This is the issue breaking the postgresql bot, purely by chance exposed through taint checker, somehow appearing after https://reviews.llvm.org/D38358 got committed.
The backstory is that the taint checker requests SVal for the value of the pointer, and analyzer has a "fast path" in the getter to return a constant when we know that the value is constant.
Unfortunately, the getter requires a cast to get signedness correctly, and for the pointer void * the cast crashes.
This is more of a band-aid patch, as I am not sure what could be done here "correctly", but it should be applied in any case to avoid the crash.
@dcoughlin faster review here would be appreciated to get the bot back to green.