[ ghc-Bugs-1231648 ] compiler panic when class name is used as a type

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Bugs item #1231648, was opened at 2005-07-02 16:24
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Category: Compiler
Group: 6.4
Status: Open
Resolution: None
Priority: 5
Submitted By: Nobody/Anonymous (nobody)
Assigned to: Nobody/Anonymous (nobody)
Summary: compiler panic when class name is used as a type

Initial Comment:
The compiler panics with a message "the `impossible'    
happened" when compiling the following:    
    
class Foo where    
  bar :: Foo    
 
It seems to happen whenever the class name is used   
as a type within its own `where' clause.  This should  
yield a more comprehensible error message.  
  
I can be reached at vnkwjyc02 at sneakemail.com  

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