Crash in parse_types_from_source with options -x c and --std c99

[ElykDeer]

There appears to be a bug in Binary Ninja's type parser when combining -x c and --std c99 options. The segfault occurs specifically when both flags are present, while using either flag alone works (though with expected parsing errors).

1. Segfault only happens with both -x c and --std c99
2. Issue reproduces across platforms (arm32 and x86-64)
3. BN version: 4.3.6468-dev

(credit to @fosdickio for the report)

[CouleeApps]

Can't reproduce? What steps are you taking to cause this crash and what type / args are you parsing that causes this?

[waskyo]

Hi, attached is the source file that is causing the issue. I'm able to parse other files without problems.

Here are my repro steps:

from binaryninja import *
bv = load("/bin/ls") # This is x86-64, but i've also tried arm32 with the same results
with open("/tmp/segfault.c") as f:
     source = f.read()

tp = TypeParser.default
tp.parse_types_from_source(source=source, file_name='segfault.c', platform=bv.platform, options=["-x", "c", "--std", "c99"])
Segmentation fault

segfault.c.txt