[TYPO3-core] RFC #12132: Bug: Scheduler: Check for incomplete objects before using them

[Francois Suter]

Hi,

> Solution:
> Introduce proper tests whenever a task object is unserialized and 
> display errors, throw exceptions or interrupt process as appropriate.

I just found out that errors also happened when trying to remove the 
"broken" task. The attached patch includes a fix for this too.

The idea here is that if a task cannot be unserialized, the 
corresponding database record will be "manually" deleted, instead of 
going through the API (actually the API call does the same thing for 
now, be I can imagine that it could do more in the future, but only with 
a valid task).

Cheers

-- 

Francois Suter
Cobweb Development Sarl - http://www.cobweb.ch
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