[Vm-dev] [OpenSmalltalk/opensmalltalk-vm] pushRcvr fails for context instances whose sender has been set to an Integer instance (Issue #654)

[Eliot Miranda]

I’m sorry but this counts as shooting oneself in the foot.  This should be handled in the fuzzed as an exception. Contexts are created via Context class>>#sender:receiver:method:arguments:, or if via newForMethod:, properly initialized  with a method soon thereafter.  Why? Because supporting methodless contexts adds checks in critical paths that will slow down not only process switch, but also return.

If there is a bug it is that Context class>>#newMethod: does not initialize the method inst var.  I shall fix this in trunk.  Then any fuzzer must be written to test contexts as a special case and instantiate them via Context class>>#newMethod: or Context class>>#sender:receiver:method:arguments:

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