This is pdfTeX, Version 3.14159265-2.6-1.40.17 (TeX Live 2016) (preloaded format=pdflatex 2017.5.16)  28 SEP 2018 11:23
entering extended mode
 restricted \write18 enabled.
 %&-line parsing enabled.
**extra_features.tex
(./extra_features.tex
LaTeX2e <2016/03/31>
Babel <3.9r> and hyphenation patterns for 83 language(s) loaded.
! I can't find file `extra_features.aux'.
\enddocument ...keatletter \@@input \jobname .aux 
                                                  \fi \@dofilelist \ifdim \f...
l.4 \end{document}
                  
(Press Enter to retry, or Control-D to exit)
Please type another input file name
! Emergency stop.
\enddocument ...keatletter \@@input \jobname .aux 
                                                  \fi \@dofilelist \ifdim \f...
l.4 \end{document}
                  
*** (job aborted, file error in nonstop mode)

 
Here is how much of TeX's memory you used:
 5 strings out of 493014
 155 string characters out of 6133351
 53601 words of memory out of 5000000
 3648 multiletter control sequences out of 15000+600000
 3640 words of font info for 14 fonts, out of 8000000 for 9000
 1141 hyphenation exceptions out of 8191
 9i,0n,3p,47b,14s stack positions out of 5000i,500n,10000p,200000b,80000s
!  ==> Fatal error occurred, no output PDF file produced!