Hi all! I have a problem with hugin outputting data to cerr when I use it from Python, but it may point to a general problem. Hugin uses a set of macros to produce warning and error output when in debug mode. Recently I've experienced two occasions when these macros weren't made dependent on the setting of the DEBUG define but just activated anyway; currently this is the case in src/hugin_base/hugin_utils/ utils.h., line 87-94.This wouldn't be a great problem, if the output to cerr didn't crash Python when it uses hugin or other programs linking to libhuginbase.so the very moment the first string is out. Assume the C++ code does something like
cerr << "WARN:" << "blah blah" << endl ; All I get to see in Python is WARN: Speicherzugriffsfehler (that is, memory error.) - so I get to see the first string 'WARN:' but then the crash happens, which looks like an error in cerr.operator<<(). The strange thing is that this only occurs with output to cerr, cout is unaffected. Does anyone have any ideas if maybe something is done to cerr which is incompatible - like some evil trickery to make it do things it's not supposed to? I've managed to reduce the problem to the linking in of libhugin.so - If I run an ordinary C++ program from Python as a subprocess, using cerr is just fine, even mixed with stdio routines, but as soon as I link in libhugin.so, the call to cerr shows the erroneous behaviour. For now, I'll modify utils.h back to only do output when DEBUG is set. I'd be grateful if, whoever unleashes the DEBUG_ macros outside DEBUG mode would only do these changes locally. Any ideas about the cerr problem would be welcome, though, because there definitely is a problem, and just avoiding it isn't a good strategy. Kay -- You received this message because you are subscribed to the Google Groups "Hugin and other free panoramic software" group. A list of frequently asked questions is available at: http://wiki.panotools.org/Hugin_FAQ To post to this group, send email to hugin-ptx@googlegroups.com To unsubscribe from this group, send email to hugin-ptx+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/hugin-ptx
