From f3f3069f542bb8199921c8affee413a7e2fb2397 Mon Sep 17 00:00:00 2001
From: sater <devnull@localhost>
Date: Thu, 28 Jun 1984 10:40:09 +0000
Subject: [PATCH] Fixed bug: after BRA instruction was optimized away the
 variable lastbra pointed to the instruction following. This could lead to
 anything, including bus errors. Lastbra is now reset to 0. Bug discovered at
 Philips PMDS by Hans de Vries. The fix is also his. Actually the function
 cleaninstr should be rewritten.

---
 util/opt/flow.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/util/opt/flow.c b/util/opt/flow.c
index 2f7d79ad..b83c39bd 100644
--- a/util/opt/flow.c
+++ b/util/opt/flow.c
@@ -97,6 +97,7 @@ cleaninstrs() {
 					OPTIM(O_BRALAB);
 					lpp = lastbra;
 					*lpp = lp;
+					lastbra = (line_p *) 0;
 					lp->l_a.la_np->n_jumps--;
 				}
 			}