For-loop in decoder script

ChirpStack Application Server
#1

I try to use a for loop with incomplete syntax like this because I must increment inside of the code block depending on other values.

for ( statement 1 ; statement 2 ; ) { code block }

Javascript docu (https://www.w3schools.com/js/js_loop_for.asp) says it´s allowed, but I get an error message: “execute js error: execution timeout”

#2

It IS allowed and it´s working in the decoder script.
The reason for the error message was somewhere else.