JDK-7016250 : JSR 292 Raw retypes and return type conversions are needed
- Type: Bug
- Component: hotspot
- Sub-Component: compiler
- Affected Version: hs20
- Priority: P3
- Status: Closed
- Resolution: Duplicate
- OS: generic
- CPU: generic
- Submitted: 2011-02-01
- Updated: 2012-02-01
- Resolved: 2011-05-13
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| JDK 7 |
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7Resolved  |
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Duplicate :
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Description
When invokedynamic instruction or MethodHandles.convertArguments() needs to convert between primary types, an exception like the one below is thrown:
Exception in thread "main" java.lang.ClassCastException: java.lang.Boolean cannot be cast to java.lang.Byte
at sun.dyn.util.ValueConversions.unboxByte(ValueConversions.java:61)
at sun.dyn.util.ValueConversions.unboxByteRaw(ValueConversions.java:98)
at sun.dyn.ToGeneric$Adapter.return_I(ToGeneric.java:393)
at sun.dyn.ToGeneric$A1.invoke_I(ToGeneric.java:643)
A short test case for this:
import java.dyn.*;
public class R {
public static void main(String... args) throws Throwable {
MethodHandle mh1 = MethodHandles.identity(int.class);
MethodHandle mh2 = MethodHandles.convertArguments(mh1, MethodType.methodType(short.class, int.class));
short s = (short) mh2.invokeExact(123);
}
}
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