Array of interfaces static initialization

[Yossarian]

Hello.
I've got following array:

typedef iObject[] paramList;

and following object architecture:

abstract class iObject { ... };
class associativeArray : iObject { ... };
class block : iObject { ... };
class cIrc   : block { ... };
class command : associativeArray { ... };

and have function
Run(paramList);

..

when I use (z.B.)

command c;
cIrc this;

Run([c, this]);

irc.d(278): Error: cannot implicitly convert expression (this) of type  
ghhd.irc.
cIrc to ghhd.irc.command

both command and irc could be easily upcast to iObject,
so I think that this is absolutely legal usage (bug ?), or I've badly  
understood the array initializer?

TIA

-- Yossarian
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