[Bug c/79509] New: m68k/coldfire: Internal error, aborting at dw2gencfi.c:214 in emit_expr_encoded

[wbx at openadk dot org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79509

            Bug ID: 79509
           Summary: m68k/coldfire: Internal error, aborting at
                    dw2gencfi.c:214 in emit_expr_encoded
           Product: gcc
           Version: 6.3.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: wbx at openadk dot org
  Target Milestone: ---

At least three packages in Buildroot are failing with this Internal Error
for m68k/coldfire target. GCC 6.3, Binutils 2.26.1 is in use.

The problem can be avoided by using -fno-dwarf2-cfi-asm in CXXFLAGS.

The packages failing are: 
kmsxx from https://github.com/tomba/kmsxx
lcdapi from https://github.com/spdawson/lcdapi
libasplib from https://github.com/AchimTuran/asplib

Not sure how to provide a simple test case.
It seems only to happen for C++ applications/libraries.