https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91858
--- Comment #9 from rguenther at suse dot de <rguenther at suse dot de> --- On Wed, 1 Apr 2020, vincent-gcc at vinc17 dot net wrote: > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91858 > > --- Comment #7 from Vincent Lefèvre <vincent-gcc at vinc17 dot net> --- > (In reply to Richard Biener from comment #6) > > I guess there's only one limb, the rest looks garbage. > > Yes, and 11258999068426240000 with _mpfr_exp = 14 corresponds to 10000 as > expected (11258999068426240000 = 10000*2^50). > > And even when reusing the input > > mpc_init2 (x, 24); > mpc_set_ui_ui (x, 10000, 10000, MPC_RNDNN); > mpc_tan (x, x, 0); > > the program terminates immediately. > > I'm going to look at this more closely with gdb. But I confirm I can see > mpc_tan in the backtrace. It's likely by us doing mpfr_set_emin (-32990); mpfr_set_emax (32766); during startup to work around a similar bug in MPC (IIRC it also was tan ...).
