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On Tue, 09 Sep 2008 11:52:25 +0100
David Welch <> wrote:

> Hi,
> Just a heads up about a possible bug.  I have a lua script with:
>"%.d", 123)
> which crashes when run.  The lua version is Lua 5.1.4 which I
> downloaded from lua binaries.

This doesn't cause anything other than the expected to happen (ie,
it returns "%.d") using 5.1.2 or 5.1.4 under Ubuntu Linux, so I suspect
it may be your OS's C library treating such strings differently than

If this is a widespread issue (which OS are you on) then it may be
worth investigating adding a layer of checking of the format string to
Lua's wrapper for it.