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Slawomir Nowak commented on GROOVY-8338: ---------------------------------------- [~paulk] Ok, so this is what I've found so far: If you define an interface: {code} public interface InterfaceWithStaticMethod { static boolean someStaticMethod() { return true; } }{code} then this works: {code}class StaticMethodCall extends Specification { def 'static method call test'() { expect: InterfaceWithStaticMethod.someStaticMethod() } }{code} however this fails: {code}class StaticMethodCall extends Specification { def 'static method call test'() { expect: def result = InterfaceWithStaticMethod.someStaticMethod() result } }{code} with {code}java.lang.VerifyError: (class: example/app/InterfaceWithStaticMethod$someStaticMethod, method: callStatic signature: (Ljava/lang/Class;[Ljava/lang/Object;)Ljava/lang/Object;) Illegal type in constant pool at java.base/java.lang.Class.privateGetDeclaredConstructors(Class.java:3110) at java.base/java.lang.Class.getConstructor0(Class.java:3315) at java.base/java.lang.Class.getConstructor(Class.java:2108) at com.example.app.StaticMethodCall.static method call test(StaticMethodCall.groovy:9){code} Do you want me to put @CompileStatic on top of the test class? > Calling Stream.of from groovy class in JDK 9 fails > -------------------------------------------------- > > Key: GROOVY-8338 > URL: https://issues.apache.org/jira/browse/GROOVY-8338 > Project: Groovy > Issue Type: Bug > Components: groovy-runtime > Affects Versions: 2.4.12 > Reporter: Marcus Nylander > > Trying to call Stream.of from groovy class (groovy version 2.4.12) using JDK > 9 (jdk 9 181) fails. > Example: > {code} > package test > import java.util.stream.Stream > class B { > static void main(String[] args) { > Stream.of("1").forEach({ println(it) }) > } > } > {code} > The code above fails with: > Exception in thread "main" java.lang.IncompatibleClassChangeError: Method > java.util.stream.Stream.of(Ljava/lang/Object;)Ljava/util/stream/Stream; must > be InterfaceMethodref constant > at java_util_stream_Stream$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. -- This message was sent by Atlassian JIRA (v6.4.14#64029)