It's a report from the function science_report_combo_set_active() that tries to set the active tech from the dropdown menu ("combobox"). It happened that id of the tech you have selected somehow was out of the range (likely, there s less than 138 techs in the standard ruleset). If you can reproduce it, file a bug please.
I suspect it to be related to getting the tech one is currently researching by some other means, but 'currently researching' not getting reset (so current research is something that is not available for research any more as it's researched already)