* extension.c (eval_ext_lang_from_control_command): Avoid dereferencing

NULL pointer.

	testsuite/
	* gdb.python/python.exp (python not supported): Verify multi-line
	python command issues an error.

gdb/ChangeLog

@@ -1,3 +1,8 @@
+2014-03-21  Daniel Gutson  <daniel.gutson@tallertechnologies.com>
+
+	* extension.c (eval_ext_lang_from_control_command): Avoid dereferencing
+	NULL pointer.
+
 2014-03-21  Pedro Alves  <palves@redhat.com>
 
 	* infrun.c (normal_stop): Extend comment.

gdb/extension.c

@@ -342,7 +342,8 @@ eval_ext_lang_from_control_command (struct command_line *cmd)
     {
       if (extlang->cli_control_type == cmd->control_type)
 	{
-	  if (extlang->ops->eval_from_control_command != NULL)
+	  if (extlang->ops != NULL
+	      && extlang->ops->eval_from_control_command != NULL)
 	    {
 	      extlang->ops->eval_from_control_command (extlang, cmd);
 	      return;

gdb/testsuite/ChangeLog

@@ -1,3 +1,8 @@
+2014-03-22  Doug Evans  <xdje42@gmail.com>
+
+	* gdb.python/python.exp (python not supported): Verify multi-line
+	python command issues an error.
+
 2014-03-21  Maciej W. Rozycki  <macro@codesourcery.com>
 
 	* gdb.threads/thread-specific.exp: Handle the lack of usable

gdb/testsuite/gdb.python/python.exp

@@ -41,6 +41,13 @@ gdb_test_multiple "python print (23)" "verify python support" {
       gdb_test "source $srcdir/$subdir/source2.py" \
 	  "Error in sourced command file:.*" \
 	  "source source2.py when python disabled"
+
+      # Verify multi-line python commands cause an error.
+      gdb_py_test_multiple "multi-line python command" \
+	  "python" "" \
+	  "print (23)" "" \
+	  "end" "not supported.*"
+
       return -1
     }
     -re "$gdb_prompt $"	{}