drccrd opened a new issue, #6782:
URL: https://github.com/apache/incubator-kie-drools/issues/6782
**Summary:** A declared `Child extends Parent`, where `Parent` is declared
in a *different* package, generates a full-argument constructor that omits
`Parent`'s fields, so `new Child(parentFields…, childFields…)` fails to
compile. The exec model followed the declared-supertype chain only within the
current package (or into a Java superclass), not into a declared supertype in
another package.
**Reproducer:**
```drl
// parent.drl
package org.test.parentpkg;
declare Parent
name : String
age : int
end
// child.drl
package org.test.childpkg;
import org.test.parentpkg.Parent;
declare Child extends Parent
dept : String
end
rule Init when then insert( new Child("Mario", 40, "Sales") ); end
rule Chk when Child( name == "Mario", age == 40, dept == "Sales" ) then end
```
- **Expected:** both rules fire; `Child` exposes `Child(String name, int
age, String dept)`.
- **Actual:** compile error — *constructor `Child(String,int,String)` is
undefined* (only `Child(String dept)` is generated).
**Root cause:** `DescrTypeDefinition.findInheritedDeclaredFields()` resolved
inherited fields only from the current package's declared supertype or a Java
superclass; it never searched other packages' declared types, so a
cross-package declared supertype's fields were dropped.
**Suggested fix:** follow the declared-supertype chain across all packages
(base-first), then fall back to a resolvable Java superclass at the end of the
chain. This needs the build's package descriptors + `PackageRegistryManager`
passed into `DescrTypeDefinition` so each declaring package's own
supertypes/imports can be resolved (with its own `TypeResolver`).
Relates to #6779
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