hbisect: avoid shadowing a variable in a list comprehension

mercurial/hbisect.py

@@ -98,7 +98,7 b' def bisect(changelog, state):'
     tot = len(candidates)
     unskipped = [c for c in candidates if (c not in skip) and (c != badrev)]
     if tot == 1 or not unskipped:
-        return ([changelog.node(rev) for rev in candidates], 0, good)
+        return ([changelog.node(c) for c in candidates], 0, good)
     perfect = tot // 2
 
     # find the best node to test