Eric Milles created GROOVY-9760:
-----------------------------------
Summary: NPE when trait with type parameter is implemented as raw
type
Key: GROOVY-9760
URL: https://issues.apache.org/jira/browse/GROOVY-9760
Project: Groovy
Issue Type: Bug
Reporter: Eric Milles
Assignee: Eric Milles
Consider the following:
{code:groovy}
class C implements T {
static main(args) {
new C().one
}
}
trait T<X> {
X getOne() {}
}
{code}
No type argument is supplied to T when C implements it. Therefore, the method
{{getOne()}} is written out with an unresolved type param in its signature.
{noformat}
Exception in thread "main" java.lang.NullPointerException
at com.sun.beans.TypeResolver.resolve(TypeResolver.java:203)
at com.sun.beans.TypeResolver.resolveInClass(TypeResolver.java:81)
at
java.beans.FeatureDescriptor.getReturnType(FeatureDescriptor.java:370)
at java.beans.Introspector.getTargetEventInfo(Introspector.java:1052)
at java.beans.Introspector.getBeanInfo(Introspector.java:427)
at java.beans.Introspector.getBeanInfo(Introspector.java:173)
at
groovy.lang.MetaClassImpl.lambda$addProperties$4(MetaClassImpl.java:3416)
at java.security.AccessController.doPrivileged(Native Method)
at groovy.lang.MetaClassImpl.addProperties(MetaClassImpl.java:3416)
at groovy.lang.MetaClassImpl.initialize(MetaClassImpl.java:3397)
at
org.codehaus.groovy.reflection.ClassInfo.getMetaClassUnderLock(ClassInfo.java:273)
at
org.codehaus.groovy.reflection.ClassInfo.getMetaClass(ClassInfo.java:315)
at
org.codehaus.groovy.runtime.metaclass.MetaClassRegistryImpl.getMetaClass(MetaClassRegistryImpl.java:258)
at
org.codehaus.groovy.runtime.InvokerHelper.getMetaClass(InvokerHelper.java:987)
at
org.codehaus.groovy.runtime.callsite.CallSiteArray.createCallConstructorSite(CallSiteArray.java:82)
at
org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCallConstructor(CallSiteArray.java:59)
at
org.codehaus.groovy.runtime.callsite.AbstractCallSite.callConstructor(AbstractCallSite.java:263)
at
org.codehaus.groovy.runtime.callsite.AbstractCallSite.callConstructor(AbstractCallSite.java:268)
{noformat}
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