[outerloop] RegexKnownPatternTests.RecreationalRegex_Rectangle either fails with `Specified argument was out of the range of valid values.` or times out

[carlossanlop]

This failure was uncovered in outerloop after fixing an issue that was affecting all runs and hiding other failures: #97135

Error Blob

{
  "ErrorMessage": "",
  "BuildRetry": false,
  "ErrorPattern": "System\\.Text\\.RegularExpressions\\.Tests\\.RegexKnownPatternTests\\.RecreationalRegex_Rectangle.+\\[FAIL\\]",
  "ExcludeConsoleLog": true
}

Reproduction Steps

• Build: https://dev.azure.com/dnceng-public/public/_build/results?buildId=580195

• Queues:

  • windows-x86 Release CoreCLR_Release
  • linux_musl-x64 Debug CoreCLR_Debug

• Job results:

  • https://dev.azure.com/dnceng-public/public/_build/results?buildId=580195&view=logs&j=f40499d6-4b7e-5ceb-7bc4-f4ffbe1e6a93&t=e8f06207-8206-5c50-59c2-723d491e4ea7
  • https://dev.azure.com/dnceng-public/public/_build/results?buildId=580195&view=logs&j=592eed89-78f5-5202-9da5-ad17df3bef4a&t=4feb010c-08b1-5201-8e2c-97e3caf24223

• Log files:

  • https://helixre107v0xdcypoyl9e7f.blob.core.windows.net/dotnet-runtime-refs-pull-97135-merge-5870e0bb584f4731ac/System.Text.RegularExpressions.Tests/1/console.65732426.log?helixlogtype=result
  • https://helixre107v0xdcypoyl9e7f.blob.core.windows.net/dotnet-runtime-refs-pull-97135-merge-6fc0e798b0d84fd99e/System.Text.RegularExpressions.Tests/1/console.ae750688.log?helixlogtype=result

• Output:

===========================================================================================================

C:\h\w\A6E20913\w\AC9E095C\e>"C:\h\w\A6E20913\p\dotnet.exe" exec --runtimeconfig System.Text.RegularExpressions.Tests.runtimeconfig.json --depsfile System.Text.RegularExpressions.Tests.deps.json xunit.console.dll System.Text.RegularExpressions.Tests.dll -xml testResults.xml -nologo -nocolor -trait category=OuterLoop -notrait category=IgnoreForCI -notrait category=failing  
  Discovering: System.Text.RegularExpressions.Tests (method display = ClassAndMethod, method display options = None)
  Discovered:  System.Text.RegularExpressions.Tests (found 26 of 358 test cases)
  Starting:    System.Text.RegularExpressions.Tests (parallel test collections = on [2 threads], stop on fail = off)
    System.Text.RegularExpressions.Tests.RegexKnownPatternTests.RecreationalRegex_Rectangle(engine: Compiled, input: "\r\n1\r\n1\r\n1\r\n\r\n~~~\r\n", expectedMatch: True) [FAIL]
      System.ArgumentOutOfRangeException : Specified argument was out of the range of valid values.
      Stack Trace:
           at Regex505_TryMatchAtCurrentPosition(RegexRunner, ReadOnlySpan`1)
           at Regex505_Scan(RegexRunner, ReadOnlySpan`1)
           at System.Text.RegularExpressions.CompiledRegexRunner.Scan(ReadOnlySpan`1 text)
           at System.Text.RegularExpressions.Regex.RunSingleMatch(RegexRunnerMode mode, Int32 prevlen, String input, Int32 beginning, Int32 length, Int32 startat)
           at System.Text.RegularExpressions.Regex.IsMatch(String input)
           at System.Text.RegularExpressions.Tests.RegexKnownPatternTests.RecreationalRegex_Rectangle(RegexEngine engine, String input, Boolean expectedMatch)
        --- End of stack trace from previous location ---
    System.Text.RegularExpressions.Tests.RegexKnownPatternTests.RecreationalRegex_Rectangle(engine: Compiled, input: "\r\n11\r\n11\r\n\r\n2\r\n2\r\n\r\n~~~\r\n~~~\r\n", expectedMatch: True) [FAIL]
      System.ArgumentOutOfRangeException : Specified argument was out of the range of valid values.
      Stack Trace:
           at Regex506_TryMatchAtCurrentPosition(RegexRunner, ReadOnlySpan`1)
           at Regex506_Scan(RegexRunner, ReadOnlySpan`1)
           at System.Text.RegularExpressions.CompiledRegexRunner.Scan(ReadOnlySpan`1 text)
           at System.Text.RegularExpressions.Regex.RunSingleMatch(RegexRunnerMode mode, Int32 prevlen, String input, Int32 beginning, Int32 length, Int32 startat)
           at System.Text.RegularExpressions.Regex.IsMatch(String input)
           at System.Text.RegularExpressions.Tests.RegexKnownPatternTests.RecreationalRegex_Rectangle(RegexEngine engine, String input, Boolean expectedMatch)
        --- End of stack trace from previous location ---
    System.Text.RegularExpressions.Tests.RegexKnownPatternTests.RecreationalRegex_Rectangle(engine: Compiled, input: "\r\n11\r\n11\r\n\r\n22\r\n\r\n~~~\r\n~~~\r\n", expectedMatch: True) [FAIL]
      System.ArgumentOutOfRangeException : Specified argument was out of the range of valid values.
      Stack Trace:
           at Regex507_TryMatchAtCurrentPosition(RegexRunner, ReadOnlySpan`1)
           at Regex507_Scan(RegexRunner, ReadOnlySpan`1)
           at System.Text.RegularExpressions.CompiledRegexRunner.Scan(ReadOnlySpan`1 text)
           at System.Text.RegularExpressions.Regex.RunSingleMatch(RegexRunnerMode mode, Int32 prevlen, String input, Int32 beginning, Int32 length, Int32 startat)
           at System.Text.RegularExpressions.Regex.IsMatch(String input)
           at System.Text.RegularExpressions.Tests.RegexKnownPatternTests.RecreationalRegex_Rectangle(RegexEngine engine, String input, Boolean expectedMatch)
        --- End of stack trace from previous location ---
    System.Text.RegularExpressions.Tests.RegexKnownPatternTests.RecreationalRegex_Rectangle(engine: Compiled, input: "\r\n11\r\n11\r\n\r\n2222\r\n\r\n33\r\n\r\n4\r\n\r\"���, expectedMatch: True) [FAIL]
      System.ArgumentOutOfRangeException : Specified argument was out of the range of valid values.
      Stack Trace:
           at Regex508_TryMatchAtCurrentPosition(RegexRunner, ReadOnlySpan`1)
           at Regex508_Scan(RegexRunner, ReadOnlySpan`1)
           at System.Text.RegularExpressions.CompiledRegexRunner.Scan(ReadOnlySpan`1 text)
           at System.Text.RegularExpressions.Regex.RunSingleMatch(RegexRunnerMode mode, Int32 prevlen, String input, Int32 beginning, Int32 length, Int32 startat)
           at System.Text.RegularExpressions.Regex.IsMatch(String input)
           at System.Text.RegularExpressions.Tests.RegexKnownPatternTests.RecreationalRegex_Rectangle(RegexEngine engine, String input, Boolean expectedMatch)
        --- End of stack trace from previous location ---
    System.Text.RegularExpressions.Tests.RegexKnownPatternTests.RecreationalRegex_Rectangle(engine: Compiled, input: "\r\n11\r\n11\r\n11\r\n\r\n~~~\r\n~~~\r\n", expectedMatch: True) [FAIL]
      System.ArgumentOutOfRangeException : Specified argument was out of the range of valid values.
      Stack Trace:
           at Regex509_TryMatchAtCurrentPosition(RegexRunner, ReadOnlySpan`1)
           at Regex509_Scan(RegexRunner, ReadOnlySpan`1)
           at System.Text.RegularExpressions.CompiledRegexRunner.Scan(ReadOnlySpan`1 text)
           at System.Text.RegularExpressions.Regex.RunSingleMatch(RegexRunnerMode mode, Int32 prevlen, String input, Int32 beginning, Int32 length, Int32 startat)
           at System.Text.RegularExpressions.Regex.IsMatch(String input)
           at System.Text.RegularExpressions.Tests.RegexKnownPatternTests.RecreationalRegex_Rectangle(RegexEngine engine, String input, Boolean expectedMatch)
        --- End of stack trace from previous location ---
    System.Text.RegularExpressions.Tests.RegexKnownPatternTests.RecreationalRegex_Rectangle(engine: Compiled, input: "\r\n111\r\n\r\n~\r\n~\r\n~\r\n", expectedMatch: True) [FAIL]
      System.ArgumentOutOfRangeException : Specified argument was out of the range of valid values.
      Stack Trace:
           at Regex510_TryMatchAtCurrentPosition(RegexRunner, ReadOnlySpan`1)
           at Regex510_Scan(RegexRunner, ReadOnlySpan`1)
           at System.Text.RegularExpressions.CompiledRegexRunner.Scan(ReadOnlySpan`1 text)
           at System.Text.RegularExpressions.Regex.RunSingleMatch(RegexRunnerMode mode, Int32 prevlen, String input, Int32 beginning, Int32 length, Int32 startat)
           at System.Text.RegularExpressions.Regex.IsMatch(String input)
           at System.Text.RegularExpressions.Tests.RegexKnownPatternTests.RecreationalRegex_Rectangle(RegexEngine engine, String input, Boolean expectedMatch)
        --- End of stack trace from previous location ---
    System.Text.RegularExpressions.Tests.RegexKnownPatternTests.RecreationalRegex_Rectangle(engine: Compiled, input: "\r\n111\r\n\r\n~~~\r\n", expectedMatch: True) [FAIL]
      System.ArgumentOutOfRangeException : Specified argument was out of the range of valid values.
      Stack Trace:
           at Regex511_TryMatchAtCurrentPosition(RegexRunner, ReadOnlySpan`1)
           at Regex511_Scan(RegexRunner, ReadOnlySpan`1)
           at System.Text.RegularExpressions.CompiledRegexRunner.Scan(ReadOnlySpan`1 text)
           at System.Text.RegularExpressions.Regex.RunSingleMatch(RegexRunnerMode mode, Int32 prevlen, String input, Int32 beginning, Int32 length, Int32 startat)
           at System.Text.RegularExpressions.Regex.IsMatch(String input)
           at System.Text.RegularExpressions.Tests.RegexKnownPatternTests.RecreationalRegex_Rectangle(RegexEngine engine, String input, Boolean expectedMatch)
        --- End of stack trace from previous location ---
    System.Text.RegularExpressions.Tests.RegexKnownPatternTests.RecreationalRegex_Rectangle(engine: Compiled, input: "\r\n111\r\n111\r\n\r\n~~~\r\n~~~\r\n", expectedMatch: True) [FAIL]
      System.ArgumentOutOfRangeException : Specified argument was out of the range of valid values.
      Stack Trace:
           at Regex512_TryMatchAtCurrentPosition(RegexRunner, ReadOnlySpan`1)
           at Regex512_Scan(RegexRunner, ReadOnlySpan`1)
           at System.Text.RegularExpressions.CompiledRegexRunner.Scan(ReadOnlySpan`1 text)
           at System.Text.RegularExpressions.Regex.RunSingleMatch(RegexRunnerMode mode, Int32 prevlen, String input, Int32 beginning, Int32 length, Int32 startat)
           at System.Text.RegularExpressions.Regex.IsMatch(String input)
           at System.Text.RegularExpressions.Tests.RegexKnownPatternTests.RecreationalRegex_Rectangle(RegexEngine engine, String input, Boolean expectedMatch)
        --- End of stack trace from previous location ---
    System.Text.RegularExpressions.Tests.RegexMatchTests.StressTestDeepNestingOfLoops [SKIP]
      Condition(s) not met: "Is64BitProcess"
   System.Text.RegularExpressions.Tests: [Long Running Test] 'System.Text.RegularExpressions.Tests.RegexKnownPatternTests.RecreationalRegex_Rectangle', Elapsed: 00:03:18
   System.Text.RegularExpressions.Tests: [Long Running Test] 'System.Text.RegularExpressions.Tests.RegexKnownPatternTests.RecreationalRegex_Rectangle', Elapsed: 00:05:18
   System.Text.RegularExpressions.Tests: [Long Running Test] 'System.Text.RegularExpressions.Tests.RegexKnownPatternTests.RecreationalRegex_Rectangle', Elapsed: 00:07:18
   System.Text.RegularExpressions.Tests: [Long Running Test] 'System.Text.RegularExpressions.Tests.RegexKnownPatternTests.RecreationalRegex_Rectangle', Elapsed: 00:09:18
   System.Text.RegularExpressions.Tests: [Long Running Test] 'System.Text.RegularExpressions.Tests.RegexKnownPatternTests.RecreationalRegex_Rectangle', Elapsed: 00:11:18
   System.Text.RegularExpressions.Tests: [Long Running Test] 'System.Text.RegularExpressions.Tests.RegexKnownPatternTests.RecreationalRegex_Rectangle', Elapsed: 00:13:18
   System.Text.RegularExpressions.Tests: [Long Running Test] 'System.Text.RegularExpressions.Tests.RegexKnownPatternTests.RecreationalRegex_Rectangle', Elapsed: 00:15:18
   System.Text.RegularExpressions.Tests: [Long Running Test] 'System.Text.RegularExpressions.Tests.RegexKnownPatternTests.RecreationalRegex_Rectangle', Elapsed: 00:17:18

Known Issue Error Message

Fill the error message using step by step known issues guidance.

{
  "ErrorMessage": "",
  "ErrorPattern": "",
  "BuildRetry": false,
  "ExcludeConsoleLog": false
}

### Report #### Summary |24-Hour Hit Count|7-Day Hit Count|1-Month Count| |---|---|---| |0|0|0|

Tagging subscribers to this area: @dotnet/area-system-text-regularexpressions
See info in area-owners.md if you want to be subscribed.

Issue Details

---

Error Blob

{
  "ErrorMessage": "",
  "BuildRetry": false,
  "ErrorPattern": "System\.Text\.RegularExpressions\.Tests\.RegexKnownPatternTests\.RecreationalRegex_Rectangle.+\[FAIL\]",
  "ExcludeConsoleLog": true
}

Reproduction Steps

• Build: https://dev.azure.com/dnceng-public/public/_build/results?buildId=580195

• Queue: windows-x86 Release CoreCLR_Release

• Job result: https://dev.azure.com/dnceng-public/public/_build/results?buildId=580195&view=logs&j=f40499d6-4b7e-5ceb-7bc4-f4ffbe1e6a93&t=e8f06207-8206-5c50-59c2-723d491e4ea7

• Log file: https://helixre107v0xdcypoyl9e7f.blob.core.windows.net/dotnet-runtime-refs-pull-97135-merge-5870e0bb584f4731ac/System.Text.RegularExpressions.Tests/1/console.65732426.log?helixlogtype=result

• Output:

===========================================================================================================

C:\h\w\A6E20913\w\AC9E095C\e>"C:\h\w\A6E20913\p\dotnet.exe" exec --runtimeconfig System.Text.RegularExpressions.Tests.runtimeconfig.json --depsfile System.Text.RegularExpressions.Tests.deps.json xunit.console.dll System.Text.RegularExpressions.Tests.dll -xml testResults.xml -nologo -nocolor -trait category=OuterLoop -notrait category=IgnoreForCI -notrait category=failing  
  Discovering: System.Text.RegularExpressions.Tests (method display = ClassAndMethod, method display options = None)
  Discovered:  System.Text.RegularExpressions.Tests (found 26 of 358 test cases)
  Starting:    System.Text.RegularExpressions.Tests (parallel test collections = on [2 threads], stop on fail = off)
    System.Text.RegularExpressions.Tests.RegexKnownPatternTests.RecreationalRegex_Rectangle(engine: Compiled, input: "\r\n1\r\n1\r\n1\r\n\r\n~~~\r\n", expectedMatch: True) [FAIL]
      System.ArgumentOutOfRangeException : Specified argument was out of the range of valid values.
      Stack Trace:
           at Regex505_TryMatchAtCurrentPosition(RegexRunner, ReadOnlySpan`1)
           at Regex505_Scan(RegexRunner, ReadOnlySpan`1)
           at System.Text.RegularExpressions.CompiledRegexRunner.Scan(ReadOnlySpan`1 text)
           at System.Text.RegularExpressions.Regex.RunSingleMatch(RegexRunnerMode mode, Int32 prevlen, String input, Int32 beginning, Int32 length, Int32 startat)
           at System.Text.RegularExpressions.Regex.IsMatch(String input)
           at System.Text.RegularExpressions.Tests.RegexKnownPatternTests.RecreationalRegex_Rectangle(RegexEngine engine, String input, Boolean expectedMatch)
        --- End of stack trace from previous location ---
    System.Text.RegularExpressions.Tests.RegexKnownPatternTests.RecreationalRegex_Rectangle(engine: Compiled, input: "\r\n11\r\n11\r\n\r\n2\r\n2\r\n\r\n~~~\r\n~~~\r\n", expectedMatch: True) [FAIL]
      System.ArgumentOutOfRangeException : Specified argument was out of the range of valid values.
      Stack Trace:
           at Regex506_TryMatchAtCurrentPosition(RegexRunner, ReadOnlySpan`1)
           at Regex506_Scan(RegexRunner, ReadOnlySpan`1)
           at System.Text.RegularExpressions.CompiledRegexRunner.Scan(ReadOnlySpan`1 text)
           at System.Text.RegularExpressions.Regex.RunSingleMatch(RegexRunnerMode mode, Int32 prevlen, String input, Int32 beginning, Int32 length, Int32 startat)
           at System.Text.RegularExpressions.Regex.IsMatch(String input)
           at System.Text.RegularExpressions.Tests.RegexKnownPatternTests.RecreationalRegex_Rectangle(RegexEngine engine, String input, Boolean expectedMatch)
        --- End of stack trace from previous location ---
    System.Text.RegularExpressions.Tests.RegexKnownPatternTests.RecreationalRegex_Rectangle(engine: Compiled, input: "\r\n11\r\n11\r\n\r\n22\r\n\r\n~~~\r\n~~~\r\n", expectedMatch: True) [FAIL]
      System.ArgumentOutOfRangeException : Specified argument was out of the range of valid values.
      Stack Trace:
           at Regex507_TryMatchAtCurrentPosition(RegexRunner, ReadOnlySpan`1)
           at Regex507_Scan(RegexRunner, ReadOnlySpan`1)
           at System.Text.RegularExpressions.CompiledRegexRunner.Scan(ReadOnlySpan`1 text)
           at System.Text.RegularExpressions.Regex.RunSingleMatch(RegexRunnerMode mode, Int32 prevlen, String input, Int32 beginning, Int32 length, Int32 startat)
           at System.Text.RegularExpressions.Regex.IsMatch(String input)
           at System.Text.RegularExpressions.Tests.RegexKnownPatternTests.RecreationalRegex_Rectangle(RegexEngine engine, String input, Boolean expectedMatch)
        --- End of stack trace from previous location ---
    System.Text.RegularExpressions.Tests.RegexKnownPatternTests.RecreationalRegex_Rectangle(engine: Compiled, input: "\r\n11\r\n11\r\n\r\n2222\r\n\r\n33\r\n\r\n4\r\n\r\"���, expectedMatch: True) [FAIL]
      System.ArgumentOutOfRangeException : Specified argument was out of the range of valid values.
      Stack Trace:
           at Regex508_TryMatchAtCurrentPosition(RegexRunner, ReadOnlySpan`1)
           at Regex508_Scan(RegexRunner, ReadOnlySpan`1)
           at System.Text.RegularExpressions.CompiledRegexRunner.Scan(ReadOnlySpan`1 text)
           at System.Text.RegularExpressions.Regex.RunSingleMatch(RegexRunnerMode mode, Int32 prevlen, String input, Int32 beginning, Int32 length, Int32 startat)
           at System.Text.RegularExpressions.Regex.IsMatch(String input)
           at System.Text.RegularExpressions.Tests.RegexKnownPatternTests.RecreationalRegex_Rectangle(RegexEngine engine, String input, Boolean expectedMatch)
        --- End of stack trace from previous location ---
    System.Text.RegularExpressions.Tests.RegexKnownPatternTests.RecreationalRegex_Rectangle(engine: Compiled, input: "\r\n11\r\n11\r\n11\r\n\r\n~~~\r\n~~~\r\n", expectedMatch: True) [FAIL]
      System.ArgumentOutOfRangeException : Specified argument was out of the range of valid values.
      Stack Trace:
           at Regex509_TryMatchAtCurrentPosition(RegexRunner, ReadOnlySpan`1)
           at Regex509_Scan(RegexRunner, ReadOnlySpan`1)
           at System.Text.RegularExpressions.CompiledRegexRunner.Scan(ReadOnlySpan`1 text)
           at System.Text.RegularExpressions.Regex.RunSingleMatch(RegexRunnerMode mode, Int32 prevlen, String input, Int32 beginning, Int32 length, Int32 startat)
           at System.Text.RegularExpressions.Regex.IsMatch(String input)
           at System.Text.RegularExpressions.Tests.RegexKnownPatternTests.RecreationalRegex_Rectangle(RegexEngine engine, String input, Boolean expectedMatch)
        --- End of stack trace from previous location ---
    System.Text.RegularExpressions.Tests.RegexKnownPatternTests.RecreationalRegex_Rectangle(engine: Compiled, input: "\r\n111\r\n\r\n~\r\n~\r\n~\r\n", expectedMatch: True) [FAIL]
      System.ArgumentOutOfRangeException : Specified argument was out of the range of valid values.
      Stack Trace:
           at Regex510_TryMatchAtCurrentPosition(RegexRunner, ReadOnlySpan`1)
           at Regex510_Scan(RegexRunner, ReadOnlySpan`1)
           at System.Text.RegularExpressions.CompiledRegexRunner.Scan(ReadOnlySpan`1 text)
           at System.Text.RegularExpressions.Regex.RunSingleMatch(RegexRunnerMode mode, Int32 prevlen, String input, Int32 beginning, Int32 length, Int32 startat)
           at System.Text.RegularExpressions.Regex.IsMatch(String input)
           at System.Text.RegularExpressions.Tests.RegexKnownPatternTests.RecreationalRegex_Rectangle(RegexEngine engine, String input, Boolean expectedMatch)
        --- End of stack trace from previous location ---
    System.Text.RegularExpressions.Tests.RegexKnownPatternTests.RecreationalRegex_Rectangle(engine: Compiled, input: "\r\n111\r\n\r\n~~~\r\n", expectedMatch: True) [FAIL]
      System.ArgumentOutOfRangeException : Specified argument was out of the range of valid values.
      Stack Trace:
           at Regex511_TryMatchAtCurrentPosition(RegexRunner, ReadOnlySpan`1)
           at Regex511_Scan(RegexRunner, ReadOnlySpan`1)
           at System.Text.RegularExpressions.CompiledRegexRunner.Scan(ReadOnlySpan`1 text)
           at System.Text.RegularExpressions.Regex.RunSingleMatch(RegexRunnerMode mode, Int32 prevlen, String input, Int32 beginning, Int32 length, Int32 startat)
           at System.Text.RegularExpressions.Regex.IsMatch(String input)
           at System.Text.RegularExpressions.Tests.RegexKnownPatternTests.RecreationalRegex_Rectangle(RegexEngine engine, String input, Boolean expectedMatch)
        --- End of stack trace from previous location ---
    System.Text.RegularExpressions.Tests.RegexKnownPatternTests.RecreationalRegex_Rectangle(engine: Compiled, input: "\r\n111\r\n111\r\n\r\n~~~\r\n~~~\r\n", expectedMatch: True) [FAIL]
      System.ArgumentOutOfRangeException : Specified argument was out of the range of valid values.
      Stack Trace:
           at Regex512_TryMatchAtCurrentPosition(RegexRunner, ReadOnlySpan`1)
           at Regex512_Scan(RegexRunner, ReadOnlySpan`1)
           at System.Text.RegularExpressions.CompiledRegexRunner.Scan(ReadOnlySpan`1 text)
           at System.Text.RegularExpressions.Regex.RunSingleMatch(RegexRunnerMode mode, Int32 prevlen, String input, Int32 beginning, Int32 length, Int32 startat)
           at System.Text.RegularExpressions.Regex.IsMatch(String input)
           at System.Text.RegularExpressions.Tests.RegexKnownPatternTests.RecreationalRegex_Rectangle(RegexEngine engine, String input, Boolean expectedMatch)
        --- End of stack trace from previous location ---
    System.Text.RegularExpressions.Tests.RegexMatchTests.StressTestDeepNestingOfLoops [SKIP]
      Condition(s) not met: "Is64BitProcess"
   System.Text.RegularExpressions.Tests: [Long Running Test] 'System.Text.RegularExpressions.Tests.RegexKnownPatternTests.RecreationalRegex_Rectangle', Elapsed: 00:03:18
   System.Text.RegularExpressions.Tests: [Long Running Test] 'System.Text.RegularExpressions.Tests.RegexKnownPatternTests.RecreationalRegex_Rectangle', Elapsed: 00:05:18
   System.Text.RegularExpressions.Tests: [Long Running Test] 'System.Text.RegularExpressions.Tests.RegexKnownPatternTests.RecreationalRegex_Rectangle', Elapsed: 00:07:18
   System.Text.RegularExpressions.Tests: [Long Running Test] 'System.Text.RegularExpressions.Tests.RegexKnownPatternTests.RecreationalRegex_Rectangle', Elapsed: 00:09:18
   System.Text.RegularExpressions.Tests: [Long Running Test] 'System.Text.RegularExpressions.Tests.RegexKnownPatternTests.RecreationalRegex_Rectangle', Elapsed: 00:11:18
   System.Text.RegularExpressions.Tests: [Long Running Test] 'System.Text.RegularExpressions.Tests.RegexKnownPatternTests.RecreationalRegex_Rectangle', Elapsed: 00:13:18
   System.Text.RegularExpressions.Tests: [Long Running Test] 'System.Text.RegularExpressions.Tests.RegexKnownPatternTests.RecreationalRegex_Rectangle', Elapsed: 00:15:18
   System.Text.RegularExpressions.Tests: [Long Running Test] 'System.Text.RegularExpressions.Tests.RegexKnownPatternTests.RecreationalRegex_Rectangle', Elapsed: 00:17:18

Author:	carlossanlop
Assignees:	-
Labels:	arch-x86, area-System.Text.RegularExpressions, os-windows, blocking-clean-ci, runtime-coreclr, Known Build Error
Milestone:	-

[stephentoub]

This failure was uncovered in outerloop after fixing an issue that was affecting all runs and hiding other failures

@carlossanlop, do we know how long that issue has been there, and thus how long this regex issue may have been there but hidden?