Re: [PATCH v7 0/3] MR8515: setupapi: Support in-built properties for device instances in SetupDiGetDevicePropertyW.

[Vibhav Pant (＠vibhavp)]

> Is it ever possible for this function to return an empty string, or a string not representing a GUID?

In the case of `SPDRP_BASE_CONTAINERID`, if a device driver responds to an `IRP_MN_QUERY_ID` IRP for the container ID with an invalid GUID string, we seem to store the returned string in the registry without verification (in ntoskrnl.exe/pnp.c/enumerate_new_device). It's probably worth it to at least log an error if we are not able to parse it. Thanks.

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https://gitlab.winehq.org/wine/wine/-/merge_requests/8515#note_109354