"INTERNAL ERROR IN FORMAT-ERROR!"

"INTERNAL ERROR IN FORMAT-ERROR!"

[Jean Abou Samra]

Hi,

The simple file

(format #f "~f" 'invalid)

gives me

FORMAT: error with call: (format #f "~f<===" ===>invalid )
         argument is not a number or a number string
FORMAT: INTERNAL ERROR IN FORMAT-ERROR!
         destination: #f
         format string: "~f"
         format args: (invalid)
         error args:  (#f "error in format" () #f)
ice-9/boot-9.scm:1685:16: In procedure raise-exception:
error in format


Is it expected to see 'INTERNAL ERROR IN FORMAT-ERROR!'?
To me, that has a meaning similar to an assertion failure.

Best,
Jean

Re: "INTERNAL ERROR IN FORMAT-ERROR!"

[Maxime Devos]

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Jean Abou Samra schreef op di 19-04-2022 om 18:52 [+0200]:
> The simple file
> 
> (format #f "~f" 'invalid)
> 
> gives me
> 
> FORMAT: error with call: (format #f "~f<===" ===>invalid )
>          argument is not a number or a number string
> FORMAT: INTERNAL ERROR IN FORMAT-ERROR!
>          destination: #f
>          format string: "~f"
>          format args: (invalid)
>          error args:  (#f "error in format" () #f)
> ice-9/boot-9.scm:1685:16: In procedure raise-exception:
> error in format
> 
> 
> Is it expected to see 'INTERNAL ERROR IN FORMAT-ERROR!'?
> To me, that has a meaning similar to an assertion failure.

Doesn't look internal to me, looks like an error at the use site of
'format'.  I think the error message can be reworded a bit to make it
clearer:

format: The format string is incompatible with the passed arguments.
         relevant part of format string: "~f"
         invalid argument: invalid
         expected: a number
         destination: #f
         format string: "~f"
         format arguments: (invalid)
         [no error args, because that would be redundant]

Greetings,
Maxime.

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