I think this might be rehashing some old stuff, but I haven't seen
discussion on it recently and I see this behavior is still present in 1.7
so I thought I'd ask. It's the same underlying issue as
this:
http://dev.clojure.org/jira/browse/CLJ-1532?page=com.atlassian.jira.plugin.system.issuetabpanels:changehistory-tabpanel#issue-tabs
Having pr-str binding to the same *out* that's used by printing seems
dangerous - is there a more commonly accepted standard way to serialize for
edn?
We've been using Clojure in production at ReadyForZero for 4 years and
haven't encountered this, but began using a lib that uses edn, and stumbled
on unexpected behavior (described below).
Thanks guys.
ignacio
Just for other's sake, here is simplified code that demonstrates the
surprising behavior we encountered. The real code is nested several levels
and so was not as easy to spot.
EXPECTED:
app.core.redirect-service> (def _xs (map #(lg/warn (pr-str {:x "test" :y
%})) [1 2 3]))
#'app.core.redirect-service/_xs
app.core.redirect-service> _xs ;; Force evaluation
(nil nil nil)
output on log:
WARN nREPL-worker-69 20150623 220028,098
app.core.redirect-service ] {:x "test", :y 1} ;; "test" correctly printed
w/ quotes, serialized as string
WARN nREPL-worker-69 20150623 220028,099
app.core.redirect-service ] {:x "test", :y 2}
WARN nREPL-worker-69 20150623 220028,099
app.core.redirect-service ] {:x "test", :y 3}
UNEXPECTED:
app.core.redirect-service> (def _xs (map #(lg/warn (pr-str {:x "test" :y
%})) [1 2 3]))
#'app.core.redirect-service/_xs
app.core.redirect-service> (lg/warn _xs) ;; Force evaluation, but bind to
*out*
nil
output on log:
WARN nREPL-worker-69 20150623 220044,748
app.core.redirect-service ] {:x test, :y 1} ;; "test" incorrectly printed
w/out quotes, serialized as symbol
WARN nREPL-worker-69 20150623 220044,749
app.core.redirect-service ] {:x test, :y 2}
WARN nREPL-worker-69 20150623 220044,749
app.core.redirect-service ] {:x test, :y 3}
WARN nREPL-worker-69 20150623 220044,750
app.core.redirect-service ] (nil nil nil)
>>>
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