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From: "nicolas.boulenguez at free dot fr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ada/37110] Assert_Failure at atree.adb:886 caused by legal prefixed notation
Date: Sat, 03 Sep 2011 03:24:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37110

--- Comment #5 from nicolas.boulenguez at free dot fr 2011-09-03 03:23:36 UTC ---
-- There were two distinct bugs.

package P is
   type T1 is tagged null record;
   type T2 is tagged null record;
   function Func (Func_Formal : in T1'Class;
                  I           : in Integer)
               return access T2;
   procedure Proc (Proc_Formal : out T2);
end P;

--  This legal line causes a bug box.
--  4.4.6 (x86_64-pc-linux-gnu) Assert_Failure sinfo.adb:1149
--  4.6.1 (x86_64-pc-linux-gnu) Assert_Failure sinfo.adb:1240
with P; use P;
procedure Trigger1 is
   Actual : constant T1 := (null record);
begin
   Proc (Proc_Formal => Func (Func_Formal => Actual, I => 0).all);
end Trigger1;

--  Obsessive Obfuscated Programming on Trigger1 caused another kind of
--  bug box with 4.3 and 4.4.
--  4.4.6 (x86_64-pc-linux-gnu) Assert_Failure atree.adb:884
--  4.6.1 (x86_64-pc-linux-gnu) detects the  missing body.
with P; use P;
procedure Trigger2 is
   Actual : constant T1 := (null record);
begin
   Actual.Func (0).Proc;
end Trigger2;