[Bug python/11407] -stack-list-locals should catch python exceptions and return the error per variable

["pmuldoon at redhat dot com" <sourceware-bugzilla at sourceware dot org>]

------- Additional Comments From pmuldoon at redhat dot com  2010-06-18 10:25 -------
Created an attachment (id=4845)
 --> (http://sourceware.org/bugzilla/attachment.cgi?id=4845&action=view)
another draft patch

This patch assumes that apply_val_pretty_printer can raise errors.  val_print
is called most commonly in the pretty printers by print_children.  This
function makes n*children calls to PyIter, which usually results in errors
arising from uninitialized data. These errors can come from *anywhere* within
Python.  If the exception is not handled here,	it will bubble up to the top
and GDB will stop executing.  In this patch, I catch the exception and print
the error and attempt to print out the data in raw format.  I guess we could
exit if we wanted to. This fixes the error cases in this bug.  This is draft
patch, what do you think?

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http://sourceware.org/bugzilla/show_bug.cgi?id=11407

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