common/prpc, tools/cmd/cproto: prpc client

common/retry/transient.go

Index: common/retry/transient.go
diff --git a/common/retry/transient.go b/common/retry/transient.go
index c76c8850054329ff7c2e377ef876c72cdf8a123d..ed2a3a01926a70d0f8004c4f3a223b3c602cfcdc 100644
--- a/common/retry/transient.go
+++ b/common/retry/transient.go
@@ -29,7 +29,11 @@ func (i *transientOnlyIterator) Next(ctx context.Context, err error) time.Durati
 // TransientOnly returns an Iterator that wraps another Iterator. It will fall
 // through to the wrapped Iterator if a transient error is encountered;
 // otherwise, it will not retry.
+// Returns nil if f is nil.
 func TransientOnly(f Factory) Factory {
+	if f == nil {
+		return nil
+	}
 	return wrap(f, func(it Iterator) Iterator {
 		return &transientOnlyIterator{it}
 	})