From ae5d234e11b21b1aab2dc4a9e79f8a9d7831ef69 Mon Sep 17 00:00:00 2001
From: Richard Henderson <rth@redhat.com>
Date: Fri, 26 Apr 2002 14:56:55 -0700
Subject: [PATCH] c-typeck.c (build_unary_op): Invoke non_lvalue.

        * c-typeck.c (build_unary_op) [CONVERT_EXPR]: Invoke non_lvalue.
	* gcc.dg/lvalue1.c: New.

From-SVN: r52812
---
 gcc/ChangeLog                  | 5 +++++
 gcc/c-typeck.c                 | 1 +
 gcc/testsuite/gcc.dg/lvalue1.c | 9 +++++++++
 3 files changed, 15 insertions(+)
 create mode 100644 gcc/testsuite/gcc.dg/lvalue1.c

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 05394caf8ed..6a32a2106af 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2002-04-26  Richard Henderson  <rth@redhat.com>
+
+	PR c/5225
+	* c-typeck.c (build_unary_op) [CONVERT_EXPR]: Invoke non_lvalue.
+
 2002-04-26  Mark Mitchell  <mark@codesourcery.com>
 
 	PR bootstrap/6445
diff --git a/gcc/c-typeck.c b/gcc/c-typeck.c
index f8838019557..7e91d4fc692 100644
--- a/gcc/c-typeck.c
+++ b/gcc/c-typeck.c
@@ -2759,6 +2759,7 @@ build_unary_op (code, xarg, flag)
 	}
       else if (!noconvert)
 	arg = default_conversion (arg);
+      arg = non_lvalue (arg);
       break;
 
     case NEGATE_EXPR:
diff --git a/gcc/testsuite/gcc.dg/lvalue1.c b/gcc/testsuite/gcc.dg/lvalue1.c
new file mode 100644
index 00000000000..7e21608ab36
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/lvalue1.c
@@ -0,0 +1,9 @@
+/* PR c/5225 */
+/* { dg-do compile } */
+
+int main()
+{
+  int i;
+  +i = 1;	/* { dg-error "invalid lvalue in assignment" } */
+  return 0;
+}