FULL PRODUCT VERSION :
Picked up JAVA_TOOL_OPTIONS: -javaagent:/usr/share/java/jayatanaag.jar
java version "1.8.0_45"
Java(TM) SE Runtime Environment (build 1.8.0_45-b14)
Java HotSpot(TM) 64-Bit Server VM (build 25.45-b02, mixed mode)


ADDITIONAL OS VERSION INFORMATION :
Linux attila-pc 3.19.0-21-generic #21-Ubuntu SMP Sun Jun 14 18:31:11 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

A DESCRIPTION OF THE PROBLEM :
A lambda method, returning anything but not void, has 1+ parameters, passed to a method or constructor, can't invoke MethodHandle::invoke passing the lambda's parameter to MethodHandle::invoke. See the example code.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Try compiling the code specified below at the "Source code for an executable test case:" field.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
The code compiles.
ACTUAL -
The code doesn't compiles.

ERROR MESSAGES/STACK TRACES THAT OCCUR :
ant -f /home/attila/develop/TermLib -Djavac.includes=JavacBug.java -Dnb.internal.action.name=run.single -Drun.class=JavacBug run-single
init:
Deleting: /home/attila/develop/TermLib/build/built-jar.properties
deps-jar:
Updating property file: /home/attila/develop/TermLib/build/built-jar.properties
Compiling 1 source file to /home/attila/develop/TermLib/build/classes
An exception has occurred in the compiler (1.8.0_45). Please file a bug at the Java Developer Connection (http://java.sun.com/webapps/bugreport) after checking the Bug Parade for duplicates. Include your program and the following diagnostic in your report. Thank you.
java.lang.AssertionError: typecode ERROR
at com.sun.tools.javac.jvm.Code.typecode(Code.java:252)
at com.sun.tools.javac.jvm.Items$Item.coerce(Items.java:269)
at com.sun.tools.javac.jvm.Gen.genExpr(Gen.java:951)
at com.sun.tools.javac.jvm.Gen.genArgs(Gen.java:968)
at com.sun.tools.javac.jvm.Gen.visitApply(Gen.java:1909)
at com.sun.tools.javac.tree.JCTree$JCMethodInvocation.accept(JCTree.java:1465)
at com.sun.tools.javac.jvm.Gen.genExpr(Gen.java:949)
at com.sun.tools.javac.jvm.Gen.visitExec(Gen.java:1846)
at com.sun.tools.javac.tree.JCTree$JCExpressionStatement.accept(JCTree.java:1296)
at com.sun.tools.javac.jvm.Gen.genDef(Gen.java:739)
at com.sun.tools.javac.jvm.Gen.genStat(Gen.java:774)
at com.sun.tools.javac.jvm.Gen.genStat(Gen.java:760)
at com.sun.tools.javac.jvm.Gen.genStats(Gen.java:811)
at com.sun.tools.javac.jvm.Gen.visitBlock(Gen.java:1160)
at com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:909)
at com.sun.tools.javac.jvm.Gen.genDef(Gen.java:739)
at com.sun.tools.javac.jvm.Gen.genStat(Gen.java:774)
at com.sun.tools.javac.jvm.Gen.genMethod(Gen.java:1033)
at com.sun.tools.javac.jvm.Gen.visitMethodDef(Gen.java:996)
at com.sun.tools.javac.tree.JCTree$JCMethodDecl.accept(JCTree.java:778)
at com.sun.tools.javac.jvm.Gen.genDef(Gen.java:739)
at com.sun.tools.javac.jvm.Gen.genClass(Gen.java:2528)
at com.sun.tools.javac.main.JavaCompiler.genCode(JavaCompiler.java:745)
at com.sun.tools.javac.main.JavaCompiler.generate(JavaCompiler.java:1572)
at com.sun.tools.javac.main.JavaCompiler.generate(JavaCompiler.java:1536)
at com.sun.tools.javac.main.JavaCompiler.compile2(JavaCompiler.java:901)
at com.sun.tools.javac.main.JavaCompiler.compile(JavaCompiler.java:860)
at com.sun.tools.javac.main.Main.compile(Main.java:523)
at com.sun.tools.javac.main.Main.compile(Main.java:381)
at com.sun.tools.javac.main.Main.compile(Main.java:370)
at com.sun.tools.javac.main.Main.compile(Main.java:361)
at com.sun.tools.javac.Main.compile(Main.java:56)
at sun.reflect.GeneratedMethodAccessor241.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at org.apache.tools.ant.taskdefs.compilers.Javac13.execute(Javac13.java:56)
at org.apache.tools.ant.taskdefs.Javac.compile(Javac.java:1159)
at org.apache.tools.ant.taskdefs.Javac.execute(Javac.java:935)
at org.netbeans.modules.java.source.ant.JavacTask.execute(JavacTask.java:145)
at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:292)
at sun.reflect.GeneratedMethodAccessor120.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)
at org.apache.tools.ant.Task.perform(Task.java:348)
at org.apache.tools.ant.taskdefs.Sequential.execute(Sequential.java:68)
at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:292)
at sun.reflect.GeneratedMethodAccessor120.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)
at org.apache.tools.ant.Task.perform(Task.java:348)
at org.apache.tools.ant.taskdefs.MacroInstance.execute(MacroInstance.java:396)
at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:292)
at sun.reflect.GeneratedMethodAccessor120.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)
at org.apache.tools.ant.Task.perform(Task.java:348)
at org.apache.tools.ant.Target.execute(Target.java:435)
at org.apache.tools.ant.Target.performTasks(Target.java:456)
at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1393)
at org.apache.tools.ant.Project.executeTarget(Project.java:1364)
at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41)
at org.apache.tools.ant.Project.executeTargets(Project.java:1248)
at org.apache.tools.ant.module.bridge.impl.BridgeImpl.run(BridgeImpl.java:286)
at org.apache.tools.ant.module.run.TargetExecutor.run(TargetExecutor.java:555)
at org.netbeans.core.execution.RunClassThread.run(RunClassThread.java:153)
/home/attila/develop/TermLib/nbproject/build-impl.xml:949: The following error occurred while executing this line:
/home/attila/develop/TermLib/nbproject/build-impl.xml:265: Compile failed; see the compiler error output for details.
BUILD FAILED (total time: 0 seconds)


REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import java.lang.invoke.MethodHandle;

class JavacBug {

private static interface Obj2Obj {

Object run(Object obj) throws Throwable;
}

private static void m(Obj2Obj param) {
}

public static void main(String[] args) {
m((obj) -> {
MethodHandle mhandle = null;
mhandle.invoke(obj);
return null;
});
}
}

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

CUSTOMER SUBMITTED WORKAROUND :
Instead of
mhandle.invoke(obj);
use a temp variable:
Object var = obj;
mhandle.invoke(var);