I just reran the test, first copying the SVN repository over and removing all '.svn' directories.  Then I created a repo "fossil new t", changed dir to the interesting dir and "fossil open ../t; fossil add *; fossil ci -m 'test'"

Then I created another directory, and did "fossil open ../t" there.  The result is the same: a "Killed" message.

However, something interesting: I ran "top" in another window, and saw the memory usage of fossil go upwards of 1.5G before it was finally killed.

So I think the problem is there is a (bad) memory leak in the "open" scenario (and perhaps generally).  For I cannot see any reason for the memory usage to ramp up so high.

I also did "find . -type f | wc" in that dir, the result is 52,218.  The fossil rstats reported 51,192 files ... I'm not sure what the discrepancy would be besides the _FOSSIL_ and two manifest files.