azure-pipelines-tasks: Exception : Index was out of range. Must be non-negative and less than the size of the collection. on VSTest\2.0.17\TestSelector\TestSelector.exe UpdateTestResults

Hi,

Today I was playing with the ‘Run only impacted tests’ feature of the ‘Run Tests using Visual Studio task’. My test run succeeds, but I get the following error when VSTest\2.0.17\TestSelector\TestSelector.exe UpdateTestResults is executed (see below).

2017-03-07T15:55:38.0425386Z Total tests: 1206. Passed: 1200. Failed: 0. Skipped: 6.
2017-03-07T15:55:38.0425386Z Test Run Successful.
2017-03-07T15:55:38.0425386Z Test execution time: 11.8204 Minutes
2017-03-07T15:55:38.9516587Z Results File: C:\tfsagent\_work\19\s\TestResults\tfsonlinebuild_VTFS-DBS02 2017-03-07 15_44_13.trx
2017-03-07T15:55:39.1116416Z ##[debug]rc:0
2017-03-07T15:55:39.1116416Z ##[debug]success:true
2017-03-07T15:55:39.1116416Z ##[debug]rm -rf C:\Users\TFSONL~1\AppData\Local\Temp\bbaf38b0-034c-11e7-a552-4390675c08db.runsettings
2017-03-07T15:55:39.1116416Z ##[debug]removing file
2017-03-07T15:55:39.1116416Z ##[debug]defaultRoot: 'C:\tfsagent\_work\19\s\TestResults'
2017-03-07T15:55:39.1116416Z ##[debug]findOptions.followSpecifiedSymbolicLink: 'true'
2017-03-07T15:55:39.1195144Z ##[debug]findOptions.followSymbolicLinks: 'true'
2017-03-07T15:55:39.1195144Z ##[debug]matchOptions.debug: 'false'
2017-03-07T15:55:39.1195144Z ##[debug]matchOptions.nobrace: 'true'
2017-03-07T15:55:39.1195144Z ##[debug]matchOptions.noglobstar: 'false'
2017-03-07T15:55:39.1195144Z ##[debug]matchOptions.dot: 'true'
2017-03-07T15:55:39.1195144Z ##[debug]matchOptions.noext: 'false'
2017-03-07T15:55:39.1195144Z ##[debug]matchOptions.nocase: 'true'
2017-03-07T15:55:39.1216417Z ##[debug]matchOptions.nonull: 'false'
2017-03-07T15:55:39.1216417Z ##[debug]matchOptions.matchBase: 'false'
2017-03-07T15:55:39.1216417Z ##[debug]matchOptions.nocomment: 'false'
2017-03-07T15:55:39.1216417Z ##[debug]matchOptions.nonegate: 'false'
2017-03-07T15:55:39.1216417Z ##[debug]matchOptions.flipNegate: 'false'
2017-03-07T15:55:39.1288242Z ##[debug]pattern: 'C:\tfsagent\_work\19\s\TestResults\*.trx'
2017-03-07T15:55:39.1288242Z ##[debug]findPath: 'C:\tfsagent\_work\19\s\TestResults'
2017-03-07T15:55:39.1288242Z ##[debug]statOnly: 'false'
2017-03-07T15:55:39.1288242Z ##[debug]findPath: 'C:\tfsagent\_work\19\s\TestResults'
2017-03-07T15:55:39.1288242Z ##[debug]findOptions.followSpecifiedSymbolicLink: 'true'
2017-03-07T15:55:39.1288242Z ##[debug]findOptions.followSymbolicLinks: 'true'
2017-03-07T15:55:39.1288242Z ##[debug]  C:\tfsagent\_work\19\s\TestResults (directory)
2017-03-07T15:55:39.1316419Z ##[debug]  C:\tfsagent\_work\19\s\TestResults\e8ca5e74-0e5e-4b9a-9669-ae42f540193d (directory)
2017-03-07T15:55:39.1316419Z ##[debug]  C:\tfsagent\_work\19\s\TestResults\e8ca5e74-0e5e-4b9a-9669-ae42f540193d\tfsonlinebuild_VTFS-DBS02 2017-03-07 15_43_51.coverage (file)
2017-03-07T15:55:39.1316419Z ##[debug]  C:\tfsagent\_work\19\s\TestResults\f82cb885-fd7f-461c-a1ec-97ade1afe849 (directory)
2017-03-07T15:55:39.1316419Z ##[debug]  C:\tfsagent\_work\19\s\TestResults\tfsonlinebuild_VTFS-DBS02 2017-03-07 15_44_13 (directory)
2017-03-07T15:55:39.1316419Z ##[debug]  C:\tfsagent\_work\19\s\TestResults\tfsonlinebuild_VTFS-DBS02 2017-03-07 15_44_13\In (directory)
2017-03-07T15:55:39.1384786Z ##[debug]  C:\tfsagent\_work\19\s\TestResults\tfsonlinebuild_VTFS-DBS02 2017-03-07 15_44_13\In\VTFS-DBS02 (directory)
2017-03-07T15:55:39.1384786Z ##[debug]  C:\tfsagent\_work\19\s\TestResults\tfsonlinebuild_VTFS-DBS02 2017-03-07 15_44_13\In\VTFS-DBS02\tfsonlinebuild_VTFS-DBS02 2017-03-07 15_43_51.coverage (file)
2017-03-07T15:55:39.1384786Z ##[debug]  C:\tfsagent\_work\19\s\TestResults\tfsonlinebuild_VTFS-DBS02 2017-03-07 15_44_13.trx (file)
2017-03-07T15:55:39.1384786Z ##[debug]9 results
2017-03-07T15:55:39.1384786Z ##[debug]found 9 paths
2017-03-07T15:55:39.1384786Z ##[debug]applying include pattern
2017-03-07T15:55:39.1384786Z ##[debug]1 matches
2017-03-07T15:55:39.1384786Z ##[debug]1 final results
2017-03-07T15:55:39.1384786Z ##[debug]C:\tfsagent\tasks\VSTest\2.0.17\TestSelector\TestSelector.exe arg: UpdateTestResults
2017-03-07T15:55:39.1384786Z ##[debug]Build.BuildId=22122
2017-03-07T15:55:39.1416422Z ##[debug]System.TeamFoundationCollectionUri=https://xxx.visualstudio.com/
2017-03-07T15:55:39.1416422Z ##[debug]System.TeamProject=MFS
2017-03-07T15:55:39.1416422Z ##[debug]SystemVssConnection auth param AccessToken = ********
2017-03-07T15:55:39.1478419Z ##[debug]exec tool: C:\tfsagent\tasks\VSTest\2.0.17\TestSelector\TestSelector.exe
2017-03-07T15:55:39.1478419Z ##[debug]Arguments:
2017-03-07T15:55:39.1478419Z ##[debug]   UpdateTestResults
2017-03-07T15:55:39.1478419Z [command]C:\tfsagent\tasks\VSTest\2.0.17\TestSelector\TestSelector.exe UpdateTestResults
2017-03-07T15:55:39.1478419Z ##[debug]Deleting the response file C:\Users\TFSONL~1\AppData\Local\Temp\d847ee40-034c-11e7-a552-4390675c08db.txt
2017-03-07T15:55:39.1478419Z ##[debug]rm -rf C:\Users\TFSONL~1\AppData\Local\Temp\d847ee40-034c-11e7-a552-4390675c08db.txt
2017-03-07T15:55:39.1478419Z ##[debug]Deleting the discovered tests file C:\Users\TFSONL~1\AppData\Local\Temp\bd966f40-034c-11e7-a552-4390675c08db.txt
2017-03-07T15:55:39.1478419Z ##[debug]rm -rf C:\Users\TFSONL~1\AppData\Local\Temp\bd966f40-034c-11e7-a552-4390675c08db.txt
2017-03-07T15:55:39.1478419Z ##[debug]removing file
2017-03-07T15:55:39.1478419Z ##[debug]Deleting the baseline build id file C:\Users\TFSONL~1\AppData\Local\Temp\bb56b871-034c-11e7-a552-4390675c08db.txt
2017-03-07T15:55:39.1516430Z ##[debug]rm -rf C:\Users\TFSONL~1\AppData\Local\Temp\bb56b871-034c-11e7-a552-4390675c08db.txt
2017-03-07T15:55:39.1516430Z ##[debug]removing file
2017-03-07T15:55:41.4382356Z PERF: GetTestCaseResults: took 1738.5298 ms
2017-03-07T15:55:41.6221835Z PERF: ReadResultsFromFile: took 173.4023 ms
2017-03-07T15:55:42.2365842Z PERF: UpdateResultsAndSignatures: took 623.0815 ms
2017-03-07T15:55:42.2614184Z Exception : Index was out of range. Must be non-negative and less than the size of the collection.
2017-03-07T15:55:42.2614184Z Parameter name: index
2017-03-07T15:55:42.2614184Z  Stack :    at System.ThrowHelper.ThrowArgumentOutOfRangeException(ExceptionArgument argument, ExceptionResource resource)
2017-03-07T15:55:42.2614184Z    at System.Collections.Generic.List`1.get_Item(Int32 index)
2017-03-07T15:55:42.2614184Z    at Microsoft.TeamFoundation.DistributedTask.Task.TestResults.TestRunPublisher.UpdateResults(TestCaseResultData[] testResults, List`1 tcmTestCaseResults, TestHttpClientBase testImpactClient, Int32 runId, Int32 definitionRunId, DefinitionType definitionType) in D:\v2.0\A1\_work\4\s\DistributedTask\Agent\Task.TestResults\TestRunPublisher.cs:line 152
2017-03-07T15:55:42.2614184Z    at Microsoft.TestFoundation.TestImpact.TestSelector.CommandUpdateTestResults.Run() in D:\v2.0\A1\_work\4\s\Ta\Tasks\TestImpact\TestSelector\Commands\Command\CommandUpdateTestResults.cs:line 133
2017-03-07T15:55:42.2614184Z    at Microsoft.TestFoundation.TestImpact.TestSelector.Program.RunCommand(String commandName, String[] args) in D:\v2.0\A1\_work\4\s\Ta\Tasks\TestImpact\TestSelector\Program.cs:line 41
2017-03-07T15:55:42.2964179Z ##[debug]rc:4294967295
2017-03-07T15:55:42.2964179Z ##[debug]success:false
2017-03-07T15:55:42.2964179Z ##[debug]Test Run Updation failed!
2017-03-07T15:55:42.2964179Z ##[debug]task result: Failed
2017-03-07T15:55:42.3064182Z ##[error]Vstest exited with return code: 1.
2017-03-07T15:55:42.3364192Z ##[debug]Deleting the response file C:\Users\TFSONL~1\AppData\Local\Temp\d847ee40-034c-11e7-a552-4390675c08db.txt
2017-03-07T15:55:42.3364192Z ##[debug]rm -rf C:\Users\TFSONL~1\AppData\Local\Temp\d847ee40-034c-11e7-a552-4390675c08db.txt
2017-03-07T15:55:42.3364192Z ##[debug]Deleting the discovered tests file C:\Users\TFSONL~1\AppData\Local\Temp\bd966f40-034c-11e7-a552-4390675c08db.txt
2017-03-07T15:55:42.3364192Z ##[debug]rm -rf C:\Users\TFSONL~1\AppData\Local\Temp\bd966f40-034c-11e7-a552-4390675c08db.txt
2017-03-07T15:55:42.3364192Z ##[debug]Deleting the baseline build id file C:\Users\TFSONL~1\AppData\Local\Temp\bb56b871-034c-11e7-a552-4390675c08db.txt
2017-03-07T15:55:42.3364192Z ##[debug]rm -rf C:\Users\TFSONL~1\AppData\Local\Temp\bb56b871-034c-11e7-a552-4390675c08db.txt
2017-03-07T15:55:42.3364192Z ##[debug]Deleting the run id fileC:\Users\TFSONL~1\AppData\Local\Temp\bb56b870-034c-11e7-a552-4390675c08db.txt
2017-03-07T15:55:42.3364192Z ##[debug]rm -rf C:\Users\TFSONL~1\AppData\Local\Temp\bb56b870-034c-11e7-a552-4390675c08db.txt
2017-03-07T15:55:42.3364192Z ##[debug]removing file

Am I missing something?