--- a/hgdemandimport/tracing.py	Mon Jan 06 14:15:40 2025 -0500
+++ b/hgdemandimport/tracing.py	Sun Jan 05 21:03:17 2025 -0500
@@ -42,13 +42,13 @@
         # problems too.
         try:
             _pipe.write('START %s %s\n' % (_session, whence))
-        except IOError:
+        except OSError:
             pass
         yield
     finally:
         try:
             _pipe.write('END %s %s\n' % (_session, whence))
-        except IOError:
+        except OSError:
             pass
 
 
@@ -59,5 +59,5 @@
     # See above in log() for why this is in a try/except.
     try:
         _pipe.write('COUNTER %s %d %s\n' % (_session, amount, l))
-    except IOError:
+    except OSError:
         pass