Your bug report

#12518: outline-minor-mode doesn't work well in C(++) mode

which was filed against the emacs package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 12518@debbugs.gnu.org.

-- 
12518: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=12518
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