> I ran into an ASSERT in ElementRuleCollector::collectMatchingRules 
> (ASSERT(matchRequest.ruleSet)). When ignored, it seg faults.
> 
> The root cause is that ElementRuleCollector::matchUARules and 
> CSSDefaultStyleSheets::initDefaultStyle disagree about the location of 
> CSSDefaultStyleSheets::defaultStyle.
> Although CSSDefaultStyleSheets::initDefaultStyle has properly created 
> CSSDefaultStyleSheets::defaultStyle, ElementRuleCollector::matchUARules looks 
> in a different location and ends up with a nullptr.
> 
> Adding WEBCORE_EXPORT to the declaration of 
> CSSDefaultStyleSheets::defaultStyle fixes this. Does anyone have any thoughts 
> on why this might be?
> 
> GCC 6.2.1 for arm32v7.

Are you using static build of QtWebKit by chance?

> 
> Thanks,
> 
> Andrew
-- 
Regards,
Konstantin
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