'lein check' fails with odd error message

[jafingerhut]

I tried with Leiningen 2.5.0, and get the same behavior for Clojure 1.5.1, 1.6.0, and 1.7.0-alpha3. I haven't tracked down the cause of this yet, but wanted to create an issue for it in case someone figures it out. Perhaps the type hints for AutoFlattenSeq should have fully qualified names?

% lein with-profile +1.7 do clean, check
Compiling namespace instaparse.abnf
Compiling namespace instaparse.auto-flatten-seq
Compiling namespace instaparse.cfg
Compiling namespace instaparse.clone
Compiling namespace instaparse.combinators
Compiling namespace instaparse.combinators-source
Compiling namespace instaparse.core
Reflection warning, rhizome/viz.clj:72:6 - call to static method write on javax.imageio.ImageIO can't be resolved (argument types: unknown, unknown, java.io.File).
Exception in thread "main" java.lang.ClassCastException: instaparse.auto_flatten_seq.AutoFlattenSeq cannot be cast to instaparse.auto_flatten_seq.AutoFlattenSeq, compiling:(core.clj:248:14)
at clojure.lang.Compiler$InvokeExpr.eval(Compiler.java:3602)

[... many stack trace lines elided here ... ]

Caused by: java.lang.ClassCastException: instaparse.auto_flatten_seq.AutoFlattenSeq cannot be cast to instaparse.auto_flatten_seq.AutoFlattenSeq
at instaparse.auto_flatten_seq$hash_cat.invokePrim(auto_flatten_seq.clj:149)
at instaparse.auto_flatten_seq$hash_cat.invoke(auto_flatten_seq.clj)
at instaparse.auto_flatten_seq.AutoFlattenSeq.conj_flat(auto_flatten_seq.clj:111)

[Engelberg]

Apologies for my naivete, but what does "lein check" do?

[jafingerhut]

It simply compiles the files in your :source-paths (which is ["src"] by default in Leiningen if you don't override it) and their subdirectories, with reflection warnings enabled.

It isn't necessarily a bug that this gives an error, but it is odd, and maybe worth investigating the cause, if it isn't difficult to determine.

[mishadoff]

This is, actually, a clojure related bug. See http://dev.clojure.org/jira/browse/CLJ-979
Fix is planned in 1.7-alpha5

[Engelberg]

Glad to hear this is being fixed. I'll close out this issue, then.

[jafingerhut]

I still see the same error with the same command for Leiningen version 2.5.0, Java 1.7.0_45, on Mac OS X 10.9.5 and Clojure 1.7.0-alpha5.