no. It's not OK. It is crashing.

steps to reproduce:
1. open a .svg that uses feImage
2. open the filter effects dialog
3. select the filter that uses the feImage primitive
4. try to add another primitive

then it crashes

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread -1228871984 (LWP 15357)]
0xb6e6a989 in free () from /lib/libc.so.6