Issue #14200: Idle shell crash on printing non-BMP unicode character.
UnicodeEncodeError is raised for strings contains non-BMP characters.
For eval results unicode escaping is used, print() calls display
exception with traceback as usual.
diff --git a/Lib/idlelib/run.py b/Lib/idlelib/run.py
index 962c6c0..a161a93 100644
--- a/Lib/idlelib/run.py
+++ b/Lib/idlelib/run.py
@@ -6,6 +6,7 @@
import _thread as thread
import threading
import queue
+import builtins
from idlelib import CallTips
from idlelib import AutoComplete
@@ -261,6 +262,25 @@
thread.interrupt_main()
+def displayhook(value):
+ """Override standard display hook to use non-locale encoding"""
+ if value is None:
+ return
+ # Set '_' to None to avoid recursion
+ builtins._ = None
+ text = repr(value)
+ try:
+ sys.stdout.write(text)
+ except UnicodeEncodeError:
+ # let's use ascii while utf8-bmp codec doesn't present
+ encoding = 'ascii'
+ bytes = text.encode(encoding, 'backslashreplace')
+ text = bytes.decode(encoding, 'strict')
+ sys.stdout.write(text)
+ sys.stdout.write("\n")
+ builtins._ = value
+
+
class MyHandler(rpc.RPCHandler):
def handle(self):
@@ -270,6 +290,7 @@
sys.stdin = self.console = self.get_remote_proxy("stdin")
sys.stdout = self.get_remote_proxy("stdout")
sys.stderr = self.get_remote_proxy("stderr")
+ sys.displayhook = displayhook
# page help() text to shell.
import pydoc # import must be done here to capture i/o binding
pydoc.pager = pydoc.plainpager