Bugfixes

• [BUGFIX] Fix rare panic that occurred when a querier modified results from ingesters/generators while they were being marshalled to proto. #4790 (@joe-elliott)
  This bug also impacted query correctness on recent trace data by returning incomplete results before they were ready.

Thanks to @pavleec for filing an issue bringing the query correctness element of this bug to our attention as well as testing a fix.