Numeric key collision related bug in Lua 5.3

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Subject: Numeric key collision related bug in Lua 5.3
From: Egor Skriptunoff <egor.skriptunoff@...>
Date: 2015年4月21日 18:32:09 +0300

Hi!

An interesting bug has been found in Lua 5.3

t = {[(1<<63)-333] = 0}
key = next(t) + 0.0
t[key] = "Lua is great!"
print(t[key]) --> Lua is great!
t[0] = "Are you sure?"
print(t[key]) --> nil

Why Lua is not great anymore?

-- Egor

Follow-Ups:
- Re: Numeric key collision related bug in Lua 5.3, Dirk Laurie
- Re: Numeric key collision related bug in Lua 5.3, Roberto Ierusalimschy

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