[jira] [Updated] (CASSGO-105) Nil pointer dereference in compileMetadata when custom aggregate has no final func defined

["João Reis (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CASSGO-105?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

João Reis updated CASSGO-105:
-----------------------------
     Bug Category: Parent values: Availability(12983)Level 1 values: Process Crash(12992)
       Complexity: Normal
      Component/s: Core
    Discovered By: User Report
    Fix Version/s: 2.1.0
        Reviewers: João Reis
         Severity: Normal
           Status: Open  (was: Triage Needed)

> Nil pointer dereference in compileMetadata when custom aggregate has no final func defined
> ------------------------------------------------------------------------------------------
>
>                 Key: CASSGO-105
>                 URL: https://issues.apache.org/jira/browse/CASSGO-105
>             Project: Apache Cassandra Go driver
>          Issue Type: Bug
>          Components: Core
>            Reporter: Bohdan Siryk
>            Priority: Normal
>             Fix For: 2.1.0
>
>          Time Spent: 20m
>  Remaining Estimate: 0h
>
> A nil pointer dereference occurs when a custom aggregate is defined without a FINALFUNC. Cassandra states that the final func is optional, so Gocql should correctly handle such a case.
> Discovered during the implementation of CASSGO-101.
> The root cause is [this piece of code|https://github.com/apache/cassandra-gocql-driver/blob/f1e31a58f7e0c25e58e2e2a0a0c6de358e643e8b/metadata.go#L362], which tries to get function metadata from the Functions map by finalFunc name. As there is no final function for the created aggregate, _AggregateMetadata.finalFunc_ is an empty string. Trying to get the function metadata from _KeyspaceMetadata.Functions_ map by that empty string value result in a return of a nil value, which is being dereferenced after.



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