Deadline exceeded errors do not contain stacktrace

[tarobins]

No stack trace shown for dealine exceeded errors.

(version: "3.1.0-dev")

Repro steps

1. checkout timeout branch from https://github.com/tarobins/grpc-dart/tree/timeout
2. start helloworld example server
3. run helloworld example client

Expected result:

Caught error: gRPC Error (code: 4, codeName: DEADLINE_EXCEEDED, message: Deadline exceeded, details: null, rawResponse: null, trailers: {})
Stack trace

That's all folks.
robinsontom-macbookpro1 example/helloworld$ dart bin/client.dart
Caught error: gRPC Error (code: 4, codeName: DEADLINE_EXCEEDED, message: Deadline exceeded, details: null, rawResponse: null, trailers: {})
Stack trace
#0      ClientCall._onTimedOut (package:grpc/src/client/call.dart:303:43)
#1      Timer._createTimer.<anonymous closure> (dart:async-patch/timer_patch.dart:18:15)
#2      _Timer._runTimers (dart:isolate-patch/timer_impl.dart:398:19)
#3      _Timer._handleMessage (dart:isolate-patch/timer_impl.dart:429:5)
#4      _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:192:12)

That's all folks.

Actual result:

Caught error: gRPC Error (code: 4, codeName: DEADLINE_EXCEEDED, message: Deadline exceeded, details: null, rawResponse: null, trailers: {})
Stack trace

That's all folks.