Test Loader/classloader/generics/Layout/General/Base01b_seq_ser/Base01b_seq_ser.sh failed with Assert failure(PID 1006 [0x000003ee], Thread: 1006 [0x03ee]): (GetComponentSize() <= 2) || IsArray()

[AriNuer]

Job:
runtime-coreclr gcstress0x3-gcstress0xc:20200308.1

Error message:

Assert failure(PID 1006 [0x000003ee], Thread: 1006 [0x03ee]): (GetComponentSize() <= 2) || IsArray()
File: /__w/18/s/src/coreclr/src/vm/methodtable.cpp Line: 7837
 Image: /root/helix/work/correlation/corerun

/root/helix/work/workitem/Loader/classloader/generics/Layout/General/Base01b_seq_ser/Base01b_seq_ser.sh: line 275: 1006 Aborted $LAUNCHER $ExePath "${CLRTestExecutionArguments[@]}"

Return code: 1
Raw output file: /root/helix/work/workitem/Loader/classloader/Reports/Loader.classloader/generics/Layout/General/Base01b_seq_ser/Base01b_seq_ser.output.txt
Raw output:
BEGIN EXECUTION\n/root/helix/work/correlation/corerun Base01b_seq_ser.dll ''
Writing minidump with heap to file /home/helixbot/dotnetbuild/dumps/coredump.1006.dmp
Written 49307648 bytes (12038 pages) to core file
Expected: 100
Actual: 134
END EXECUTION - FAILED
Test Harness Exitcode is : 1
To run the test:
> set CORE_ROOT=/root/helix/work/correlation
> /root/helix/work/workitem/Loader/classloader/generics/Layout/General/Base01b_seq_ser/Base01b_seq_ser.sh
Expected: True
Actual: False

Stack trace:
at Loader_classloader._generics_Layout_General_Base01b_seq_ser_Base01b_seq_ser_._generics_Layout_General_Base01b_seq_ser_Base01b_seq_ser_sh() in /__w/17/s/artifacts/tests/coreclr/Linux.arm.Checked/TestWrappers/Loader.classloader/Loader.classloader.XUnitWrapper.cs:line 10713
Details:
https://dev.azure.com/dnceng/public/_build/results?buildId=551522&view=ms.vss-test-web.build-test-results-tab&runId=17415558&paneView=debug&resultId=102366

category:correctness
theme:testing
skill-level:expert
cost:medium

[BruceForstall]

@janvorli Can you triage?

[janvorli]

Looks like a GC hole - my guess is that the MethodTable is corrupted.

[AriNuer]

Test Loader/classloader/generics/Layout/General/Base01b_seq_ser/Base01b_seq_ser.sh failed again here runtime-coreclr gcstress0x3-gcstress0xc:20200329.1
Error message:

Assert failure(PID 215 [0x000000d7], Thread: 215 [0x00d7]): !CREATE_CHECK_STRING(pMT && pMT->Validate())
File: /__w/1/s/src/coreclr/src/vm/object.cpp Line: 557
Image: /root/helix/work/correlation/corerun\n\n/root/helix/work/workitem/Loader/classloader/generics/Layout/General/Base01b_seq_ser/Base01b_seq_ser.sh: line 275: 215 Aborted $LAUNCHER $ExePath "${CLRTestExecutionArguments[@]}"
Return code: 1
Raw output file: /root/helix/work/workitem/Loader/classloader/Reports/Loader.classloader/generics/Layout/General/Base01b_seq_ser/Base01b_seq_ser.output.txt\nRaw output:
BEGIN EXECUTION
/root/helix/work/correlation/corerun Base01b_seq_ser.dll ''
Writing minidump with heap to file /home/helixbot/dotnetbuild/dumps/coredump.215.dmp\nWritten 49332224 bytes (12044 pages) to core file
Expected: 100
Actual: 134
END EXECUTION - FAILED
Test Harness Exitcode is : 1
To run the test:
> set CORE_ROOT=/root/helix/work/correlation
> /root/helix/work/workitem/Loader/classloader/generics/Layout/General/Base01b_seq_ser/Base01b_seq_ser.sh
Expected: True
Actual: False

Stack trace:

at Loader_classloader._generics_Layout_General_Base01b_seq_ser_Base01b_seq_ser_._generics_Layout_General_Base01b_seq_ser_Base01b_seq_ser_sh() in /__w/1/s/artifacts/tests/coreclr/Linux.arm.Checked/TestWrappers/Loader.classloader/Loader.classloader.XUnitWrapper.cs:line 10713

Details:
https://dev.azure.com/dnceng/public/_build/results?buildId=578587&view=ms.vss-test-web.build-test-results-tab&runId=18178846&resultId=100875&paneView=debug