This is pdfTeX, Version 3.141592653-2.6-1.40.24 (TeX Live 2022) (preloaded format=pdflatex 2022.8.26) 2 FEB 2023 16:46
entering extended mode
restricted \write18 enabled.
%&-line parsing enabled.
**tests/test.md
(./tests/test.md
LaTeX2e <2021-11-15> patch level 1
L3 programming layer <2022-02-24>
! You can't use `macro parameter character #' in vertical mode.
l.1 #
# Heading 1
?
! Emergency stop.
l.1
End of file on the terminal!
Here is how much of TeX's memory you used:
18 strings out of 479719
390 string characters out of 5880574
285622 words of memory out of 5000000
18115 multiletter control sequences out of 15000+600000
469259 words of font info for 28 fonts, out of 8000000 for 9000
319 hyphenation exceptions out of 8191
13i,0n,12p,57b,10s stack positions out of 10000i,1000n,20000p,200000b,200000s
! ==> Fatal error occurred, no output PDF file produced!