prevent IDLE from trying to close when sys.stdin is reassigned (#17838)
diff --git a/Lib/idlelib/run.py b/Lib/idlelib/run.py
index e82ebf4..9cc009f 100644
--- a/Lib/idlelib/run.py
+++ b/Lib/idlelib/run.py
@@ -264,6 +264,11 @@
IOBinding.encoding)
sys.stderr = PyShell.PseudoOutputFile(self.console, "stderr",
IOBinding.encoding)
+
+ # Keep a reference to stdin so that it won't try to exit IDLE if
+ # sys.stdin gets changed from within IDLE's shell. See issue17838.
+ self._keep_stdin = sys.stdin
+
self.interp = self.get_remote_proxy("interp")
rpc.RPCHandler.getresponse(self, myseq=None, wait=0.05)
diff --git a/Misc/NEWS b/Misc/NEWS
index 624a8af..0405fb9 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -122,6 +122,8 @@
IDLE
----
+- Issue #17838: Allow sys.stdin to be reassigned.
+
- Issue #14735: Update IDLE docs to omit "Control-z on Windows".
- Issue #17585: Fixed IDLE regression. Now closes when using exit() or quit().