[dev.fuzz] internal/fuzz: only reconstruct inputs when needed on RPC return
If the fuzz RPC finds no error and no new coverage, there's no point
in reconstructing the last value.
If the minimize RPC does not succeed in minimizing, either because the
error can't be reproduced, or new coverage can't be reproduced, or a
new error is found with the input, don't marshal or unmarshal the
input. Just use the original.
Change-Id: I3b0f89b8656a2b36066d82efefac0fff4a61fbee
Reviewed-on: https://go-review.googlesource.com/c/go/+/347233
Trust: Jay Conrod <jayconrod@google.com>
Trust: Katie Hockman <katie@golang.org>
Run-TryBot: Jay Conrod <jayconrod@google.com>
TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: Katie Hockman <katie@golang.org>