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[Bug-apl] Safe mode is not so safe

From: Elias Mårtenson
Subject: [Bug-apl] Safe mode is not so safe
Date: Wed, 29 Mar 2017 12:21:29 +0800

I'm implementing an IRC bot that can run arbitrary APL expressions. Since this bot can run code submitted by anyone, I need to ensure that the code can't affect the system where the APL expressions are executed.

This is the purpose of the --safe flag, but I have noted that several destructive operations are still permitted when using this flag.

In particular:

There is probably more, but preventing these would be a good start.


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