* don't create an instance of abstract classes inside their virtual

    constructors (simply do nothing), because creating an abstract class
    is not possible in the JVM (and while the JVM only triggers an
    exception when you actually execute code that tries to create an
    abstract class, the Android platform checks this using the bytecode
    verifier at class verification time and therefore stumbled over the
    old code)

git-svn-id: branches/jvmbackend@20547 -

compiler/jvm/pjvm.pas

@@ -659,7 +659,7 @@ implementation
         symtablestack.push(pd.owner);
         { get a copy of the constructor }
         wrapperpd:=tprocdef(pd.getcopyas(procdef,pc_bareproc));
-        { this one is is a class method rather than a constructor }
+        { this one is a class method rather than a constructor }
         include(wrapperpd.procoptions,po_classmethod);
         wrapperpd.proctypeoption:=potype_function;
         wrapperpd.returndef:=tobjectdef(pd.owner.defowner);
@@ -677,9 +677,21 @@ implementation
           copy the vmt parameter from the constructor, that's different) }
         insert_self_and_vmt_para(wrapperpd);
         wrapperpd.calcparas;
-        { implementation: call through to the constructor }
-        wrapperpd.synthetickind:=tsk_callthrough;
-        wrapperpd.skpara:=pd;
+        { implementation: call through to the constructor, except in case of
+          an abstract class: then do nothing, because constructing an abstract
+          class is not possible; we still need the method definition because
+          it's used elsewhere by the compiler (it can be "overridden" by
+          child classes) }
+        if (pd.struct.typ=objectdef) and
+           (tobjectdef(pd.struct).abstractcnt=0) then
+          begin
+            wrapperpd.synthetickind:=tsk_callthrough;
+            wrapperpd.skpara:=pd;
+          end
+        else
+          begin
+            wrapperpd.synthetickind:=tsk_empty;
+          end;
         symtablestack.pop(pd.owner);
         { and now wrap this generated virtual static method itself as well }
         jvm_wrap_virtual_class_method(wrapperpd);