[Bug 1241668] Re: gdb embeds python3.3, but support scripts are not compatible

[Peter Feiner]

For anybody that's too impatient to wait for the saucy packages to be
updated, here's how you apply the patch yourself:

wget -O - http://hg.python.org/cpython/raw-
file/ef4636faf8bd/Tools/gdb/libpython.py | sudo tee
/usr/lib/debug/usr/bin/python2.7-gdb.py

wget -O - http://hg.python.org/cpython/raw-
file/752db82b7933/Tools/gdb/libpython.py | sudo tee
/usr/lib/debug/usr/bin/python3.3m-gdb.py

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https://bugs.launchpad.net/bugs/1241668

Title:
  gdb embeds python3.3, but support scripts are not compatible

Status in Python:
  Fix Released
Status in “gdb” package in Ubuntu:
  Invalid
Status in “python2.7” package in Ubuntu:
  Triaged
Status in “python3.3” package in Ubuntu:
  Triaged
Status in “gdb” source package in Saucy:
  Invalid
Status in “python2.7” source package in Saucy:
  Triaged
Status in “python3.3” source package in Saucy:
  Triaged

Bug description:
  The saucy gdb appears to be linked against libpython3.3.

  This results in a conflict when trying to debug python2.7 programs,
  which use the python2.7-dbg.py scripts from python2.7-dbg.  This makes
  debugging Python programs difficult.

  
    File "/usr/lib/debug/usr/bin/python2.7-gdb.py", line 54
      Py_TPFLAGS_HEAPTYPE = (1L << 9)
                              ^
  SyntaxError: invalid syntax
    File "/usr/lib/debug/usr/bin/python2.7-gdb.py", line 54
      Py_TPFLAGS_HEAPTYPE = (1L << 9)

  There are also invalid print statements that show up as well.

  If these are updated, then the file parses, but `py-bt` fails with:

  Error occurred in Python command: global name 'long' is not defined

  Updating all of the long() references to int() doesn't work:

  Error occurred in Python command: 'gdb.Value' object cannot be
  interpreted as an integer

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