Bug 17344 - Crash in 4.11 alpha
Summary: Crash in 4.11 alpha
Alias: None
Product: Android
Classification: Xamarin
Component: BCL Class Libraries ()
Version: 4.12.0
Hardware: PC Windows
: High major
Target Milestone: 4.12.0 (KitKat)
Assignee: Jonathan Pryor
Depends on:
Reported: 2014-01-21 05:53 UTC by Grigory (Playtika)
Modified: 2014-02-07 02:07 UTC (History)
4 users (show)

Is this bug a regression?: ---
Last known good build:

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Description Grigory (Playtika) 2014-01-21 05:53:25 UTC
System.InvalidOperationException: The underlying Task is already in one of the three final states: RanToCompletion, Faulted, or Canceled.
  at System.Threading.Tasks.TaskCompletionSource`1[System.Int32].SetException (IEnumerable`1 exceptions) [0x00000] in <filename unknown>:0  (code.cs:1)
  at System.Threading.Tasks.TaskCompletionSource`1[System.Int32].SetException (System.Exception exception) [0x00000] in <filename unknown>:0  (code.cs:1)
  at System.Threading.Tasks.TaskFactory`1[System.Int32].InnerInvoke (System.Threading.Tasks.TaskCompletionSource`1 tcs, System.Func`2 endMethod, IAsyncResult l) [0x00000] in <filename unknown>:0  (code.cs:1)
  at System.Threading.Tasks.TaskFactory`1+<FromAsyncBeginEnd>c__AnonStorey5`3[System.Int32,System.Byte[],System.Int32,System.Int32].<>m__0 (IAsyncResult l) [0x00000] in <filename unknown>:0  (code.cs:1)
  at System.Net.WebAsyncResult.CB (System.Object unused) [0x00000] in <filename unknown>:0  (code.cs:1)

This is a 100% new crash (didn't exist in 4.10.1).
I don't have a repro (should be obvious from last changes in mono i hope).
Comment 1 Jonathan Pryor 2014-01-21 09:23:27 UTC
> should be obvious from last changes in mono i hope

Xamarin.Android 4.10.1 uses Mono commit 433017c0. Xamarin.Android 4.11.0 uses Mono commit 17867123. There are 808 commits between the two.

It won't be obvious. :-)

A repro case is always useful.
Comment 2 Jonathan Pryor 2014-01-21 10:49:47 UTC
mareks tells me that this was _probably_ fixed by: https://github.com/mono/mono/commit/8f1a0ccc
Comment 4 Jonathan Pryor 2014-01-22 15:50:22 UTC
Fixed in monodroid-4.12-series/01786544.

A repro would still be handy so we can verify the fix.
Comment 5 Mohit Kheterpal 2014-02-04 07:40:25 UTC
Today we have tried to verify this issue, but we are not sure about the steps.

Could you please provide some steps or test sample so that we can verify this issue?
Comment 6 PJ 2014-02-04 14:19:37 UTC
Looks like we don't have an exact repro (and neither does the reporter. See:

> I don't have a repro

from comment 0.
Comment 7 narayanp 2014-02-07 02:07:10 UTC
I have checked this issue with following builds:

All Windows
X.S 4.2.3(build 54)
X.Android 4.12.0-22

I am not seeing this issue even I am having some threads in my class and I have debug the application after setting breakpoint.

Hence, closing this issue 

@ Grigory, Please feel free to reopen this issue if you still seeing this issue