[Python-bugs-list] [ python-Bugs-463359 ] Interpreter generates infinite loop

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Bugs item #463359, was opened at 2001-09-20 15:11
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Category: Python Interpreter Core
Group: None
>Status: Closed
>Resolution: Fixed
Priority: 5
Submitted By: Ken Lalonde (kenlalonde)
Assigned to: Thomas Wouters (twouters)
Summary: Interpreter generates infinite loop

Initial Comment:
The simple attached script loops forever when run
from the command line with no arguments.
It's as if the "break" statement transfers control back
to the start of the script.

Am I losing my mind, or is the interpreter?

My platform is sun/solaris 2.7/sparc,
Python 2.1.1 (#1, Aug  9 2001, 17:14:49) 
[GCC 2.95.2 19991024 (release)] on sunos5


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>Comment By: Thomas Wouters (twouters)
Date: 2001-09-24 12:40

Message:
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Gah. found it. How embarrassing (as I suspected.) My only solace 
is that Jeremy accepted the patch <wink>. The ugly hack of 
re-creating the just-popped frame-block in the case of a continue 
swapped the 'handler' and 'stacklevel' arguments to 
PyBlock_BlockSetup! And any subsequent break or exception would 
use the wrong handler and the wrong stack level to pop to.

Don't ask me *how* I found it; I'm afraid something will go wrong 
with the fabric of space if I admit I found such an obscure bug 
with such little effort :)

Fixed in revision 2.277 of Python/ceval.c.




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Comment By: Guido van Rossum (gvanrossum)
Date: 2001-09-20 15:16

Message:
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user_id=6380

Another "continue-in-try" bug, or the same one?

Given to Thomas for review.

Broken in 2.2 as well.

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http://sourceforge.net/tracker/?func=detail&atid=105470&aid=463359&group_id=5470