[Bug 1258642] Re: gdb: Python 3 incompatible with libstdc++ pretty printers.

[Ryan Tandy]

John, the pretty-printer for go is covered by bug 1283626, and it sounds
like 2to3 is able to convert that file automatically. Hope that helps.

Adding gcc-4.8 to this bug since that's where the STL pretty-printer
comes from, and I think it's more likely to be fixed there than by
reverting gdb back to linking against python2.

** Also affects: gcc-4.8 (Ubuntu)
   Importance: Undecided
       Status: New

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Title:
  gdb: Python 3 incompatible with libstdc++ pretty printers.

Status in “gcc-4.8” package in Ubuntu:
  New
Status in “gdb” package in Ubuntu:
  Confirmed

Bug description:
  gdb is now linked against python 3 but python 3 is incompatible with
  libstdc++'s pretty printers:

  Traceback (most recent call last):
    File "<string>", line 4, in <module>
    File "/usr/share/gcc-4.8/python/libstdcxx/v6/printers.py", line 54
      raise ValueError, "Cannot find type %s::%s" % (str(orig), name)
                      ^
  SyntaxError: invalid syntax
  /home/ruediger/.gdbinit:7: Error in sourced command file:
  Error while executing Python code.

  There is a proposed patch but it wasn't upstreamed yet: http://www
  .mail-archive.com/gcc-patches at gcc.gnu.org/msg65185.html

  I'd propose either to continue using python2 for gdb, fixing the
  details to get the patch upstream, or use a patched version downstream
  for now.

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