Opened 11 years ago
Last modified 11 years ago
#11227 closed defect
gcc-4.6.0 optimization bug with cliquer-1.2.p7.spkg — at Version 5
Reported by: | mariah | Owned by: | mariah |
---|---|---|---|
Priority: | blocker | Milestone: | sage-4.7 |
Component: | packages: standard | Keywords: | cliquer spkg |
Cc: | Merged in: | ||
Authors: | Reviewers: | ||
Report Upstream: | Fixed upstream, but not in a stable release. | Work issues: | |
Branch: | Commit: | ||
Dependencies: | Stopgaps: |
Description (last modified by )
On various 64-bit x86_64 Linux machines (for example, the Skynet machine eno), sage-4.7.alpha5 built with gcc-4.6.0 fails various tests with a timeout:
sage -t -long -force_lib devel/sage/sage/graphs/graph_generators.py # Time out sage -t -long -force_lib devel/sage/sage/graphs/graph_coloring.py # Time out sage -t -long -force_lib devel/sage/sage/graphs/graph.py # Time out sage -t -long -force_lib devel/sage/sage/graphs/cliquer.pyx # Time out
For other gcc 4.6.0 specific problems see #11216.
Change History (5)
comment:1 Changed 11 years ago by
- Milestone set to sage-4.7.1
- Owner changed from tbd to mariah
comment:2 Changed 11 years ago by
If src/reorder.c
is built with -O1 rather than -O2, then the problem goes away.
comment:3 follow-up: ↓ 4 Changed 11 years ago by
- Description modified (diff)
On what platform is this problem?
Dave
comment:4 in reply to: ↑ 3 Changed 11 years ago by
Replying to drkirkby:
On what platform is this problem?
Dave
Apologies for not mentioning this. I see the problem on skynet:eno (x86_64-Linux-core2). I have not checked to see if the problem exists on other architectures.
comment:5 Changed 11 years ago by
- Description modified (diff)
- Keywords cliquer added
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The following code triggers the problem (code does not return):
If cliquer-1.2.p7.spkg is rebuilt with -O1 rather than -O2, then the problem goes away.