/cp

2018-09-27  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/84940
	* semantics.c (finish_unary_op_expr): Check return value of
	build_x_unary_op for error_mark_node.

/testsuite
2018-09-27  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/84940
	* g++.dg/expr/unary4.C: New.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@264664 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/cp/ChangeLog b/gcc/cp/ChangeLog
index 672626c27d981f249e0301124fba6c00709d581c..a28b6150d8f5df53fa47dbc2708a23c3c163a133 100644 (file)
--- a/gcc/cp/ChangeLog
+++ b/gcc/cp/ChangeLog
@@ -1,3 +1,9 @@
+2018-09-27  Paolo Carlini  <paolo.carlini@oracle.com>
+
+       PR c++/84940
+       * semantics.c (finish_unary_op_expr): Check return value of
+       build_x_unary_op for error_mark_node.
+
 2018-09-25  Jakub Jelinek  <jakub@redhat.com>
 
        PR c++/87398

diff --git a/gcc/cp/semantics.c b/gcc/cp/semantics.c
index bf3c63a09a1fbe98723d567174519ea53d9bd074..c7f53d1206e853acaa60d4fa1e78d02661956f94 100644 (file)
--- a/gcc/cp/semantics.c
+++ b/gcc/cp/semantics.c
@@ -2727,13 +2727,14 @@ finish_unary_op_expr (location_t op_loc, enum tree_code code, cp_expr expr,
   /* TODO: build_x_unary_op doesn't always honor the location.  */
   result.set_location (combined_loc);
 
-  tree result_ovl, expr_ovl;
+  if (result == error_mark_node)
+    return result;
 
   if (!(complain & tf_warning))
     return result;
 
-  result_ovl = result;
-  expr_ovl = expr;
+  tree result_ovl = result;
+  tree expr_ovl = expr;
 
   if (!processing_template_decl)
     expr_ovl = cp_fully_fold (expr_ovl);

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index b7dd6734bca29c54af40244b816a27d1d8fe3455..4bca408202237f919e540acd0abe2e4ce54256fc 100644 (file)
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2018-09-27  Paolo Carlini  <paolo.carlini@oracle.com>
+
+       PR c++/84940
+       * g++.dg/expr/unary4.C: New.
+
 2018-09-26  Indu Bhagat  <indu.bhagat@oracle.com>
 
        PR gcov-profile/86957

diff --git a/gcc/testsuite/g++.dg/expr/unary4.C b/gcc/testsuite/g++.dg/expr/unary4.C
new file mode 100644 (file)
index 0000000..2b58a8d
--- /dev/null
+++ b/gcc/testsuite/g++.dg/expr/unary4.C
@@ -0,0 +1,8 @@
+// PR c++/84940
+// { dg-additional-options -Wno-vla }
+
+void
+foo (int x)
+{
+  struct {} a[1][x](-a[0]); // { dg-error "wrong type argument to unary minus" }
+}