When running a CLI app with DDS from source, I sometimes see this. 
Activity
DanTup commentedon Dec 19, 2023
This is a race and happens because in stackTraceRequest we don't handle exited isolates gracefully.
(And the verbose message with stack is handled in #4899).
DanTup commentedon Dec 19, 2023
Fix at https://dart-review.googlesource.com/c/sdk/+/342585
[dds/dap] Don't throw errors for StackTrace requests on exited Isolates
DanTup commentedon Jan 22, 2024
Fixed by dart-lang/sdk@cd7bf37