Fix Repr output so that it does not ICE when a self-type is absent. This occurs while printing object type projections for debugging (note that the `UserString` impl is much more careful about this).
Fix Repr output so that it does not ICE when a self-type is
absent. This occurs while printing object type projections for
debugging (note that the `UserString` impl is much more careful about
this).

jroesch/rust,ruud-v-a/rust,KokaKiwi/rust,omasanori/rust,miniupnp/rust,AerialX/rust-rt-minimal,XMPPwocky/rust,philyoon/rust,aneeshusa/rust,hauleth/rust,jroesch/rust,philyoon/rust,zubron/rust,aepsil0n/rust,vhbit/rust,reem/rust,kwantam/rust,AerialX/rust,gifnksm/rust,AerialX/rust,rohitjoshi/rust,vhbit/rust,andars/rust,mdinger/rust,ebfull/rust,defuz/rust,bombless/rust,XMPPwocky/rust,dwillmer/rust,pshc/rust,miniupnp/rust,ejjeong/rust,graydon/rust,aneeshusa/rust,nwin/rust,zaeleus/rust,ejjeong/rust,kwantam/rust,zaeleus/rust,omasanori/rust,carols10cents/rust,rprichard/rust,zubron/rust,pshc/rust,nwin/rust,hauleth/rust,ruud-v-a/rust,mvdnes/rust,GBGamer/rust,kimroen/rust,GBGamer/rust,aepsil0n/rust,carols10cents/rust,robertg/rust,dinfuehr/rust,robertg/rust,zubron/rust,andars/rust,zachwick/rust,pelmers/rust,andars/rust,TheNeikos/rust,GBGamer/rust,mvdnes/rust,AerialX/rust-rt-minimal,aidancully/rust,KokaKiwi/rust,avdi/rust,avdi/rust,krzysz00/rust,zaeleus/rust,mahkoh/rust,seanrivera/rust,ejjeong/rust,bombless/rust,jroesch/rust,omasanori/rust,bombless/rust,mahkoh/rust,ejjeong/rust,nwin/rust,AerialX/rust-rt-minimal,graydon/rust,rprichard/rust,andars/rust,rprichard/rust,miniupnp/rust,zaeleus/rust,dwillmer/rust,zachwick/rust,gifnksm/rust,avdi/rust,rohitjoshi/rust,gifnksm/rust,l0kod/rust,aidancully/rust,vhbit/rust,untitaker/rust,cllns/rust,zachwick/rust,l0kod/rust,jashank/rust,untitaker/rust,KokaKiwi/rust,kwantam/rust,victorvde/rust,dwillmer/rust,vhbit/rust,miniupnp/rust,l0kod/rust,richo/rust,richo/rust,defuz/rust,omasanori/rust,aneeshusa/rust,l0kod/rust,gifnksm/rust,richo/rust,dwillmer/rust,l0kod/rust,untitaker/rust,KokaKiwi/rust,gifnksm/rust,mahkoh/rust,pshc/rust,kimroen/rust,cllns/rust,sae-bom/rust,l0kod/rust,jroesch/rust,jashank/rust,mdinger/rust,dwillmer/rust,ejjeong/rust,XMPPwocky/rust,nwin/rust,kimroen/rust,nwin/rust,reem/rust,ruud-v-a/rust,robertg/rust,cllns/rust,l0kod/rust,bombless/rust,avdi/rust,jashank/rust,rohitjoshi/rust,mihneadb/rust,robertg/rust,defuz/rust,aepsil0n/rust,omasanori/rust,carols10cents/rust,jroesch/rust,philyoon/rust,TheNeikos/rust,andars/rust,zubron/rust,pelmers/rust,mdinger/rust,XMPPwocky/rust,pelmers/rust,philyoon/rust,TheNeikos/rust,aidancully/rust,bombless/rust,AerialX/rust-rt-minimal,AerialX/rust-rt-minimal,dinfuehr/rust,KokaKiwi/rust,dinfuehr/rust,nwin/rust,carols10cents/rust,seanrivera/rust,AerialX/rust,graydon/rust,victorvde/rust,rprichard/rust,mvdnes/rust,untitaker/rust,aepsil0n/rust,jashank/rust,jroesch/rust,XMPPwocky/rust,robertg/rust,untitaker/rust,zubron/rust,miniupnp/rust,pelmers/rust,victorvde/rust,vhbit/rust,seanrivera/rust,aidancully/rust,l0kod/rust,rohitjoshi/rust,kwantam/rust,GBGamer/rust,vhbit/rust,kimroen/rust,krzysz00/rust,graydon/rust,richo/rust,seanrivera/rust,miniupnp/rust,krzysz00/rust,mdinger/rust,pelmers/rust,mahkoh/rust,aneeshusa/rust,vhbit/rust,jashank/rust,kwantam/rust,seanrivera/rust,ebfull/rust,aneeshusa/rust,jroesch/rust,philyoon/rust,TheNeikos/rust,omasanori/rust,defuz/rust,zachwick/rust,pshc/rust,rohitjoshi/rust,krzysz00/rust,reem/rust,zaeleus/rust,carols10cents/rust,rprichard/rust,kimroen/rust,pshc/rust,ebfull/rust,AerialX/rust,robertg/rust,pshc/rust,sae-bom/rust,XMPPwocky/rust,seanrivera/rust,nwin/rust,dwillmer/rust,ebfull/rust,rprichard/rust,mihneadb/rust,sae-bom/rust,zachwick/rust,avdi/rust,hauleth/rust,AerialX/rust,jashank/rust,GBGamer/rust,GBGamer/rust,cllns/rust,AerialX/rust-rt-minimal,TheNeikos/rust,graydon/rust,vhbit/rust,gifnksm/rust,ebfull/rust,reem/rust,kimroen/rust,dwillmer/rust,zachwick/rust,mihneadb/rust,ruud-v-a/rust,zubron/rust,GBGamer/rust,nwin/rust,mdinger/rust,zaeleus/rust,andars/rust,ebfull/rust,hauleth/rust,mihneadb/rust,zubron/rust,sae-bom/rust,bombless/rust,kimroen/rust,victorvde/rust,TheNeikos/rust,reem/rust,ruud-v-a/rust,defuz/rust,philyoon/rust,zubron/rust,mdinger/rust,pelmers/rust,KokaKiwi/rust,jroesch/rust,defuz/rust,cllns/rust,pshc/rust,dinfuehr/rust,krzysz00/rust,mihneadb/rust,jashank/rust,hauleth/rust,victorvde/rust,avdi/rust,mvdnes/rust,aidancully/rust,hauleth/rust,victorvde/rust,richo/rust,cllns/rust,rohitjoshi/rust,aepsil0n/rust,mvdnes/rust,bombless/rust-docs-chinese,sae-bom/rust,dinfuehr/rust,richo/rust,miniupnp/rust,sae-bom/rust,mihneadb/rust,dinfuehr/rust,untitaker/rust,graydon/rust,mahkoh/rust,aidancully/rust,miniupnp/rust,kwantam/rust,reem/rust,aepsil0n/rust,ruud-v-a/rust,GBGamer/rust,carols10cents/rust,krzysz00/rust,mahkoh/rust,pshc/rust,mvdnes/rust,dwillmer/rust,jashank/rust,aneeshusa/rust,ejjeong/rust,AerialX/rust