Merhaba: Trying to build the C++ draft which is Tex source https://github.com/cplusplus/draft
On attempting to build it using `pdflatex std`, the following error is encountered. --- LaTeX Warning: Reference `lex.string' on page 16 undefined on input line 353. LaTeX Warning: Reference `character.seq' on page 16 undefined on input line 362 . ! TeX capacity exceeded, sorry [input stack size=10000]. \@afterendenvhook@ ->\@afterendenvhook@ \input {\jobname .xtr} l.397 \end{bnf} ! ==> Fatal error occurred, no output PDF file produced! Transcript written on std.log. --- Any pointers, how to fix the 'Tex capacity exceeded' error ? warm regards Saifi.