[xen-4.0-testing bisection] complete build-amd64

[xen-4.0-testing bisection] complete build-amd64

[xen.org]

branch xen-4.0-testing
xen branch xen-4.0-testing
job build-amd64
test xen-build

Tree: git://mariner.uk.xensource.com/qemu-xen-4.0-testing.git
Tree: http://hg.uk.xensource.com/xen-4.0-testing.hg

*** Found and reproduced problem changeset ***

  Bug is in tree:  http://hg.uk.xensource.com/xen-4.0-testing.hg
  Bug introduced:  19eefd764f6f
  Bug not present: c6034ee9b46e


  changeset:   21492:19eefd764f6f
  user:        Olaf Hering <olaf@aepfle.de>
  date:        Sat May 21 07:57:03 2011 +0100
      
      gcc-4.6 compile fix: build with -Wno-unused-but-set-variable
      
      Avoid "error: variable 'unused' set but not used
      [-Werror=unused-but-set-variable]" with gcc 4.6.
      
      Signed-off-by: Olaf Hering <olaf@aepfle.de>
      xen-unstable changeset:   23368:0f670f5146c8
      xen-unstable date:        Sat May 21 07:55:46 2011 +0100
      
      


For bisection revision-tuple graph see:
   http://www.chiark.greenend.org.uk/~xensrcts/results/bisect.xen-4.0-testing.build-amd64.xen-build.html
Revision IDs in each graph node refer, respectively, to the Trees above.

----------------------------------------
Searching for failure / basis pass:
 7171 fail [host=woodlouse] / 7136 ok.
Failure / basis pass flights: 7171 / 7136
Tree: git://mariner.uk.xensource.com/qemu-xen-4.0-testing.git
Tree: http://hg.uk.xensource.com/xen-4.0-testing.hg
Latest 6d5b7ee3acfe8cc10681d2583a38398f7470ec2a 9f8f91033546
Basis pass 6d5b7ee3acfe8cc10681d2583a38398f7470ec2a c6034ee9b46e
Generating revisions with ./adhoc-revtuple-generator  git://mariner.uk.xensource.com/qemu-xen-4.0-testing.git#6d5b7ee3acfe8cc10681d2583a38398f7470ec2a-6d5b7ee3acfe8cc10681d2583a38398f7470ec2a http://hg.uk.xensource.com/xen-4.0-testing.hg#c6034ee9b46e-9f8f91033546
pulling from http://hg.uk.xensource.com/xen-4.0-testing.hg
searching for changes
no changes found
pulling from http://hg.uk.xensource.com/xen-4.0-testing.hg
searching for changes
no changes found
Loaded 1001 nodes in revision graph
Searching for test results:
 7174 fail 6d5b7ee3acfe8cc10681d2583a38398f7470ec2a 19eefd764f6f
 7147 fail 6d5b7ee3acfe8cc10681d2583a38398f7470ec2a 9f8f91033546
 7175 pass 6d5b7ee3acfe8cc10681d2583a38398f7470ec2a c6034ee9b46e
 7177 fail 6d5b7ee3acfe8cc10681d2583a38398f7470ec2a 19eefd764f6f
 7163 fail 6d5b7ee3acfe8cc10681d2583a38398f7470ec2a 9f8f91033546
 7142 fail 6d5b7ee3acfe8cc10681d2583a38398f7470ec2a 9f8f91033546
 7166 pass 6d5b7ee3acfe8cc10681d2583a38398f7470ec2a c6034ee9b46e
 7168 fail 6d5b7ee3acfe8cc10681d2583a38398f7470ec2a 9f8f91033546
 7169 fail 6d5b7ee3acfe8cc10681d2583a38398f7470ec2a 82f6fd38f5c2
 7154 fail 6d5b7ee3acfe8cc10681d2583a38398f7470ec2a 9f8f91033546
 7171 fail 6d5b7ee3acfe8cc10681d2583a38398f7470ec2a 9f8f91033546
 7136 pass 6d5b7ee3acfe8cc10681d2583a38398f7470ec2a c6034ee9b46e
 7172 fail 6d5b7ee3acfe8cc10681d2583a38398f7470ec2a 19eefd764f6f
 7173 pass 6d5b7ee3acfe8cc10681d2583a38398f7470ec2a c6034ee9b46e
Searching for interesting versions
 Result found: flight 7136 (pass), for basis pass
 Result found: flight 7142 (fail), for basis failure
 Repro found: flight 7166 (pass), for basis pass
 Repro found: flight 7168 (fail), for basis failure
 0 revisions at 6d5b7ee3acfe8cc10681d2583a38398f7470ec2a c6034ee9b46e
No revisions left to test, checking graph state.
 Result found: flight 7136 (pass), for last pass
 Result found: flight 7172 (fail), for first failure
 Repro found: flight 7173 (pass), for last pass
 Repro found: flight 7174 (fail), for first failure
 Repro found: flight 7175 (pass), for last pass
 Repro found: flight 7177 (fail), for first failure

*** Found and reproduced problem changeset ***

  Bug is in tree:  http://hg.uk.xensource.com/xen-4.0-testing.hg
  Bug introduced:  19eefd764f6f
  Bug not present: c6034ee9b46e

pulling from http://hg.uk.xensource.com/xen-4.0-testing.hg
searching for changes
no changes found

  changeset:   21492:19eefd764f6f
  user:        Olaf Hering <olaf@aepfle.de>
  date:        Sat May 21 07:57:03 2011 +0100
      
      gcc-4.6 compile fix: build with -Wno-unused-but-set-variable
      
      Avoid "error: variable 'unused' set but not used
      [-Werror=unused-but-set-variable]" with gcc 4.6.
      
      Signed-off-by: Olaf Hering <olaf@aepfle.de>
      xen-unstable changeset:   23368:0f670f5146c8
      xen-unstable date:        Sat May 21 07:55:46 2011 +0100
      
      

Revision graph left in /home/xc_osstest/results/bisect.xen-4.0-testing.build-amd64.xen-build.{dot,ps,png,html}.
----------------------------------------
7177: ALL FAIL

flight 7177 xen-4.0-testing real-bisect [real]
http://www.chiark.greenend.org.uk/~xensrcts/logs/7177/

Tests which did not succeed:
 build-amd64                   4 xen-build                    fail


jobs:
 build-amd64                                                  fail     


------------------------------------------------------------
sg-report-flight on woking.cam.xci-test.com
logs: /home/xc_osstest/logs
images: /home/xc_osstest/images

Logs, config files, etc. are available at
    http://www.chiark.greenend.org.uk/~xensrcts/logs

Test harness code can be found at
    http://xenbits.xensource.com/gitweb?p=osstest.git;a=summary

Re: [xen-4.0-testing bisection] complete build-amd64

[Ian Jackson]

Ian Jackson writes ("[xen-4.0-testing bisection] complete build-amd64"):
> *** Found and reproduced problem changeset ***
> 
>   Bug is in tree:  http://hg.uk.xensource.com/xen-4.0-testing.hg
>   Bug introduced:  19eefd764f6f
>   Bug not present: c6034ee9b46e
> 
> 
>   changeset:   21492:19eefd764f6f
>   user:        Olaf Hering <olaf@aepfle.de>
>   date:        Sat May 21 07:57:03 2011 +0100
>       
>       gcc-4.6 compile fix: build with -Wno-unused-but-set-variable
>       
>       Avoid "error: variable 'unused' set but not used
>       [-Werror=unused-but-set-variable]" with gcc 4.6.
>       
>       Signed-off-by: Olaf Hering <olaf@aepfle.de>
>       xen-unstable changeset:   23368:0f670f5146c8
>       xen-unstable date:        Sat May 21 07:55:46 2011 +0100

Leaving aside the debugging of the reason for this:

I think this demonstrates that it's a bad idea to backport changes
immediately from xen-unstable into earlier trees.

Changes which allegedly fix build system or OS incompatibilties are
particularly bad for this, because it is those changes which are
themselves most likely to (a) have hard to predict outcomes (b) break
the build (c) in a way not detected by a developer's smoke test.

Ian.