Fixed - thanks for the report! At Wed, 12 Jan 2011 17:15:47 +0000, Noel Welsh wrote: > A pattern like (.)? causes the following error: > > racket@> (regexp-replace* #px"(.)?" "a" (lambda args "foo")) > car: expects argument of type <pair>; given #f > > === context === > /usr/local/plt-head/collects/racket/private/string.rkt:174:7: loop > /usr/local/plt-head/collects/racket/private/string.rkt:314:11: core > /usr/local/plt-head/collects/racket/private/misc.rkt:78:7 > > > Replace the insert function with a string and it works: > > racket@> (regexp-replace* #px"(.)?" "a" "foo") > "foofoo" > > > Get rid of the ? and it works: > > racket@> (regexp-replace* #px"(.)" "a" (lambda args "foo")) > "foo" > > > I guess this has to do with constructing the args list to apply to the > insert function. > > N.
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