program will crash when tips containing "unusual characters"

[Cactusolo]

for plant species names, sometimes there is hybrid species, which named as "Genus × epithetic".
So if a newick tree containing tips with "×" symbol, using function of "nw_labels, nw_renames", etc in newickutils, it will crash.

For example,
[cactus]$ nw_labels -I speciesname.tre|wc -l

ERROR: missing ')' at line 0 near 'leylandii'

0

if I use phyx to check which tip has the issue:

[cactus]$ pxlstr -t speciesname.tre -i|grep "leylandii"

Cupressus_×leylandii

Appreciate if you can fix it.

Thanks!

Miao