# HG changeset patch
# User William Astle <lost@l-w.ca>
# Date 1339359004 21600
# Node ID 398773d7e50463a6c6fb1142c665cfb3d05dd132
# Parent  5330ba70836a42e5eb998d6aae2ed13e5005fe33
Fix crash bug on indexed expression handling

Fix NULL pointer deref when simplifying an expression in indexed mode. This
fix should eliminate all similar crash bugs.

diff -r 5330ba70836a -r 398773d7e504 lwasm/lwasm.c
--- a/lwasm/lwasm.c	Sun Jun 10 13:29:23 2012 -0600
+++ b/lwasm/lwasm.c	Sun Jun 10 14:10:04 2012 -0600
@@ -662,7 +662,8 @@
 
 int lwasm_reduce_expr(asmstate_t *as, lw_expr_t expr)
 {
-	lw_expr_simplify(expr, as);
+	if (expr)
+		lw_expr_simplify(expr, as);
 	return 0;
 }