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https://issues.apache.org/jira/browse/IMPALA-6824?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Lars Volker resolved IMPALA-6824.
---------------------------------
    Resolution: Fixed

> Crash in RuntimeProfile::EventSequence::AddNewerEvents() when events_ is empty
> ------------------------------------------------------------------------------
>
>                 Key: IMPALA-6824
>                 URL: https://issues.apache.org/jira/browse/IMPALA-6824
>             Project: IMPALA
>          Issue Type: Bug
>          Components: Backend
>    Affects Versions: Impala 3.0, Impala 2.12.0
>            Reporter: Lars Volker
>            Assignee: Lars Volker
>            Priority: Blocker
>             Fix For: Impala 3.0, Impala 2.12.0
>
>
> When {{events_}} is empty in runtime-profile-counters.h:347, events_.back() 
> is undefined. This can lead to a crash. The fix is to check for 
> {{events_.empty()}} before calling {{back()}}.



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