commit - d87326ab44010855fb3fb6b174f06393981ab44b
commit + 1ad7903cd8c5410dc6573ea27d284a4fa79ec184
blob - 9b92f946642f1a60cd839833f8e878e9650cd0b4
blob + 511bc3ce273087fd5733e3ee3895bd3185bfb55e
--- dulwich/config.py
+++ dulwich/config.py
@@ -26,6 +26,7 @@ TODO:
    subsections
 """
 
+from contextlib import suppress
 import os
 import sys
 from typing import (BinaryIO, Iterable, Iterator, KeysView, List,
@@ -641,13 +642,11 @@ def _find_git_in_win_reg():
         )
 
     for key in (winreg.HKEY_CURRENT_USER, winreg.HKEY_LOCAL_MACHINE):  # type: ignore
-        try:
+        with suppress(OSError):
             with winreg.OpenKey(key, subkey) as k:  # type: ignore
                 val, typ = winreg.QueryValueEx(k, "InstallLocation")  # type: ignore
                 if typ == winreg.REG_SZ:  # type: ignore
                     yield val
-        except OSError:
-            pass
 
 
 # There is no set standard for system config dirs on windows. We try the
blob - 03fb03161da4e4d5cd9da2e45166263a581c4ed4
blob + a4629b53cc38ce46b2429d9549e0be652d4a4d7b
--- dulwich/errors.py
+++ dulwich/errors.py
@@ -134,17 +134,6 @@ class SendPackError(GitProtocolError):
     """An error occurred during send_pack."""
 
 
-# N.B.: UpdateRefsError is no longer used and will be result in
-# Dulwich 0.21.
-# remove: >= 0.21
-class UpdateRefsError(GitProtocolError):
-    """The server reported errors updating refs."""
-
-    def __init__(self, *args, **kwargs):
-        self.ref_status = kwargs.pop("ref_status")
-        super().__init__(*args, **kwargs)
-
-
 class HangupException(GitProtocolError):
     """Hangup exception."""
 
blob - c7c9f616c41f56e0a917484a3f05dbaeaf2ee590
blob + bd60a70feb1086b00451b57fb191f98974a0ac51
--- dulwich/ignore.py
+++ dulwich/ignore.py
@@ -22,6 +22,7 @@
 For details for the matching rules, see https://git-scm.com/docs/gitignore
 """
 
+from contextlib import suppress
 import os.path
 import re
 from typing import (TYPE_CHECKING, BinaryIO, Dict, Iterable, List, Optional,
@@ -380,10 +381,8 @@ class IgnoreFilterManager:
             os.path.join(repo.controldir(), "info", "exclude"),
             default_user_ignore_filter_path(repo.get_config_stack()),
         ]:
-            try:
+            with suppress(OSError):
                 global_filters.append(IgnoreFilter.from_path(os.path.expanduser(p)))
-            except OSError:
-                pass
         config = repo.get_config_stack()
         ignorecase = config.get_boolean((b"core"), (b"ignorecase"), False)
         return cls(repo.path, global_filters, ignorecase)
blob - 82d7c93ba44596757c0cfb1bb5c5e26dae3d0375
blob + b08cb14285c5509954f0dafda86521364ef37ec9
--- dulwich/protocol.py
+++ dulwich/protocol.py
@@ -223,7 +223,7 @@ class Protocol:
         except ConnectionResetError as exc:
             raise HangupException() from exc
         except OSError as exc:
-            raise GitProtocolError(exc) from exc
+            raise GitProtocolError(str(exc)) from exc
         else:
             if len(pkt_contents) + 4 != size:
                 raise GitProtocolError(
@@ -286,7 +286,7 @@ class Protocol:
             if self.report_activity:
                 self.report_activity(len(line), "write")
         except OSError as exc:
-            raise GitProtocolError(exc) from exc
+            raise GitProtocolError(str(exc)) from exc
 
     def write_sideband(self, channel, blob):
         """Write multiplexed data to the sideband.
blob - 1e2414034c97ed545ff0e932da9c7fb4d40e498d
blob + fe47dc7dbd8ce9c3e81fc689ac4a35dc4ebbe72f
--- dulwich/refs.py
+++ dulwich/refs.py
@@ -734,10 +734,8 @@ class DiskRefsContainer(RefsContainer):
                 # remove any loose refs pointing to this one -- please
                 # note that this bypasses remove_if_equals as we don't
                 # want to affect packed refs in here
-                try:
+                with suppress(OSError):
                     os.remove(self.refpath(ref))
-                except OSError:
-                    pass
 
                 if target is not None:
                     packed_refs[ref] = target
blob - 02ab6c0a887864fd54fbdd96cf2418a586f5b7f5
blob + 15ed1dadb225cf581fc7f385dc61dc3d2bd4116b
--- dulwich/tests/compat/test_client.py
+++ dulwich/tests/compat/test_client.py
@@ -20,6 +20,7 @@
 
 """Compatibility tests between the Dulwich client and the cgit server."""
 
+from contextlib import suppress
 import copy
 import http.server
 import os
@@ -386,11 +387,9 @@ class DulwichTCPClientTest(CompatTestCase, DulwichClie
             ctypes.windll.kernel32.TerminateProcess(handle, -1)
             ctypes.windll.kernel32.CloseHandle(handle)
         else:
-            try:
+            with suppress(OSError):
                 os.kill(pid, signal.SIGKILL)
                 os.unlink(self.pidfile)
-            except OSError:
-                pass
         self.process.wait()
         self.process.stdout.close()
         self.process.stderr.close()