-XX:MarkSweepAlwaysCompactCount=0 crashes the JVM

[Srinivas Ramakrishna]

It's because MaxSweepAlwaysCompactCount is used to divide the (serial old)
gc count and gives a divide
by zero exception when set to zero. Perhaps the flag should be set to a
minimum value of 1 in
Arguments::check_vm_args_consistency()? If folks agree, could someone file
a CR (and
if you prefer i can submit a simple patch).

thanks!
-- ramki
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