Fstar_backend.Error
val raise : t -> 'never
val unimplemented :
?issue_id:Hax_engine.Prelude.int ->
?details:Hax_engine.Prelude.string ->
Hax_engine.Ast.span ->
'never
val assertion_failure :
Hax_engine.Ast.span ->
Hax_engine.Prelude.string ->
'never