Message 1691 - Python tracker

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Author	gvanrossum
Date	2000年10月02日.10:22:39
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The SyntaxError is actually caused by a bug in the parser code! When s_push() reports a stack overflow it returns -1, which is passed through unchanged by push() -- but the code that calls it only checks for positive error codes! I've fixed this by returning E_NOMEM from s_push() instead. The only downside I see of making MAXSTACK larger is that a stack of maximal size is allocated each time the parser is invoked. With MAXSTACK=500 on a 32-bit machine, that's 6K. Switch to 5000 and it's 60K. No big deal except perhaps for ports to PalmPilots and the like... Note that with MAXSTACK=500, you can "only" have 35 nested lists.

Content

The SyntaxError is actually caused by a bug in the parser code! When s_push() reports a stack overflow it returns -1, which is passed through unchanged by push() -- but the code that calls it only checks for positive error codes! I've fixed this by returning E_NOMEM from s_push() instead.
The only downside I see of making MAXSTACK larger is that a stack of maximal size is allocated each time the parser is invoked. With MAXSTACK=500 on a 32-bit machine, that's 6K. Switch to 5000 and it's 60K. No big deal except perhaps for ports to PalmPilots and the like...
Note that with MAXSTACK=500, you can "only" have 35 nested lists.

History
Date	User	Action	Args
2007年08月23日 13:50:57	admin	link	issue215555 messages
2007年08月23日 13:50:57	admin	create

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