[ python-Bugs-1659171 ] Calling tparm from extension lib fails in Python 2.5

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Bugs item #1659171, was opened at 2007-02-13 18:27
Message generated for change (Comment added) made by richyk
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Category: Extension Modules
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Richard B. Kreckel (richyk)
Assigned to: Nobody/Anonymous (nobody)
Summary: Calling tparm from extension lib fails in Python 2.5

Initial Comment:
Attached is a little C++ module that fetches the terminal capability string for turning off all attributes and runs it through tparm(). (All this is done in a static Ctor of a class without init function, but never mind.)

Compile with:
g++ -c testlib.cc
g++ testlib.o -o testlib.so -shared -Wl,-soname,testlib.so -lncurses

On SuSE Linux 10.1 (and older), I get the expected behavior:

Python 2.4.2 (#1, Oct 13 2006, 17:11:24) 
[GCC 4.1.0 (SUSE Linux)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import testlib
Terminal is "xterm"
Dump of sgr0: 1b 5b 30 6d
Dump of instance: 1b 5b 30 6d
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
ImportError: dynamic module does not define init function (inittestlib)
>>> 

However, on SuSE Linux 10.2, tparm creates a NULL pointer:
Python 2.5 (r25:51908, Jan  9 2007, 16:59:32) 
[GCC 4.1.2 20061115 (prerelease) (SUSE Linux)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import testlib
Terminal is "xterm"
Dump of sgr0: 1b 5b 30 6d
Rats! tparm made a NULL pointer!
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: dynamic module does not define init function (inittestlib)
>>> 

Why, oh why?


----------------------------------------------------------------------

>Comment By: Richard B. Kreckel (richyk)
Date: 2007-02-14 09:52

Message:
Logged In: YES 
user_id=1718463
Originator: YES

I suspect that this is a duplicate of Bug [1548092].
Note that, there it is asserted that tparm returns NULL on certain invalid
strings.
That does not seem to be true. It returns NULL for valid trivial strings,
too.


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