aeb2581f30
Closes https://github.com/dart-lang/sdk/issues/50438 TEST=tests/lib/isolate/handle_error_stacktrace_test, tests/lib/isolate/handle_exiting_to_string_error_test, tests/lib/isolate/handle_throwing_to_string_error_test Change-Id: I098153ecd65360aa724e25fc52e25368ca27ffe7 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/277341 Reviewed-by: Alexander Aprelev <aam@google.com> Reviewed-by: Derek Xu <derekx@google.com>