remove potential preg warnings if --EXPECTHEADERS-- is combined with --EXPECTF--...

diff --git a/run-tests.php b/run-tests.php
index fc7992eec16408d23ba3b88c6474dc795229b0da..218e33276b63bdf19df5835aa202f03a25904ada 100755 (executable)
--- a/run-tests.php
+++ b/run-tests.php
@@ -1667,7 +1667,7 @@ COMMAND $cmd
                $wanted = $wanted_headers . "\n--HEADERS--\n" . $wanted;
                $output = $output_headers . "\n--HEADERS--\n" . $output;
                if (isset($wanted_re)) {
-                       $wanted_re = $wanted_headers . "\n--HEADERS--\n" . $wanted_re;
+                       $wanted_re = preg_quote($wanted_headers . "\n--HEADERS--\n", '/') . $wanted_re;
                }
        }