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[Bug python/19288] need a way to see if an address is covered by some existing object


https://sourceware.org/bugzilla/show_bug.cgi?id=19288

--- Comment #12 from Pedro Alves <palves at redhat dot com> ---
> i) other standard unwinders will grab the problematic frames (such as level == -1 frames)

I'm not sure how you get that.  I tried "b pyuw_sniffer if this_frame->level ==
-1" (with no actual Python unwinder installed, alas) and it doesn't trigger. 
Sounds like consequences from the recursion/reinit_frame_cache and then bad
things happening.  AFAICS, you should never get the sentinel frame as a
PendingFrame.

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