DllStructCreate() issue with handling errors: Error allocating memory

[mLipok]

According to the HelpFile:
​https://www.autoitscript.com/autoit3/docs/functions/DllStructCreate.htm

Return Value
Success:	a variable for use with DllStruct calls.
Failure:	sets the @error flag to non-zero.
@error:	1 = Variable passed to DllStructCreate was not a string.
2 = There is an unknown Data Type in the string passed.
3 = Failed to allocate the memory needed for the struct, or Pointer = 0.
4 = Error allocating memory for the passed string.

this:

#AutoIt3Wrapper_UseX64=Y
DllStructCreate("byte[123456789097]")

Issue/Question 1: in x32 AutoIt version
Why AutoIt fires MsgBox error and quit proceesing rest of the script, instead of simply setting @error = 3 (eventually @error = 4) ?

Issue/Question 2: in x64 AutoIt version
Why AutoIt does not set @error = 3 (eventually @error = 4) ?

Related discussion:
​https://www.autoitscript.com/forum/topic/154081-avoid-autoit-error-message-box-in-unknown-errors/page/5/#findComment-1548049

​https://www.autoitscript.com/forum/topic/154081-avoid-autoit-error-message-box-in-unknown-errors/page/5/#findComment-1548054