Changing the type of a member in a structure at the start of an array in linear view changes the type of the array, not the member

[op2786]

Version and Platform (required):

• Binary Ninja Version: 3.6.4719-dev, dec72a07
• OS: macos
• OS Version: 14.2
• CPU Architecture: arm64

Bug Description: In the screenshot below I want to set MajorFunction to one of IRP_MJ enumeration in linear view but without changing the type of MajorFunction to enum IRP_MJ.

Here is how it is look like before I try to set MajorFunction to enumeration:

This is what I got when I click on 0x0 in line uint8_t MajorFunction = 0x0, press M and select IRP_MJ_CREATE.

I noticed that when I click on 0x1 in line uint8_t MajorFunction = 0x1 and press M select enum dialog does not open up. Probably this is why it corrupts the stucture. What happening there is probably when I do this in uint8_t MajorFunction = 0x0, actually it is the start offset of the structure. So even if I believe I'm doing enum select operation in line uint8_t MajorFunction = 0x0, it is actually doing that for the start offset of the structure, and creates a enumeration variable there.

Expected Behavior: I expect BN to allow me select enumeration in structure members in linear view

[xusheng6]

You guess is probably right. The good news is that we have more information than the address to disambiguate it, thus it can be fixed without requiring a major change.

I also changed the title to be more informative.