This is because the precision is set to 1 in libmpfr 4.0.0 (in bionic- proposed) and 2 in libmpfr 3.1.6
mpfr4-4.0.0/src/mpfr.h:#define MPFR_PREC_MIN 1 mpfr4-3.1.6/src/mpfr.h:#define MPFR_PREC_MIN 2 Please downgrade to the versions in bionic until the publication of all the dependent packages in proposed is done. ** Summary changed: - gnome-calculator crashed with SIGABRT in mpfr_assert_fail → mpfr_init2 → mpc_init3 → mpc_pow_usi_naive → mpc_pow_usi (regression with mpclib3 1.1.0-1) + gnome-calculator crashed with SIGABRT in mpfr_assert_fail → mpfr_init2 → mpc_init3 → mpc_pow_usi_naive → mpc_pow_usi ** Changed in: mpclib3 (Ubuntu) Importance: High => Medium -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1745188 Title: gnome-calculator crashed with SIGABRT in mpfr_assert_fail → mpfr_init2 → mpc_init3 → mpc_pow_usi_naive → mpc_pow_usi To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-calculator/+bug/1745188/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs