[Bug libdw/30047] libdw unable to handle DW_TAG_unspecified_type

["mark at klomp dot org" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=30047

Mark Wielaard <mark at klomp dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|                            |2023-01-26
           Assignee|unassigned at sourceware dot org   |mark at klomp dot org
             Status|UNCONFIRMED                 |ASSIGNED
     Ever confirmed|0                           |1

--- Comment #3 from Mark Wielaard <mark at klomp dot org> ---
Created attachment 14633
  --> https://sourceware.org/bugzilla/attachment.cgi?id=14633&action=edit
tests: Handle DW_TAG_unspecified_type in funcretval test

This patch just fixes the testcase to check for DW_TAG_unspecified_type as
return type.
With your test binary tests/funcretval now prints:

() _start: returns unspecified type
() main: return value location: {0x50, 0}

But maybe a better fix is for dwfl_module_return_value_location to return zero
(which technically means that the function doesn't have a return value).

Opinions?

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