This is pdfTeX, Version 3.14159265-2.6-1.40.20 (MiKTeX 2.9.6960 64-bit) (preloaded format=pdflatex 2019.2.4)  15 FEB 2019 22:10
entering extended mode
**./tikz.tex
(tikz.tex
LaTeX2e <2018-12-01>
)
! Emergency stop.
<*> ./tikz.tex
              
*** (job aborted, no legal \end found)

 
Here is how much of TeX's memory you used:
 14 strings out of 492946
 250 string characters out of 3128061
 61230 words of memory out of 3000000
 4011 multiletter control sequences out of 15000+200000
 3640 words of font info for 14 fonts, out of 3000000 for 9000
 1141 hyphenation exceptions out of 8191
 7i,0n,7p,2873b,8s stack positions out of 5000i,500n,10000p,200000b,50000s
!  ==> Fatal error occurred, no output PDF file produced!