Catching a segfault in a Python library

Donn Ingle donn.ingle at
Sat Nov 24 15:22:11 CET 2007

> I think the idea is, certain fonts in his collection may be corrupt,
> and he wants to just scan through and load them, ignoring the ones
> that make the program crash.  
Ya got me! Sheesh, I can't hide anywhere :D

> The bug in this case lies with a third 
> party and isn't something he can easily fix (although he can file
> reports to the third party (PIL)).
I've a bad memory and can't recall what I told PIL at the time. It might
have been a case of waiting to see what new versions can do.

> not nice for the application to just crash when that happens, asking
> them if they want to debug it.  
Zigactly! You can wrap try/except around the calls that (by debugging) you
know are the culprits, but a segfault is a segfault and bam! you are at the
command line again.

> I haven't really found a solution, 
> just have tried to prevent corrupted files in the system for now.  Let
> me know if you get this solved
I'll certainly pop a note. I think, though, that the answer may reside in
the basic theme of this thread:

 result = runActualApp( )
 while True:
  if result == allokay: break
   <Start handling the horror>

Unless a segfault goes through that too, like Krypton through Superman.

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