diff --git a/mercurial/hbisect.py b/mercurial/hbisect.py
--- a/mercurial/hbisect.py
+++ b/mercurial/hbisect.py
@@ -35,8 +35,9 @@ def bisect(changelog, state):
         # build visit array
         ancestors = [None] * (len(changelog) + 1) # an extra for [-1]
 
-        # set nodes descended from goodrev
-        ancestors[goodrev] = []
+        # set nodes descended from goodrevs
+        for rev in goodrevs:
+            ancestors[rev] = []
         for rev in xrange(goodrev + 1, len(changelog)):
             for prev in clparents(rev):
                 if ancestors[prev] == []:
diff --git a/tests/test-bisect2.t b/tests/test-bisect2.t
--- a/tests/test-bisect2.t
+++ b/tests/test-bisect2.t
@@ -431,3 +431,22 @@ end at merge: 17 bad, 11 good (but 9 is 
   date:        Thu Jan 01 00:00:09 1970 +0000
   summary:     9
   
+
+user adds irrelevant but consistent information (here: -g 2) to bisect state
+
+  $ hg bisect -r
+  $ hg bisect -b 13
+  $ hg bisect -g 8
+  Testing changeset 11:82ca6f06eccd (3 changesets remaining, ~1 tests)
+  2 files updated, 0 files merged, 0 files removed, 0 files unresolved
+  $ hg bisect -g 2
+  Testing changeset 11:82ca6f06eccd (3 changesets remaining, ~1 tests)
+  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
+  $ hg bisect -b
+  The first bad revision is:
+  changeset:   11:82ca6f06eccd
+  parent:      8:dab8161ac8fc
+  user:        test
+  date:        Thu Jan 01 00:00:11 1970 +0000
+  summary:     11
+