From: Chris Hanson <org/chris-hanson/cph>
Date: Fri, 4 Jun 1993 00:15:34 +0000 (+0000)
Subject: When stack is erased by WITHIN-CONTROL-POINT, the history information
X-Git-Tag: 20090517-FFI~8364
X-Git-Url: https://birchwood-abbey.net/git?a=commitdiff_plain;h=733ca1073b3d6d19a76e2ffc6099500da20fab4a;p=mit-scheme.git

When stack is erased by WITHIN-CONTROL-POINT, the history information
stored in Prev_Restore_History_* must be reset.
---

diff --git a/v7/src/microcode/hooks.c b/v7/src/microcode/hooks.c
index e8d4af37c..400706a1a 100644
--- a/v7/src/microcode/hooks.c
+++ b/v7/src/microcode/hooks.c
@@ -1,6 +1,6 @@
 /* -*-C-*-
 
-$Id: hooks.c,v 9.50 1993/03/31 03:27:07 ziggy Exp $
+$Id: hooks.c,v 9.51 1993/06/04 00:15:34 cph Exp $
 
 Copyright (c) 1988-1993 Massachusetts Institute of Technology
 
@@ -386,6 +386,9 @@ DEFINE_PRIMITIVE ("WITHIN-CONTROL-POINT", Prim_within_control_point, 2, 2,
 
   /* This KNOWS the direction of stack growth. */
   Stack_Pointer = (Get_End_Of_Stacklet ());
+  /* We've discarded the history with the stack contents.  */
+  Prev_Restore_History_Stacklet = NULL;
+  Prev_Restore_History_Offset = 0;
   CLEAR_INTERRUPT (INT_Stack_Overflow);
 
  Will_Push (CONTINUATION_SIZE);