[Ecls-list] Compiler tries to compile C::|compiler preprocess|

[Juan Jose Garcia Ripoll]

Goffioul Michael wrote:

>>I wanted to try out the documentation system ALBERT 
>>(http://albert.sourceforge.net).
>>When compiling the file apispec/xml-base.lisp, the compiler 
>>failed with a strange message:
>>
>>[...]
>>;;; Emitting code for XMLIFY-STRING.
>>;;; Compiling C::|compiler preprocess|.
>>;;; Error: Unable to coerce lisp object from type (NULL,:OBJECT)
>>to C/C++ type (CHARACTER,:CHAR)
>>[...]
>>    
>>
>Looking more deeply, I found a way to reproduce it:
>
>>compile nil (lambda (x) (loop for c of-type character = (schar x 0))))
>>    
>>
Also this triggers the error:

(compile nil '(lambda (x)
  (LET ((C NIL))
    (DECLARE (TYPE CHARACTER C))
    (SETQ C (SCHAR X 0))
    (print c))))

The problem is that C is declared to be of type character but it is 
initially bound with an object NIL of type NULL. ECL tries to create a C 
character variable because of the declaration, but when it reaches the 
beginning of the LET it fails.

I do not know what I should do. Maybe relax the type of the variables 
whose declarations are plain wrong?

Juanjo

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