posix: fix test-permissions regression

mercurial/posix.py

@@ -182,14 +182,16 b' def checklink(path):'
                 # link creation might race, try again
                 if inst[0] == errno.EEXIST:
                     continue
+                raise
+            finally:
+                fd.close()
+        except AttributeError:
+            return False
+        except OSError as inst:
                 # sshfs might report failure while successfully creating the link
                 if inst[0] == errno.EIO and os.path.exists(name):
                     os.unlink(name)
                 return False
-            finally:
-                fd.close()
-        except AttributeError:
-            return False
 
 def checkosfilename(path):
     '''Check that the base-relative path is a valid filename on this platform.