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

[Tomasz Ziętkiewicz]

There are 2 workarounds for this: 
1. Convert printers.py to python3 yourself:

$ cd /usr/share/gcc-4.8/python/libstdcxx/v6/
$ 2to3 -w printers.py

2. Use this patch: http://gcc.gnu.org/ml/libstdc++/2013-10/msg00243.html

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https://bugs.launchpad.net/bugs/1258642

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

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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