weakrefs to resolve cyclical dependencies that prevent garbage collection
weakrefs to resolve cyclical dependencies that prevent garbage collection

jakirkham/sh,amoffat/sh,ppannuto/sh,achernet/sh,amoffat/sh,simudream/sh,twocngdagz/sh,z-fork/sh,rdhyee/sh,pdelong42/sh,germangh/sh,Stupeflix/sh,pombredanne/sh,rsmith31415/sh,lwgarmstrong/sh