Is your feature request related to a problem? Please describe.
The feature request is related to being unable to simulate code that uses asciz in the data section.

Describe the solution you'd like
Code that uses the asciz data type to be simulatable.

Describe alternatives you've considered
None.

Additional context
None

Describe the bug
Hitting "Compile" causes AsmEditor to crash with message

terminate called after throwing an instance of 'std::out_of_range'
  what():  basic_string::substr: __pos (which is 18446744073709551615) > this->size() (which is 1)
[1]    34863 abort (core dumped)  ./AsmEditor

To Reproduce
Steps to reproduce the behavior:

1. Enter source code below
2. Click on 'Compile'
3. See error in Terminal.

Expected behavior
Compile source

Source code pasted into editor

.global main 

main:
	mov r0, #10		/* a -> R0	*/
	mov r1, #16		/* b -> R1	*/
	mov r2, #4		/* c -> R2	*/

	sub r0, r0, r2		/* d -> R0, d = a - c	*/
	
	mul r2, r0, r2		/* a -> R2, a = 3 + c * d	*/
	add r2, r2, #3  	/* c =+ 3	*/

	lsr r1, r1, #1		/* b = b/2	*/
	add r1, r1, r2		/* c -> R1, c = b / 2 + a	*/
	
	mul r0, r2, r0 		/* d =* a	*/
	sub r0, r0, r1		/* a = d - c*/

end:
	bx lr

This works on the RBG ARM-Server, so I suspect it's not me crashing the emulator.

Desktop (please complete the following information):

• OS: Linux Manjaro