# HG changeset patch
# User William Astle <lost@l-w.ca>
# Date 1730789303 25200
# Node ID 000381ee2d5c98534b6beb27d70e90f56e96405b
# Parent  1ede8f8621cfb7dda3f77223455b03129f8b6fe6
Guard against single operand multiplication when detecting like terms

This *shouldn't* happen, but it apparently does in some pathological cases
so guard against a single operand multiplication to prevent a crash.

diff -r 1ede8f8621cf -r 000381ee2d5c lwlib/lw_expr.c
--- a/lwlib/lw_expr.c	Thu Aug 08 13:46:19 2024 -0600
+++ b/lwlib/lw_expr.c	Mon Nov 04 23:48:23 2024 -0700
@@ -514,8 +514,10 @@
 	if (e2 -> type == lw_expr_type_oper && e2 -> value == lw_expr_oper_times)
 	{
 		// e2 is a times
+		if (!(e2 -> operands -> next))
+			return 0; // if there aren't at least two operands
 		if (e2 -> operands -> next -> next)
-			return 0;
+			return 0; // if there is more than one operand
 		if (!lw_expr_compare(e1, e2 -> operands -> next -> p))
 			return 0;
 		return 1;