The component of the IBUFG you have declared in the testbench does not 
precisely match the IBUFG entity. The ports are std_logic and std_ulogic. I've 
had some problems in the past with this, causing exactly the behavior you see. 
Whether it's a GHDL thing or a VHDL thing I don't know.



Regards, 
Kevin 


Date: Tue, 30 Nov 2010 22:20:07 +0100
From: [email protected]
To: [email protected]
Subject: [Ghdl-discuss] Simple line simulation

  Hallo,
 
I have a problem or a bug or what ever. Now I have reduced to the 
smallest code.
The reproducer is in the attachment.
 
In my code I have a simple  connection from input to output.
The amazing is the signal output is correct but the signal o in the 
instance is undefined.
The signal o and output are the same but I get different waves??!
 
René
 
 
 

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