#1 error while loading shared libraries: libreadline.so.4

[Stefan Sauer]

refdbg -c "btnum=8 r0=<BtEditApplication>" ./bt-edit
--gst-debug="*:2,bt-*:4"
./bt-edit: error while loading shared libraries:
libreadline.so.4: cannot open shared object file: No
such file or directory

starting the binary normally works