Review Request 14098: Fixed slave's finalize() method to not throw segfault.

[Vinod Kone]

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https://reviews.apache.org/r/14098/
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Review request for mesos, Benjamin Hindman and Ben Mahler.


Bugs: MESOS-690
    https://issues.apache.org/jira/browse/MESOS-690


Repository: mesos-git


Description
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Need to copy 'frameworks' when looping through them and shutting them down 
because shutdownFramework() can mutate 'frameworks'.


Diffs
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  src/slave/slave.cpp cefb42004da15d390c276ad5337b558ba5bf8e59 

Diff: https://reviews.apache.org/r/14098/diff/


Testing
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make check

./bin/mesos-tests.sh --gtest_filter="*FaultToleranceTest*" --gtest_repeat=1000 
--gtest_break_on_failure --gtest_shuffle


Thanks,

Vinod Kone