Mono Bionic arm64 CI Failure: System.Diagnostics.Tests.ProcessStartInfoTests, not a valid Base-64 string

[carlossanlop]

First saw this in a release/7.0 backport PR: #76052

Please help determine if a fix needs to get backported to 7.0.

• Queue: Build Linux_bionic arm64 Release AllSubsets_Mono
• Tests: System.Diagnostics.Process.Tests
• Job results: https://dev.azure.com/dnceng-public/public/_build/results?buildId=29620&view=logs&j=30e4a6b3-73be-5b96-c535-0d9023575f9c&t=80b5ca1e-012b-5240-15a1-0677df5434af
• Log file: https://helixre107v0xdeko0k025g8.blob.core.windows.net/dotnet-runtime-refs-pull-76052-merge-e753eaafe08545388c/System.Diagnostics.Process.Tests/1/console.de78222a.log?helixlogtype=result

Callstack

                 Std out:
                   Discovering: System.Diagnostics.Process.Tests (method display = ClassAndMethod, method display options = None)
                   Discovered:  System.Diagnostics.Process.Tests (found 257 of 317 test cases)
                   Starting:    System.Diagnostics.Process.Tests (parallel test collections = on, max threads = 8)
                       System.FormatException : The input is not a valid Base-64 string as it contains a non-base 64 character, more than two padding characters, or an illegal character among the padding characters.
                       Stack Trace:
                         /_/src/libraries/System.Private.CoreLib/src/System/Convert.cs(2906,0): at System.Convert.FromBase64_ComputeResultLength(Char* inputPtr, Int32 inputLength)
                         /_/src/libraries/System.Private.CoreLib/src/System/Convert.cs(2836,0): at System.Convert.FromBase64CharPtr(Char* inputPtr, Int32 inputLength)
                         /_/src/libraries/System.Private.CoreLib/src/System/Convert.cs(2643,0): at System.Convert.FromBase64String(String s)
                         /_/src/libraries/System.Diagnostics.Process/tests/ProcessStartInfoTests.cs(373,0): at System.Diagnostics.Tests.ProcessStartInfoTests.<>c.<ExecuteProcessAndReturnParsedOutput>b__9_0(String s)
                         /_/src/libraries/System.Linq/src/System/Linq/Select.SpeedOpt.cs(83,0): at System.Linq.Enumerable.SelectArrayIterator`2[[System.String, System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[System.String, System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].ToArray()
                         /_/src/libraries/System.Linq/src/System/Linq/ToCollection.cs(17,0): at System.Linq.Enumerable.ToArray[String](IEnumerable`1 source)
                         /_/src/libraries/System.Diagnostics.Process/tests/ProcessStartInfoTests.cs(373,0): at System.Diagnostics.Tests.ProcessStartInfoTests.ExecuteProcessAndReturnParsedOutput(Dictionary`2 envVars, Func`1 processWork)
                         /_/src/libraries/System.Diagnostics.Process/tests/ProcessStartInfoTests.cs(289,0): at System.Diagnostics.Tests.ProcessStartInfoTests.EnvironmentGetEnvironmentVariablesIsCaseSensitive()
                         /_/src/mono/System.Private.CoreLib/src/System/Reflection/MethodInvoker.Mono.cs(33,0): at System.Reflection.MethodInvoker.InterpretedInvoke(Object obj, Span`1 args, BindingFlags invokeAttr)
                       System.FormatException : The input is not a valid Base-64 string as it contains a non-base 64 character, more than two padding characters, or an illegal character among the padding characters.
                       Stack Trace:
                         /_/src/libraries/System.Private.CoreLib/src/System/Convert.cs(2906,0): at System.Convert.FromBase64_ComputeResultLength(Char* inputPtr, Int32 inputLength)
                         /_/src/libraries/System.Private.CoreLib/src/System/Convert.cs(2836,0): at System.Convert.FromBase64CharPtr(Char* inputPtr, Int32 inputLength)
                         /_/src/libraries/System.Private.CoreLib/src/System/Convert.cs(2643,0): at System.Convert.FromBase64String(String s)
                         /_/src/libraries/System.Diagnostics.Process/tests/ProcessStartInfoTests.cs(373,0): at System.Diagnostics.Tests.ProcessStartInfoTests.<>c.<ExecuteProcessAndReturnParsedOutput>b__9_0(String s)
                         /_/src/libraries/System.Linq/src/System/Linq/Select.SpeedOpt.cs(83,0): at System.Linq.Enumerable.SelectArrayIterator`2[[System.String, System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[System.String, System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].ToArray()
                         /_/src/libraries/System.Linq/src/System/Linq/ToCollection.cs(17,0): at System.Linq.Enumerable.ToArray[String](IEnumerable`1 source)
                         /_/src/libraries/System.Diagnostics.Process/tests/ProcessStartInfoTests.cs(373,0): at System.Diagnostics.Tests.ProcessStartInfoTests.ExecuteProcessAndReturnParsedOutput(Dictionary`2 envVars, Func`1 processWork)
                         /_/src/libraries/System.Diagnostics.Process/tests/ProcessStartInfoTests.cs(336,0): at System.Diagnostics.Tests.ProcessStartInfoTests.ProcessStartInfoEnvironmentVariablesDoesNotThrowForCaseSensitiveDuplicates()
                         /_/src/mono/System.Private.CoreLib/src/System/Reflection/MethodInvoker.Mono.cs(33,0): at System.Reflection.MethodInvoker.InterpretedInvoke(Object obj, Span`1 args, BindingFlags invokeAttr)
                       System.FormatException : The input is not a valid Base-64 string as it contains a non-base 64 character, more than two padding characters, or an illegal character among the padding characters.
                       Stack Trace:
                         /_/src/libraries/System.Private.CoreLib/src/System/Convert.cs(2906,0): at System.Convert.FromBase64_ComputeResultLength(Char* inputPtr, Int32 inputLength)
                         /_/src/libraries/System.Private.CoreLib/src/System/Convert.cs(2836,0): at System.Convert.FromBase64CharPtr(Char* inputPtr, Int32 inputLength)
                         /_/src/libraries/System.Private.CoreLib/src/System/Convert.cs(2643,0): at System.Convert.FromBase64String(String s)
                         /_/src/libraries/System.Diagnostics.Process/tests/ProcessStartInfoTests.cs(373,0): at System.Diagnostics.Tests.ProcessStartInfoTests.<>c.<ExecuteProcessAndReturnParsedOutput>b__9_0(String s)
                         /_/src/libraries/System.Linq/src/System/Linq/Select.SpeedOpt.cs(83,0): at System.Linq.Enumerable.SelectArrayIterator`2[[System.String, System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[System.String, System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].ToArray()
                         /_/src/libraries/System.Linq/src/System/Linq/ToCollection.cs(17,0): at System.Linq.Enumerable.ToArray[String](IEnumerable`1 source)
                         /_/src/libraries/System.Diagnostics.Process/tests/ProcessStartInfoTests.cs(373,0): at System.Diagnostics.Tests.ProcessStartInfoTests.ExecuteProcessAndReturnParsedOutput(Dictionary`2 envVars, Func`1 processWork)
                         /_/src/libraries/System.Diagnostics.Process/tests/ProcessStartInfoTests.cs(312,0): at System.Diagnostics.Tests.ProcessStartInfoTests.ProcessStartInfoEnvironmentDoesNotThrowForCaseSensitiveDuplicates()
                         /_/src/mono/System.Private.CoreLib/src/System/Reflection/MethodInvoker.Mono.cs(33,0): at System.Reflection.MethodInvoker.InterpretedInvoke(Object obj, Span`1 args, BindingFlags invokeAttr)

                   Finished:    System.Diagnostics.Process.Tests
                 === TEST EXECUTION SUMMARY ===
                    System.Diagnostics.Process.Tests  Total: 319, Errors: 0, Failed: 3, Skipped: 6, Time: 51.155s
                 
                 
                 Std err:
                     System.Diagnostics.Tests.ProcessStartInfoTests.EnvironmentGetEnvironmentVariablesIsCaseSensitive [FAIL]
                     System.Diagnostics.Tests.ProcessStartInfoTests.ProcessStartInfoEnvironmentVariablesDoesNotThrowForCaseSensitiveDuplicates [FAIL]
                     System.Diagnostics.Tests.ProcessStartInfoTests.ProcessStartInfoEnvironmentDoesNotThrowForCaseSensitiveDuplicates [FAIL]

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Issue Details

---

First saw this in a release/7.0 backport PR: #76052

Please help determine if a fix needs to get backported to 7.0.

• Queue: Build Linux_bionic arm64 Release AllSubsets_Mono
• Tests: System.Diagnostics.Process.Tests
• Job results: https://dev.azure.com/dnceng-public/public/_build/results?buildId=29620&view=logs&j=30e4a6b3-73be-5b96-c535-0d9023575f9c&t=80b5ca1e-012b-5240-15a1-0677df5434af
• Log file: https://helixre107v0xdeko0k025g8.blob.core.windows.net/dotnet-runtime-refs-pull-76052-merge-e753eaafe08545388c/System.Diagnostics.Process.Tests/1/console.de78222a.log?helixlogtype=result

Callstack

                 Std out:
                   Discovering: System.Diagnostics.Process.Tests (method display = ClassAndMethod, method display options = None)
                   Discovered:  System.Diagnostics.Process.Tests (found 257 of 317 test cases)
                   Starting:    System.Diagnostics.Process.Tests (parallel test collections = on, max threads = 8)
                       System.FormatException : The input is not a valid Base-64 string as it contains a non-base 64 character, more than two padding characters, or an illegal character among the padding characters.
                       Stack Trace:
                         /_/src/libraries/System.Private.CoreLib/src/System/Convert.cs(2906,0): at System.Convert.FromBase64_ComputeResultLength(Char* inputPtr, Int32 inputLength)
                         /_/src/libraries/System.Private.CoreLib/src/System/Convert.cs(2836,0): at System.Convert.FromBase64CharPtr(Char* inputPtr, Int32 inputLength)
                         /_/src/libraries/System.Private.CoreLib/src/System/Convert.cs(2643,0): at System.Convert.FromBase64String(String s)
                         /_/src/libraries/System.Diagnostics.Process/tests/ProcessStartInfoTests.cs(373,0): at System.Diagnostics.Tests.ProcessStartInfoTests.<>c.<ExecuteProcessAndReturnParsedOutput>b__9_0(String s)
                         /_/src/libraries/System.Linq/src/System/Linq/Select.SpeedOpt.cs(83,0): at System.Linq.Enumerable.SelectArrayIterator`2[[System.String, System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[System.String, System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].ToArray()
                         /_/src/libraries/System.Linq/src/System/Linq/ToCollection.cs(17,0): at System.Linq.Enumerable.ToArray[String](IEnumerable`1 source)
                         /_/src/libraries/System.Diagnostics.Process/tests/ProcessStartInfoTests.cs(373,0): at System.Diagnostics.Tests.ProcessStartInfoTests.ExecuteProcessAndReturnParsedOutput(Dictionary`2 envVars, Func`1 processWork)
                         /_/src/libraries/System.Diagnostics.Process/tests/ProcessStartInfoTests.cs(289,0): at System.Diagnostics.Tests.ProcessStartInfoTests.EnvironmentGetEnvironmentVariablesIsCaseSensitive()
                         /_/src/mono/System.Private.CoreLib/src/System/Reflection/MethodInvoker.Mono.cs(33,0): at System.Reflection.MethodInvoker.InterpretedInvoke(Object obj, Span`1 args, BindingFlags invokeAttr)
                       System.FormatException : The input is not a valid Base-64 string as it contains a non-base 64 character, more than two padding characters, or an illegal character among the padding characters.
                       Stack Trace:
                         /_/src/libraries/System.Private.CoreLib/src/System/Convert.cs(2906,0): at System.Convert.FromBase64_ComputeResultLength(Char* inputPtr, Int32 inputLength)
                         /_/src/libraries/System.Private.CoreLib/src/System/Convert.cs(2836,0): at System.Convert.FromBase64CharPtr(Char* inputPtr, Int32 inputLength)
                         /_/src/libraries/System.Private.CoreLib/src/System/Convert.cs(2643,0): at System.Convert.FromBase64String(String s)
                         /_/src/libraries/System.Diagnostics.Process/tests/ProcessStartInfoTests.cs(373,0): at System.Diagnostics.Tests.ProcessStartInfoTests.<>c.<ExecuteProcessAndReturnParsedOutput>b__9_0(String s)
                         /_/src/libraries/System.Linq/src/System/Linq/Select.SpeedOpt.cs(83,0): at System.Linq.Enumerable.SelectArrayIterator`2[[System.String, System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[System.String, System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].ToArray()
                         /_/src/libraries/System.Linq/src/System/Linq/ToCollection.cs(17,0): at System.Linq.Enumerable.ToArray[String](IEnumerable`1 source)
                         /_/src/libraries/System.Diagnostics.Process/tests/ProcessStartInfoTests.cs(373,0): at System.Diagnostics.Tests.ProcessStartInfoTests.ExecuteProcessAndReturnParsedOutput(Dictionary`2 envVars, Func`1 processWork)
                         /_/src/libraries/System.Diagnostics.Process/tests/ProcessStartInfoTests.cs(336,0): at System.Diagnostics.Tests.ProcessStartInfoTests.ProcessStartInfoEnvironmentVariablesDoesNotThrowForCaseSensitiveDuplicates()
                         /_/src/mono/System.Private.CoreLib/src/System/Reflection/MethodInvoker.Mono.cs(33,0): at System.Reflection.MethodInvoker.InterpretedInvoke(Object obj, Span`1 args, BindingFlags invokeAttr)
                       System.FormatException : The input is not a valid Base-64 string as it contains a non-base 64 character, more than two padding characters, or an illegal character among the padding characters.
                       Stack Trace:
                         /_/src/libraries/System.Private.CoreLib/src/System/Convert.cs(2906,0): at System.Convert.FromBase64_ComputeResultLength(Char* inputPtr, Int32 inputLength)
                         /_/src/libraries/System.Private.CoreLib/src/System/Convert.cs(2836,0): at System.Convert.FromBase64CharPtr(Char* inputPtr, Int32 inputLength)
                         /_/src/libraries/System.Private.CoreLib/src/System/Convert.cs(2643,0): at System.Convert.FromBase64String(String s)
                         /_/src/libraries/System.Diagnostics.Process/tests/ProcessStartInfoTests.cs(373,0): at System.Diagnostics.Tests.ProcessStartInfoTests.<>c.<ExecuteProcessAndReturnParsedOutput>b__9_0(String s)
                         /_/src/libraries/System.Linq/src/System/Linq/Select.SpeedOpt.cs(83,0): at System.Linq.Enumerable.SelectArrayIterator`2[[System.String, System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[System.String, System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].ToArray()
                         /_/src/libraries/System.Linq/src/System/Linq/ToCollection.cs(17,0): at System.Linq.Enumerable.ToArray[String](IEnumerable`1 source)
                         /_/src/libraries/System.Diagnostics.Process/tests/ProcessStartInfoTests.cs(373,0): at System.Diagnostics.Tests.ProcessStartInfoTests.ExecuteProcessAndReturnParsedOutput(Dictionary`2 envVars, Func`1 processWork)
                         /_/src/libraries/System.Diagnostics.Process/tests/ProcessStartInfoTests.cs(312,0): at System.Diagnostics.Tests.ProcessStartInfoTests.ProcessStartInfoEnvironmentDoesNotThrowForCaseSensitiveDuplicates()
                         /_/src/mono/System.Private.CoreLib/src/System/Reflection/MethodInvoker.Mono.cs(33,0): at System.Reflection.MethodInvoker.InterpretedInvoke(Object obj, Span`1 args, BindingFlags invokeAttr)

                   Finished:    System.Diagnostics.Process.Tests
                 === TEST EXECUTION SUMMARY ===
                    System.Diagnostics.Process.Tests  Total: 319, Errors: 0, Failed: 3, Skipped: 6, Time: 51.155s
                 
                 
                 Std err:
                     System.Diagnostics.Tests.ProcessStartInfoTests.EnvironmentGetEnvironmentVariablesIsCaseSensitive [FAIL]
                     System.Diagnostics.Tests.ProcessStartInfoTests.ProcessStartInfoEnvironmentVariablesDoesNotThrowForCaseSensitiveDuplicates [FAIL]
                     System.Diagnostics.Tests.ProcessStartInfoTests.ProcessStartInfoEnvironmentDoesNotThrowForCaseSensitiveDuplicates [FAIL]

Author:	carlossanlop
Assignees:	-
Labels:	arch-arm64, area-System.Diagnostics.Process, area-CoreLib-mono, test-failure
Milestone:	-