Handle OOM in rb_openlist. Found by Ralf Wildenhues.  Bug filed on Handle OOM in rb_openlist. Found by Ralf Wildenhues.  Bug filed on https://sourceforge.net/project/libredblack, Bug-ID #500600.
Handle OOM in rb_openlist. Found by Ralf Wildenhues.  Bug filed on
Handle OOM in rb_openlist. Found by Ralf Wildenhues.  Bug filed on
https://sourceforge.net/project/libredblack, Bug-ID #500600.

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