Thursday afternoon teaser
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- Subject: Thursday afternoon teaser
- From: Rob Kendrick <rjek@...>
- Date: 2013年1月31日 13:19:47 +0000
In the command-line REPL, execute the following:
setmetatable(_G,{__index=os.getenv})
In my caffeine-deprived state, I am at a loss to explain what happens:
rjek@octopus:~$ lua
Lua 5.1.4 Copyright (C) 1994-2008 Lua.org, PUC-Rio
> setmetatable(_G,{__index=os.getenv})
bad argument #1 to '?' (string expected, got table)
rjek@octopus:~$ echo $?
1
rjek@octopus:~$
B.