The panic! macro can't be called with a variable declared with "let" when building on stage0. So change the error message to a static const.
The panic! macro can't be called with a variable declared
with "let" when building on stage0. So change the error
message to a static const.

avdi/rust,cllns/rust,zachwick/rust,seanrivera/rust,krzysz00/rust,rohitjoshi/rust,omasanori/rust,mdinger/rust,aepsil0n/rust,reem/rust,omasanori/rust,zachwick/rust,omasanori/rust,aidancully/rust,jroesch/rust,aneeshusa/rust,sae-bom/rust,zachwick/rust,nwin/rust,carols10cents/rust,jashank/rust,jroesch/rust,seanrivera/rust,pelmers/rust,GBGamer/rust,omasanori/rust,l0kod/rust,philyoon/rust,gifnksm/rust,vhbit/rust,dwillmer/rust,victorvde/rust,mvdnes/rust,KokaKiwi/rust,zubron/rust,jashank/rust,zubron/rust,pshc/rust,aidancully/rust,l0kod/rust,omasanori/rust,aepsil0n/rust,nwin/rust,pelmers/rust,gifnksm/rust,mihneadb/rust,rohitjoshi/rust,nwin/rust,graydon/rust,graydon/rust,TheNeikos/rust,graydon/rust,andars/rust,pelmers/rust,carols10cents/rust,victorvde/rust,ruud-v-a/rust,andars/rust,mdinger/rust,kwantam/rust,robertg/rust,XMPPwocky/rust,avdi/rust,andars/rust,rohitjoshi/rust,GBGamer/rust,KokaKiwi/rust,seanrivera/rust,krzysz00/rust,robertg/rust,jroesch/rust,robertg/rust,miniupnp/rust,aneeshusa/rust,aepsil0n/rust,mvdnes/rust,aidancully/rust,pshc/rust,pshc/rust,dwillmer/rust,ejjeong/rust,mdinger/rust,philyoon/rust,seanrivera/rust,krzysz00/rust,philyoon/rust,mvdnes/rust,kwantam/rust,gifnksm/rust,cllns/rust,GBGamer/rust,zubron/rust,TheNeikos/rust,robertg/rust,KokaKiwi/rust,vhbit/rust,rohitjoshi/rust,mvdnes/rust,XMPPwocky/rust,aneeshusa/rust,miniupnp/rust,carols10cents/rust,mdinger/rust,KokaKiwi/rust,vhbit/rust,miniupnp/rust,sae-bom/rust,pelmers/rust,jashank/rust,krzysz00/rust,jashank/rust,carols10cents/rust,carols10cents/rust,graydon/rust,nwin/rust,KokaKiwi/rust,miniupnp/rust,mvdnes/rust,philyoon/rust,dwillmer/rust,krzysz00/rust,mihneadb/rust,aneeshusa/rust,avdi/rust,pelmers/rust,zachwick/rust,mdinger/rust,l0kod/rust,miniupnp/rust,ruud-v-a/rust,philyoon/rust,jroesch/rust,graydon/rust,aidancully/rust,victorvde/rust,vhbit/rust,reem/rust,aneeshusa/rust,ejjeong/rust,cllns/rust,avdi/rust,ruud-v-a/rust,kwantam/rust,jashank/rust,pshc/rust,dwillmer/rust,nwin/rust,zachwick/rust,jroesch/rust,ruud-v-a/rust,carols10cents/rust,nwin/rust,mihneadb/rust,rohitjoshi/rust,zubron/rust,victorvde/rust,XMPPwocky/rust,aidancully/rust,victorvde/rust,aepsil0n/rust,sae-bom/rust,miniupnp/rust,XMPPwocky/rust,victorvde/rust,gifnksm/rust,kwantam/rust,omasanori/rust,miniupnp/rust,ejjeong/rust,seanrivera/rust,dwillmer/rust,mvdnes/rust,robertg/rust,reem/rust,mihneadb/rust,jroesch/rust,avdi/rust,TheNeikos/rust,rohitjoshi/rust,l0kod/rust,andars/rust,XMPPwocky/rust,cllns/rust,aidancully/rust,ruud-v-a/rust,aepsil0n/rust,vhbit/rust,GBGamer/rust,zubron/rust,GBGamer/rust,KokaKiwi/rust,reem/rust,zubron/rust,dwillmer/rust,GBGamer/rust,graydon/rust,pshc/rust,aepsil0n/rust,jashank/rust,gifnksm/rust,ejjeong/rust,pshc/rust,dwillmer/rust,sae-bom/rust,GBGamer/rust,l0kod/rust,mihneadb/rust,cllns/rust,avdi/rust,ruud-v-a/rust,miniupnp/rust,philyoon/rust,zubron/rust,GBGamer/rust,robertg/rust,jashank/rust,pshc/rust,nwin/rust,pelmers/rust,ejjeong/rust,gifnksm/rust,jashank/rust,vhbit/rust,sae-bom/rust,TheNeikos/rust,aneeshusa/rust,jroesch/rust,mdinger/rust,kwantam/rust,vhbit/rust,reem/rust,andars/rust,XMPPwocky/rust,TheNeikos/rust,andars/rust,dwillmer/rust,seanrivera/rust,zubron/rust,pshc/rust,ejjeong/rust,l0kod/rust,cllns/rust,l0kod/rust,jroesch/rust,mihneadb/rust,l0kod/rust,zachwick/rust,sae-bom/rust,krzysz00/rust,nwin/rust,vhbit/rust,kwantam/rust,reem/rust,TheNeikos/rust