(Merge 3.2) Issue #12074: regrtest displays also the current number of failures

diff --cc Lib/test/regrtest.py
index 2a08de4c72d1b0df15b06961caf6dcc48b8d41fa,a8726b52465f5bc450c6ad1824ba39fb69635dc3..ccbe6f9699794e27e02bd9031b184ace4fc35ee5
--- 1/Lib/test/regrtest.py
--- 2/Lib/test/regrtest.py
+++ b/Lib/test/regrtest.py
@@@ -640,9 -592,6 +642,8 @@@ def main(tests=None, testdir=None, verb
                  if result[0] == INTERRUPTED:
                      assert result[1] == 'KeyboardInterrupt'
                      raise KeyboardInterrupt   # What else?
-                 accumulate_result(test, result)
 +                if result[0] == CHILD_ERROR:
 +                    raise Exception("Child error on {}: {}".format(test, result[1]))
                  test_index += 1
          except KeyboardInterrupt:
              interrupted = True