re PR c++/69628 (Conditional jump or move depends on uninitialised value(s) in…

re PR c++/69628 (Conditional jump or move depends on uninitialised value(s) in lex_charconst(cpp_token const*) (c-lex.c:1252))

	PR c++/69628
	* charset.c (cpp_interpret_charconst): Clear *PCHARS_SEEN
	and *UNSIGNEDP if bailing out early due to errors.

	* g++.dg/parse/pr69628.C: New test.

From-SVN: r233186

gcc/testsuite/ChangeLog

+2016-02-05  Jakub Jelinek  <jakub@redhat.com>
+
+	PR c++/69628
+	* g++.dg/parse/pr69628.C: New test.
+
 2016-02-05  Uros Bizjak  <ubizjak@gmail.com>
 
 	* gcc.dg/sancov/asan.c: Move to ...

gcc/testsuite/g++.dg/parse/pr69628.C

+// PR c++/69628
+// { dg-do compile }
+
+0''; // { dg-error "empty character constant" }
+// { dg-error "expected unqualified-id before numeric constant" "" { target *-*-* } 4 }

libcpp/ChangeLog

+2016-02-05  Jakub Jelinek  <jakub@redhat.com>
+
+	PR c++/69628
+	* charset.c (cpp_interpret_charconst): Clear *PCHARS_SEEN
+	and *UNSIGNEDP if bailing out early due to errors.
+
 2016-01-28  Jakub Jelinek  <jakub@redhat.com>
 
 	PR pch/68176

libcpp/charset.c

@@ -1620,10 +1620,17 @@ cpp_interpret_charconst (cpp_reader *pfile, const cpp_token *token,
   if (token->val.str.len == (size_t) (2 + wide + u8))
     {
       cpp_error (pfile, CPP_DL_ERROR, "empty character constant");
+      *pchars_seen = 0;
+      *unsignedp = 0;
       return 0;
     }
-  else if (!cpp_interpret_string (pfile, &token->val.str, 1, &str, token->type))
+  else if (!cpp_interpret_string (pfile, &token->val.str, 1, &str,
+				  token->type))
+    {
+      *pchars_seen = 0;
+      *unsignedp = 0;
       return 0;
+    }
 
   if (wide)
     result = wide_str_to_charconst (pfile, str, pchars_seen, unsignedp,