diff --git a/mercurial/error.py b/mercurial/error.py
--- a/mercurial/error.py
+++ b/mercurial/error.py
@@ -91,13 +91,16 @@
     """Raised if a command needs to print an error and exit."""
 
 
-class StorageError(Hint, Exception):
+class StorageError(Error):
     """Raised when an error occurs in a storage layer.
 
     Usually subclassed by a storage-specific exception.
     """
 
-    __bytes__ = _tobytes
+    def __init__(self, message, hint=None):
+        super(StorageError, self).__init__(
+            message, hint=hint, detailed_exit_code=50
+        )
 
 
 class RevlogError(StorageError):
diff --git a/mercurial/scmutil.py b/mercurial/scmutil.py
--- a/mercurial/scmutil.py
+++ b/mercurial/scmutil.py
@@ -198,11 +198,6 @@
             ui.error(b"\n%r\n" % pycompat.bytestr(stringutil.ellipsis(msg)))
     except error.CensoredNodeError as inst:
         ui.error(_(b"abort: file censored %s\n") % inst)
-    except error.StorageError as inst:
-        ui.error(_(b"abort: %s\n") % inst)
-        if inst.hint:
-            ui.error(_(b"(%s)\n") % inst.hint)
-        detailed_exit_code = 50
     except error.WdirUnsupported:
         ui.error(_(b"abort: working directory revision cannot be specified\n"))
     except error.Error as inst: