[Bug python/10682] New: gdb.backtrace doesn't handle reloading well

["jason dot orendorff at gmail dot com" <sourceware-bugzilla at sourceware dot org>]

First, if push_frame_filter is called more than once, create_frame_filter dies.
The lambda created in push_frame_filter calls itself recursively.

Second, and more seriously, the gdb.backtrace.push_frame_filter API is not
really suitable to be called by a Python extension at import time. It's
effectful and non-idempotent.

I hit both problems the first time I tried reload()ing a module that registers a
frame filter. :-|

It will be hard to fix without changing the API. The (untested) attachment
attempts one gruesome hack, but I hope you can take a breaking API change instead.

-- 
           Summary: gdb.backtrace doesn't handle reloading well
           Product: gdb
           Version: archer
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: python
        AssignedTo: unassigned at sourceware dot org
        ReportedBy: jason dot orendorff at gmail dot com
                CC: gdb-prs at sourceware dot org


http://sourceware.org/bugzilla/show_bug.cgi?id=10682

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