Your bug report

#24936: 26.0.50; tramp-mode (on FTP): tramp-file-name-for-operation: unknown file I/O primitive: file-name-case-insensitive-p

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 24936@debbugs.gnu.org.

-- 
24936: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=24936
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