> On March 3, 2016, 5:55 a.m., Bernd Mathiske wrote:
> > src/tests/slave_recovery_tests.cpp, line 3461
> > <https://reviews.apache.org/r/43629/diff/4/?file=1278087#file1278087line3461>
> >
> >     Why was this moved up here? Couldn't this be in line 3389/3402?
> 
> Joseph Wu wrote:
>     In this case, it's because all injections of `Try<Owned<cluster::Slave>> 
> slave` must be stack-allocated above.  Even though we use `containerizer2` 
> much later, if we put it lower down, it would be deallocated before the 
> second `slave` (and then segfault!).
> 
> Bernd Mathiske wrote:
>     I am not following yet. 
>     
>     1. How could it be deallocated before it has been allocated? How could it 
> even be referenced then? I assume "it" refers to sontainerizer2. 
>     2. The second slave would still be constructed later than containerizer2.

In the updated test, the items go on the stack like this:
```
containerizer1
containerizer2
slave
```

If I don't move `containerizer2` up, the stack will look like this:
```
containerizer1
slave
containerizer2
```
because re-constructing `slave` doesn't change `slave`'s order in the stack.


- Joseph


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On March 2, 2016, 1:45 p.m., Joseph Wu wrote:
> 
> -----------------------------------------------------------
> This is an automatically generated e-mail. To reply, visit:
> https://reviews.apache.org/r/43629/
> -----------------------------------------------------------
> 
> (Updated March 2, 2016, 1:45 p.m.)
> 
> 
> Review request for mesos, Bernd Mathiske and Artem Harutyunyan.
> 
> 
> Bugs: MESOS-4633 and MESOS-4634
>     https://issues.apache.org/jira/browse/MESOS-4633
>     https://issues.apache.org/jira/browse/MESOS-4634
> 
> 
> Repository: mesos
> 
> 
> Description
> -------
> 
> Continuation of https://reviews.apache.org/r/43615/ with a slightly different 
> pattern.
> 
> 
> Diffs
> -----
> 
>   src/tests/fetcher_cache_tests.cpp f9c48f5d938c2601cb8f826029d6969d676ab98e 
>   src/tests/resource_offers_tests.cpp 
> 0bad45dd1dabecc88fef1ab46e8ea26718070b33 
>   src/tests/slave_recovery_tests.cpp bd7b94f3f1fac6705e5bf14c6f6103b540cde56c 
> 
> Diff: https://reviews.apache.org/r/43629/diff/
> 
> 
> Testing
> -------
> 
> Tests are run at the end of this review chain.
> 
> 
> Thanks,
> 
> Joseph Wu
> 
>

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