--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/c-c++-common/diagnostic-format-json-4.c	Thu Feb 13 11:34:05 2020 +0900
@@ -0,0 +1,61 @@
+/* { dg-do compile } */
+/* { dg-options "-fdiagnostics-format=json -Wmisleading-indentation" } */
+
+int test (void)
+{
+  if (1)
+    return 3;
+    return 4;
+  return 5;
+}
+
+/* Use dg-regexp to consume the JSON output starting with
+   the innermost values, and working outwards.
+   We can't rely on any ordering of the keys.  */
+
+/* Verify nested diagnostics.  */
+
+/* The nested diagnostic.  */
+
+/* { dg-regexp "\"kind\": \"note\"" } */
+/* { dg-regexp "\"message\": \"...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'\"" } */
+
+/* { dg-regexp "\"caret\": \{" } */
+/* { dg-regexp "\"file\": \"\[^\n\r\"\]*diagnostic-format-json-4.c\"" } */
+/* { dg-regexp "\"line\": 8" } */
+/* { dg-regexp "\"column\": 5" } */
+
+/* { dg-regexp "\"finish\": \{" } */
+/* { dg-regexp "\"file\": \"\[^\n\r\"\]*diagnostic-format-json-4.c\"" } */
+/* { dg-regexp "\"line\": 8" } */
+/* { dg-regexp "\"column\": 10" } */
+
+/* The outer diagnostic.  */
+
+/* { dg-regexp "\"kind\": \"warning\"" } */
+/* { dg-regexp "\"message\": \"this 'if' clause does not guard...\"" } */
+/* { dg-regexp "\"option\": \"-Wmisleading-indentation\"" } */
+/* { dg-regexp "\"option_url\": \"https:\[^\n\r\"\]*#index-Wmisleading-indentation\"" } */
+
+/* { dg-regexp "\"caret\": \{" } */
+/* { dg-regexp "\"file\": \"\[^\n\r\"\]*diagnostic-format-json-4.c\"" } */
+/* { dg-regexp "\"line\": 6" } */
+/* { dg-regexp "\"column\": 3" } */
+
+/* { dg-regexp "\"finish\": \{" } */
+/* { dg-regexp "\"file\": \"\[^\n\r\"\]*diagnostic-format-json-4.c\"" } */
+/* { dg-regexp "\"line\": 6" } */
+/* { dg-regexp "\"column\": 4" } */
+
+/* More from the nested diagnostic (we can't guarantee what order the
+   "file" keys are consumed).  */
+
+/* { dg-regexp "\"locations\": \[\[\{\}, \]*\]" } */
+
+/* More from the outer diagnostic.  */
+
+/* { dg-regexp "\"locations\": \[\[\{\}, \]*\]" } */
+
+/* { dg-regexp "\"children\": \[\[\{\}, \]*\]" } */
+/* { dg-regexp "\[\[\{\}, \]*\]" } */
+