Flaky crash with error: expected: IsWellFormed() - possibly GC / memory corruption

[mkustermann]

From the flaky failure in log:

/============================================================================\
| language/deferred/no_such_method_test broke (Pass -> Crash, expected Pass) |
\============================================================================/

--- Command "vm_compile_to_kernel" (took 01.000318s):
set DART_CONFIGURATION=DebugX64 & set DART_SUPPRESS_WER=1 & set DART_CRASHPAD_HANDLER=C:\b\s\w\ir\out\DebugX64\crashpad_handler.exe & C:\b\s\w\ir\pkg\vm\tool\gen_kernel.bat --aot --platform=out/DebugX64/vm_platform_strong.dill -o C:\b\s\w\ir\out\DebugX64\generated_compilations\vm-aot-win-debug-x64\tests_language_deferred_no_such_method_test\out.dill C:\b\s\w\ir\tests\language\deferred\no_such_method_test.dart -Dtest_runner.configuration=vm-aot-win-debug-x64 --packages=C:\b\s\w\ir\.dart_tool\package_config.json -Ddart.vm.product=false --sound-null-safety

exit code:
0

--- Command "precompiler" (took 07.000990s):
set DART_CONFIGURATION=DebugX64 & set DART_SUPPRESS_WER=1 & set DART_CRASHPAD_HANDLER=C:\b\s\w\ir\out\DebugX64\crashpad_handler.exe & out\DebugX64\gen_snapshot --snapshot-kind=app-aot-elf --elf=C:/b/s/w/ir/out/DebugX64/generated_compilations/vm-aot-win-debug-x64/tests_language_deferred_no_such_method_test/out.aotsnapshot --loading-unit-manifest=C:/b/s/w/ir/out/DebugX64/generated_compilations/vm-aot-win-debug-x64/tests_language_deferred_no_such_method_test/ignored.json --sound-null-safety -Dtest_runner.configuration=vm-aot-win-debug-x64 --ignore-unrecognized-flags --packages=C:\b\s\w\ir\.dart_tool\package_config.json C:\b\s\w\ir\out\DebugX64\generated_compilations\vm-aot-win-debug-x64\tests_language_deferred_no_such_method_test\out.dill

exit code:
0

--- Command "remove_kernel_file" (took 20ms):
set DART_CONFIGURATION=DebugX64 & set DART_SUPPRESS_WER=1 & set DART_CRASHPAD_HANDLER=C:\b\s\w\ir\out\DebugX64\crashpad_handler.exe & cmd.exe /c del C:\b\s\w\ir\out\DebugX64\generated_compilations\vm-aot-win-debug-x64\tests_language_deferred_no_such_method_test\out.dill

exit code:
0

--- Command "vm" (took 248ms):
set DART_CONFIGURATION=DebugX64 & set DART_SUPPRESS_WER=1 & set DART_CRASHPAD_HANDLER=C:\b\s\w\ir\out\DebugX64\crashpad_handler.exe & set TEST_COMPILATION_DIR=C:/b/s/w/ir/out/DebugX64/generated_compilations/vm-aot-win-debug-x64/tests_language_deferred_no_such_method_test & out\DebugX64\dartaotruntime.exe --sound-null-safety -Dtest_runner.configuration=vm-aot-win-debug-x64 --ignore-unrecognized-flags --packages=C:\b\s\w\ir\.dart_tool\package_config.json C:/b/s/w/ir/out/DebugX64/generated_compilations/vm-aot-win-debug-x64/tests_language_deferred_no_such_method_test/out.aotsnapshot

exit code:
1073741845

stdout:
unittest-suite-wait-for-done
unittest-suite-success

stderr:
../../runtime/vm/tagged_pointer.h: 103: error: expected: IsWellFormed()
version=3.7.0-edge (main) (Unknown timestamp) on "windows_x64"
pid=7372, thread=1156, isolate_group=vm-service(0000021ECADAE070), isolate=vm-service(0000021ECADB7250)
os=windows, arch=x64, comp=no, sim=no
isolate_instructions=21eca0a7c40, vm_instructions=21eca0a0000
fp=a27e0fdd38, sp=a27e0fdd38, pc=7ff7754b9542
  pc 0x00007ff7754b9542 fp 0x000000a27e0fdd38 Unknown symbol
-- End of DumpStackTrace

--- Re-run this test:
python3 tools/test.py -n vm-aot-win-debug-x64 language/deferred/no_such_method_test


/================================================================================\
| language/deferred/redirecting_factory_test failed again (Crash, expected Pass) |
\================================================================================/

--- Command "vm_compile_to_kernel" (took 01.000169s):
set DART_CONFIGURATION=DebugX64 & set DART_SUPPRESS_WER=1 & set DART_CRASHPAD_HANDLER=C:\b\s\w\ir\out\DebugX64\crashpad_handler.exe & C:\b\s\w\ir\pkg\vm\tool\gen_kernel.bat --aot --platform=out/DebugX64/vm_platform_strong.dill -o C:\b\s\w\ir\out\DebugX64\generated_compilations\vm-aot-win-debug-x64\tests_language_deferred_redirecting_factory_test\out.dill C:\b\s\w\ir\tests\language\deferred\redirecting_factory_test.dart -Dtest_runner.configuration=vm-aot-win-debug-x64 --packages=C:\b\s\w\ir\.dart_tool\package_config.json -Ddart.vm.product=false --sound-null-safety

exit code:
0

--- Command "precompiler" (took 08.000373s):
set DART_CONFIGURATION=DebugX64 & set DART_SUPPRESS_WER=1 & set DART_CRASHPAD_HANDLER=C:\b\s\w\ir\out\DebugX64\crashpad_handler.exe & out\DebugX64\gen_snapshot --snapshot-kind=app-aot-elf --elf=C:/b/s/w/ir/out/DebugX64/generated_compilations/vm-aot-win-debug-x64/tests_language_deferred_redirecting_factory_test/out.aotsnapshot --loading-unit-manifest=C:/b/s/w/ir/out/DebugX64/generated_compilations/vm-aot-win-debug-x64/tests_language_deferred_redirecting_factory_test/ignored.json --sound-null-safety -Dtest_runner.configuration=vm-aot-win-debug-x64 --ignore-unrecognized-flags --packages=C:\b\s\w\ir\.dart_tool\package_config.json C:\b\s\w\ir\out\DebugX64\generated_compilations\vm-aot-win-debug-x64\tests_language_deferred_redirecting_factory_test\out.dill

exit code:
0

--- Command "remove_kernel_file" (took 62ms):
set DART_CONFIGURATION=DebugX64 & set DART_SUPPRESS_WER=1 & set DART_CRASHPAD_HANDLER=C:\b\s\w\ir\out\DebugX64\crashpad_handler.exe & cmd.exe /c del C:\b\s\w\ir\out\DebugX64\generated_compilations\vm-aot-win-debug-x64\tests_language_deferred_redirecting_factory_test\out.dill

exit code:
0

--- Command "vm" (took 273ms):
set DART_CONFIGURATION=DebugX64 & set DART_SUPPRESS_WER=1 & set DART_CRASHPAD_HANDLER=C:\b\s\w\ir\out\DebugX64\crashpad_handler.exe & set TEST_COMPILATION_DIR=C:/b/s/w/ir/out/DebugX64/generated_compilations/vm-aot-win-debug-x64/tests_language_deferred_redirecting_factory_test & out\DebugX64\dartaotruntime.exe --sound-null-safety -Dtest_runner.configuration=vm-aot-win-debug-x64 --ignore-unrecognized-flags --packages=C:\b\s\w\ir\.dart_tool\package_config.json C:/b/s/w/ir/out/DebugX64/generated_compilations/vm-aot-win-debug-x64/tests_language_deferred_redirecting_factory_test/out.aotsnapshot

exit code:
1073741845

stdout:
unittest-suite-wait-for-done

stderr:
Unhandled exception:
Expect.throws fails: Did not throw
#0      Expect._fail (package:expect/expect.dart:887)
#1      Expect.throws (package:expect/expect.dart:772)
#2      test1 (file:///C:/b/s/w/ir/tests/language/deferred/redirecting_factory_test.dart:18)
#3      test (file:///C:/b/s/w/ir/tests/language/deferred/redirecting_factory_test.dart:42)
#4      main (file:///C:/b/s/w/ir/tests/language/deferred/redirecting_factory_test.dart:49)
#5      _delayEntrypointInvocation.<anonymous closure> (dart:isolate-patch/isolate_patch.dart:315)
#6      _RawReceivePort._handleMessage (dart:isolate-patch/isolate_patch.dart:194)
../../runtime/vm/tagged_pointer.h: 103: error: expected: IsWellFormed()
version=3.7.0-edge (main) (Unknown timestamp) on "windows_x64"
pid=9852, thread=13336, isolate_group=vm-service(000002374362F290), isolate=vm-service(000002374363A510)
os=windows, arch=x64, comp=no, sim=no
isolate_instructions=23742927c40, vm_instructions=23742920000
fp=fb0a3fe188, sp=fb0a3fe188, pc=7ff6711f9542
  pc 0x00007ff6711f9542 fp 0x000000fb0a3fe188 Unknown symbol
-- End of DumpStackTrace

--- Re-run this test:
python3 tools/test.py -n vm-aot-win-debug-x64 language/deferred/redirecting_factory_test

/cc @rmacnak-google