Hi Steven, maybe I cheered too soon - could you please try to install sage-core-4.3.5-r1? That is the version which failed for me if I did not do something wrong. I also noticed that it took longer to trigger SIGABRT with this version.
In every case sage-4.3.5-r1 should be ready to get hg bisect working to find out which commit could have caused this issue. Christopher
