Eric:
1 was a result of a change made by choice:
https://github.com/clojure/clojure/blob/master/changes.md#210-set-and-map-constructor-functions-allow-duplicates
The ticket linked there has a link to a design page on it, which in turn has a
link to an earlier discussion thread on the Clojure group about it.
2. I'm not sure about this, but I think this was a change for ticket CLJ-157:
http://dev.clojure.org/jira/browse/CLJ-157
Given your description of it, I found it a bit funny that I categorized that
one under "Improved error messages" in the changes file. Probably time to file
a new ticket related to improving the issues you point out.
Andy
On Feb 15, 2013, at 8:12 PM, Eric Arthen wrote:
> Stu,
>
> I changed my code from 1.4.0 to 1.5.0 RC 16 (about 70 source files) and ran
> into two small things.They are probably not bugs but they confused me.
>
> I have not been following 1.5 development in detail, so these are probably
> not at all new. So far everything else seems ok, which is great.
>
> 1. array-map used to throw an illegal argument exception on duplicate keys,
> but now it succeeds and uses the last value in the array. This change seems
> okay, I just had a case that used the old behavior and it took a bit to
> realize what happened.
>
> (array-map :a 1 :a 2 :b 0 :a 3 :b 1)
> {:a 3, :b 1}
>
>
> 2. The defn macro used to be permissive when it had nothing but the function
> name, but now it complains. That seems like an improvement, but the problem
> is that it gives no information of what source file or line the problem is at
> so it took me a while to find it.
>
> I was defining a mocked out function, so I just had this: (defn x)
>
> That was okay in 1.4.0, but now it returns the error below. I just replaced
> it by (def x), so it was easy to fix once I saw it.
>
> It seems to me macro errors never tell about where in the source they happen,
> so I assume that must be very hard to fix and that we're still stuck with
> this in 1.5.0. I must admit that trying to debug macro issues (esp. in the
> 'ns' macro) are almost the only time I've found myself cursing at clojure
> itself. Most of the time it is a joy.
>
>
> Exception in thread "main" java.lang.IllegalArgumentException: Parameter
> declaration missing
> at clojure.core$assert_valid_fdecl.invoke(core.clj:6716)
> at clojure.core$sigs.invoke(core.clj:223)
> at clojure.core$defn.doInvoke(core.clj:301)
> at clojure.lang.RestFn.invoke(RestFn.java:445)
> at clojure.lang.Var.invoke(Var.java:423)
> at clojure.lang.AFn.applyToHelper(AFn.java:167)
> at clojure.lang.Var.applyTo(Var.java:532)
> at clojure.lang.Compiler.macroexpand1(Compiler.java:6468)
> at clojure.lang.Compiler.macroexpand(Compiler.java:6529)
> at clojure.lang.Compiler.eval(Compiler.java:6603)
> at clojure.lang.Compiler.load(Compiler.java:7064)
> at clojure.lang.RT.loadResourceScript(RT.java:370)
> at clojure.lang.RT.loadResourceScript(RT.java:361)
> at clojure.lang.RT.load(RT.java:440)
> at clojure.lang.RT.load(RT.java:411)
> at clojure.core$load$fn__5028.invoke(core.clj:5530)
> at clojure.core$load.doInvoke(core.clj:5529)
> at clojure.lang.RestFn.invoke(RestFn.java:408)
> at clojure.core$load_one.invoke(core.clj:5336)
> at clojure.core$load_lib$fn__4977.invoke(core.clj:5375)
> at clojure.core$load_lib.doInvoke(core.clj:5374)
> at clojure.lang.RestFn.applyTo(RestFn.java:142)
> at clojure.core$apply.invoke(core.clj:619)
> at clojure.core$load_libs.doInvoke(core.clj:5413)
> at clojure.lang.RestFn.applyTo(RestFn.java:137)
> at clojure.core$apply.invoke(core.clj:619)
> at clojure.core$require.doInvoke(core.clj:5496)
> at clojure.lang.RestFn.invoke(RestFn.java:421)
> at midje.repl$load_facts$fn__5948.invoke(repl.clj:205) <-- yes this was
> in a midje test case, but it does not tell where in my code it is
> at midje.repl$load_facts.doInvoke(repl.clj:191)
> at clojure.lang.RestFn.invoke(RestFn.java:397)
> at user$eval6011.invoke(NO_SOURCE_FILE:1)
> at clojure.lang.Compiler.eval(Compiler.java:6619)
> at clojure.lang.Compiler.eval(Compiler.java:6609)
> at clojure.lang.Compiler.eval(Compiler.java:6582)
> at clojure.core$eval.invoke(core.clj:2852)
> at clojure.main$eval_opt.invoke(main.clj:302)
> at clojure.main$initialize.invoke(main.clj:321)
> at clojure.main$null_opt.invoke(main.clj:356)
> at clojure.main$main$fn__6656.invoke(main.clj:434)
> at clojure.main$main.doInvoke(main.clj:431)
> at clojure.lang.RestFn.invoke(RestFn.java:421)
> at clojure.lang.Var.invoke(Var.java:419)
> at clojure.lang.AFn.applyToHelper(AFn.java:163)
> at clojure.lang.Var.applyTo(Var.java:532)
> at clojure.main.main(main.java:37)
> Subprocess failed
>
> -Eric
>
>
> On Wednesday, February 13, 2013 10:33:42 PM UTC-5, stuart....@gmail.com wrote:
> If you care about Clojure 1.5 compatibility for your codebase, please test it
> against RC 16 as soon as possible.
>
> You can get the source and build it yourself from [1], or wait for Maven
> Central [2] to pick up the CI build, which usually takes a few hours.
>
> Thanks!
> Stu
>
> [1] https://github.com/clojure/clojure
> [2] http://bit.ly/WEnjAi
>
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