Here's a minimal repro case:

user=> (defn foo ^long [] 1)
#'user/foo
user=> (Integer/bitCount ^int (foo))
VerifyError (class: user$eval13, method: invokeStatic signature: 
()Ljava/lang/Object;) Expecting to find integer on stack  
java.lang.Class.getDeclaredConstructors0 (Class.java:-2)


> On 11 Nov 2015, at 07:46, Shantanu Kumar <kumar.shant...@gmail.com> wrote:
> 
> One of my libraries (https://github.com/kumarshantanu/asphalt) is failing to 
> compile with 1.8 (works fine with 1.6, 1.7); the stack trace is below:
> 
> $ lein do clean, with-profile dev,c18 test
> Exception in thread "main" java.lang.VerifyError: (class: 
> asphalt/core$invoke_with_transaction, method: invokeStatic signature: 
> (Ljava/lang/Object;Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;) 
> Expecting to find integer on stack, compiling:(core.clj:201:1)
>       at clojure.lang.Compiler$DefExpr.eval(Compiler.java:463)
>       at clojure.lang.Compiler.eval(Compiler.java:6918)
>       at clojure.lang.Compiler.load(Compiler.java:7360)
>       at clojure.lang.RT.loadResourceScript(RT.java:372)
>       at clojure.lang.RT.loadResourceScript(RT.java:363)
>       at clojure.lang.RT.load(RT.java:453)
>       at clojure.lang.RT.load(RT.java:419)
>       at clojure.core$load$fn__5673.invoke(core.clj:5895)
>       at clojure.core$load.invokeStatic(core.clj:5894)
>       at clojure.core$load_one.invokeStatic(core.clj:5694)
>       at clojure.core$load_one.invoke(core.clj)
>       at clojure.core$load_lib$fn__5622.invoke(core.clj:5739)
>       at clojure.core$load_lib.invokeStatic(core.clj:5738)
>       at clojure.core$load_lib.doInvoke(core.clj)
>       at clojure.lang.RestFn.applyTo(RestFn.java:142)
>       at clojure.core$apply.invokeStatic(core.clj:647)
>       at clojure.core$load_libs.invokeStatic(core.clj:5776)
>       at clojure.core$load_libs.doInvoke(core.clj)
>       at clojure.lang.RestFn.applyTo(RestFn.java:137)
>       at clojure.core$apply.invokeStatic(core.clj:647)
>       at clojure.core$require.invokeStatic(core.clj:5798)
>       at clojure.core$require.doInvoke(core.clj)
>       at clojure.lang.RestFn.invoke(RestFn.java:457)
>       at 
> asphalt.test_util$eval198$loading__5565__auto____199.invoke(test_util.clj:1)
>       at asphalt.test_util$eval198.invokeStatic(test_util.clj:1)
>       at asphalt.test_util$eval198.invoke(test_util.clj)
>       at clojure.lang.Compiler.eval(Compiler.java:6913)
>       at clojure.lang.Compiler.eval(Compiler.java:6902)
>       at clojure.lang.Compiler.load(Compiler.java:7360)
>       at clojure.lang.RT.loadResourceScript(RT.java:372)
>       at clojure.lang.RT.loadResourceScript(RT.java:363)
>       at clojure.lang.RT.load(RT.java:453)
>       at clojure.lang.RT.load(RT.java:419)
>       at clojure.core$load$fn__5673.invoke(core.clj:5895)
>       at clojure.core$load.invokeStatic(core.clj:5894)
>       at clojure.core$load_one.invokeStatic(core.clj:5694)
>       at clojure.core$load_one.invoke(core.clj)
>       at clojure.core$load_lib$fn__5622.invoke(core.clj:5739)
>       at clojure.core$load_lib.invokeStatic(core.clj:5738)
>       at clojure.core$load_lib.doInvoke(core.clj)
>       at clojure.lang.RestFn.applyTo(RestFn.java:142)
>       at clojure.core$apply.invokeStatic(core.clj:647)
>       at clojure.core$load_libs.invokeStatic(core.clj:5776)
>       at clojure.core$load_libs.doInvoke(core.clj)
>       at clojure.lang.RestFn.applyTo(RestFn.java:137)
>       at clojure.core$apply.invokeStatic(core.clj:647)
>       at clojure.core$require.invokeStatic(core.clj:5798)
>       at clojure.core$require.doInvoke(core.clj)
>       at clojure.lang.RestFn.invoke(RestFn.java:457)
>       at 
> asphalt.core_test$eval192$loading__5565__auto____193.invoke(core_test.clj:1)
>       at asphalt.core_test$eval192.invokeStatic(core_test.clj:1)
>       at asphalt.core_test$eval192.invoke(core_test.clj)
>       at clojure.lang.Compiler.eval(Compiler.java:6913)
>       at clojure.lang.Compiler.eval(Compiler.java:6902)
>       at clojure.lang.Compiler.load(Compiler.java:7360)
>       at clojure.lang.RT.loadResourceScript(RT.java:372)
>       at clojure.lang.RT.loadResourceScript(RT.java:363)
>       at clojure.lang.RT.load(RT.java:453)
>       at clojure.lang.RT.load(RT.java:419)
>       at clojure.core$load$fn__5673.invoke(core.clj:5895)
>       at clojure.core$load.invokeStatic(core.clj:5894)
>       at clojure.core$load_one.invokeStatic(core.clj:5694)
>       at clojure.core$load_one.invoke(core.clj)
>       at clojure.core$load_lib$fn__5622.invoke(core.clj:5739)
>       at clojure.core$load_lib.invokeStatic(core.clj:5738)
>       at clojure.core$load_lib.doInvoke(core.clj)
>       at clojure.lang.RestFn.applyTo(RestFn.java:142)
>       at clojure.core$apply.invokeStatic(core.clj:647)
>       at clojure.core$load_libs.invokeStatic(core.clj:5776)
>       at clojure.core$load_libs.doInvoke(core.clj)
>       at clojure.lang.RestFn.applyTo(RestFn.java:137)
>       at clojure.core$apply.invokeStatic(core.clj:647)
>       at clojure.core$require.invokeStatic(core.clj:5798)
>       at clojure.core$require.doInvoke(core.clj)
>       at clojure.lang.RestFn.applyTo(RestFn.java:137)
>       at clojure.core$apply.invokeStatic(core.clj:647)
>       at clojure.core$apply.invoke(core.clj)
>       at user$eval91.invokeStatic(form-init7505432955041312280.clj:1)
>       at user$eval91.invoke(form-init7505432955041312280.clj)
>       at clojure.lang.Compiler.eval(Compiler.java:6913)
>       at clojure.lang.Compiler.eval(Compiler.java:6903)
>       at clojure.lang.Compiler.load(Compiler.java:7360)
>       at clojure.lang.Compiler.loadFile(Compiler.java:7298)
>       at clojure.main$load_script.invokeStatic(main.clj:275)
>       at clojure.main$init_opt.invokeStatic(main.clj:277)
>       at clojure.main$init_opt.invoke(main.clj)
>       at clojure.main$initialize.invokeStatic(main.clj:308)
>       at clojure.main$null_opt.invokeStatic(main.clj:342)
>       at clojure.main$null_opt.invoke(main.clj)
>       at clojure.main$main.invokeStatic(main.clj:421)
>       at clojure.main$main.doInvoke(main.clj)
>       at clojure.lang.RestFn.invoke(RestFn.java:421)
>       at clojure.lang.Var.invoke(Var.java:383)
>       at clojure.lang.AFn.applyToHelper(AFn.java:156)
>       at clojure.lang.Var.applyTo(Var.java:700)
>       at clojure.main.main(main.java:37)
> Caused by: java.lang.VerifyError: (class: 
> asphalt/core$invoke_with_transaction, method: invokeStatic signature: 
> (Ljava/lang/Object;Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;) 
> Expecting to find integer on stack
>       at java.lang.Class.getDeclaredConstructors0(Native Method)
>       at java.lang.Class.privateGetDeclaredConstructors(Class.java:2671)
>       at java.lang.Class.getConstructor0(Class.java:3075)
>       at java.lang.Class.newInstance(Class.java:412)
>       at clojure.lang.Compiler$ObjExpr.eval(Compiler.java:4902)
>       at clojure.lang.Compiler$DefExpr.eval(Compiler.java:450)
>       ... 95 more
> 
> I welcome any suggestion/pointers on preparing an isolated test case.
> 
> Shantanu
> 
> On Tuesday, 10 November 2015 23:00:47 UTC+5:30, Alex Miller wrote:
> Clojure 1.8.0-RC1 is now available. This build is a "release candidate"! We 
> would appreciate any and all testing you can do on your own libraries or 
> internal projects to find problems. If no problems are found, we expect to 
> make this the 1.8.0 final release! 
> 
> Try it via
> Download: https://repo1.maven.org/maven2/org/clojure/clojure/1.8.0-RC1 
> <https://repo1.maven.org/maven2/org/clojure/clojure/1.8.0-RC1>
> Leiningen: [org.clojure/clojure "1.8.0-RC1"]
> Below is the only change since 1.8.0-beta2. See the full 1.8 change log here: 
> https://github.com/clojure/clojure/blob/master/changes.md 
> <https://github.com/clojure/clojure/blob/master/changes.md>.
> CLJ-1845 <http://dev.clojure.org/jira/browse/CLJ-1845> Make clojure.core/load 
> dynamic so it can be redef'ed even with direct linking
> 
> 
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