Hi, Am 14. November 2011 15:04 schrieb Friedrich Romstedt <friedrichromst...@gmail.com>: > 2011/11/14 Michael Droettboom <md...@stsci.edu>: >> Thanks for all the time you've devoted to this. It does look like possibly >> some kind of compiler bug. The font loads and renders fine on Linux, for >> what it's worth (just as a data point). >> >> To confirm this theory: if you move NISC1803.ttf somewhere temporary, delete >> ~/.matplotlibrc/fontList.cache and then import matplotlib, do you get the >> crash? That at least confirms that loading this font file triggers the bug >> (wherever the bug may be). Test with matplotlib 1.1.0 or git master so we >> have a sense of the current behavior. > > Hi Mike, > > the following fonts on my system are offending: > > /Library/Fonts/NISC18030.ttf > /Library/Fonts/AppleMyungjo.ttf > /Library/Fonts/Gungseouche.ttf > > With these fonts made unfindable by matplotlib (:file:`*.ttf_`) it > exits cleanly. > > I will provide with a patch to matplotlib for an rc setting > "fonts.bus-error : ...", e.g. ``fonts.bus-error : NISC18030.ttf, > AppleMyungjo.ttf, Gungseouche.ttf`` in the next days.
I just took the time to recompile the whole thingy, including supporting libraries. I used: – libfreetype-2.4.9 – matplotlib-1.1.0 – MACOSX_DEPLOYMENT_TARGET=10.5 – The files noted in the citation above are in place (i.e., accessible as .ttf files) My theory was that a compiler error triggers the error with the font files in question. Because recompiling ft2font.so with a different MACOSX_DEPLOYMENT_TARGET made the crash disappear I supposed that ft2font would trigger that compiler error. It needed to be a compiler error because that environment variable was the only change that made the crash disappear. Now it is the question if with more recent software that error still persists. I have found that this is not the case. I recompiled with the libraries noted above (all compiled from source), and I can successfully import matplotlib.figure. This import previously provoked the crash. So I believe that either I was wrong in some respect, or the more recent software toolchain no longer provokes the crash, because its code changed. Since it works just flawlessly on my system now, I see little need to implement the mechanism for excluding font files from being loaded – if it is not needed I will not code it. Friedrich P.S.: Of course I moved the font cache before, so that it is recreated when importing matplotlib.figure for the first time. P.P.S.: One more difference is that the current Python is not a framework Python anymore, but a regular Python. > It was clear from the beginning (well, from the point I got a handle > on it), that loading the font makes the 2009 matplotlib crash. The > only question unanswered is where the codepath is that triggers this > compiler bug (I think the compiler but hypothesis is not disproven and > works well atm). If the code path is in ft2font.cpp, we could (you > could) reformulate ft2font.cpp in an equivalent way with the exception > that it is not equivalent in crashing. You might want to augment > ft2font.cpp by printf() or something to see if the crash appears > inside a call to libfreetype or if all those calls return cleanly. > > To my understanding, since recompiling ft2font.so without > MACOSX_DEPLOYMENT_TARGET different from 10.6 helps, ft2font.cpp should > be the culprit resp. victim. The only alternative I'm seeing would be > that it has to to do with the load mechanism of the dylib, but I deem > this rather unlikely. Well, unlikely is not the best word in this > context, since all this things here were pretty unlikely. > > If the codepath is in libfreetype this would be an issue for their list. ... > > Friedrich ------------------------------------------------------------------------------ This SF email is sponsosred by: Try Windows Azure free for 90 days Click Here http://p.sf.net/sfu/sfd2d-msazure _______________________________________________ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
