Item919 < Bugs

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Not a bug report, but a test that needs to be done on Dakar.

I just got a bug report that Cairo hangs if you introduce a circular dependency on groups, e.g. group 'a' lists group 'b', group 'b' lists group 'c', and group 'c' lists group 'a'. This puts the apache server to its knees, with hanging http and speedy_cgi processes.

Output of apache's error_log on Cairo:

 Infinite cycle in TWiki group InformationTechnologyGroup 
 Infinite cycle in TWiki group LegalGroup 
 Infinite cycle in TWiki group OneUndisclosedGroup 
 Infinite cycle in TWiki group TwoUndisclosedGroup 
 Infinite cycle in TWiki group ThreeUndisclosedGroup 
 Infinite cycle in TWiki group FourUndisclosedGroup 
 Infinite cycle in TWiki group FiveUndisclosedGroup 
 Infinite cycle in TWiki group SixUndisclosedGroup 
 Infinite cycle in TWiki group SevenUndisclosedGroup 
 Infinite cycle in TWiki group EightUndisclosedGroup 
 Infinite cycle in TWiki group TrainingGroup 
 Infinite cycle in TWiki group NineUndisclosedGroup 
 Infinite cycle in TWiki group TenUndisclosedGroup 
 Infinite cycle in TWiki group ElevenUndisclosedGroup 
 Infinite cycle in TWiki group TwelveUndisclosedGroup 
 Infinite cycle in TWiki group ThirteenUndisclosedGroup 
 Infinite cycle in TWiki group TWikiSuperAdminGroup 
 Infinite cycle in TWiki group TWikiSuperAdminGroup

Could someone test this on Dakar, on a machine where it does not matter that machine goes down?

-- PTh

I had thought I fixed this already, but just checked it and got a (different) error, so I added a unit test and fixed it.

SVN 7415

Excellent smile