ffi/isolate_local_function_callbacks_test failures on vm-dyn-mac-debug-simarm64_arm64

[brianquinlan]

ffi/isolate_local_function_callbacks_test/7 RuntimeError (expected Pass)

are failing on configurations

vm-dyn-mac-debug-simarm64_arm64

The two (seemingly unrelated) commits since the previous run are:
333587b
be380ca

The traceback (message is coming from here):

--- Command "vm" (took 09.000812s):
DART_CONFIGURATION=DebugSIMARM64_ARM64 xcodebuild/DebugSIMARM64_ARM64/dart --profiler --profile_vm=false --use_simulator=true -Dtest_runner.configuration=vm-dyn-mac-debug-simarm64_arm64 --interpreter --ignore-unrecognized-flags --packages=/Volumes/Work/s/w/ir/cache/builder/sdk/.dart_tool/package_config.json /Volumes/Work/s/w/ir/cache/builder/sdk/tests/ffi/isolate_local_function_callbacks_test.dart

exit code:
255

stderr:
Unhandled exception:
This function should be handled on call site.
#0      _nativeCallbackFunction (dart:ffi-patch/ffi_patch.dart)
#1      testNativeCallableStatic (file:///Volumes/Work/s/w/ir/cache/builder/sdk/tests/ffi/isolate_local_function_callbacks_test.dart)
#2      main (file:///Volumes/Work/s/w/ir/cache/builder/sdk/tests/ffi/isolate_local_function_callbacks_test.dart:26:3)
#3      _delayEntrypointInvocation.<anonymous closure> (dart:isolate-patch/isolate_patch.dart:310:33)
#4      _RawReceivePort._handleMessage (dart:isolate-patch/isolate_patch.dart:193:12)

--- Re-run this test:
python3 tools/test.py -n vm-dyn-mac-debug-simarm64_arm64 ffi/isolate_local_function_callbacks_test/7