'?' and '??' fail under Sun OS

[psismurf]

Any attempt to get object information using the '?' or '??' operators causes the session to lock up and become unresponsive to any keystrokes (including Ctrl-C and -Z). The help(obj) command however works as advertised. This occurs under both sparc and x86 installations running the same python builds and ipython versions.

Python 2.6.2 (r262:71600, May 27 2009, 13:06:14) [C]
IPython 0.10 -- An enhanced Interactive Python.
SunOS 5.10 Generic_138888-08 sun4u sparc SUNW,Sun-Fire-280R
and also under
SunOS 5.10 Generic_127112-03 i86pc i386 i86pc

[Fernando Perez (fdo.perez)]

Hi,

On Tue, Sep 22, 2009 at 7:25 AM, psismurf <email address hidden> wrote:
> Public bug reported:
>
> Any attempt to get object information using the '?' or '??' operators
> causes the session to lock up and become unresponsive to any keystrokes
> (including Ctrl-C and -Z). The help(obj) command however works as
> advertised. This occurs under both sparc and x86 installations running
> the same python builds and ipython versions.

I have a strong suspicion this is due to a bug in solaris curses.
Could you run this in a normal python session and see if it locks up
also?

import termios, curses, sys

if 1:
            term_flags = termios.tcgetattr(sys.stdout)
            scr = curses.initscr()
            screen_lines_real,screen_cols = scr.getmaxyx()
            curses.endwin()
            # Restore terminal state in case endwin() didn't.
            termios.tcsetattr(sys.stdout,termios.TCSANOW,term_flags)

If so, can you let us know what os.name and sys.platform return on
your machine? We may have to avoid that code altogether in solaris...

Cheers,

f

[psismurf (simon-murphy-nz)]

Running the above code in a normal python session (Python 2.6.2 (r262:71600, May 27 2009, 13:06:14) [C] on sunos5) reproduces the problem.

>>> os.name
'posix'
>>> sys.platform
'sunos5'

[Fernando Perez (fdo.perez)]

On Tue, Sep 22, 2009 at 10:18 PM, psismurf <email address hidden> wrote:
> Running the above code in a normal python session (Python 2.6.2
> (r262:71600, May 27 2009, 13:06:14) [C] on sunos5) reproduces the
> problem.

OK, thanks. You may want to report this as a python bug then, since
there's nothing ipython can do about it.

>>>> os.name
> 'posix'
>>>> sys.platform
> 'sunos5'

Thanks. With this info, we can avoid this codepath on solaris.

I'll put together a fix for this problem, thanks for the report.

Cheers,

f

[psismurf (simon-murphy-nz)]

Thanks Fernando, will do.

Cheers,
   Simon

[Fernando Perez (fdo.perez)]

Workaround committed to trunk and 0.10.1 branch. Thanks!