bpo-38723: Pdb._runscript should use io.open_code() instead of open() (GH-17127)

Co-Authored-By: Brandt Bucher <brandtbucher@gmail.com>
(cherry picked from commit d593881505)

Co-authored-by: jsnklln <jsnklln@gmail.com>

Lib/pdb.py

@@ -68,6 +68,7 @@ Debugger commands
 # commands and is appended to __doc__ after the class has been defined.
 
 import os
+import io
 import re
 import sys
 import cmd
@@ -1565,7 +1566,7 @@ class Pdb(bdb.Bdb, cmd.Cmd):
         self._wait_for_mainpyfile = True
         self.mainpyfile = self.canonic(filename)
         self._user_requested_quit = False
-        with open(filename, "rb") as fp:
+        with io.open_code(filename) as fp:
             statement = "exec(compile(%r, %r, 'exec'))" % \
                         (fp.read(), self.mainpyfile)
         self.run(statement)

Misc/NEWS.d/next/Library/2019-11-12-15-46-28.bpo-38723.gcdMFn.rst

@@ -0,0 +1 @@
+:mod:`pdb` now uses :meth:`io.open_code` to trigger auditing events.