added testcase for #1679
added testcase for #1679

nanoant/Nim,haiodo/Nim,jsanjuas/Nim,Matt14916/Nim,msmith491/Nim,haiodo/Nim,dom96/Nim,Dhertz/Nim,haiodo/Nim,russpowers/Nim,greyanubis/Nim,haiodo/Nim,singularperturbation/Nim,Dhertz/Nim,singularperturbation/Nim,mbaulch/Nim,sarvex/Nim-lang,nanoant/Nim,zachaysan/Nim,dom96/Nim,endragor/Nim,singularperturbation/Nim,sarvex/Nim-lang,greyanubis/Nim,zachaysan/Nim,Dhertz/Nim,singularperturbation/Nim,msmith491/Nim,tulayang/Nim,sarvex/Nim-lang,russpowers/Nim,mbaulch/Nim,singularperturbation/Nim,Matt14916/Nim,sarvex/Nim-lang,jsanjuas/Nim,Dhertz/Nim,tmm1/Nim,nanoant/Nim,tmm1/Nim,greyanubis/Nim,mbaulch/Nim,greyanubis/Nim,jfhg/Nim,dom96/Nim,russpowers/Nim,greyanubis/Nim,tmm1/Nim,russpowers/Nim,tulayang/Nim,endragor/Nim,zachaysan/Nim,tulayang/Nim,jsanjuas/Nim,jfhg/Nim,jfhg/Nim,russpowers/Nim,tulayang/Nim,tmm1/Nim,sarvex/Nim-lang,jsanjuas/Nim,mbaulch/Nim,zachaysan/Nim,endragor/Nim,zachaysan/Nim,dom96/Nim,endragor/Nim,tmm1/Nim,tulayang/Nim,tmm1/Nim,nanoant/Nim,russpowers/Nim,jfhg/Nim,sarvex/Nim-lang,msmith491/Nim,Dhertz/Nim,jfhg/Nim,mbaulch/Nim,dom96/Nim,Matt14916/Nim,Matt14916/Nim,jfhg/Nim,endragor/Nim,singularperturbation/Nim,Matt14916/Nim,jfhg/Nim,jsanjuas/Nim,dom96/Nim,msmith491/Nim,haiodo/Nim,Matt14916/Nim,jsanjuas/Nim,singularperturbation/Nim,haiodo/Nim,tmm1/Nim,tulayang/Nim,haiodo/Nim,zachaysan/Nim,nanoant/Nim,greyanubis/Nim,endragor/Nim,jsanjuas/Nim,mbaulch/Nim,mbaulch/Nim,Dhertz/Nim,endragor/Nim,russpowers/Nim,nanoant/Nim,dom96/Nim,msmith491/Nim,greyanubis/Nim,msmith491/Nim,Matt14916/Nim,nanoant/Nim,msmith491/Nim,zachaysan/Nim,sarvex/Nim-lang,Dhertz/Nim