Running Fedora Core, tried 3 different versions of Bash. bash-4.3.42-3.fc23.x86_64 bash-4.3.42-5.fc25.x86_64 bash-4.3.43-1.fc25.x86_64
Created a directory with the C equivalent "test\n\t\\ this" typing cd test<tab><tab> gives me a list of a single file test ^I\ this but will not autocomplete. 'ls -l' gives me 'test'$'\n\t''\ this' which i can paste into the bash prompt which correctly changes to the directory. Its possible the autocomplete should do the same thing?
