bpo-36272: Logging now propagates RecursionError (GH-12312) (GH-12391)

(cherry picked from commit 65f64b1903ae85b97a30f514bbc1b7ce940c3af2)

Co-authored-by: Rémi Lapeyre <remi.lapeyre@henki.fr>

diff --git a/Lib/logging/__init__.py b/Lib/logging/__init__.py
index 2761509d9951496cd794510590edc78f2cdb0ff1..66fd5ac9fe06c5169c93860551038b09190c2ca5 100644 (file)
--- a/Lib/logging/__init__.py
+++ b/Lib/logging/__init__.py
@@ -974,6 +974,8 @@ class Handler(Filterer):
                     sys.stderr.write('Message: %r\n'
                                      'Arguments: %s\n' % (record.msg,
                                                           record.args))
+                except RecursionError:  # See issue 36272
+                    raise
                 except Exception:
                     sys.stderr.write('Unable to print the message and arguments'
                                      ' - possible formatting error.\nUse the'
@@ -1036,6 +1038,8 @@ class StreamHandler(Handler):
             # issue 35046: merged two stream.writes into one.
             stream.write(msg + self.terminator)
             self.flush()
+        except RecursionError:  # See issue 36272
+            raise
         except Exception:
             self.handleError(record)
 

diff --git a/Lib/test/test_logging.py b/Lib/test/test_logging.py
index 1ea2967f5b4a8f9f1c0faa18484244d6761c6899..3b671ce2ab370914fd782c5d0f976ad478eddc37 100644 (file)
--- a/Lib/test/test_logging.py
+++ b/Lib/test/test_logging.py
@@ -40,7 +40,7 @@ import socket
 import struct
 import sys
 import tempfile
-from test.support.script_helper import assert_python_ok
+from test.support.script_helper import assert_python_ok, assert_python_failure
 from test import support
 import textwrap
 import threading
@@ -3841,6 +3841,21 @@ class ModuleLevelMiscTest(BaseTest):
         self.assertIn("exception in __del__", err)
         self.assertIn("ValueError: some error", err)
 
+    def test_recursion_error(self):
+        # Issue 36272
+        code = """if 1:
+            import logging
+
+            def rec():
+                logging.error("foo")
+                rec()
+
+            rec()"""
+        rc, out, err = assert_python_failure("-c", code)
+        err = err.decode()
+        self.assertNotIn("Cannot recover from stack overflow.", err)
+        self.assertEqual(rc, 1)
+
 
 class LogRecordTest(BaseTest):
     def test_str_rep(self):

diff --git a/Misc/NEWS.d/next/Library/2019-03-13-14-14-36.bpo-36272.f3l2IG.rst b/Misc/NEWS.d/next/Library/2019-03-13-14-14-36.bpo-36272.f3l2IG.rst
new file mode 100644 (file)
index 0000000..2f2f790
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2019-03-13-14-14-36.bpo-36272.f3l2IG.rst
@@ -0,0 +1,2 @@
+:mod:`logging` does not silently ignore RecursionError anymore. Patch
+contributed by Rémi Lapeyre.