WebKit JSC - JIT Optimization Check Failed in IntegerCheckCombiningPhase::handleBlock Exploit

Exploit for multiple platform in category dos / poc range.mmaxBound range.mmaxBound = data.maddend; range.mmaxOrigin = node-origin.semantic; else if data.maddend origin.semantic; ... The problem is that the check |data.maddend range.mmaxBound| is a signed comparison. PoC: -- function f let arr = ...