[Python-Dev] stack check on Unix: any suggestions? (original) (raw)

M.-A. Lemburg mal@lemburg.com
Thu, 31 Aug 2000 17:24:58 +0200

Guido van Rossum wrote:

> Here's a sample script: > > i = 0 > def foo(x): > global i > print i > i = i + 1 > foo(x) > > foo(None) Please try this again on various platforms with this version: i = 0 class C: def getattr(self, name): global i print i i += 1 return self.name # common beginners' mistake C() # This tries to get init, triggering the recursion I get 5788 iterations on Red Hat Linux 6.2 (ulimit -c says 8192; I have no idea what units).

8192 refers to kB, i.e. 8 MB.

I get 6053 on SuSE Linux 6.2 without resource stack limit set.

Strange enough if I put the above inside a script, the class isn't instantiated. The recursion only starts when I manually trigger C() in interactive mode or do something like 'print C()'. Is this a bug or a feature ?

-- Marc-Andre Lemburg

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