diff -r d0ea92701b1e Lib/idlelib/PyShell.py
--- a/Lib/idlelib/PyShell.py	Mon Aug 11 01:11:13 2014 +0200
+++ b/Lib/idlelib/PyShell.py	Mon Aug 11 20:46:08 2014 +0530
@@ -161,6 +161,13 @@
     def set_breakpoint(self, lineno):
         text = self.text
         filename = self.io.filename
+        if not filename:
+            script_binding = self.extensions.get('ScriptBinding')
+            if script_binding:
+                self.set_saved(False)
+                filename = script_binding.getfilename()
+                if not filename:
+                    return
         text.tag_add("BREAK", "%d.0" % lineno, "%d.0" % (lineno+1))
         try:
             i = self.breakpoints.index(lineno)
@@ -173,21 +180,19 @@
             pass
 
     def set_breakpoint_here(self, event=None):
+        lineno = int(float(self.text.index("insert")))
+        self.set_breakpoint(lineno)
+
+    def clear_breakpoint(self, lineno):
         text = self.text
         filename = self.io.filename
         if not filename:
-            text.bell()
-            return
-        lineno = int(float(text.index("insert")))
-        self.set_breakpoint(lineno)
-
-    def clear_breakpoint_here(self, event=None):
-        text = self.text
-        filename = self.io.filename
-        if not filename:
-            text.bell()
-            return
-        lineno = int(float(text.index("insert")))
+            script_binding = self.extensions.get('ScriptBinding')
+            if script_binding:
+                self.set_saved(False)
+                filename = script_binding.getfilename()
+                if not filename:
+                    return
         try:
             self.breakpoints.remove(lineno)
         except:
@@ -200,13 +205,20 @@
         except:
             pass
 
+    def clear_breakpoint_here(self, event=None):
+        lineno = int(float(self.text.index("insert")))
+        self.clear_breakpoint(lineno)
+
     def clear_file_breaks(self):
         if self.breakpoints:
             text = self.text
             filename = self.io.filename
             if not filename:
-                text.bell()
-                return
+                script_binding = self.extensions.get('ScriptBinding')
+                if script_binding:
+                    filename = script_binding.getfilename()
+                else:
+                    return
             self.breakpoints = []
             text.tag_remove("BREAK", "1.0", END)
             try: