[xen-4.11-testing bisection] doubtful build-amd64-prev

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

branch xen-4.11-testing
xenbranch xen-4.11-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:
   b15646484eaffcf7cc464fdea0214498f26addc2 
c1ab7d7ed5306641784a9ed8972db5151a49a1a1 
3131bf956ab159295ecdde0c5ad003d0c5af4695
  
  Identical previous flights on this branch:
   146150  started 2020-01-16 01:58:56 Z  blessed real-bisect
   146149  started 2020-01-16 01:55:59 Z  blessed real-bisect
   146148  started 2020-01-16 01:49:57 Z  blessed real-bisect
   146147  started 2020-01-16 01:47:04 Z  blessed real-bisect
   146145  started 2020-01-16 01:11:44 Z  blessed real-bisect
   146151  just generated


----------------------------------------
Running cs-bisection-step 
--graph-out=/home/logs/results/bisect/xen-4.11-testing/build-amd64-prev.xen-build
 --summary-out=tmp/146151.bisection-summary --basis-template=144753 
--blessings=real,real-bisect --flight=146151 xen-4.11-testing build-amd64-prev 
xen-build
Searching for failure / basis pass:
 146077 fail [host=fiano1] / 144753 [host=godello0] 144716 [host=godello1] 
144505 [host=godello0] 144376 [host=godello0] 144309 [host=huxelrebe1] 144300 
[host=godello0] 144293 [host=godello1] 144288 [host=godello0] 144285 
[host=godello0] 144278 [host=godello1] 144267 [host=godello0] 144255 
[host=godello0] 144246 [host=godello1] 144240 [host=godello1] 144234 
[host=godello0] 144226 [host=godello1] 144212 [host=godello0] 144206 
[host=huxelrebe0] 144200 [host=godello0] 144194 [host=godello0] 144190 \
 [host=huxelrebe0] 144184 [host=godello0] 144174 [host=godello0] 144163 
[host=godello1] 144152 [host=godello0] 144130 [host=godello1] 144099 
[host=godello1] 144073 [host=godello1] 144058 [host=godello1] 144025 
[host=huxelrebe0] 144002 [host=godello1] 143989 [host=godello1] 143973 
[host=godello1] 143939 [host=chardonnay0] 143905 [host=albana0] 143778 
[host=godello1] 143586 ok.
Failure / basis pass flights: 146077 / 143586
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 
6cb1cb9c63e91b71ce639e7b7cf08ca85d44266f
Basis pass b15646484eaffcf7cc464fdea0214498f26addc2 
c1ab7d7ed5306641784a9ed8972db5151a49a1a1 
3131bf956ab159295ecdde0c5ad003d0c5af4695
Generating revisions with ./adhoc-revtuple-generator  
git://xenbits.xen.org/osstest/ovmf.git#b15646484eaffcf7cc464fdea0214498f26addc2-70911f1f4aee0366b6122f2b90d367ec0f066beb
 
git://xenbits.xen.org/osstest/seabios.git#c1ab7d7ed5306641784a9ed8972db5151a49a1a1-2f4d068645c211e309812372cd0ac58c9024e93b
 
git://xenbits.xen.org/xen.git#3131bf956ab159295ecdde0c5ad003d0c5af4695-6cb1cb9c63e91b71ce639e7b7cf08ca85d44266f
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 7570 nodes in revision graph
Searching for test results:
 143479 [host=godello1]
 143586 pass b15646484eaffcf7cc464fdea0214498f26addc2 
c1ab7d7ed5306641784a9ed8972db5151a49a1a1 
3131bf956ab159295ecdde0c5ad003d0c5af4695
 143778 [host=godello1]
 143905 [host=albana0]
 143939 [host=chardonnay0]
 143989 [host=godello1]
 143973 [host=godello1]
 144002 [host=godello1]
 144025 [host=huxelrebe0]
 144073 [host=godello1]
 144058 [host=godello1]
 144099 [host=godello1]
 144130 [host=godello1]
 144152 [host=godello0]
 144163 [host=godello1]
 144184 [host=godello0]
 144174 [host=godello0]
 144190 [host=huxelrebe0]
 144194 [host=godello0]
 144234 [host=godello0]
 144200 [host=godello0]
 144212 [host=godello0]
 144206 [host=huxelrebe0]
 144246 [host=godello1]
 144226 [host=godello1]
 144240 [host=godello1]
 144255 [host=godello0]
 144267 [host=godello0]
 144278 [host=godello1]
 144285 [host=godello0]
 144288 [host=godello0]
 144293 [host=godello1]
 144300 [host=godello0]
 144309 [host=huxelrebe1]
 144376 [host=godello0]
 144496 [host=godello0]
 144505 [host=godello0]
 144753 [host=godello0]
 144716 [host=godello1]
 146077 fail 70911f1f4aee0366b6122f2b90d367ec0f066beb 
2f4d068645c211e309812372cd0ac58c9024e93b 
6cb1cb9c63e91b71ce639e7b7cf08ca85d44266f
 146149 !! flight 146149 no revisions or trees
 146150 !! flight 146150 no revisions or trees
 146145 !! flight 146145 no revisions or trees
 146147 !! flight 146147 no revisions or trees
 146148 !! flight 146148 no revisions or trees
Searching for interesting versions
 Result found: flight 143586 (pass), for basis pass
 Result found: flight 146077 (fail), for basis failure
Need to reproduce basis pass (pass); had 1 already.
Should test b15646484eaffcf7cc464fdea0214498f26addc2 
c1ab7d7ed5306641784a9ed8972db5151a49a1a1 
3131bf956ab159295ecdde0c5ad003d0c5af4695.
pnmtopng: 54 colors found
Revision graph left in 
/home/logs/results/bisect/xen-4.11-testing/build-amd64-prev.xen-build.{dot,ps,png,html,svg}.
Populating 146151...
Need 146151.build-amd64-prev (like 146077)
Creating 146151.build-amd64-prev (copying from 146077)
Checking for flail (since 143586)...

*** 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 
3131bf956ab159295ecdde0c5ad003d0c5af4695
  
  Identical previous flights on this branch:
   146150  started 2020-01-16 01:58:56 Z  blessed real-bisect
   146149  started 2020-01-16 01:55:59 Z  blessed real-bisect
   146148  started 2020-01-16 01:49:57 Z  blessed real-bisect
   146147  started 2020-01-16 01:47:04 Z  blessed real-bisect
   146145  started 2020-01-16 01:11:44 Z  blessed real-bisect
   146151  just generated


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