Bug #12467
Updated by nobu (Nobuyoshi Nakada) over 8 years ago
Example: ~~~ruby ~~~ spawn 'ruby -e "p Time.now"', [:out, :err] => ['log.txt', 'a'] sleep 1 spawn 'ruby -e "p Time.now"', [:out, :err] => ['log.txt', 'a'] sleep 1 p File.read('log.txt') ~~~ This program looks work correctly at first. ~~~ c:\>ruby spawn_bug.rb "2016-06-07 18:47:25 +0900\n2016-06-07 18:28:17 +0900\n" ~~~ However, when I run it again, the log file is truncated like 'w' flag. ~~~ c:\>ruby spawn_bug.rb "2016-06-07 18:47:38 +0900\n2016-06-07 18:28:17 +0900\n" ~~~ This is the same if I open the log file manually with File.open. ~~~ruby ~~~ f = File.open('log.txt', 'a') spawn 'ruby -e "p Time.now"', [:out, :err] => f sleep 1 spawn 'ruby -e "p Time.now"', [:out, :err] => f sleep 1 p File.read('log.txt') ~~~ I tried this on Windows 10. (Also confirmed this does not happen on Mac OS X 10.11 + ruby 2.2)