[xen-4.11-testing bisection] doubtful build-i386-prev

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

branch xen-4.11-testing
xenbranch xen-4.11-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:
   a7947b6366a660d4d655371fe6bc96315097c06d 
6a3b59ab9c7dc00331c21346052dfa6a0df45aa3 
24d62e126296b3f67dabdd49887d41d8ed69487f
  
  Identical previous flights on this branch:
   150996  started 2020-06-10 03:19:39 Z  blessed real-bisect
   150994  started 2020-06-10 02:20:03 Z  blessed real-bisect
   150988  started 2020-06-10 00:54:44 Z  blessed real-bisect
   150986  started 2020-06-10 00:11:45 Z  blessed real-bisect
   150984  started 2020-06-09 23:47:57 Z  blessed real-bisect
   150998  just generated


----------------------------------------
Running cs-bisection-step 
--graph-out=/home/logs/results/bisect/xen-4.11-testing/build-i386-prev.xen-build
 --summary-out=tmp/150998.bisection-summary --basis-template=150040 
--blessings=real,real-bisect --flight=150998 xen-4.11-testing build-i386-prev 
xen-build
Searching for failure / basis pass:
 150953 fail [host=albana0] / 150040 [host=fiano1] 149701 ok.
Failure / basis pass flights: 150953 / 149701
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 
b922c4431df33ed5b724e53c3f3348e470ddd349
Basis pass a7947b6366a660d4d655371fe6bc96315097c06d 
6a3b59ab9c7dc00331c21346052dfa6a0df45aa3 
24d62e126296b3f67dabdd49887d41d8ed69487f
Generating revisions with ./adhoc-revtuple-generator  
git://xenbits.xen.org/osstest/ovmf.git#a7947b6366a660d4d655371fe6bc96315097c06d-6ff7c838d09224dd4e4c9b5b93152d8db1b19740
 
git://xenbits.xen.org/osstest/seabios.git#6a3b59ab9c7dc00331c21346052dfa6a0df45aa3-2e3de6253422112ae43e608661ba94ea6b345694
 
git://xenbits.xen.org/xen.git#24d62e126296b3f67dabdd49887d41d8ed69487f-b922c4431df33ed5b724e53c3f3348e470ddd349
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 12573 nodes in revision graph
Searching for test results:
 149701 pass a7947b6366a660d4d655371fe6bc96315097c06d 
6a3b59ab9c7dc00331c21346052dfa6a0df45aa3 
24d62e126296b3f67dabdd49887d41d8ed69487f
 150040 [host=fiano1]
 150942 fail 6ff7c838d09224dd4e4c9b5b93152d8db1b19740 
2e3de6253422112ae43e608661ba94ea6b345694 
b922c4431df33ed5b724e53c3f3348e470ddd349
 150984 !! flight 150984 no revisions or trees
 150986 !! flight 150986 no revisions or trees
 150953 fail 6ff7c838d09224dd4e4c9b5b93152d8db1b19740 
2e3de6253422112ae43e608661ba94ea6b345694 
b922c4431df33ed5b724e53c3f3348e470ddd349
 150988 !! flight 150988 no revisions or trees
 150994 !! flight 150994 no revisions or trees
 150996 !! flight 150996 no revisions or trees
Searching for interesting versions
 Result found: flight 149701 (pass), for basis pass
 For basis failure, parent search stopping at 
a7947b6366a660d4d655371fe6bc96315097c06d 
6a3b59ab9c7dc00331c21346052dfa6a0df45aa3 
24d62e126296b3f67dabdd49887d41d8ed69487f, results HASH(0x555e51b26128) Result 
found: flight 150942 (fail), for basis failure (at ancestor ~5383)
Need to reproduce basis pass (pass); had 1 already.
Should test a7947b6366a660d4d655371fe6bc96315097c06d 
6a3b59ab9c7dc00331c21346052dfa6a0df45aa3 
24d62e126296b3f67dabdd49887d41d8ed69487f.
pnmtopng: 62 colors found
Revision graph left in 
/home/logs/results/bisect/xen-4.11-testing/build-i386-prev.xen-build.{dot,ps,png,html,svg}.
Populating 150998...
Need 150998.build-i386-prev (like 150953)
Creating 150998.build-i386-prev (copying from 150953)
Checking for flail (since 149701)...

*** Flailing - >=5 identical flights to no useful effect ***
  Bisector is flailing: >=5 identical flights generated.
  Problem occurs when attempting to test this revision:
   a7947b6366a660d4d655371fe6bc96315097c06d 
6a3b59ab9c7dc00331c21346052dfa6a0df45aa3 
24d62e126296b3f67dabdd49887d41d8ed69487f
  
  Identical previous flights on this branch:
   150996  started 2020-06-10 03:19:39 Z  blessed real-bisect
   150994  started 2020-06-10 02:20:03 Z  blessed real-bisect
   150988  started 2020-06-10 00:54:44 Z  blessed real-bisect
   150986  started 2020-06-10 00:11:45 Z  blessed real-bisect
   150984  started 2020-06-09 23:47:57 Z  blessed real-bisect
   150998  just generated