The frontend crashes processing an expression function defined
in the body of protected type that depends on discriminants.
Tested on x86_64-pc-linux-gnu, committed on trunk
gcc/ada/
* sem_ch8.adb (Find_Direct_Name): Do not trust in the decoration
of the Entity attribute in constants associated with
discriminals of protected types.diff --git a/gcc/ada/sem_ch8.adb b/gcc/ada/sem_ch8.adb
--- a/gcc/ada/sem_ch8.adb
+++ b/gcc/ada/sem_ch8.adb
@@ -5627,6 +5627,21 @@ package body Sem_Ch8 is
if Is_Type (Entity (N)) then
Set_Etype (N, Entity (N));
+ -- The exception to this general rule are constants associated with
+ -- discriminals of protected types because for each protected op
+ -- a new set of discriminals is internally created by the frontend
+ -- (see Exp_Ch9.Set_Discriminals), and the current decoration of the
+ -- entity pointer may have been set as part of a preanalysis, where
+ -- discriminals still reference the first subprogram or entry to be
+ -- expanded (see Expand_Protected_Body_Declarations).
+
+ elsif Full_Analysis
+ and then Ekind (Entity (N)) = E_Constant
+ and then Present (Discriminal_Link (Entity (N)))
+ and then Is_Protected_Type (Scope (Discriminal_Link (Entity (N))))
+ then
+ goto Find_Name;
+
else
declare
Entyp : constant Entity_Id := Etype (Entity (N));
@@ -5667,6 +5682,8 @@ package body Sem_Ch8 is
return;
end if;
+ <<Find_Name>>
+
-- Preserve relevant elaboration-related attributes of the context which
-- are no longer available or very expensive to recompute once analysis,
-- resolution, and expansion are over.
