[Issue 1512] GC infinite loop when invalid user code runs.

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=1512





------- Comment #7 from davidl at 126.com  2007-09-19 02:54 -------
I don't know if the following is the sane check. But this prevent the GC from
looping in this case.
add to phobos\internal\gc\gcx.d
line 1570:

                if(list is list.next)
                {
                        throw new Exception("looping while we try to free the
list!");
                }


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