--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/c-c++-common/raw-string-7.c	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,24 @@
+// The trailing whitespace after \ and before newline extension
+// breaks full compliance for raw strings.
+// { dg-do run { xfail *-*-* } }
+// { dg-options "-std=gnu99" { target c } }
+// { dg-options "-std=c++0x" { target c++ } }
+
+// Note, there is a single space after \ on the following line.
+const char *s0 = R"(\ 
+)";
+// { dg-bogus "backslash and newline separated by space" "" { xfail *-*-* } 8 }
+
+// Note, there is a single tab after \ on the following line.
+const char *s1 = R"(\	
+)";
+// { dg-bogus "backslash and newline separated by space" "" { xfail *-*-* } 13 }
+
+int
+main (void)
+{
+  if (__builtin_strcmp (s0, "\\ \n") != 0
+      || __builtin_strcmp (s1, "\\\t\n") != 0)
+    __builtin_abort ();
+  return 0;
+}