1 files changed, 14 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/lvalue-3.c b/gcc/testsuite/gcc.dg/lvalue-3.c
new file mode 100644
index 0000000..0745c7e
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/lvalue-3.c
@@ -0,0 +1,14 @@
+/* Test that assignment of a read-only variable that gets const-ness
+   from a read-only field is diagnosed.  */
+/* Origin: Joseph Myers <joseph@codesourcery.com> */
+/* { dg-do compile } */
+/* { dg-options "" } */
+
+struct s { const int a; } x;
+typeof (x.a) b;
+void
+f (void)
+{
+  x.a = 1; /* { dg-error "error: assignment of read-only member 'a'" } */
+  b = 1; /* { dg-error "error: assignment of read-only variable 'b'" } */
+}