ReGa crashes by allocating too much memory

[MichaelN0815]

Describe the bug

Creating a too long string in HM Skript leads to ReGa Crash

Steps to reproduce the behavior
Run this Skript with only 2 GB RAM:

string a = "A";
integer b = 27;
while (b > 0) {
  b = b - 1;
  a = a # a;
}

in error log you will found:

Sep 21 22:31:03 homematic-raspi local0.emerg ReGaHss: CRASH: Allocating memory of size 134218761 bytes failed! [IseAllocMemory():ise_mem.cpp:26]
Sep 21 22:31:03 homematic-raspi local0.err ReGaHss: ERROR: Alloc() failed [format():ise_ntl.cpp:898]
Sep 21 22:31:10 homematic-raspi user.info kernel: [  314.414614] ReGaHss[717]: segfault at 0 ip 00000000080739b4 sp 00000000f77fe93c error 6 in ReGaHss[804d000+151000]
Sep 21 22:31:10 homematic-raspi user.info kernel: [  314.414625] Code: c2 1a 00 00 89 5c 24 20 83 c4 18 5b e9 a5 9d fd ff 66 90 66 90 90 8b 44 24 04 c7 80 90 00 00 00 00 00 00 00 8b 80 88 00 00 00 <c6> 00 00 c3 8d b4 26 00 00 00 00 90 56 53 83 ec 04 8b 5c 24 10 8b
Sep 21 22:31:21 homematic-raspi user.err monit[794]: 'ReGaHss' process is not running
Sep 21 22:31:21 homematic-raspi user.info monit[794]: 'ReGaHss' trying to restart
Sep 21 22:31:21 homematic-raspi user.info monit[794]: 'ReGaHss' restart: '/etc/init.d/S70ReGaHss restart'
Sep 21 22:31:41 homematic-raspi user.err monit[794]: 'ReGaHss' service restarted 1 times within 1 cycles(s) - exec
Sep 21 22:31:41 homematic-raspi user.info monit[794]: 'ReGaHss' exec: '/bin/triggerAlarm.tcl ReGaHss restarted WatchDog: regahss-restart true'
Sep 21 22:31:41 homematic-raspi user.info monit[794]: 'ReGaHss' process is running with pid 1322
Sep 21 22:31:41 homematic-raspi user.info monit[794]: 'ReGaHss' process is running after previous restart timeout (manually recovered?)

Expected behavior

no crash of ReGa, but stops the skript with defined error in error log

Additional context
see https://homematic-forum.de/forum/viewtopic.php?f=26&t=69685#p679692