Created attachment 7086 [details]
config file

The output of the following script is 42, but randomly only 4.
Runnig the script 10000 times it gives me 150 wrong result, 4.

=============== script.sh ===========

#!/usr/bin/busybox ash

read a << EOFA
4
EOFA

read b << EOFB
2
EOFB

echo "$a$b"