Add a runtime exception for an unexpected case.
Add a runtime exception for an unexpected case.

cosmoharrigan/opencog,AmeBel/opencog,Selameab/atomspace,williampma/atomspace,Selameab/atomspace,gavrieltal/opencog,virneo/atomspace,kinoc/opencog,rodsol/atomspace,yantrabuddhi/atomspace,ruiting/opencog,printedheart/opencog,rohit12/opencog,gavrieltal/opencog,gaapt/opencog,rohit12/opencog,virneo/opencog,jlegendary/opencog,virneo/opencog,ceefour/atomspace,ArvinPan/opencog,eddiemonroe/opencog,tim777z/opencog,yantrabuddhi/opencog,Allend575/opencog,williampma/opencog,ruiting/opencog,zhaozengguang/opencog,kim135797531/opencog,UIKit0/atomspace,virneo/atomspace,AmeBel/atomspace,rodsol/opencog,misgeatgit/opencog,prateeksaxena2809/opencog,tim777z/opencog,printedheart/opencog,jswiergo/atomspace,rohit12/atomspace,kim135797531/opencog,prateeksaxena2809/opencog,AmeBel/atomspace,andre-senna/opencog,sanuj/opencog,rodsol/opencog,sumitsourabh/opencog,ruiting/opencog,rohit12/opencog,eddiemonroe/opencog,kim135797531/opencog,rohit12/opencog,shujingke/opencog,gaapt/opencog,anitzkin/opencog,anitzkin/opencog,kim135797531/opencog,printedheart/atomspace,anitzkin/opencog,rodsol/atomspace,AmeBel/opencog,misgeatgit/atomspace,misgeatgit/atomspace,rTreutlein/atomspace,eddiemonroe/atomspace,shujingke/opencog,misgeatgit/opencog,MarcosPividori/atomspace,virneo/opencog,williampma/opencog,kinoc/opencog,inflector/atomspace,anitzkin/opencog,anitzkin/opencog,ceefour/opencog,williampma/opencog,ceefour/opencog,misgeatgit/opencog,iAMr00t/opencog,inflector/opencog,rohit12/atomspace,cosmoharrigan/atomspace,TheNameIsNigel/opencog,printedheart/opencog,jswiergo/atomspace,kinoc/opencog,gavrieltal/opencog,ruiting/opencog,cosmoharrigan/opencog,sanuj/opencog,eddiemonroe/atomspace,AmeBel/atomspace,tim777z/opencog,roselleebarle04/opencog,jlegendary/opencog,printedheart/atomspace,sanuj/opencog,sumitsourabh/opencog,andre-senna/opencog,Allend575/opencog,inflector/opencog,Allend575/opencog,ceefour/atomspace,williampma/atomspace,ArvinPan/opencog,AmeBel/opencog,ceefour/opencog,UIKit0/atomspace,zhaozengguang/opencog,prateeksaxena2809/opencog,roselleebarle04/opencog,sumitsourabh/opencog,shujingke/opencog,Allend575/opencog,roselleebarle04/opencog,andre-senna/opencog,prateeksaxena2809/opencog,rohit12/atomspace,sumitsourabh/opencog,gaapt/opencog,yantrabuddhi/opencog,Selameab/opencog,kim135797531/opencog,andre-senna/opencog,prateeksaxena2809/opencog,cosmoharrigan/opencog,ArvinPan/opencog,andre-senna/opencog,sumitsourabh/opencog,cosmoharrigan/opencog,kinoc/opencog,misgeatgit/opencog,rTreutlein/atomspace,shujingke/opencog,misgeatgit/opencog,ruiting/opencog,jswiergo/atomspace,misgeatgit/atomspace,virneo/opencog,zhaozengguang/opencog,iAMr00t/opencog,Tiggels/opencog,cosmoharrigan/atomspace,misgeatgit/opencog,inflector/opencog,ArvinPan/atomspace,eddiemonroe/atomspace,printedheart/atomspace,inflector/atomspace,rohit12/atomspace,ceefour/atomspace,virneo/atomspace,roselleebarle04/opencog,ceefour/opencog,UIKit0/atomspace,eddiemonroe/opencog,eddiemonroe/opencog,ceefour/opencog,iAMr00t/opencog,misgeatgit/opencog,sumitsourabh/opencog,printedheart/opencog,cosmoharrigan/atomspace,TheNameIsNigel/opencog,AmeBel/opencog,yantrabuddhi/opencog,roselleebarle04/opencog,kinoc/opencog,ceefour/atomspace,ArvinPan/atomspace,inflector/opencog,yantrabuddhi/opencog,inflector/opencog,cosmoharrigan/opencog,Selameab/opencog,Tiggels/opencog,shujingke/opencog,iAMr00t/opencog,williampma/opencog,AmeBel/opencog,AmeBel/atomspace,rTreutlein/atomspace,rodsol/atomspace,williampma/opencog,Selameab/atomspace,yantrabuddhi/opencog,misgeatgit/opencog,roselleebarle04/opencog,williampma/atomspace,MarcosPividori/atomspace,rohit12/opencog,cosmoharrigan/atomspace,inflector/opencog,virneo/opencog,andre-senna/opencog,inflector/opencog,yantrabuddhi/atomspace,yantrabuddhi/opencog,tim777z/opencog,AmeBel/atomspace,inflector/atomspace,Selameab/opencog,sanuj/opencog,eddiemonroe/opencog,yantrabuddhi/atomspace,TheNameIsNigel/opencog,sumitsourabh/opencog,yantrabuddhi/atomspace,printedheart/atomspace,andre-senna/opencog,Allend575/opencog,Selameab/opencog,Tiggels/opencog,Selameab/opencog,anitzkin/opencog,tim777z/opencog,sanuj/opencog,rodsol/opencog,eddiemonroe/atomspace,rTreutlein/atomspace,gavrieltal/opencog,Allend575/opencog,MarcosPividori/atomspace,roselleebarle04/opencog,MarcosPividori/atomspace,inflector/atomspace,Tiggels/opencog,kim135797531/opencog,yantrabuddhi/atomspace,rodsol/opencog,kinoc/opencog,jlegendary/opencog,shujingke/opencog,inflector/atomspace,zhaozengguang/opencog,sanuj/opencog,gaapt/opencog,zhaozengguang/opencog,williampma/opencog,gavrieltal/opencog,eddiemonroe/opencog,yantrabuddhi/opencog,rodsol/opencog,kinoc/opencog,Tiggels/opencog,ceefour/opencog,jlegendary/opencog,ArvinPan/atomspace,ruiting/opencog,misgeatgit/atomspace,jswiergo/atomspace,TheNameIsNigel/opencog,UIKit0/atomspace,prateeksaxena2809/opencog,TheNameIsNigel/opencog,cosmoharrigan/opencog,jlegendary/opencog,ArvinPan/opencog,prateeksaxena2809/opencog,Allend575/opencog,misgeatgit/atomspace,virneo/opencog,zhaozengguang/opencog,anitzkin/opencog,ArvinPan/opencog,williampma/atomspace,rTreutlein/atomspace,kim135797531/opencog,Selameab/opencog,ArvinPan/atomspace,TheNameIsNigel/opencog,virneo/atomspace,shujingke/opencog,jlegendary/opencog,AmeBel/opencog,gaapt/opencog,ArvinPan/opencog,eddiemonroe/opencog,printedheart/opencog,inflector/opencog,Tiggels/opencog,gavrieltal/opencog,jlegendary/opencog,gaapt/opencog,virneo/opencog,Selameab/atomspace,rodsol/atomspace,ceefour/opencog,tim777z/opencog,iAMr00t/opencog,AmeBel/opencog,rohit12/opencog,gaapt/opencog,eddiemonroe/atomspace,printedheart/opencog,rodsol/opencog,iAMr00t/opencog,gavrieltal/opencog,ruiting/opencog,misgeatgit/opencog