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https://issues.apache.org/jira/browse/GROOVY-8338?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16325122#comment-16325122
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Jochen Theodorou commented on GROOVY-8338:
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What I fixed is the proxy generator callsite caching is using to make the
call. So as long as the call is done through the proxy it should work. Or so I
thought. the message tells me that the proxy class is loaded but incorrect. It
tells me that me fix is not applied for it actually and that this still
generates the old proxy version we still require because those people cannot
keep java9 and java8 working properly together at times. I think it depends on
the VM if it works or not.
> Calling Stream.of from groovy class in JDK 9 fails
> --------------------------------------------------
>
> Key: GROOVY-8338
> URL: https://issues.apache.org/jira/browse/GROOVY-8338
> Project: Groovy
> Issue Type: Bug
> Components: groovy-runtime
> Affects Versions: 2.4.12
> Reporter: Marcus Nylander
>
> Trying to call Stream.of from groovy class (groovy version 2.4.12) using JDK
> 9 (jdk 9 181) fails.
> Example:
> {code}
> package test
> import java.util.stream.Stream
> class B {
> static void main(String[] args) {
> Stream.of("1").forEach({ println(it) })
> }
> }
> {code}
> The code above fails with:
> Exception in thread "main" java.lang.IncompatibleClassChangeError: Method
> java.util.stream.Stream.of(Ljava/lang/Object;)Ljava/util/stream/Stream; must
> be InterfaceMethodref constant
> at java_util_stream_Stream$of.call(Unknown Source)
> at
> org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:48)
> at
> org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:113)
> at
> org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:125)
> at test.B.main(B.groovy:7)
> The same occurs for other interface static methods also:
> {code}
> public interface D {
> static D of(String s) {
> return new D() {
> };
> }
> }
> class C {
> static void main(String[] args) {
> D.of("1")
> }
> }
> {code}
> Also fails with:
> Exception in thread "main" java.lang.IncompatibleClassChangeError: Method
> test.D.of(Ljava/lang/String;)Ltest/D; must be InterfaceMethodref constant
> at test.D$of.call(Unknown Source)
> at
> org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:48)
> at
> org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:113)
> at
> org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:125)
> at test.C.main(C.groovy:7)
> Running with JDK 8 works fine.
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