From the code...
static inline void force_dump(void)
fprintf(stderr, "\n\033[1m%s\033[0m\n", "Forcing core dump");
which is called like:
fprintf(stderr, " realloc1: usage count is %d: %p @ %s:%d (allocated %s:%d)\n", cnt, p, file, line, ah->file, ah->line);
void int_error(char *m, ...)
sprintf(errbuf, "\033[1mINTERNAL ERROR\033[0m at %s:%d: ", errfile, errline);
er(1, errbuf, l);
and 4ish other flavours of handling
so the lines JUST PRECEDING the call to the dump dumper should give the ACTUALLY helpful error message content...
In fact as a general rule just quoting a tiny part of some error without sharing the right parts of it is actually less than useless. It makes the job harder. as you probably know often one error message can be cascaded as a result of previous errors...
(or similar - pick your right version) would appear to be good place to look for error handling methodologies within the application.
Hope it helps... FWIW sharing your work "so far" is never a terrible idea if you get stuck.