While working on fsolve bug I've noticed the following in valgrind log:
==17455== 136 (56 direct, 80 indirect) bytes in 1 blocks are definitely lost in loss record 16 of 19
==17455== at 0x4C249C7: operator new(unsigned long) (vg_replace_malloc.c:220)
==17455== by 0x516CA70: GiNaC::power::eval(int) const (power.cpp:540)
==17455== by 0x4FC1E39: GiNaC::ex::construct_from_basic(GiNaC::basic const&) (ex.cpp:310)
==17455== by 0x406FBF: main (ex.h:255)
Heap allocated objects definitely need the status_flags::dyncallocated flag.