From d13019290ee2e7f41369f1d31ce903efd26cfd05 Mon Sep 17 00:00:00 2001
From: Michael Forney <mforney@mforney.org>
Date: Tue, 19 Feb 2019 12:18:27 -0800
Subject: Check that left hand side of assignment expression is an lvalue

---
 expr.c | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'expr.c')

diff --git a/expr.c b/expr.c
index 11d6fbe..aad7cbc 100644
--- a/expr.c
+++ b/expr.c
@@ -841,6 +841,8 @@ assignexpr(struct scope *s)
 	default:
 		return l;
 	}
+	if (!(l->flags & EXPRFLAG_LVAL))
+		error(&tok.loc, "left side of assignment expression is not an lvalue");
 	next();
 	r = assignexpr(s);
 	lvalueconvert(r);
-- 
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