> These segfaults have this sort of backtrace:

>

> #1 0x00007ffff7a07f79 in GiNaC::ex::construct_from_basic(...)

> #2 0x00007ffff79e19e2 in GiNaC::basic::subs_one_level(...) const

> #3 0x00007ffff7b3d235 in GiNaC::power::subs(...) const

> #4 0x00007ffff7a0ba11 in GiNaC::expairseq::subschildren(...) const

> #5 0x00007ffff7a0bd64 in GiNaC::expairseq::subs(...) const

> #6 0x00007ffff7a08d4e in GiNaC::ex::subs(...) const

> #7 0x00007ffff7aeb6c0 in GiNaC::gcd(...)

> #8 0x00007ffff7aea806 in GiNaC::gcd_pf_pow(...)

> #9 0x00007ffff7aebbd0 in GiNaC::gcd(...)

> #10 0x00007ffff7aeac26 in GiNaC::gcd_pf_pow(...)

> #11 0x00007ffff7aebbd0 in GiNaC::gcd(...)

>

> (repeat the last two lines a whole bunch of times)

>

> #20147 0x00007ffff7aebbd0 in GiNaC::gcd(...)

> #20148 0x00007ffff7aeac26 in GiNaC::gcd_pf_pow(...)

> #20149 0x00007ffff7aea2f8 in GiNaC::gcd_pf_pow(...)

 

Looks like gcd() goes to an infinite recursion. Could you please make a breakpoint in

GiNaC::gcd_pf_pow and print expressions which cause this misbehavior?

 

> #20150 0x00007ffff7aebbd0 in GiNaC::gcd(...)

> #20151 0x00007ffff7af214a in GiNaC::frac_cancel(...)

> #20152 0x00007ffff7af2b13 in GiNaC::mul::normal(...) const

> #20153 0x00007ffff7af2dd0 in GiNaC::add::normal(...) const

> #20154 0x00007ffff7af2947 in GiNaC::mul::normal(...) const

> #20155 0x00007ffff7ae613c in GiNaC::ex::normal() const

> #20156 0x00007ffff7ac73cc in GiNaC::matrix::solve(...) const

> #20157 0x0000000000404671 in main () at gauss-vs-bareiss.cpp:35

 

Best regards,

Alexey