const internal/types/errors.BadDecl

5 uses

	internal/types/errors (current package)
		code_string.go#L139: 	_ = x[BadDecl-131]
		codes.go#L1263: 	BadDecl

	go/types
		assignments.go#L540: 			check.errorf(lhs, BadDecl, "non-name %s on left side of :=", lhs)
		decl.go#L861: 		check.softErrorf(fdecl.Name, BadDecl, "generic function is missing function body")
		resolver.go#L537: 					check.errorf(arg, BadDecl, "receiver type parameter %s must be an identifier", arg)