[Bug libbacktrace/88244] New: [libbacktrace] Failure to open .gnu_debuglink is silent

[vries at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88244

            Bug ID: 88244
           Summary: [libbacktrace] Failure to open .gnu_debuglink is
                    silent
           Product: gcc
           Version: 9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libbacktrace
          Assignee: unassigned at gcc dot gnu.org
          Reporter: vries at gcc dot gnu.org
                CC: ian at gcc dot gnu.org
  Target Milestone: ---

Created attachment 45113
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=45113&action=edit
Test-case

Attached test-case exercises libbacktrace with a broken .gnu_debuglink:
...
$ ./etest 
test1: [0]: missing file name or function name
FAIL: backtrace_full noinline
test2: [0]: missing file name or function name
FAIL: backtrace_full inline
test3: [0]: missing file name or function name
FAIL: backtrace_simple noinline
test4: [0]: missing file name or function name
FAIL: backtrace_simple inline
PASS: backtrace_syminfo variable
...

While the test-case is verbose about not finding specific debug info,
libbacktrace is silent about the underlying issue: failing to open
.gnu_debuglink.