Bad instructions

["Mahmood Naderan via gcc-help" <gcc-help@xxxxxxxxxxx>]

Hi,
With some random numbers in the first byte (out of 15 bytes) of x86 instructions, I see some bad instructions as below

4:   9a                      (bad)    
4:   c4                      (bad)   
 4:   c5 00 00                (bad) 

First byte is the prefix and I wonder why the third line is more than one byte and at the same time it is marked as bad.


Regards,
Mahmood