Ethereal-dev: Re: [Ethereal-dev] Crash filtering on proto==smb

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From: Guy Harris <gharris@xxxxxxxxx>
Date: Sat, 21 Feb 2004 00:54:42 -0800
On Sat, Feb 21, 2004 at 12:21:23AM -0800, Richard Sharpe wrote:
> If I bring up Ethereal on a capture file, and enter 'proto==smb' into the 
> filter TE, and click apply, I get the following assert:
> 
>  ./ethereal -n ~/netbench_1.cap
>  
> ** ERROR **: file ftypes.c: line 464 (fvalue_eq): assertion failed: 
> (a->ftype->cmp_eq)
> aborting...
> Abort trap (core dumped)

	proto == smb

is equivalent to

	smb == "proto"

and I guess the semantic checker in the display filter compiler
concludes that 'smb', which presumably refers to all the data in the SMB
item for the protocol tree, can be compared with a string - but the
display filter virtual machine disagrees.