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[Ada] Crash on entry call with preconditions and access parameters

Message ID 20140801133530.GA12281@adacore.com
State New
Headers show

Commit Message

Arnaud Charlet Aug. 1, 2014, 1:35 p.m. UTC 
When an entry has preconditions, the entry call is wrapped in a procedure call
that incorporates the precondition checks. To prevent a double expansion, with
possible duplication of extra formals, that procedure call must only be pre-
nalyzed and resolved. Expansion takes place upon return to the caller
Resolve_Call.

No short example available.

Tested on x86_64-pc-linux-gnu, committed on trunk

2014-08-01  Ed Schonberg  <schonberg@adacore.com>

	* sem_res.adb (Resolve_Entry_Call): When an entry has
	preconditions, the entry call is wrapped in a procedure call
	that incorporates the precondition checks. To prevent a double
	expansion, with possible duplication of extra formals, that
	procedure call must only be pre-analyzed and resolved. Expansion
	takes place upon return to the caller Resolve_Call.
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Patch

Index: sem_res.adb
===================================================================
--- sem_res.adb	(revision 213460)
+++ sem_res.adb	(working copy)
@@ -7176,7 +7176,11 @@ 
                   New_Occurrence_Of (PPC_Wrapper (Nam), Loc),
                 Parameter_Associations => New_Actuals);
             Rewrite (N, New_Call);
-            Analyze_And_Resolve (N);
+
+            --  Preanalyze and resolve new call. Current procedure is called
+            --  from Resolve_Call, after which expansion will take place.
+
+            Preanalyze_And_Resolve (N);
             return;
          end;
       end if;