This patch corrects a compiler bug that caused an illegal renaming to
not be detected. In particular, it wasn't detected if the name in the
renaming is a qualified expression whose operand is a conditional
expression, and the type is a by-reference type.
Tested on x86_64-pc-linux-gnu, committed on trunk
2017-04-25 Bob Duff <d...@adacore.com>
* sem_util.adb (Is_Object_Reference): In the
case of N_Explicit_Dereference, return False if it came from a
conditional expression.
Index: sem_util.adb
===================================================================
--- sem_util.adb (revision 247137)
+++ sem_util.adb (working copy)
@@ -13548,8 +13548,14 @@
(Is_Object_Reference (Prefix (N))
or else Is_Access_Type (Etype (Prefix (N))));
+ -- An explicit dereference denotes an object, except that a
+ -- conditional expression gets turned into an explicit dereference
+ -- in some cases, and conditional expressions are not object
+ -- names.
+
when N_Explicit_Dereference =>
- return True;
+ return not Nkind_In
+ (Original_Node (N), N_If_Expression, N_Case_Expression);
-- A view conversion of a tagged object is an object reference
