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From: Pietro Gagliardi <pietro10@mac.com>
Subject: Re: [9fans] pico
Date: Tue, 29 Jan 2008 20:13:27 -0500
To: Fans of the OS Plan 9 from Bell Labs <9fans@cse.psu.edu>
Topicbox-Message-UUID: 3cbf58b6-ead3-11e9-9d60-3106f5b1d025

In this case, it only told me where the program crashed, which told  
me nothing on why (because a different line or a color image worked).

On Jan 29, 2008, at 5:46 PM, Russ Cox wrote:

>> I get something that ends in "(double-free?)" and then the program
>> crashes, but something like
>
> This usually means you have freed the same pointer twice
> or you are passing a pointer to free that was not returned
> by malloc.  If you run acid to get a stack trace to see the
> context of the free, that is often enough to identify the
> problem.
>
> % acid pid
> acid: stk()
> ...
> ^D
> %
>
> Russ
>