Added Area-VM, Triaged labels.

Matthias, it is not clear from this report whether this is even debugging in the VM or whether this is related to Dartium debugging. Can you please do a quick check to verify that the connecting to this kind of code from standalone does properly show all fields?

cc @jacob314.
Set owner to @mhausner.
Added Accepted label.

This comment was originally written by @mhausner

I modified the source a bit to replace type Http with a List:

     1
     2
     3 class MyComponent {
     4 List foo;
     5 MyComponent(this.foo) {
     6 var h = foo;
     7 print(foo.length);
     8 }
     9 }
    10
    11 main() {
    12 var x = new MyComponent(new List());
    13 print(x);
    14 }

Using the standalone debugger, I can break at the print statement in line 7 and list the stack trace.

sbp 7
Set BP 1
r
Breakpoint 1 resolved in isolate 575859754 at file: u.dart lib: 12 token: 26.
Breakpoint 1
    at u.dart:7
7 print(foo.length);
bt
#­0 MyComponent.MyComponent. at file: u.dart lib: 12 token: 26
  this = (obj, id 0) object of type MyComponent
  h = (list, id 1, len 0) []
#­1 main at file: u.dart lib: 12 token: 46
  x = (obj, id 2) null
#­2 isolateStartHandler at file: isolate_patch.dart lib: 8 token: 1277
  ignoreHandler = (closure _startIsolate.ignoreHandler(dynamic) => dynamic file: isolate_patch.dart lib: 8 token: 1100)
  keepAlivePort = (obj, id 4) object of type _RawReceivePortImpl
  isSpawnUri = true
  entryPoint = (closure main() => dynamic file: u.dart lib: 12 token: 37)
  message = (list, id 7, len 3) [null, [...], null]
  replyTo = (obj, id 2) null
  args = (list, id 8, len 1) [""]
  isolateMessage = (obj, id 2) null
#­3 _RawReceivePortImpl@0x2a486688._handleMessage@0x2a486688 at file: isolate_patch.dart lib: 8 token: 603
  port = (obj, id 9) object of type _RawReceivePortImpl
  message = (list, id 7, len 3) [null, [...], null]

inspecting the 'this' pointer in the top frame (object id 0) shows the instance field 'foo' (the equivalent of 'http' in the original code sample):

po 0
  class id: 1207
  foo = (list, id 1, len 0) []

So, the debugger core isn't hiding the instance field. I don't know how the Dartium debugger decides when to inspect an object and display its instance fields.

Removed the owner.
Removed Area-VM label.
Added Area-Dartium, Triaged labels.

This comment was originally written by @zoechi

I deleted my previous comment, this was a misunderstanding. I hat this in the debugger included in DartEditor.

The DartEditor is history. Other debuggers show the expected behavior. Closing the issue.