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https://issues.apache.org/jira/browse/LANG-1028?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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stagiaire inria lille dascq closed LANG-1028.
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Resolution: Duplicate
> CLONE - StringUtils.countMatches loops forever if substring empty
> -----------------------------------------------------------------
>
> Key: LANG-1028
> URL: https://issues.apache.org/jira/browse/LANG-1028
> Project: Commons Lang
> Issue Type: Bug
> Components: lang.*
> Environment: Operating System: Linux
> Platform: PC
> Reporter: stagiaire inria lille dascq
>
> If you do say StringUtils.countMatches("x", ""), then it goes into an
> infinite loop.
> Also sub isn't checked for null if str is null also. For instance
> StringUtils.countMatches(null, null) should throw an NPE instead of 0.
> To fix both problems put the following code at the start of the method:
> if (sub.equals("")) {
> return 0;
> }
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