[GROOVY-10056] Inferred parameter type of lambda expression for multi-dimensions array is not correct

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 4.0.0-alpha-3
• Fix Version/s: 4.0.0-beta-1, 3.0.9
• Component/s: Static compilation, Static Type Checker
• Assignee: Daniel Sun
• Reporter: Daniel Sun
• Created: 24/Apr/21 13:11
• Updated: 03/Feb/22 22:34
• Resolved: 26/Apr/21 12:43

Description

The type of strs is inferred as String, but its type should be String[]

@groovy.transform.CompileStatic
def test() {
    String[][] strsArray = new String[][] {
        new String[] {'a', 'b', 'c'},
        new String[] {'d', 'e', 'f'}
    }
    Arrays.stream(strsArray)
                .limit(1)
                .forEach(strs -> {
                    assert ['a', 'b', 'c'] == Arrays.asList(strs)
                })
}
test()

Error message

java.lang.ClassCastException: class [Ljava.lang.String; cannot be cast to class java.lang.String ([Ljava.lang.String; and java.lang.String are in module java.base of loader 'bootstrap')

	at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183)

	at java.base/java.util.stream.SliceOps$1$1.accept(SliceOps.java:199)

	at java.base/java.util.Spliterators$ArraySpliterator.tryAdvance(Spliterators.java:958)

	at java.base/java.util.stream.ReferencePipeline.forEachWithCancel(ReferencePipeline.java:127)

	at java.base/java.util.stream.AbstractPipeline.copyIntoWithCancel(AbstractPipeline.java:502)

	at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:488)

	at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474)

	at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150)

	at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173)

	at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)

	at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497)

	at ConsoleScript3.test(ConsoleScript3:7)

	at org.codehaus.groovy.vmplugin.v8.IndyInterface.fromCache(IndyInterface.java:318)

	at ConsoleScript3.run(ConsoleScript3:13)

	at groovy.lang.GroovyShell.runScriptOrMainOrTestOrRunnable(GroovyShell.java:257)

	at groovy.lang.GroovyShell.run(GroovyShell.java:363)

	at groovy.lang.GroovyShell.run(GroovyShell.java:342)

	at groovy.lang.GroovyShell.run(GroovyShell.java:168)

	at groovy.console.ui.Console$GroovySourceType.run(Console.groovy:1177)

	at groovy.console.ui.Console.doRun(Console.groovy:1408)

	at jdk.internal.reflect.GeneratedMethodAccessor81.invoke(Unknown Source)

	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

	at java.base/java.lang.reflect.Method.invoke(Method.java:566)

	at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:112)

	at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:325)

	at org.codehaus.groovy.runtime.metaclass.ClosureMetaClass.invokeMethod(ClosureMetaClass.java:331)

	at org.codehaus.groovy.runtime.callsite.PogoMetaClassSite.callCurrent(PogoMetaClassSite.java:63)

	at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:203)

	at groovy.console.ui.Console$_runScriptImpl_closure23.doCall(Console.groovy:1372)

	at groovy.console.ui.Console$_runScriptImpl_closure23.doCall(Console.groovy)

	at jdk.internal.reflect.GeneratedMethodAccessor78.invoke(Unknown Source)

	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

	at java.base/java.lang.reflect.Method.invoke(Method.java:566)

	at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:112)

	at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:325)

	at org.codehaus.groovy.runtime.metaclass.ClosureMetaClass.invokeMethod(ClosureMetaClass.java:268)

	at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1034)

	at groovy.lang.Closure.call(Closure.java:419)

	at groovy.lang.Closure.call(Closure.java:413)

	at groovy.lang.Closure.run(Closure.java:501)

	at java.base/java.lang.Thread.run(Thread.java:834)