--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/g++.dg/analyzer/cstdlib-2.C	Mon May 25 07:50:57 2020 +0900
@@ -0,0 +1,25 @@
+/* Manual reimplemenation of <cstdlib>, to test name-matching within std.  */
+
+namespace std
+{
+  typedef __SIZE_TYPE__ size_t;
+  void *malloc (std::size_t size);
+  void *calloc (std::size_t num, std::size_t size);
+  void free (void *ptr);
+}
+
+void test_1 (void *ptr)
+{
+  std::free (ptr); /* { dg-message "first 'free' here" } */
+  std::free (ptr); /* { dg-warning "double-'free' of 'ptr'" } */
+}
+
+void test_2 (void)
+{
+  void *p = std::malloc (1024); /* { dg-message "allocated here" } */
+} /* { dg-warning "leak of 'p'" } */
+
+void test_3 (void)
+{
+  void *p = std::calloc (42, 1024); /* { dg-message "allocated here" } */
+} /* { dg-warning "leak of 'p'" } */