[Tcl-bugs] [ tcl-Bugs-2130992 ] lrepeat lacks overflow protection

[SourceForge.net <no...@so...>]

Bugs item #2130992, was opened at 2008-09-26 22:01
Message generated for change (Comment added) made by dkf
You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=110894&aid=2130992&group_id=10894

Please note that this message will contain a full copy of the comment thread,
including the initial issue submission, for this request,
not just the latest update.
Category: 17. Commands I-L
Group: current: 8.5.4
>Status: Closed
>Resolution: Fixed
Priority: 9
Private: No
Submitted By: Don Porter (dgp)
Assigned to: Donal K. Fellows (dkf)
Summary: lrepeat lacks overflow protection

Initial Comment:

% llength [lrepeat 65536 {*}[lrepeat 65536 a]]
Segmentation fault


----------------------------------------------------------------------

>Comment By: Donal K. Fellows (dkf)
Date: 2008-09-27 15:22

Message:
We perhaps ought to make the list allocator less inclined to panic() on a
failed allocation of the main array, but that's a more disruptive change.
(Added an arbitrary limit instead: [lrepeat] won't try to allocate more
than 2GB on 32-bit machines now.)

----------------------------------------------------------------------

You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=110894&aid=2130992&group_id=10894