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There are no flaws in C that cant be fixed by becoming a better programmer.
parse tree drawing https://mstdn.nl/media/SCyrB1bt_XBlLLPNHpY
llvm clang compiler is even easier then gcc to generate caal and control flow graph data and mooigraph https://mstdn.nl/media/nK_2yLgkGtZvew17-mE
now a bit different drawing of #gcc data made with mooigraph program https://mstdn.nl/media/foWIUIG29ugqeUrOlOs
some gcc data visualized https://mstdn.nl/media/sUGH2DHGcBZO8L9sXmY