CS:S - broken Event keyvalues (crashes in @Event)

[kirrm]

The 2026-09-16 update seems to have broken Event.variables KeyValues object

Event.variables.name works fine, but trying to access actual keyvalues data either returns default values or crashes:

@Event('player_death')
def _player_death(ev):
    print(f"{ev.variables.name=}")
    print(f"{ev.variables.get_int('userid')=}")  # Crash


@Event('player_spawn')
def _player_spawn(ev):
    print(f"{ev.variables.name=}")
    print(f"{ev.variables.get_int('userid')=}")  # returns default (0)

As such, trying to access Event variables without Event's own getter method (get_int, get_sting etc) will lead to either crashes or KeyErrors:

@Event('player_death')
def _player_death(ev):
    ev['userid']  # Crash

The workaround is using Event's own getter methods:

@Event('player_death')
def _player_death(ev):
    ev.get_int('userid')  # Works

[CookStar]

This issue seems to occur only on the CS:S x86 architecture.
While this specific issue is due to an unknown member variable being added to KeyValues, it is unclear whether other changes from TF2 have been backported to CS:S.

I've added a fix for the Windows version, so if you're able to test it, please do so.

kv_fix.zip

[CookStar]

it is unclear whether other changes from TF2 have been backported to CS:S.

Well, it does. However, it doesn't seem to be an addition in this update, so it probably won't have any impact.

[CookStar]

hl2sdk has been fixed, so #537 should resolve the issue. If you're able to compile it, please do so.

[srpg]

Here is the Compiled CSS Build including Windows and Linux binaries with the #537 fix, built against the latest SDK.
Also it includes my #535 updated data