memory leak in case of "read -e"

[ZhangXiao]

Hi Chet and experts,

Build in command "read" with "-e" option causes memory leak. Can be
reproduced with below script and lots of input data.

$cat script.sh
#!/bin/bash/bash
while [ 1 ];
do
        read -e data;
        echo $data;
done
$./script.sh


The patch at the end of this mail can fix it.

Thanks
Xiao

diff --git a/builtins/read.def b/builtins/read.def
index 33821f3..60bdc87 100644
--- a/builtins/read.def
+++ b/builtins/read.def
@@ -690,6 +690,11 @@ add_char:
   input_string[i] = '\0';
   CHECK_ALRM;

+#if defined (READLINE)
+  if (edit)
+    xfree (rlbuf);
+#endif
+
   if (retval < 0)
     {
       t_errno = errno;