ADDITIONAL SYSTEM INFORMATION :
Windows 10 64bit, Java SE 10.0.1, building with maven 3.5.3

A DESCRIPTION OF THE PROBLEM :
When using new Java 10 feature local variable type inference, compilation fails with java.lang.AssertionError: Unexpected intersection type: java.lang.Object&java.io.Serializable&java.lang.Comparable<? extends java.lang.Object&java.io.Serializable&java.lang.Comparable<?>>

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Try to compile provided source code.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Compilation succeeds.
ACTUAL -
java.lang.AssertionError: Unexpected intersection type: java.lang.Object&java.io.Serializable&java.lang.Comparable<? extends java.lang.Object&java.io.Serializable&java.lang.Comparable<?>>
at jdk.compiler/com.sun.tools.javac.jvm.ClassWriter.enterInner(ClassWriter.java:1043)
at jdk.compiler/com.sun.tools.javac.jvm.ClassWriter$CWSignatureGenerator.classReference(ClassWriter.java:312)
at jdk.compiler/com.sun.tools.javac.code.Types$SignatureGenerator.assembleClassSig(Types.java:5182)
at jdk.compiler/com.sun.tools.javac.code.Types$SignatureGenerator.assembleSig(Types.java:5114)
at jdk.compiler/com.sun.tools.javac.jvm.ClassWriter$CWSignatureGenerator.assembleSig(ClassWriter.java:291)
at jdk.compiler/com.sun.tools.javac.code.Types$SignatureGenerator.assembleSig(Types.java:5144)
at jdk.compiler/com.sun.tools.javac.jvm.ClassWriter$CWSignatureGenerator.assembleSig(ClassWriter.java:291)
at jdk.compiler/com.sun.tools.javac.code.Types$SignatureGenerator.assembleSig(Types.java:5225)
at jdk.compiler/com.sun.tools.javac.code.Types$SignatureGenerator.assembleClassSig(Types.java:5201)
at jdk.compiler/com.sun.tools.javac.code.Types$SignatureGenerator.assembleSig(Types.java:5114)
at jdk.compiler/com.sun.tools.javac.jvm.ClassWriter$CWSignatureGenerator.assembleSig(ClassWriter.java:291)
at jdk.compiler/com.sun.tools.javac.code.Types$SignatureGenerator.assembleSig(Types.java:5225)
at jdk.compiler/com.sun.tools.javac.code.Types$SignatureGenerator.assembleClassSig(Types.java:5201)
at jdk.compiler/com.sun.tools.javac.code.Types$SignatureGenerator.assembleSig(Types.java:5114)
at jdk.compiler/com.sun.tools.javac.jvm.ClassWriter$CWSignatureGenerator.assembleSig(ClassWriter.java:291)
at jdk.compiler/com.sun.tools.javac.jvm.ClassWriter.typeSig(ClassWriter.java:334)
at jdk.compiler/com.sun.tools.javac.jvm.ClassWriter.writeCode(ClassWriter.java:1271)
at jdk.compiler/com.sun.tools.javac.jvm.ClassWriter.writeMethod(ClassWriter.java:1158)
at jdk.compiler/com.sun.tools.javac.jvm.ClassWriter.writeMethods(ClassWriter.java:1653)
at jdk.compiler/com.sun.tools.javac.jvm.ClassWriter.writeClassFile(ClassWriter.java:1761)
at jdk.compiler/com.sun.tools.javac.jvm.ClassWriter.writeClass(ClassWriter.java:1679)
at jdk.compiler/com.sun.tools.javac.main.JavaCompiler.genCode(JavaCompiler.java:749)
at jdk.compiler/com.sun.tools.javac.main.JavaCompiler.generate(JavaCompiler.java:1627)
at jdk.compiler/com.sun.tools.javac.main.JavaCompiler.generate(JavaCompiler.java:1595)
at jdk.compiler/com.sun.tools.javac.main.JavaCompiler.compile(JavaCompiler.java:965)
at jdk.compiler/com.sun.tools.javac.api.JavacTaskImpl.lambda$doCall$0(JavacTaskImpl.java:100)
at jdk.compiler/com.sun.tools.javac.api.JavacTaskImpl.handleExceptions(JavacTaskImpl.java:142)
at jdk.compiler/com.sun.tools.javac.api.JavacTaskImpl.doCall(JavacTaskImpl.java:96)
at jdk.compiler/com.sun.tools.javac.api.JavacTaskImpl.call(JavacTaskImpl.java:90)
at org.codehaus.plexus.compiler.javac.JavaxToolsCompiler.compileInProcess(JavaxToolsCompiler.java:126)
at org.codehaus.plexus.compiler.javac.JavacCompiler.performCompile(JavacCompiler.java:174)
at org.apache.maven.plugin.compiler.AbstractCompilerMojo.execute(AbstractCompilerMojo.java:1075)
at org.apache.maven.plugin.compiler.CompilerMojo.execute(CompilerMojo.java:168)
at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:137)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:208)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:154)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:146)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:117)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:81)
at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:56)
at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:128)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:305)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:192)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:105)
at org.apache.maven.cli.MavenCli.execute(MavenCli.java:956)
at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:290)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:194)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:564)
at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289)
at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229)
at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415)
at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356)
at org.codehaus.classworlds.Launcher.main(Launcher.java:47)


---------- BEGIN SOURCE ----------
import java.util.List;

public class JavacError {
    public static void main(String[] args) {
        // java.lang.AssertionError: Unexpected intersection type: java.lang.Object&java.io.Serializable&java.lang.Comparable<? extends java.lang.Object&java.io.Serializable&java.lang.Comparable<?>>
        // works with explicit type Iterable<Attribute>
        var attributes = concat(
                List.of(new IntegerAttribute()),
                List.of(new StringAttribute()));
    }

    // same signature as in guava 25.1-jre Iterables.concat()
    private static <T> Iterable<T> concat(Iterable<? extends T> a, Iterable<? extends T> b) {
        return null;
    }

    private static abstract class Attribute<T> {
    }

    private static class IntegerAttribute extends Attribute<Integer> {
    }

    private static class StringAttribute extends Attribute<String> {
    }
}

---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
Do not use local variable type inference in this situation.

FREQUENCY : always