This is pdfTeX, Version 3.14159265-2.6-1.40.16 (TeX Live 2015/Debian) (preloaded format=pdflatex 2020.4.8)  8 APR 2020 14:54
entering extended mode
 restricted \write18 enabled.
 %&-line parsing enabled.
**uububu

! Emergency stop.
<*> uububu
          
End of file on the terminal!

 
Here is how much of TeX's memory you used:
 4 strings out of 494953
 112 string characters out of 6180978
 45171 words of memory out of 5000000
 3390 multiletter control sequences out of 15000+600000
 3640 words of font info for 14 fonts, out of 8000000 for 9000
 14 hyphenation exceptions out of 8191
 0i,0n,0p,13b,6s stack positions out of 5000i,500n,10000p,200000b,80000s
!  ==> Fatal error occurred, no output PDF file produced!