Re: Incorrect behaviour between tables in luajit and lua
- From: Coda Highland <chighland@xxxxxxxxx>
- To: luajit@xxxxxxxxxxxxx
- Date: Mon, 20 Oct 2014 13:26:36 -0700
This isn't a bug at all. You're invoking undefined behavior -- # is
only well-defined for sequences, and a sequence is defined as not
containing embedded nils.
/s/ Adam
On Mon, Oct 20, 2014 at 1:17 PM, Eduardo Barthel <edub4rt@xxxxxxxxx> wrote:
> While using LuaJIT in my apps I found this bug while declaring a new table
> with "nil" value in the middle, read the following examples, while in Lua
> the output is 3 in LuajIT is 1.
>
> Lua 5.2.3 Copyright (C) 1994-2013 Lua.org, PUC-Rio
>> a = {1,nil,2}
>> print(#a)
> 3
>
> bart@archrox:~ $ lua5.1
> Lua 5.1.5 Copyright (C) 1994-2012 Lua.org, PUC-Rio
>> a = {1,nil,2}
>> print(#a)
> 3
>
> bart@archrox:~ $ luajit
> LuaJIT 2.0.3 -- Copyright (C) 2005-2014 Mike Pall. http://luajit.org/
> JIT: ON CMOV SSE2 SSE3 SSE4.1 fold cse dce fwd dse narrow loop abc sink fuse
>> a = {1,nil,2}
>> print(#a)
> 1
>
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