[xen-4.13-testing bisection] doubtful build-amd64-prev

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

branch xen-4.13-testing
xenbranch xen-4.13-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:
   caa917491a4bfb295d2afad86e4c34fd48e1f7b5 
f21b5a4aeb020f2a5e2c6503f906a9349dd2f069 
890711084303e6b56881b836d91273ec56015b5e
  
  Identical previous flights on this branch:
   146163  started 2020-01-16 13:28:27 Z  blessed real-bisect
   146159  started 2020-01-16 10:03:54 Z  blessed real-bisect
   146155  started 2020-01-16 07:43:18 Z  blessed real-bisect
   146153  started 2020-01-16 05:39:18 Z  blessed real-bisect
   146107  started 2020-01-15 08:52:32 Z  blessed real-bisect
   146166  just generated


----------------------------------------
Running cs-bisection-step 
--graph-out=/home/logs/results/bisect/xen-4.13-testing/build-amd64-prev.xen-build
 --summary-out=tmp/146166.bisection-summary --basis-template=145145 
--blessings=real,real-bisect --flight=146166 xen-4.13-testing build-amd64-prev 
xen-build
Searching for failure / basis pass:
 146079 fail [host=elbling1] / 145145 [host=italia0] 144932 [host=godello0] 
144774 [host=godello1] 144736 [host=albana1] 144708 [host=albana1] 144673 
[host=godello0] 144609 [host=godello0] 144509 [host=godello1] 144500 
[host=godello1] 144493 [host=albana1] 144402 [host=huxelrebe1] 144399 
[host=godello1] template as basis? using template as basis.
Failure / basis pass flights: 146079 / 145145
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 70911f1f4aee0366b6122f2b90d367ec0f066beb 
2f4d068645c211e309812372cd0ac58c9024e93b 
890711084303e6b56881b836d91273ec56015b5e
Basis pass caa917491a4bfb295d2afad86e4c34fd48e1f7b5 
f21b5a4aeb020f2a5e2c6503f906a9349dd2f069 
890711084303e6b56881b836d91273ec56015b5e
Generating revisions with ./adhoc-revtuple-generator  
git://xenbits.xen.org/osstest/ovmf.git#caa917491a4bfb295d2afad86e4c34fd48e1f7b5-70911f1f4aee0366b6122f2b90d367ec0f066beb
 
git://xenbits.xen.org/osstest/seabios.git#f21b5a4aeb020f2a5e2c6503f906a9349dd2f069-2f4d068645c211e309812372cd0ac58c9024e93b
 
git://xenbits.xen.org/xen.git#890711084303e6b56881b836d91273ec56015b5e-890711084303e6b56881b836d91273ec56015b5e
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 7534 nodes in revision graph
Searching for test results:
 145145 [host=italia0]
 146079 fail 70911f1f4aee0366b6122f2b90d367ec0f066beb 
2f4d068645c211e309812372cd0ac58c9024e93b 
890711084303e6b56881b836d91273ec56015b5e
 146159 !! flight 146159 no revisions or trees
 146107 !! flight 146107 no revisions or trees
 146153 !! flight 146153 no revisions or trees
 146163 !! flight 146163 no revisions or trees
 146155 !! flight 146155 no revisions or trees
Searching for interesting versions
Need to reproduce basis pass (pass); had 0 already.
Should test caa917491a4bfb295d2afad86e4c34fd48e1f7b5 
f21b5a4aeb020f2a5e2c6503f906a9349dd2f069 
890711084303e6b56881b836d91273ec56015b5e.
pnmtopng: 200 colors found
Revision graph left in 
/home/logs/results/bisect/xen-4.13-testing/build-amd64-prev.xen-build.{dot,ps,png,html,svg}.
Populating 146166...
Need 146166.build-amd64-prev (like 146079)
Creating 146166.build-amd64-prev (copying from 146079)
Checking for flail (since 0)...

*** Flailing - >=5 identical flights to no useful effect ***
  Bisector is flailing: >=5 identical flights generated.
  Problem occurs when attempting to test this revision:
   caa917491a4bfb295d2afad86e4c34fd48e1f7b5 
f21b5a4aeb020f2a5e2c6503f906a9349dd2f069 
890711084303e6b56881b836d91273ec56015b5e
  
  Identical previous flights on this branch:
   146163  started 2020-01-16 13:28:27 Z  blessed real-bisect
   146159  started 2020-01-16 10:03:54 Z  blessed real-bisect
   146155  started 2020-01-16 07:43:18 Z  blessed real-bisect
   146153  started 2020-01-16 05:39:18 Z  blessed real-bisect
   146107  started 2020-01-15 08:52:32 Z  blessed real-bisect
   146166  just generated


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