[Bug target/65931] New: [5/6 regression] dsymutil assertion failure building libgnat-5.dylib

[ro at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65931

            Bug ID: 65931
           Summary: [5/6 regression] dsymutil assertion failure building
                    libgnat-5.dylib
           Product: gcc
           Version: 6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: ro at gcc dot gnu.org
                CC: howarth.at.gcc at gmail dot com, iains at gcc dot gnu.org
  Target Milestone: ---
              Host: x86_64-apple-darwin14.3.0
            Target: x86_64-apple-darwin14.3.0
             Build: x86_64-apple-darwin14.3.0

For about two weeks (thus affecting both the gcc-5 branch and mainline), Ada
bootstrap on Mac OS X 10.10.3 is broken:

cd rts; dsymutil libgnat-5.dylib
Assertion failed: (linked_addr_pos != line_table_map.end()), function
FixReferences, file
/SourceCache/dwarf_utilities/dwarf_utilities-121/source/DWARFdSYM.cpp, line
3883.
/bin/sh: line 1: 85928 Abort trap: 6           dsymutil libgnat-5.dylib
make[3]: *** [gnatlib-shared-darwin] Error 134

This is dsymutil from dwarfutils-121.  I haven't yet checked if gcc's DWARF
output
changed in a way dsymutil cannot handle or dsymutil was upgraded (from Mac OS
10.10.2 to .3) adding some bogus check.

  Rainer