANDLED EXCEPTION: System.ArgumentException: parsing '\k<1>8848486' - Reference to undefined group number 1.
  at System.Text.RegularExpressions.RegexParser.ScanBasicBackslash () [0x00000] in <filename unknown>:0 
  at System.Text.RegularExpressions.RegexParser.ScanBackslash () [0x00000] in <filename unknown>:0 
  at System.Text.RegularExpressions.RegexParser.ScanRegex () [0x00000] in <filename unknown>:0 
  at System.Text.RegularExpressions.RegexParser.Parse (System.String re, RegexOptions op) [0x00000] in <filename unknown>:0 
  at System.Text.RegularExpressions.Regex..ctor (System.String pattern, RegexOptions options, TimeSpan matchTimeout, Boolean useCache) [0x00000] in <filename unknown>:0 
  at System.Text.RegularExpressions.Regex.Match (System.String input, System.String pattern, RegexOptions options, TimeSpan matchTimeout) [0x00000] in <filename unknown>:0 
  at System.Text.RegularExpressions.Regex.Match (System.String input, System.String pattern) [0x00000] in <filename unknown>:0 
  at Test.Main () [0x00000] in <filename unknown>:0
https://ideone.com/AlVDOX
language:
C# (gmcs 5.20.1)
created:
8 years ago
visibility:
secret

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