[xen-4.12-testing bisection] doubtful build-i386-prev

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

branch xen-4.12-testing
xenbranch xen-4.12-testing
job build-i386-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:
   b15646484eaffcf7cc464fdea0214498f26addc2 
c1ab7d7ed5306641784a9ed8972db5151a49a1a1 
8bfcd2e5fd1c6a8a64cd29aab6114826cd5e5be5
  
  Identical previous flights on this branch:
   151027  started 2020-06-10 22:38:53 Z  blessed real-bisect
   151026  started 2020-06-10 21:27:47 Z  blessed real-bisect
   151025  started 2020-06-10 20:17:35 Z  blessed real-bisect
   151023  started 2020-06-10 18:43:53 Z  blessed real-bisect
   150992  started 2020-06-10 02:07:44 Z  blessed real-bisect
   151028  just generated


----------------------------------------
Running cs-bisection-step 
--graph-out=/home/logs/results/bisect/xen-4.12-testing/build-i386-prev.xen-build
 --summary-out=tmp/151028.bisection-summary --basis-template=150176 
--blessings=real,real-bisect --flight=151028 xen-4.12-testing build-i386-prev 
xen-build
Searching for failure / basis pass:
 150943 fail [host=chardonnay0] / 150176 [host=italia0] 150072 [host=pinot1] 
150041 [host=albana1] 149845 [host=italia0] 149838 [host=pinot1] 149646 
[host=debina0] 149607 [host=fiano1] 149583 [host=chardonnay1] 149554 
[host=fiano0] 148185 [host=fiano1] 148124 [host=fiano1] 146100 [host=pinot1] 
146078 [host=rimava1] 145017 [host=debina1] 144717 [host=huxelrebe0] 144587 
[host=baroque0] 144339 [host=huxelrebe1] 144319 [host=huxelrebe1] 144308 
[host=baroque0] 144299 [host=debina0] 144291 [host=huxel\
 rebe0] 144287 [host=debina0] 144281 [host=fiano1] 144272 [host=debina0] 144258 
[host=huxelrebe0] 144247 [host=baroque0] 144241 [host=huxelrebe0] 144235 
[host=huxelrebe1] 144228 [host=debina1] 144216 [host=fiano1] 144207 
[host=huxelrebe1] 144201 [host=albana0] 144195 [host=huxelrebe0] 144191 
[host=huxelrebe1] 144186 [host=huxelrebe1] 144176 [host=huxelrebe0] 144169 
[host=huxelrebe0] 144158 [host=baroque0] 144141 [host=huxelrebe0] 144109 
[host=huxelrebe1] 144078 [host=debina0] 144059 [host=huxelre\
 be0] 144035 [host=italia0] 144007 [host=debina1] 143996 [host=italia0] 143980 
[host=rimava1] 143955 [host=albana1] 143922 [host=albana1] 143851 
[host=huxelrebe0] 143677 ok.
Failure / basis pass flights: 150943 / 143677
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 
7dd2ac39e40f0afe1cc6d879bfe65cbf19520cab
Basis pass b15646484eaffcf7cc464fdea0214498f26addc2 
c1ab7d7ed5306641784a9ed8972db5151a49a1a1 
8bfcd2e5fd1c6a8a64cd29aab6114826cd5e5be5
Generating revisions with ./adhoc-revtuple-generator  
git://xenbits.xen.org/osstest/ovmf.git#b15646484eaffcf7cc464fdea0214498f26addc2-6ff7c838d09224dd4e4c9b5b93152d8db1b19740
 
git://xenbits.xen.org/osstest/seabios.git#c1ab7d7ed5306641784a9ed8972db5151a49a1a1-2e3de6253422112ae43e608661ba94ea6b345694
 
git://xenbits.xen.org/xen.git#8bfcd2e5fd1c6a8a64cd29aab6114826cd5e5be5-7dd2ac39e40f0afe1cc6d879bfe65cbf19520cab
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 7703 nodes in revision graph
Searching for test results:
 143458 [host=debina0]
 143577 [host=huxelrebe1]
 143677 pass b15646484eaffcf7cc464fdea0214498f26addc2 
c1ab7d7ed5306641784a9ed8972db5151a49a1a1 
8bfcd2e5fd1c6a8a64cd29aab6114826cd5e5be5
 143851 [host=huxelrebe0]
 143955 [host=albana1]
 143922 [host=albana1]
 143980 [host=rimava1]
 143996 [host=italia0]
 144007 [host=debina1]
 144035 [host=italia0]
 144059 [host=huxelrebe0]
 144078 [host=debina0]
 144109 [host=huxelrebe1]
 144141 [host=huxelrebe0]
 144158 [host=baroque0]
 144169 [host=huxelrebe0]
 144176 [host=huxelrebe0]
 144186 [host=huxelrebe1]
 144191 [host=huxelrebe1]
 144195 [host=huxelrebe0]
 144201 [host=albana0]
 144235 [host=huxelrebe1]
 144216 [host=fiano1]
 144207 [host=huxelrebe1]
 144228 [host=debina1]
 144272 [host=debina0]
 144241 [host=huxelrebe0]
 144258 [host=huxelrebe0]
 144247 [host=baroque0]
 144281 [host=fiano1]
 144287 [host=debina0]
 144299 [host=debina0]
 144291 [host=huxelrebe0]
 144319 [host=huxelrebe1]
 144308 [host=baroque0]
 144339 [host=huxelrebe1]
 144587 [host=baroque0]
 144717 [host=huxelrebe0]
 145017 [host=debina1]
 146078 [host=rimava1]
 146100 [host=pinot1]
 148124 [host=fiano1]
 148185 [host=fiano1]
 149554 [host=fiano0]
 149583 [host=chardonnay1]
 149646 [host=debina0]
 149607 [host=fiano1]
 149838 [host=pinot1]
 149845 [host=italia0]
 150041 [host=albana1]
 150072 [host=pinot1]
 150176 [host=italia0]
 150943 fail 6ff7c838d09224dd4e4c9b5b93152d8db1b19740 
2e3de6253422112ae43e608661ba94ea6b345694 
7dd2ac39e40f0afe1cc6d879bfe65cbf19520cab
 150992 !! flight 150992 no revisions or trees
 151023 !! flight 151023 no revisions or trees
 151025 !! flight 151025 no revisions or trees
 151026 !! flight 151026 no revisions or trees
 151027 !! flight 151027 no revisions or trees
Searching for interesting versions
 Result found: flight 143677 (pass), for basis pass
 For basis failure, parent search stopping at 
b15646484eaffcf7cc464fdea0214498f26addc2 
c1ab7d7ed5306641784a9ed8972db5151a49a1a1 
8bfcd2e5fd1c6a8a64cd29aab6114826cd5e5be5, results HASH(0x55b3958a12d8) Result 
found: flight 150943 (fail), for basis failure (at ancestor ~7702)
Need to reproduce basis pass (pass); had 1 already.
Should test b15646484eaffcf7cc464fdea0214498f26addc2 
c1ab7d7ed5306641784a9ed8972db5151a49a1a1 
8bfcd2e5fd1c6a8a64cd29aab6114826cd5e5be5.
dot: graph is too large for cairo-renderer bitmaps. Scaling by 0.515018 to fit
pnmtopng: 15 colors found
Revision graph left in 
/home/logs/results/bisect/xen-4.12-testing/build-i386-prev.xen-build.{dot,ps,png,html,svg}.
Populating 151028...
Need 151028.build-i386-prev (like 150943)
Creating 151028.build-i386-prev (copying from 150943)
Checking for flail (since 143677)...

*** Flailing - >=5 identical flights to no useful effect ***
  Bisector is flailing: >=5 identical flights generated.
  Problem occurs when attempting to test this revision:
   b15646484eaffcf7cc464fdea0214498f26addc2 
c1ab7d7ed5306641784a9ed8972db5151a49a1a1 
8bfcd2e5fd1c6a8a64cd29aab6114826cd5e5be5
  
  Identical previous flights on this branch:
   151027  started 2020-06-10 22:38:53 Z  blessed real-bisect
   151026  started 2020-06-10 21:27:47 Z  blessed real-bisect
   151025  started 2020-06-10 20:17:35 Z  blessed real-bisect
   151023  started 2020-06-10 18:43:53 Z  blessed real-bisect
   150992  started 2020-06-10 02:07:44 Z  blessed real-bisect
   151028  just generated