[ssr] assertion -> error message (Fix #8134)
[ssr] assertion -> error message (Fix #8134)

maximedenes/coq,ejgallego/coq,SkySkimmer/coq,Matafou/coq,maximedenes/coq,Zimmi48/coq,coq/coq,JasonGross/coq,Matafou/coq,maximedenes/coq,maximedenes/coq,coq/coq,ejgallego/coq,gares/coq,JasonGross/coq,gares/coq,maximedenes/coq,JasonGross/coq,silene/coq,silene/coq,gares/coq,ejgallego/coq,gares/coq,ppedrot/coq,gares/coq,coq/coq,Zimmi48/coq,coq/coq,ppedrot/coq,SkySkimmer/coq,ppedrot/coq,SkySkimmer/coq,JasonGross/coq,ejgallego/coq,SkySkimmer/coq,ppedrot/coq,silene/coq,ppedrot/coq,Zimmi48/coq,Zimmi48/coq,Matafou/coq