Red Hat Bugzilla – Bug 189376
Regression test failed on network address related functions
Last modified: 2007-11-30 17:11:30 EST
Description of problem:
While (second) rebuilding on postgresql error
appears at the test stage: some network-mask
related functions returns bad results.
Previous rebuild with same rpm was fine (local build 31 mar 2006).
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. rpmbuild -bi --target i586 postgresql.spec
build failed on test stage.
Build without errors.
Created attachment 127989 [details]
regression diff file
This looks to me like it could be a compiler bug, seeing that the same source
code passes this test fine on many other platforms. Did you update gcc since
your last successful build? Does the failure go away if you change the --target
The code in question is network_network() in src/backend/utils/adt/network.c
if you want to take a closer look. I'm betting that gcc is misoptimizing the
Yes, gcc was updated every time as it was updated in ``development''
Fedora branch. Tested arch: i566, i686.
I will try to rewrite some code to find misoptimization.
And will update gcc once again.
It's really a gcc bug.
The miscompilated code in src/backend/utils/adt/network.c: network_network:
byte = 0;
If bits == 25, the loop running 3 times, not 4,
If loop header rewrited as
all tests passed.
Reclassifying as gcc bug.
Tracking thsi upstream.