This is pdfTeX, Version 3.14159265-2.6-1.40.21 (MiKTeX 20.10) (preloaded format=pdflatex 2020.10.19)  3 NOV 2020 10:25
entering extended mode
**./test_document.tex
(test_document.tex
LaTeX2e <2020-10-01> patch level 1
L3 programming layer <2020-10-05> xparse <2020-03-03>)
! Emergency stop.
<*> ./test_document.tex
                       
*** (job aborted, no legal \end found)

 
Here is how much of TeX's memory you used:
 18 strings out of 480257
 453 string characters out of 2881437
 262535 words of memory out of 3000000
 16656 multiletter control sequences out of 15000+200000
 535088 words of font info for 29 fonts, out of 3000000 for 9000
 1141 hyphenation exceptions out of 8191
 13i,0n,15p,437b,10s stack positions out of 5000i,500n,10000p,200000b,50000s
!  ==> Fatal error occurred, no output PDF file produced!