[Bug 239516] readelf -wf segfaults on most (all?) debug info files

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=239516

--- Comment #2 from me at pacopascal.com ---
Created attachment 206867
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=206867&action=edit
Robustness patch

Adding logic similar to the "robustness patch" I provided may be worthwhile. If
another programmer using libdwarf makes a similar mistake, having it fail
gracefully may be preferable over a segfault. For example, running readelf
without the "proposed patch" would yield:


$ readelf -wf /usr/lib/debug/bin/cat.debug

The section .eh_frame contains:

Assertion failed: (ds->ds_data != NULL), function _dwarf_frame_section_init,
file /usr/src/contrib/elftoolchain/libdwarf/libdwarf_frame.c, line 465.
Abort trap
$

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