[Bug 1255573] Re: libstdc++ debug script sets wrong PYTHONPATH

[kajokeji]

In file /usr/lib/debug/usr/lib/x86_64-linux-gnu/libstdc++.so.6.0.19-gdb.py (from trusty ,
I may suggest changing the line:
backdirs = len (libdir.split (os.sep))
by
backdirs = len (libdir.split (os.sep))-1

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https://bugs.launchpad.net/bugs/1255573

Title:
  libstdc++ debug script sets wrong PYTHONPATH

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

Bug description:
  libstdc++6-4.8-dbg on installs /usr/lib/debug/usr/lib/x86_64-linux-
  gnu/libstdc++.so.6.0.18-gdb.py. This is supposed to autoload the
  pretty-printers for libstdc++ into gdb when a program is started.
  However, its logic for determining the path to set seems to be broken,
  because it leads to this error in gdb:

  Traceback (most recent call last):
    File "/usr/lib/debug/usr/lib/x86_64-linux-gnu/libstdc++.so.6.0.18-gdb.py", line 60, in <module>
      from libstdcxx.v6.printers import register_libstdcxx_printers
  ImportError: No module named 'libstdcxx'
  DIR = /usr/lib/x86_64-linux-gnu/../share/gcc-4.8/python
  Traceback (most recent call last):
    File "/usr/lib/debug/usr/lib/x86_64-linux-gnu/libstdc++.so.6.0.18-gdb.py", line 60, in <module>
      from libstdcxx.v6.printers import register_libstdcxx_printers
  ImportError: No module named 'libstdcxx'

  And STL containers are not pretty-printed. Manually adding
  /usr/share/gcc-4.8/python to the PYTHONPATH (e.g. by writing Python
  code in .gdbinit) fixes the problem.

  I am running Ubuntu 13.10 on x86_64. I've also noticed the problem on
  13.04 with libstdc++6-4.7-dbg.

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