Thanks Andrew. Well, the problem is I'm not using regions in any way, and 
it's difficult to understand how they are related to paths and drawing.

On Sunday, August 31, 2014 10:26:34 PM UTC+4, andrew_esh wrote:
>
> I took a look at android::Region::createTJunctionFreeRegion here:
>
>
> http://androidxref.com/4.4.4_r1/xref/frameworks/native/libs/ui/Region.cpp#185
>
> I would look at the region being passed in to there. I wonder if some of 
> the arrows you're rendering are not valid regions by the time they reach 
> this function.
>  
>

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