Janino does not allow casting Object to unboxed primitives

[shardulm94]

According to JLS 5.5 (going at least as far back as Java 7), we should be able to cast an Object to unboxed primitives directly.

Casting contexts allow the use of one of:
.
.
.
a narrowing reference conversion (§5.1.6) optionally followed by either an unboxing conversion (§5.1.8) or an unchecked conversion (§5.1.9)

However, Janino does not allow this while Javac does. E.g
this does not compile in Janino

java -cp janino.jar:commons-compiler.jar org.codehaus.commons.compiler.samples.ScriptDemo 'Object value = 1L; long l = (long) value;'

Exception in thread "main" org.codehaus.commons.compiler.CompileException: Line 1, Column 34: Cannot cast "java.lang.Object" to "long"
	at org.codehaus.janino.UnitCompiler.compileError(UnitCompiler.java:13228)
	at org.codehaus.janino.UnitCompiler.compileGet2(UnitCompiler.java:5311)
	at org.codehaus.janino.UnitCompiler.access$8800(UnitCompiler.java:240)
	at org.codehaus.janino.UnitCompiler$16.visitCast(UnitCompiler.java:4819)
	at org.codehaus.janino.UnitCompiler$16.visitCast(UnitCompiler.java:4800)
	at org.codehaus.janino.Java$Cast.accept(Java.java:5283)

while performing reference conversion followed by unboxing in two steps works

java -cp janino.jar:commons-compiler.jar org.codehaus.commons.compiler.samples.ScriptDemo 'Object value = 1L; long l = (long) ((Long) value);'