<div dir="ltr">What is the "custom" part of the language settings you have on?<div> Robby</div></div><div class="gmail_extra"> <div class="gmail_quote">On Tue, Jan 29, 2013 at 7:47 PM, Pierpaolo Bernardi <<a href="mailto:olopierpa@gmail.com" target="_blank">olopierpa@gmail.com</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Update 2: it does not depend on buffer content. I have 9 tab open in this DrRacket. In 5 of them happen the strange message, in 4 of them it doesn't happen. I tried closing one in which it happened and then reopening the same file in a new tab, and in the new tab it doesn't happen. 2013/1/30, Robby Findler <<a href="mailto:robby@eecs.northwestern.edu">robby@eecs.northwestern.edu</a>>: <div class="HOEnZb"><div class="h5">> I don't see that with this program: > > #lang racket > > (define (integer->roman n) > (cond ((not (integer? n)) > (raise-argument-error 'integer->roman "integer?" n)) > ((positive? n) > (apply string-append n)) > ((negative? n) > (apply string-append "NEGATIVVS " 1)) > (else > "NVLLA"))) > > Welcome to DrRacket, version 5.3.2.3--2013-01-29(32529d89/d) [3m]. > Language: racket; memory limit: 128 MB. >> (integer->roman 3.3) > . . integer->roman: contract violation > expected: integer? > given: 3.3 >> (integer->roman 3.3) > . . integer->roman: contract violation > expected: integer? > given: 3.3 >> > > > On Tue, Jan 29, 2013 at 4:33 PM, Pierpaolo Bernardi > <<a href="mailto:olopierpa@gmail.com">olopierpa@gmail.com</a>>wrote: > >> If I use raise-argument-error in my functions, like this: >> >> (define (integer->roman n) >> (cond ((not (integer? n)) >> (raise-argument-error 'integer->roman "integer?" n)) >> ((positive? n) >> (apply string-append (positive-integer->roman n))) >> ((negative? n) >> (apply string-append "NEGATIVVS " (positive-integer->roman (- >> n)))) >> (else >> "NVLLA"))) >> >> I get errors like this: >> >> Welcome to DrRacket, version 5.3.2.2--2013-01-26(88404f3/a) [3m]. >> Language: racket [custom]. >> > (integer->roman 3.3) >> integer->roman: contract violation >> expected: integer? >> given: 3.3 >> > (integer->roman 3.3) >> . . C:\Program >> Files\Racket-Full-5.3.2.2\collects\racket\private\more-scheme.rkt:263:2: >> integer->roman: contract violation >> expected: integer? >> given: 3.3 >> >> That is, from the second time on I get the extraneous prefix. Is this >> expected? >> >> P. >> >> >> _________________________ >> Racket Developers list: >> <a href="http://lists.racket-lang.org/dev" target="_blank">http://lists.racket-lang.org/dev</a> >> >> > </div></div><div class="HOEnZb"><div class="h5">-- Inviato dal mio dispositivo mobile </div></div></blockquote></div> </div>