Dim Byref: Require an initializer

src/compiler/error.bas

@@ -400,7 +400,8 @@ declare function hMakeParamDesc _
 		@"Byref function result not set", _
 		@"Function result assignment outside of the function", _
 		@"Type mismatch in byref function result assignment", _
-		@"-asm att|intel option given, but not supported for this target (only x86 or x86_64)" _
+		@"-asm att|intel option given, but not supported for this target (only x86 or x86_64)", _
+		@"Reference not initialized" _
 	}
 
 

src/compiler/error.bi

@@ -322,6 +322,7 @@ enum FB_ERRMSG
 	FB_ERRMSG_RESULTASSIGNOUTSIDEFUNCTION
 	FB_ERRMSG_TYPEMISMATCHINBYREFRESULTASSIGN
 	FB_ERRMSG_ASMOPTIONGIVENFORNONX86
+	FB_ERRMSG_MISSINGREFINIT
 
 	FB_ERRMSGS
 end enum

src/compiler/parser-decl-var.bas

@@ -1608,6 +1608,12 @@ function cVarDecl _
 					end if
 				end if
 			else
+				if( symbIsRef( sym ) ) then
+					errReport( FB_ERRMSG_MISSINGREFINIT )
+					hSkipStmt( )
+					exit function
+				end if
+
 				'' default initialization
 				if( sym ) then
 					if( symbArrayHasUnknownBounds( sym ) ) then

todo.txt

@@ -1,6 +1,6 @@
 o Dim Byref
   - Var Byref
-  - initializer required; same checks as for byref result assignments
+  - check initializer as for byref result assignments
   - ref var's real dtype = pointer, matters at least when emitting/allocating
   - implicit deref on access like for byref params
   - extend temp var life-time like WITH