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Date: Sun, 21 Sep 2014 11:16:13 +0100
From: Justin Cormack <>
Subject: Re: LUA + musl, garbage collection issue?

On Sun, Sep 21, 2014 at 5:38 AM, Rich Felker <> wrote:
> On Sat, Sep 20, 2014 at 04:41:14PM -1000, Scott Valentine wrote:
>> I noticed that in order to free memory, it basically calls realloc
>> with 0 as the new size. Is this something musl doesn't handle well?
>> I'm trying a rebuild with a check for n == 0 in musl's realloc
>> function to just free the pointer, and I'll report back.
>> What is "the right thing to do" to fix this? Should lua not be using
>> realloc to free memory, or should musl handle the case better, if,
>> in fact this is the problem?
> This is a bug in lua; it's depending on a bug in glibc. POSIX attempts

As pointed out on lua-l but not copied here, Lua is not doing this, it
does call free() in the 0 case, so something else is the issue...

(openwrt does use a patched Lua, might be worth testing with upstream).


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