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http://tracker.firebirdsql.org/browse/CORE-6015?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Alexander Peshkov reopened CORE-6015:
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> Segfault when using expression index with complex expression
> ------------------------------------------------------------
>
> Key: CORE-6015
> URL: http://tracker.firebirdsql.org/browse/CORE-6015
> Project: Firebird Core
> Issue Type: Bug
> Affects Versions: 2.5.0, 2.5.1, 2.5.2, 2.5.2 Update 1, 2.5.3, 2.1.7, 2.5.3
> Update 1, 2.5.4, 2.5.5, 4.0 Initial, 3.0.0, 2.5.6, 3.0.1, 2.5.7, 3.0.2, 4.0
> Alpha 1, 2.5.8, 3.0.3, 3.0.4, 4.0 Beta 1
> Reporter: Alexander Peshkov
> Assignee: Alexander Peshkov
> Fix For: 4.0 Beta 2, 3.0.5, 2.5.9
>
>
> Nothing limits use of rather complex expression in the index. One can use
> selectable stored procedure to calculate that expression, and in that stored
> procedure one can select rows from the table on which expression index is
> created. During garbage collection of such index key value is calculated
> which causes expression evaluation, execution of SP and tabke scan - which in
> turn causes GC. I.e. we have unlimited recursion with obvious stack overflow
> and segfault.
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