afl_custom_init' not found

[marvi3]

I tried to use the js_parser. When I used the xml_parser everything works fine but when I use the js_parser it gives me the following error:

[-] PROGRAM ABORT : Symbol 'afl_custom_init' not found.
Location : load_custom_mutator(), src/afl-fuzz-mutators.c:198
I looked into the TreeMutation.cpp from the js_parser and it indeed does not have afl_custom_init while the TreeMutation.cpp in the xml_parser does have afl_custom_init.

This happens on startup of afl when the custom mutator library is being loaded.