If popen fails in pipe_read_line we invoke perror for the error message, and pipe_read_line is in turn called by find_other_exec which is used in both frontend and backend code. This is an old codepath, and it seems like it ought to be replaced with the more common logging tools we now have like in the attached diff (which also makes the error translated as opposed to now). Any objections to removing this last perror() call?
-- Daniel Gustafsson
no_perror.diff
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