Comment 21 for bug 2007642

rustc decides to emit both:

 <2><2f5b>: Abbrev Number: 10 (DW_TAG_subprogram)
...
    <2f6e> DW_AT_name : (indirect string, offset: 0x23a): main

and

 <2><2f95>: Abbrev Number: 2 (DW_TAG_namespace)
    <2f96> DW_AT_name : (indirect string, offset: 0x23a): main

in the same scope.

Then the lookup finds the wrong one, because gdb's symbol tables
are bad and still follow C namespace rules.