diff -r 884b595f5195 -r 5326e4ef1dab mercurial/util.py
--- a/mercurial/util.py	Mon Oct 02 18:18:57 2017 +0100
+++ b/mercurial/util.py	Fri Sep 29 15:49:20 2017 +0000
@@ -1605,8 +1605,10 @@
         ifp.close()
         ofp.close()
     except: # re-raises
-        try: os.unlink(temp)
-        except OSError: pass
+        try:
+            os.unlink(temp)
+        except OSError:
+            pass
         raise
     return temp