[xen-4.9-testing bisection] doubtful build-amd64-prev

[osstest service owner <osstest-admin@xxxxxxxxxxxxxx>]

branch xen-4.9-testing
xenbranch xen-4.9-testing
job build-amd64-prev
testid xen-build

Tree: ovmf prev git://xenbits.xen.org/osstest/ovmf.git
Tree: seabios prev git://xenbits.xen.org/osstest/seabios.git
Tree: xen prev git://xenbits.xen.org/xen.git

*** Flailing - >=5 identical flights to no useful effect ***
  Bisector is flailing: >=5 identical flights generated.
  Problem occurs when attempting to test this revision:
   e54310451f1ac2ce4ccb90a110f45bb9b4f3ccd6 
eaaf726038cb9b2d01312d6430b4e93842aa96eb 
8db85532cbb80c6396e5dab8809feb7b7b0d5c45
  
  Identical previous flights on this branch:
   150987  started 2020-06-10 00:49:04 Z  blessed real-bisect
   150985  started 2020-06-10 00:05:01 Z  blessed real-bisect
   150983  started 2020-06-09 23:03:45 Z  blessed real-bisect
   150980  started 2020-06-09 21:43:50 Z  blessed real-bisect
   150974  started 2020-06-09 20:53:36 Z  blessed real-bisect
   150989  just generated


----------------------------------------
Running cs-bisection-step 
--graph-out=/home/logs/results/bisect/xen-4.9-testing/build-amd64-prev.xen-build
 --summary-out=tmp/150989.bisection-summary --basis-template=150120 
--blessings=real,real-bisect --flight=150989 xen-4.9-testing build-amd64-prev 
xen-build
Searching for failure / basis pass:
 150951 fail [host=pinot0] / 150120 [host=godello1] 150102 [host=godello1] 
150085 [host=chardonnay1] 150068 [host=godello1] 150051 [host=chardonnay1] 
150038 ok.
Failure / basis pass flights: 150951 / 150038
Tree: ovmf prev git://xenbits.xen.org/osstest/ovmf.git
Tree: seabios prev git://xenbits.xen.org/osstest/seabios.git
Tree: xen prev git://xenbits.xen.org/xen.git
Latest 6ff7c838d09224dd4e4c9b5b93152d8db1b19740 
2e3de6253422112ae43e608661ba94ea6b345694 
8db85532cbb80c6396e5dab8809feb7b7b0d5c45
Basis pass e54310451f1ac2ce4ccb90a110f45bb9b4f3ccd6 
eaaf726038cb9b2d01312d6430b4e93842aa96eb 
8db85532cbb80c6396e5dab8809feb7b7b0d5c45
Generating revisions with ./adhoc-revtuple-generator  
git://xenbits.xen.org/osstest/ovmf.git#e54310451f1ac2ce4ccb90a110f45bb9b4f3ccd6-6ff7c838d09224dd4e4c9b5b93152d8db1b19740
 
git://xenbits.xen.org/osstest/seabios.git#eaaf726038cb9b2d01312d6430b4e93842aa96eb-2e3de6253422112ae43e608661ba94ea6b345694
 
git://xenbits.xen.org/xen.git#8db85532cbb80c6396e5dab8809feb7b7b0d5c45-8db85532cbb80c6396e5dab8809feb7b7b0d5c45
Use of uninitialized value $parents in array dereference at 
./adhoc-revtuple-generator line 465.
Use of uninitialized value in concatenation (.) or string at 
./adhoc-revtuple-generator line 465.
Loaded 7573 nodes in revision graph
Searching for test results:
 150038 pass e54310451f1ac2ce4ccb90a110f45bb9b4f3ccd6 
eaaf726038cb9b2d01312d6430b4e93842aa96eb 
8db85532cbb80c6396e5dab8809feb7b7b0d5c45
 150051 [host=chardonnay1]
 150085 [host=chardonnay1]
 150068 [host=godello1]
 150120 [host=godello1]
 150102 [host=godello1]
 150940 fail 6ff7c838d09224dd4e4c9b5b93152d8db1b19740 
2e3de6253422112ae43e608661ba94ea6b345694 
8db85532cbb80c6396e5dab8809feb7b7b0d5c45
 150980 !! flight 150980 no revisions or trees
 150983 !! flight 150983 no revisions or trees
 150985 !! flight 150985 no revisions or trees
 150987 !! flight 150987 no revisions or trees
 150951 fail 6ff7c838d09224dd4e4c9b5b93152d8db1b19740 
2e3de6253422112ae43e608661ba94ea6b345694 
8db85532cbb80c6396e5dab8809feb7b7b0d5c45
 150974 !! flight 150974 no revisions or trees
Searching for interesting versions
 Result found: flight 150038 (pass), for basis pass
 For basis failure, parent search stopping at 
e54310451f1ac2ce4ccb90a110f45bb9b4f3ccd6 
eaaf726038cb9b2d01312d6430b4e93842aa96eb 
8db85532cbb80c6396e5dab8809feb7b7b0d5c45, results HASH(0x55add1c115e0) Result 
found: flight 150940 (fail), for basis failure (at ancestor ~7572)
Need to reproduce basis pass (pass); had 1 already.
Should test e54310451f1ac2ce4ccb90a110f45bb9b4f3ccd6 
eaaf726038cb9b2d01312d6430b4e93842aa96eb 
8db85532cbb80c6396e5dab8809feb7b7b0d5c45.
pnmtopng: 95 colors found
Revision graph left in 
/home/logs/results/bisect/xen-4.9-testing/build-amd64-prev.xen-build.{dot,ps,png,html,svg}.
Populating 150989...
Need 150989.build-amd64-prev (like 150951)
Creating 150989.build-amd64-prev (copying from 150951)
Checking for flail (since 150038)...

*** Flailing - >=5 identical flights to no useful effect ***
  Bisector is flailing: >=5 identical flights generated.
  Problem occurs when attempting to test this revision:
   e54310451f1ac2ce4ccb90a110f45bb9b4f3ccd6 
eaaf726038cb9b2d01312d6430b4e93842aa96eb 
8db85532cbb80c6396e5dab8809feb7b7b0d5c45
  
  Identical previous flights on this branch:
   150987  started 2020-06-10 00:49:04 Z  blessed real-bisect
   150985  started 2020-06-10 00:05:01 Z  blessed real-bisect
   150983  started 2020-06-09 23:03:45 Z  blessed real-bisect
   150980  started 2020-06-09 21:43:50 Z  blessed real-bisect
   150974  started 2020-06-09 20:53:36 Z  blessed real-bisect
   150989  just generated