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https://issues.apache.org/jira/browse/GROOVY-8499?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16390571#comment-16390571
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Paul King commented on GROOVY-8499:
-----------------------------------

Yes, of course. But we need a better error message in that case.

> Glitch with native lambda support possibly relating to multiple params
> ----------------------------------------------------------------------
>
>                 Key: GROOVY-8499
>                 URL: https://issues.apache.org/jira/browse/GROOVY-8499
>             Project: Groovy
>          Issue Type: Bug
>    Affects Versions: 3.x
>            Reporter: Paul King
>            Priority: Major
>
> The following code works:
> {code}
> import groovy.transform.*
> @CompileStatic
> def method() {
>   ['ab'.chars, '12'.chars].combinations().collect{x, y -> "$x$y"}.each{ 
> println it }
> }
> method()
> {code}
> but the lambda equivalent doesn't:
> {code}
> import groovy.transform.*
> @CompileStatic
> def method() {
>   ['ab'.chars, '12'.chars].combinations().stream().map((x, y) -> 
> "$x$y").forEach{ println it }
> }
> method()
> {code}
> giving the following error:
> {noformat}
> Exception thrown
> java.lang.BootstrapMethodError: call site initialization exception
>       at java.lang.invoke.CallSite.makeSite(CallSite.java:341)
>       at 
> java.lang.invoke.MethodHandleNatives.linkCallSiteImpl(MethodHandleNatives.java:307)
>       at 
> java.lang.invoke.MethodHandleNatives.linkCallSite(MethodHandleNatives.java:297)
>       at ConsoleScript33.method(ConsoleScript33:5)
>       at ConsoleScript33.run(ConsoleScript33:9)
>       at 
> groovy.lang.GroovyShell.runScriptOrMainOrTestOrRunnable(GroovyShell.java:265)
>       at groovy.lang.GroovyShell.run(GroovyShell.java:378)
>       at groovy.lang.GroovyShell.run(GroovyShell.java:357)
>       at groovy.lang.GroovyShell.run(GroovyShell.java:173)
>       at groovy.lang.GroovyShell$run$0.call(Unknown Source)
>       at 
> groovy.ui.Console$_runScriptImpl_closure18.doCall(Console.groovy:1118)
>       at groovy.ui.Console$_runScriptImpl_closure18.doCall(Console.groovy)
>       at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>       at 
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
>       at 
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>       at java.lang.reflect.Method.invoke(Method.java:498)
>       at 
> org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:103)
>       at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:325)
>       at 
> org.codehaus.groovy.runtime.metaclass.ClosureMetaClass.invokeMethod(ClosureMetaClass.java:264)
>       at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1037)
>       at groovy.lang.Closure.call(Closure.java:419)
>       at groovy.lang.Closure.call(Closure.java:413)
>       at groovy.lang.Closure.run(Closure.java:500)
>       at java.lang.Thread.run(Thread.java:748)
> Caused by: java.lang.invoke.LambdaConversionException: Incorrect number of 
> parameters for instance method invokeVirtual 
> ConsoleScript33$_method_lambda1.doCall:(ConsoleScript33,Object,Object)Object; 
> 2 captured parameters, 1 functional interface method parameters, 3 
> implementation parameters
>       at 
> java.lang.invoke.AbstractValidatingLambdaMetafactory.validateMetafactoryArgs(AbstractValidatingLambdaMetafactory.java:193)
>       at 
> java.lang.invoke.LambdaMetafactory.metafactory(LambdaMetafactory.java:303)
>       at java.lang.invoke.CallSite.makeSite(CallSite.java:302)
>       ... 23 more
> {noformat}



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