https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68589
--- Comment #3 from David Bacon <bacon at cs dot nyu.edu> --- A workaround for this gcc bug is to replace the offending 1e37 (the only one in the .i file) with 10000000000000000000000000000000000000.1 (1{37 zeroes}.1). That works in the 5.2.0 case, anyway. It is worth noting also that the segfault occurred with every pure positive power of 10 that I tried (quite a few): the .1 matters, if not to the floating-point value realized. dB