d-demangle.c (dlang_parse_tuple): Correctly handle error result.

     * d-demangle.c (dlang_parse_tuple): Correctly handle error result.
     * testsuite/d-demangle-expected: Add testcase.

From-SVN: r270699

libiberty/ChangeLog

 2019-04-30  Ben L  <bobsayshilol@live.co.uk>
 
+	* d-demangle.c (dlang_parse_tuple): Correctly handle error result.
+	* testsuite/d-demangle-expected: Add testcase.
+
 	* d-demangle.c (dlang_parse_structlit): Correctly handle error result.
 	* testsuite/d-demangle-expected: Add testcase.
 

libiberty/d-demangle.c

@@ -1503,6 +1503,9 @@ dlang_parse_tuple (string *decl, const char *mangled)
   while (elements--)
     {
       mangled = dlang_type (decl, mangled);
+      if (mangled == NULL)
+	return NULL;
+
       if (elements != 0)
 	string_append (decl, ", ");
     }

libiberty/testsuite/d-demangle-expected

@@ -1318,3 +1318,7 @@ _D5__T2fnVmA1A1A911111111D
 --format=dlang
 _D7__T2fnVlS8S588888888888S6S5
 _D7__T2fnVlS8S588888888888S6S5
+# Could crash
+--format=dlang
+_D1_B699999999961*
+_D1_B699999999961*