Fix broken remove loops for indexers + add warning about invalid index keys on retrieval
Fix broken remove loops for indexers + add warning about invalid index keys on retrieval

jhftrifork/Eve,dirvine/Eve,steveklabnik/Eve,fineline/Eve,ViniciusAtaide/Eve,bluesnowman/Eve,shamim8888/Eve,shamim8888/Eve,brunotag/Eve,dirvine/Eve,steveklabnik/Eve,justintaft/Eve,shaunstanislaus/Eve-1,Drooids/Eve,jhftrifork/Eve,fineline/Eve,rschroll/Eve,hrishimittal/Eve,shaunstanislaus/Eve-1,adjohnson916/Eve,nonZero/Eve,shaunstanislaus/Eve-1,ViniciusAtaide/Eve,jhftrifork/Eve,Drooids/Eve,rschroll/Eve,tobyjsullivan/Eve,shamim8888/Eve,tobyjsullivan/Eve,brunotag/Eve,pel-daniel/Eve,fineline/Eve,adjohnson916/Eve,sherbondy/Eve,rschroll/Eve,8l/Eve,sagittaros/Eve,shamim8888/Eve,8l/Eve,sherbondy/Eve,8l/Eve,sagittaros/Eve,nonZero/Eve,tobyjsullivan/Eve,steveklabnik/Eve,bluesnowman/Eve,Drooids/Eve,dirvine/Eve,sherbondy/Eve,steveklabnik/Eve,hrishimittal/Eve,hrishimittal/Eve,sagittaros/Eve,fineline/Eve,pel-daniel/Eve,justintaft/Eve,bjtitus/Eve,ViniciusAtaide/Eve,adjohnson916/Eve,nonZero/Eve,sagittaros/Eve,jhftrifork/Eve,bjtitus/Eve,shamim8888/Eve,kidaa/Eve-1,shaunstanislaus/Eve-1,dirvine/Eve,8l/Eve,bluesnowman/Eve,brunotag/Eve,rschroll/Eve,kidaa/Eve-1,justintaft/Eve,agumonkey/Eve,pel-daniel/Eve,kidaa/Eve-1,bjtitus/Eve,nonZero/Eve,hrishimittal/Eve,fineline/Eve,kidaa/Eve-1,agumonkey/Eve,sagittaros/Eve,bjtitus/Eve,steveklabnik/Eve,agumonkey/Eve,shaunstanislaus/Eve-1,dirvine/Eve,adjohnson916/Eve,agumonkey/Eve,rschroll/Eve,bluesnowman/Eve,tobyjsullivan/Eve,8l/Eve,sherbondy/Eve,pel-daniel/Eve,brunotag/Eve,ViniciusAtaide/Eve,hrishimittal/Eve,justintaft/Eve,sherbondy/Eve,jhftrifork/Eve,brunotag/Eve,ViniciusAtaide/Eve,Drooids/Eve,Drooids/Eve,adjohnson916/Eve,tobyjsullivan/Eve,nonZero/Eve,agumonkey/Eve