diff --git a/packages/fcl-passrc/src/pasresolveeval.pas b/packages/fcl-passrc/src/pasresolveeval.pas
index 2954fd2307..cb41ef0d5c 100644
--- a/packages/fcl-passrc/src/pasresolveeval.pas
+++ b/packages/fcl-passrc/src/pasresolveeval.pas
@@ -3573,6 +3573,7 @@ begin
           sRangeCheckInSetConstructor,[],El);
         end;
       Result.Add(RangeStart,RangeEnd);
+      ReleaseEvalValue(Value);
       end;
     ok:=OnlyConstElements;
   finally
diff --git a/packages/fcl-passrc/src/pasresolver.pp b/packages/fcl-passrc/src/pasresolver.pp
index 2cab80d7f5..94d81ec3d9 100644
--- a/packages/fcl-passrc/src/pasresolver.pp
+++ b/packages/fcl-passrc/src/pasresolver.pp
@@ -7094,6 +7094,7 @@ begin
       Item:=PRangeItem(Values[i]);
       Dispose(Item);
       end;
+    Values.Free;
   end;
 end;
 
@@ -19952,13 +19953,17 @@ begin
   Range:=Eval(RangeExpr,[refConst]);
   if Range=nil then
     RaiseNotYetImplemented(20170910210416,RangeExpr);
-  case Range.Kind of
-  revkRangeInt:
-    Result:=TResEvalRangeInt(Range).RangeEnd-TResEvalRangeInt(Range).RangeStart+1;
-  revkRangeUInt:
-    Result:=TResEvalRangeUInt(Range).RangeEnd-TResEvalRangeUInt(Range).RangeStart+1;
-  else
-    RaiseNotYetImplemented(20170910210554,RangeExpr);
+  try
+    case Range.Kind of
+    revkRangeInt:
+      Result:=TResEvalRangeInt(Range).RangeEnd-TResEvalRangeInt(Range).RangeStart+1;
+    revkRangeUInt:
+      Result:=TResEvalRangeUInt(Range).RangeEnd-TResEvalRangeUInt(Range).RangeStart+1;
+    else
+      RaiseNotYetImplemented(20170910210554,RangeExpr);
+    end;
+  finally
+    ReleaseEvalValue(Range);
   end;
   {$IFDEF VerbosePasResolver}
   {AllowWriteln}
@@ -20089,7 +20094,6 @@ begin
         TResEvalRangeInt(Result).ElKind:=revskInt;
         GetIntegerRange(BaseTypeData.BaseType,
           TResEvalRangeInt(Result).RangeStart,TResEvalRangeInt(Result).RangeEnd);
-        exit;
         end;
       end;
       end;
diff --git a/packages/fcl-passrc/src/pastree.pp b/packages/fcl-passrc/src/pastree.pp
index e081e5c65b..5893ee37a9 100644
--- a/packages/fcl-passrc/src/pastree.pp
+++ b/packages/fcl-passrc/src/pastree.pp
@@ -2920,6 +2920,7 @@ begin
     TPasElement(AList[i]).Parent:=Self;
     GenericTemplateTypes.Add(AList[i]);
     end;
+  AList.Clear;
   ObjKind:=okGeneric;
 end;
 
@@ -3225,6 +3226,7 @@ begin
   ReleaseAndNil(TPasElement(PublicName){$IFDEF CheckPasTreeRefCount},'TPasProcedure.PublicName'{$ENDIF});
   ReleaseAndNil(TPasElement(LibraryExpr){$IFDEF CheckPasTreeRefCount},'TPasProcedure.LibraryExpr'{$ENDIF});
   ReleaseAndNil(TPasElement(LibrarySymbolName){$IFDEF CheckPasTreeRefCount},'TPasProcedure.LibrarySymbolName'{$ENDIF});
+  ReleaseAndNil(TPasElement(DispIDExpr){$IFDEF CheckPasTreeRefCount},'TPasProcedure.DispIDExpr'{$ENDIF});
   inherited Destroy;
 end;
 
@@ -3999,6 +4001,7 @@ begin
     TPasElement(AList[i]).Parent:=Self;
     GenericTemplateTypes.Add(AList[i]);
     end;
+  AList.Clear;
 end;
 
 procedure TPasProcedureType.GetArguments(List : TStrings);
diff --git a/packages/fcl-passrc/src/pparser.pp b/packages/fcl-passrc/src/pparser.pp
index 78745892bf..0e33b90131 100644
--- a/packages/fcl-passrc/src/pparser.pp
+++ b/packages/fcl-passrc/src/pparser.pp
@@ -3476,6 +3476,8 @@ begin
             ParseExc(nParserGenericClassOrArray,SParserGenericClassOrArray);
           end;
         finally
+          for i:=0 to List.Count-1 do
+            TPasElement(List[i]).Release{$IFDEF CheckPasTreeRefCount}('CreateElement'){$ENDIF};
           List.Free;
         end;
       end;
@@ -4058,6 +4060,7 @@ var
   NamePos: TPasSourcePos;
   OldForceCaret : Boolean;
   List : TFPList;
+  i: Integer;
 
 begin
   TypeName := CurTokenString;
@@ -4075,7 +4078,12 @@ begin
     Result:=ParseType(Parent,NamePos,TypeName,True,List);
   finally
     Scanner.SetForceCaret(OldForceCaret);
-    List.Free;
+    if List<>nil then
+      begin
+      for i:=0 to List.Count-1 do
+        TPasElement(List[i]).Release{$IFDEF CheckPasTreeRefCount}('CreateElement'){$ENDIF};
+      List.Free;
+      end;
   end;
 end;
 
@@ -5868,6 +5876,7 @@ begin
               // label mark. todo: check mark identifier in the list of labels
               El:=TPasImplLabelMark(CreateElement(TPasImplLabelMark,'', CurBlock,SrcPos));
               TPasImplLabelMark(El).LabelId:=TPrimitiveExpr(Left).Value;
+              ReleaseAndNil(TPasElement(Left){$IFDEF CheckPasTreeRefCount},'CreateElement'{$ENDIF});
               CurBlock.AddElement(El);
               CmdElem:=TPasImplLabelMark(El);
               El:=nil;
@@ -5875,7 +5884,7 @@ begin
           else
             // simple statement (function call)
             El:=TPasImplSimple(CreateElement(TPasImplSimple,'',CurBlock,SrcPos));
-            TPasImplSimple(El).expr:=Left;
+            TPasImplSimple(El).Expr:=Left;
             Left:=nil;
             AddStatement(El);
             El:=nil;