Issue 406 in groovypptest: Trivial closure example - fails to compile

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Feb 6, 2012, 11:06:06 AM2/6/12

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Status: New
Owner: ----
Labels: Type-Defect Priority-Medium

New issue 406 by smend...@gmail.com: Trivial closure example - fails to
compile
http://code.google.com/p/groovypptest/issues/detail?id=406

The following program:

@Typed(TypePolicy.STATIC)
class Test {
static void main(String[] args) {
def lt = { int a, int b -> (a < b)}
println( lt(2,3))
}
}

Compiled and run thus:
groovy -cp gpp.jar ClosureTest.groovy

Generates this error:
org.codehaus.groovy.control.MultipleCompilationErrorsException: startup
failed:
C:\Users\smendola\Home\groovy\ClosureTest.groovy: 4: A transform used a
generics containing ClassNode groovy.lang.Closure <V extends
java.lang.Object -> java.lang.Object> for the super class Test$main$1
directly. You are not suppposed to do this. Please create a new ClassNode
refering to the old ClassNode and use the new ClassNode instead of the old
one. Otherwise the compiler will create wrong descriptors and a potential
NullPointerException in TypeResolver in the OpenJDK. If this is not your
own doing, please report this bug to the writer of the transform.
@ line 4, column 12.
def lt = { int a, int b -> (a < b)}
^

1 error

Changing STATIC back to DYNAMIC, program compiles, runs, and generated
expected output:

$ groovy -cp gpp.jar ClosureTest.groovy
true

$ groovy -version
Groovy Version: 1.8.5 JVM: 1.6.0_25 Vendor: Sun Microsystems Inc. OS:
Windows 7

GPP version:
ImplementationVersion=0.9.0
BuildDate=05-Sep-2011
BuildTime=11:54 PM

If the program needs to be modified in order to be valid Groovy++ STATIC,
that's fine (grateful if you could post corrected code). However, the
compile time error that is shown above is inappropriate, and suggests a bug
in G++, rather than in the program.